Refactored package structure and made some getValue() methods generic

git-svn-id: https://src.springframework.org/svn/spring-framework/trunk@390 50f2f4bb-b051-0410-bef5-90022cba6387

org.springframework.expression/.project

@@ -12,8 +12,14 @@
 			<arguments>
 			</arguments>
 		</buildCommand>
+		<buildCommand>
+			<name>structure101.java.eclipse.plugin.JDMEclipseBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
 	</buildSpec>
 	<natures>
 		<nature>org.eclipse.jdt.core.javanature</nature>
+		<nature>structure101.java.eclipse.plugin.JDMEclipseNature</nature>
 	</natures>
 </projectDescription>

org.springframework.expression/src/main/java/org/springframework/expression/Expression.java

@@ -41,7 +41,7 @@ public interface Expression {
 	 * @return the evaluation result
 	 * @throws EvaluationException if there is a problem during evaluation
 	 */
-	public Object getValue(Class<?> desiredResultType) throws EvaluationException;
+	public <T> T getValue(Class<T> desiredResultType) throws EvaluationException;
 
 	/**
 	 * Evaluate this expression in the provided context and return the result of evaluation.
@@ -62,7 +62,7 @@ public interface Expression {
 	 * @return the evaluation result
 	 * @throws EvaluationException if there is a problem during evaluation
 	 */
-	public Object getValue(EvaluationContext context, Class<?> desiredResultType) throws EvaluationException;
+	public <T> T getValue(EvaluationContext context, Class<T> desiredResultType) throws EvaluationException;
 
 	/**
 	 * Set this expression in the provided context to the value provided.

org.springframework.expression/src/main/java/org/springframework/expression/common/CompositeStringExpression.java

@@ -62,14 +62,14 @@ public class CompositeStringExpression implements Expression {
 		throw new EvaluationException(expressionString, "Cannot call setValue() on a composite expression");
 	}
 
-	public Object getValue(EvaluationContext context, Class<?> expectedResultType) throws EvaluationException {
+	public <T> T getValue(EvaluationContext context, Class<T> expectedResultType) throws EvaluationException {
 		Object value = getValue(context);
-		return ExpressionUtils.convert(context, value, expectedResultType);
+		return (T)ExpressionUtils.convert(context, value, expectedResultType);
 	}
 
-	public Object getValue(Class<?> expectedResultType) throws EvaluationException {
+	public <T> T getValue(Class<T> expectedResultType) throws EvaluationException {
 		Object value = getValue();
-		return ExpressionUtils.convert(null, value, expectedResultType);
+		return (T)ExpressionUtils.convert(null, value, expectedResultType);
 	}
 
 	public boolean isWritable(EvaluationContext context) throws EvaluationException {

org.springframework.expression/src/main/java/org/springframework/expression/common/LiteralExpression.java

@@ -44,14 +44,14 @@ public class LiteralExpression implements Expression {
 		throw new EvaluationException(literalValue, "Cannot call setValue() on a LiteralExpression");
 	}
 
-	public Object getValue(EvaluationContext context, Class<?> expectedResultType) throws EvaluationException {
+	public <T> T getValue(EvaluationContext context, Class<T> expectedResultType) throws EvaluationException {
 		Object value = getValue(context);
-		return ExpressionUtils.convert(context, value, expectedResultType);
+		return (T)ExpressionUtils.convert(context, value, expectedResultType);
 	}
 
-	public Object getValue(Class<?> expectedResultType) throws EvaluationException {
+	public <T> T getValue(Class<T> expectedResultType) throws EvaluationException {
 		Object value = getValue();
-		return ExpressionUtils.convert(null, value, expectedResultType);
+		return (T)ExpressionUtils.convert(null, value, expectedResultType);
 	}
 
 	public boolean isWritable(EvaluationContext context) throws EvaluationException {

org.springframework.expression/src/main/java/org/springframework/expression/spel/ExpressionState.java

@@ -15,6 +15,7 @@
  */
 package org.springframework.expression.spel;
 
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Stack;
@@ -27,7 +28,6 @@ import org.springframework.expression.PropertyAccessor;
 import org.springframework.expression.TypeComparator;
 import org.springframework.expression.TypeConverter;
 import org.springframework.expression.TypeUtils;
-import org.springframework.expression.spel.internal.VariableScope;
 
 /**
  * An ExpressionState is for maintaining per-expression-evaluation state, any changes to it are not seen by other
@@ -199,4 +199,42 @@ public class ExpressionState {
 		return relatedContext;
 	}
 
+	/**
+	 * A new scope is entered when a function is called and it is used to hold the parameters to the function call.  If the names
+	 * of the parameters clash with those in a higher level scope, those in the higher level scope will not be accessible whilst
+	 * the function is executing.  When the function returns the scope is exited.
+	 * 
+	 * @author Andy Clement
+	 *
+	 */
+	static class VariableScope {
+
+		private final Map<String, Object> vars = new HashMap<String, Object>();
+
+		public VariableScope() { }
+
+		public VariableScope(Map<String, Object> arguments) {
+			if (arguments!=null) {
+				vars.putAll(arguments);
+			}
+		}
+		
+		public VariableScope(String name,Object value) {
+			vars.put(name,value);
+		}
+
+		public Object lookupVariable(String name) {
+			return vars.get(name);
+		}
+
+		public void setVariable(String name, Object value) {
+			vars.put(name,value);
+		}
+
+		public boolean definesVariable(String name) {
+			return vars.containsKey(name);
+		}
+
+	}
+
 }

org.springframework.expression/src/main/java/org/springframework/expression/spel/SpelExpression.java

@@ -19,8 +19,6 @@ import org.springframework.expression.EvaluationContext;
 import org.springframework.expression.EvaluationException;
 import org.springframework.expression.Expression;
 import org.springframework.expression.common.ExpressionUtils;
-import org.springframework.expression.spel.ast.SpelNode;
-import org.springframework.expression.spel.standard.StandardEvaluationContext;
 
 /**
  * A SpelExpressions represents a parsed (valid) expression that is ready to be evaluated in a specified context. An
@@ -31,6 +29,7 @@ import org.springframework.expression.spel.standard.StandardEvaluationContext;
  * 
  */
 public class SpelExpression implements Expression {
+	
 	private final String expression;
 	public final SpelNode ast;
 
@@ -40,7 +39,7 @@ public class SpelExpression implements Expression {
 	 * @param expression
 	 * @param ast
 	 */
-	SpelExpression(String expression, SpelNode ast) {
+	public SpelExpression(String expression, SpelNode ast) {
 		this.expression = expression;
 		this.ast = ast;
 	}
@@ -56,8 +55,7 @@ public class SpelExpression implements Expression {
 	 * {@inheritDoc}
 	 */
 	public Object getValue() throws EvaluationException {
-		EvaluationContext eContext = new StandardEvaluationContext();
-		return ast.getValue(new ExpressionState(eContext));
+		return ast.getValue(null);
 	}
 
 	/**
@@ -70,18 +68,17 @@ public class SpelExpression implements Expression {
 	/**
 	 * {@inheritDoc}
 	 */
-	public Object getValue(EvaluationContext context, Class<?> expectedResultType) throws EvaluationException {
+	public <T> T getValue(EvaluationContext context, Class<T> expectedResultType) throws EvaluationException {
 		Object result = ast.getValue(new ExpressionState(context));
 
 		if (result != null && expectedResultType != null) {
 			Class<?> resultType = result.getClass();
-			if (expectedResultType.isAssignableFrom(resultType)) {
-				return result;
+			if (!expectedResultType.isAssignableFrom(resultType)) {
+				// Attempt conversion to the requested type, may throw an exception
+				result = context.getTypeUtils().getTypeConverter().convertValue(result, expectedResultType);
 			}
-			// Attempt conversion to the requested type, may throw an exception
-			return context.getTypeUtils().getTypeConverter().convertValue(result, expectedResultType);
 		}
-		return result;
+		return (T)result;
 	}
 
 	/**
@@ -145,9 +142,10 @@ public class SpelExpression implements Expression {
 	/**
 	 * {@inheritDoc}
 	 */
-	public Object getValue(Class<?> expectedResultType) throws EvaluationException {
+	public <T> T getValue(Class<T> expectedResultType) throws EvaluationException {
 		Object result = getValue();
-		return ExpressionUtils.convert(null, result, expectedResultType);
+		// TODO propagate generic-ness into convert
+		return (T)ExpressionUtils.convert(null, result, expectedResultType);
 	}
 
 }

org.springframework.expression/src/main/java/org/springframework/expression/spel/SpelExpressionParser.java

@@ -15,21 +15,12 @@
  */
 package org.springframework.expression.spel;
 
-import org.antlr.runtime.ANTLRStringStream;
-import org.antlr.runtime.CommonTokenStream;
-import org.antlr.runtime.RecognitionException;
 import org.springframework.expression.Expression;
 import org.springframework.expression.ParseException;
 import org.springframework.expression.ParserContext;
 import org.springframework.expression.common.DefaultNonTemplateParserContext;
 import org.springframework.expression.common.TemplateAwareExpressionParser;
-import org.springframework.expression.spel.ast.SpelNode;
-import org.springframework.expression.spel.generated.SpringExpressionsLexer;
-import org.springframework.expression.spel.generated.SpringExpressionsParser.expr_return;
-import org.springframework.expression.spel.internal.InternalELException;
-import org.springframework.expression.spel.internal.SpelTreeAdaptor;
-import org.springframework.expression.spel.internal.SpringExpressionsLexerExtender;
-import org.springframework.expression.spel.internal.SpringExpressionsParserExtender;
+import org.springframework.expression.spel.antlr.SpelAntlrExpressionParser;
 
 /**
  * Instances of this parser class can process Spring Expression Language format expressions. The result of parsing an
@@ -40,17 +31,11 @@ import org.springframework.expression.spel.internal.SpringExpressionsParserExten
  */
 public class SpelExpressionParser extends TemplateAwareExpressionParser {
 
-	private final SpringExpressionsLexer lexer;
-	private final SpringExpressionsParserExtender parser;
+	private final SpelInternalParser expressionParser;
 
-	/**
-	 * Should be constructed through the SpelParserFactory
-	 */
 	public SpelExpressionParser() {
-		lexer = new SpringExpressionsLexerExtender();
-		CommonTokenStream tokens = new CommonTokenStream(lexer);
-		parser = new SpringExpressionsParserExtender(tokens);
-		parser.setTreeAdaptor(new SpelTreeAdaptor());
+		// Use an Antlr based expression parser
+		expressionParser = new SpelAntlrExpressionParser();
 	}
 
 	/**
@@ -63,22 +48,7 @@ public class SpelExpressionParser extends TemplateAwareExpressionParser {
 	 */
 	@Override
 	protected Expression doParseExpression(String expressionString, ParserContext context) throws ParseException {
-		try {
-			lexer.setCharStream(new ANTLRStringStream(expressionString));
-			CommonTokenStream tokens = new CommonTokenStream(lexer);
-			parser.setTokenStream(tokens);
-			expr_return exprReturn = parser.expr();
-			SpelExpression newExpression = new SpelExpression(expressionString, (SpelNode) exprReturn.getTree());
-			return newExpression;
-		} catch (RecognitionException re) {
-			ParseException exception = new ParseException(expressionString, "Recognition error at position: "
-					+ re.charPositionInLine + ": " + re.getMessage(), re);
-			throw exception;
-		} catch (InternalELException e) {
-			SpelException wrappedException = e.getCause();
-			throw new ParseException(expressionString, "Parsing problem: " + wrappedException.getMessage(),
-					wrappedException);
-		}
+		return expressionParser.doParseExpression(expressionString,context);
 	}
 
 	/**
@@ -88,4 +58,8 @@ public class SpelExpressionParser extends TemplateAwareExpressionParser {
 	public SpelExpression parseExpression(String expressionString) throws ParseException {
 		return (SpelExpression) super.parseExpression(expressionString, DefaultNonTemplateParserContext.INSTANCE);
 	}
+
+	public interface SpelInternalParser {
+		Expression doParseExpression(String expressionString, ParserContext context) throws ParseException;
+	}
 }

org.springframework.expression/src/main/java/org/springframework/expression/spel/SpelUtilities.java

@@ -17,8 +17,6 @@ package org.springframework.expression.spel;
 
 import java.io.PrintStream;
 
-import org.springframework.expression.spel.ast.SpelNode;
-
 /**
  * Utilities for working with Spring Expressions.
  * 
@@ -45,10 +43,9 @@ public class SpelUtilities {
 	private static void printAST(PrintStream out, SpelNode t, String indent) {
 		if (t != null) {
 			StringBuilder sb = new StringBuilder();
-			String s = (t.getType() == -1 ? "EOF" : t.getClass().getSimpleName());
-			sb.append(indent).append(s);
-			sb.append("  value=").append(t.getText());
-			sb.append(t.getChildCount() < 2 ? "" : "  children=#" + t.getChildCount());
+			sb.append(indent).append(t.getClass().getSimpleName());
+			sb.append("  value:").append(t.toStringAST());
+			sb.append(t.getChildCount() < 2 ? "" : "  #children:" + t.getChildCount());
 			out.println(sb.toString());
 			for (int i = 0; i < t.getChildCount(); i++) {
 				printAST(out, t.getChild(i), indent + "  ");

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/Assign.java

@@ -28,15 +28,15 @@ import org.springframework.expression.spel.ExpressionState;
  * @author Andy Clement
  * 
  */
-public class Assign extends SpelNode {
+public class Assign extends SpelNodeImpl {
 
 	public Assign(Token payload) {
 		super(payload);
 	}
 
 	@Override
-	public Object getValue(ExpressionState state) throws EvaluationException {
-		Object newValue = getChild(1).getValue(state);
+	public Object getValueInternal(ExpressionState state) throws EvaluationException {
+		Object newValue = getChild(1).getValueInternal(state);
 		getChild(0).setValue(state, newValue);
 		return newValue;
 	}

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/CompoundExpression.java

@@ -26,7 +26,7 @@ import org.springframework.expression.spel.ExpressionState;
  * @author Andy Clement
  * 
  */
-public class CompoundExpression extends SpelNode {
+public class CompoundExpression extends SpelNodeImpl {
 
 	public CompoundExpression(Token payload) {
 		super(payload);
@@ -40,17 +40,17 @@ public class CompoundExpression extends SpelNode {
 	 * @return the final value from the last piece of the compound expression
 	 */
 	@Override
-	public Object getValue(ExpressionState state) throws EvaluationException {
+	public Object getValueInternal(ExpressionState state) throws EvaluationException {
 		Object result = null;
-		SpelNode nextNode = null;
+		SpelNodeImpl nextNode = null;
 		try {
 			nextNode = getChild(0);
-			result = nextNode.getValue(state);
+			result = nextNode.getValueInternal(state);
 			for (int i = 1; i < getChildCount(); i++) {
 				try {
 					state.pushActiveContextObject(result);
 					nextNode = getChild(i);
-					result = nextNode.getValue(state);
+					result = nextNode.getValueInternal(state);
 				} finally {
 					state.popActiveContextObject();
 				}
@@ -69,11 +69,11 @@ public class CompoundExpression extends SpelNode {
 			getChild(0).setValue(state, value);
 			return;
 		}
-		Object ctx = getChild(0).getValue(state);
+		Object ctx = getChild(0).getValueInternal(state);
 		for (int i = 1; i < getChildCount() - 1; i++) {
 			try {
 				state.pushActiveContextObject(ctx);
-				ctx = getChild(i).getValue(state);
+				ctx = getChild(i).getValueInternal(state);
 			} finally {
 				state.popActiveContextObject();
 			}
@@ -91,11 +91,11 @@ public class CompoundExpression extends SpelNode {
 		if (getChildCount() == 1) {
 			return getChild(0).isWritable(state);
 		}
-		Object ctx = getChild(0).getValue(state);
+		Object ctx = getChild(0).getValueInternal(state);
 		for (int i = 1; i < getChildCount() - 1; i++) {
 			try {
 				state.pushActiveContextObject(ctx);
-				ctx = getChild(i).getValue(state);
+				ctx = getChild(i).getValueInternal(state);
 			} finally {
 				state.popActiveContextObject();
 			}

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/ConstructorReference.java

@@ -42,7 +42,7 @@ import org.springframework.expression.spel.internal.Utils;
  * @author Andy Clement
  * 
  */
-public class ConstructorReference extends SpelNode {
+public class ConstructorReference extends SpelNodeImpl {
 
 	/**
 	 * The resolver/executor model {@link ConstructorResolver} supports the caching of executor objects that can run
@@ -71,7 +71,7 @@ public class ConstructorReference extends SpelNode {
 	 * Implements getValue() - delegating to the code for building an array or a simple type.
 	 */
 	@Override
-	public Object getValue(ExpressionState state) throws EvaluationException {
+	public Object getValueInternal(ExpressionState state) throws EvaluationException {
 		if (isArrayConstructor) {
 			return createArray(state);
 		} else {
@@ -99,7 +99,7 @@ public class ConstructorReference extends SpelNode {
 			// Next child is EXPRESSIONLIST token with children that are the
 			// expressions giving array size
 			sb.append("[");
-			SpelNode arrayRank = getChild(index++);
+			SpelNodeImpl arrayRank = getChild(index++);
 			for (int i = 0; i < arrayRank.getChildCount(); i++) {
 				if (i > 0)
 					sb.append(",");
@@ -126,7 +126,7 @@ public class ConstructorReference extends SpelNode {
 	 * @throws EvaluationException if there is a problem creating the array
 	 */
 	private Object createArray(ExpressionState state) throws EvaluationException {
-		Object intendedArrayType = getChild(0).getValue(state);
+		Object intendedArrayType = getChild(0).getValueInternal(state);
 		if (!(intendedArrayType instanceof String)) {
 			throw new SpelException(getChild(0).getCharPositionInLine(),
 					SpelMessages.TYPE_NAME_EXPECTED_FOR_ARRAY_CONSTRUCTION, Utils
@@ -155,7 +155,7 @@ public class ConstructorReference extends SpelNode {
 			// Array ranks are specified but is it a single or multiple dimension array?
 			int dimensions = getChild(1).getChildCount();
 			if (dimensions == 1) {
-				Object o = getChild(1).getValue(state);
+				Object o = getChild(1).getValueInternal(state);
 				int arraySize = state.toInteger(o);
 				if (getChildCount() == 3) {
 					// Check initializer length matches array size length
@@ -170,7 +170,7 @@ public class ConstructorReference extends SpelNode {
 				// Multi-dimensional - hold onto your hat !
 				int[] dims = new int[dimensions];
 				for (int d = 0; d < dimensions; d++) {
-					dims[d] = state.toInteger(getChild(1).getChild(d).getValue(state));
+					dims[d] = state.toInteger(getChild(1).getChild(d).getValueInternal(state));
 				}
 				newArray = Array.newInstance(componentType, dims);
 				// TODO check any specified initializer for the multidim array matches
@@ -179,12 +179,12 @@ public class ConstructorReference extends SpelNode {
 
 		// Populate the array using the initializer if one is specified
 		if (getChildCount() == 3) {
-			SpelNode initializer = getChild(2);
+			SpelNodeImpl initializer = getChild(2);
 			if (arrayTypeCode == TypeCode.OBJECT) {
 				Object[] newObjectArray = (Object[]) newArray;
 				for (int i = 0; i < newObjectArray.length; i++) {
-					SpelNode elementNode = initializer.getChild(i);
-					Object arrayEntry = elementNode.getValue(state);
+					SpelNodeImpl elementNode = initializer.getChild(i);
+					Object arrayEntry = elementNode.getValueInternal(state);
 					if (!componentType.isAssignableFrom(arrayEntry.getClass())) {
 						throw new SpelException(elementNode.getCharPositionInLine(),
 								SpelMessages.INCORRECT_ELEMENT_TYPE_FOR_ARRAY, componentType.getName(), arrayEntry
@@ -195,42 +195,42 @@ public class ConstructorReference extends SpelNode {
 			} else if (arrayTypeCode == TypeCode.INT) {
 				int[] newIntArray = (int[]) newArray;
 				for (int i = 0; i < newIntArray.length; i++) {
-					newIntArray[i] = state.toInteger(initializer.getChild(i).getValue(state));
+					newIntArray[i] = state.toInteger(initializer.getChild(i).getValueInternal(state));
 				}
 			} else if (arrayTypeCode == TypeCode.BOOLEAN) {
 				boolean[] newBooleanArray = (boolean[]) newArray;
 				for (int i = 0; i < newBooleanArray.length; i++) {
-					newBooleanArray[i] = state.toBoolean(initializer.getChild(i).getValue(state));
+					newBooleanArray[i] = state.toBoolean(initializer.getChild(i).getValueInternal(state));
 				}
 			} else if (arrayTypeCode == TypeCode.CHAR) {
 				char[] newCharArray = (char[]) newArray;
 				for (int i = 0; i < newCharArray.length; i++) {
-					newCharArray[i] = state.toCharacter(initializer.getChild(i).getValue(state));
+					newCharArray[i] = state.toCharacter(initializer.getChild(i).getValueInternal(state));
 				}
 			} else if (arrayTypeCode == TypeCode.SHORT) {
 				short[] newShortArray = (short[]) newArray;
 				for (int i = 0; i < newShortArray.length; i++) {
-					newShortArray[i] = state.toShort(initializer.getChild(i).getValue(state));
+					newShortArray[i] = state.toShort(initializer.getChild(i).getValueInternal(state));
 				}
 			} else if (arrayTypeCode == TypeCode.LONG) {
 				long[] newLongArray = (long[]) newArray;
 				for (int i = 0; i < newLongArray.length; i++) {
-					newLongArray[i] = state.toLong(initializer.getChild(i).getValue(state));
+					newLongArray[i] = state.toLong(initializer.getChild(i).getValueInternal(state));
 				}
 			} else if (arrayTypeCode == TypeCode.FLOAT) {
 				float[] newFloatArray = (float[]) newArray;
 				for (int i = 0; i < newFloatArray.length; i++) {
-					newFloatArray[i] = state.toFloat(initializer.getChild(i).getValue(state));
+					newFloatArray[i] = state.toFloat(initializer.getChild(i).getValueInternal(state));
 				}
 			} else if (arrayTypeCode == TypeCode.DOUBLE) {
 				double[] newDoubleArray = (double[]) newArray;
 				for (int i = 0; i < newDoubleArray.length; i++) {
-					newDoubleArray[i] = state.toDouble(initializer.getChild(i).getValue(state));
+					newDoubleArray[i] = state.toDouble(initializer.getChild(i).getValueInternal(state));
 				}
 			} else if (arrayTypeCode == TypeCode.BYTE) {
 				byte[] newByteArray = (byte[]) newArray;
 				for (int i = 0; i < newByteArray.length; i++) {
-					newByteArray[i] = state.toByte(initializer.getChild(i).getValue(state));
+					newByteArray[i] = state.toByte(initializer.getChild(i).getValueInternal(state));
 				}
 			}
 		}
@@ -249,7 +249,7 @@ public class ConstructorReference extends SpelNode {
 		Object[] arguments = new Object[getChildCount() - 1];
 		Class<?>[] argumentTypes = new Class[getChildCount() - 1];
 		for (int i = 0; i < arguments.length; i++) {
-			Object childValue = getChild(i + 1).getValue(state);
+			Object childValue = getChild(i + 1).getValueInternal(state);
 			arguments[i] = childValue;
 			argumentTypes[i] = childValue.getClass();
 		}
@@ -264,7 +264,7 @@ public class ConstructorReference extends SpelNode {
 		}
 
 		// either there was no accessor or it no longer exists
-		String typename = (String) getChild(0).getValue(state);
+		String typename = (String) getChild(0).getValueInternal(state);
 		cachedExecutor = findExecutorForConstructor(typename, argumentTypes, state);
 		try {
 			return cachedExecutor.execute(state.getEvaluationContext(), arguments);

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/Dot.java

@@ -25,7 +25,7 @@ import org.springframework.expression.spel.ExpressionState;
  * @author Andy Clement
  * 
  */
-public class Dot extends SpelNode {
+public class Dot extends SpelNodeImpl {
 	// TODO Keep Dot for the positional information or remove it?
 
 	public Dot(Token payload) {
@@ -38,7 +38,7 @@ public class Dot extends SpelNode {
 	}
 
 	@Override
-	public Object getValue(ExpressionState state) throws SpelException {
+	public Object getValueInternal(ExpressionState state) throws SpelException {
 		// This makes Dot a do-nothing operation, but this is not free in terms of computation
 		return state.getActiveContextObject();
 	}

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/FunctionReference.java

@@ -39,7 +39,7 @@ import org.springframework.expression.spel.reflection.ReflectionUtils;
  * 
  * @author Andy Clement
  */
-public class FunctionReference extends SpelNode {
+public class FunctionReference extends SpelNodeImpl {
 
 	private final String name;
 
@@ -49,7 +49,7 @@ public class FunctionReference extends SpelNode {
 	}
 
 	@Override
-	public Object getValue(ExpressionState state) throws EvaluationException {
+	public Object getValueInternal(ExpressionState state) throws EvaluationException {
 		Object o = state.lookupVariable(name);
 		if (o == null) {
 			throw new SpelException(SpelMessages.FUNCTION_NOT_DEFINED, name);
@@ -139,7 +139,7 @@ public class FunctionReference extends SpelNode {
 		// Compute arguments to the function
 		Object[] arguments = new Object[getChildCount()];
 		for (int i = 0; i < arguments.length; i++) {
-			arguments[i] = getChild(i).getValue(state);
+			arguments[i] = getChild(i).getValueInternal(state);
 		}
 		return arguments;
 	}

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/Identifier.java

@@ -19,7 +19,7 @@ import org.antlr.runtime.Token;
 import org.springframework.expression.spel.SpelException;
 import org.springframework.expression.spel.ExpressionState;
 
-public class Identifier extends SpelNode {
+public class Identifier extends SpelNodeImpl {
 
 	private final String id;
 
@@ -34,7 +34,7 @@ public class Identifier extends SpelNode {
 	}
 
 	@Override
-	public String getValue(ExpressionState state) throws SpelException {
+	public String getValueInternal(ExpressionState state) throws SpelException {
 		return id;
 	}
 

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/Indexer.java

@@ -32,16 +32,16 @@ import org.springframework.expression.spel.SpelMessages;
  * 
  * @author Andy Clement
  */
-public class Indexer extends SpelNode {
+public class Indexer extends SpelNodeImpl {
 
 	public Indexer(Token payload) {
 		super(payload);
 	}
 
 	@Override
-	public Object getValue(ExpressionState state) throws EvaluationException {
+	public Object getValueInternal(ExpressionState state) throws EvaluationException {
 		Object ctx = state.getActiveContextObject();
-		Object index = getChild(0).getValue(state);
+		Object index = getChild(0).getValueInternal(state);
 
 		// Indexing into a Map
 		if (ctx instanceof Map) {

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/Literal.java

@@ -19,7 +19,7 @@ import org.antlr.runtime.Token;
 import org.springframework.expression.spel.ExpressionState;
 import org.springframework.expression.spel.SpelException;
 import org.springframework.expression.spel.SpelMessages;
-import org.springframework.expression.spel.internal.InternalELException;
+import org.springframework.expression.spel.WrappedELException;
 
 /**
  * Common superclass for nodes representing literals (boolean, string, number, etc).
@@ -27,7 +27,7 @@ import org.springframework.expression.spel.internal.InternalELException;
  * @author Andy Clement
  * 
  */
-public abstract class Literal extends SpelNode {
+public abstract class Literal extends SpelNodeImpl {
 
 	public Literal(Token payload) {
 		super(payload);
@@ -36,7 +36,7 @@ public abstract class Literal extends SpelNode {
 	public abstract Object getLiteralValue();
 
 	@Override
-	public final Object getValue(ExpressionState state) throws SpelException {
+	public final Object getValueInternal(ExpressionState state) throws SpelException {
 		return getLiteralValue();
 	}
 
@@ -84,7 +84,7 @@ public abstract class Literal extends SpelNode {
 				long value = Long.parseLong(numberString, radix);
 				return new LongLiteral(numberToken, value);
 			} catch (NumberFormatException nfe) {
-				throw new InternalELException(new SpelException(numberToken.getCharPositionInLine(), nfe,
+				throw new WrappedELException(new SpelException(numberToken.getCharPositionInLine(), nfe,
 						SpelMessages.NOT_A_LONG, numberToken.getText()));
 			}
 		} else {
@@ -92,7 +92,7 @@ public abstract class Literal extends SpelNode {
 				int value = Integer.parseInt(numberString, radix);
 				return new IntLiteral(numberToken, value);
 			} catch (NumberFormatException nfe) {
-				throw new InternalELException(new SpelException(numberToken.getCharPositionInLine(), nfe,
+				throw new WrappedELException(new SpelException(numberToken.getCharPositionInLine(), nfe,
 						SpelMessages.NOT_AN_INTEGER, numberToken.getText()));
 			}
 		}

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/MethodReference.java

@@ -28,7 +28,7 @@ import org.springframework.expression.spel.SpelException;
 import org.springframework.expression.spel.SpelMessages;
 import org.springframework.expression.spel.internal.Utils;
 
-public class MethodReference extends SpelNode {
+public class MethodReference extends SpelNodeImpl {
 
 	private final String name;
 	private MethodExecutor fastInvocationAccessor;
@@ -39,11 +39,11 @@ public class MethodReference extends SpelNode {
 	}
 
 	@Override
-	public Object getValue(ExpressionState state) throws EvaluationException {
+	public Object getValueInternal(ExpressionState state) throws EvaluationException {
 		Object currentContext = state.getActiveContextObject();
 		Object[] arguments = new Object[getChildCount()];
 		for (int i = 0; i < arguments.length; i++) {
-			arguments[i] = getChild(i).getValue(state);
+			arguments[i] = getChild(i).getValueInternal(state);
 		}
 		if (currentContext == null) {
 			throw new SpelException(getCharPositionInLine(), SpelMessages.ATTEMPTED_METHOD_CALL_ON_NULL_CONTEXT_OBJECT,

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/Operator.java

@@ -25,7 +25,7 @@ import org.springframework.expression.spel.ExpressionState;
  * 
  * @author Andy Clement
  */
-public abstract class Operator extends SpelNode {
+public abstract class Operator extends SpelNodeImpl {
 
 	public Operator(Token payload) {
 		super(payload);
@@ -39,11 +39,11 @@ public abstract class Operator extends SpelNode {
 		return false;
 	}
 
-	public SpelNode getLeftOperand() {
+	public SpelNodeImpl getLeftOperand() {
 		return getChild(0);
 	}
 
-	public SpelNode getRightOperand() {
+	public SpelNodeImpl getRightOperand() {
 		return getChild(1);
 	}
 

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/OperatorAnd.java

@@ -37,12 +37,12 @@ public class OperatorAnd extends Operator {
 	}
 
 	@Override
-	public Object getValue(ExpressionState state) throws EvaluationException {
+	public Object getValueInternal(ExpressionState state) throws EvaluationException {
 		boolean leftValue;
 		boolean rightValue;
 
 		try {
-			leftValue = state.toBoolean(getLeftOperand().getValue(state));
+			leftValue = state.toBoolean(getLeftOperand().getValueInternal(state));
 		} catch (SpelException ee) {
 			ee.setPosition(getLeftOperand().getCharPositionInLine());
 			throw ee;
@@ -53,7 +53,7 @@ public class OperatorAnd extends Operator {
 		}
 
 		try {
-			rightValue = state.toBoolean(getRightOperand().getValue(state));
+			rightValue = state.toBoolean(getRightOperand().getValueInternal(state));
 		} catch (SpelException ee) {
 			ee.setPosition(getRightOperand().getCharPositionInLine());
 			throw ee;

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/OperatorBetween.java

@@ -51,9 +51,9 @@ public class OperatorBetween extends Operator {
 	 * @throws EvaluationException if there is a problem evaluating the expression
 	 */
 	@Override
-	public Boolean getValue(ExpressionState state) throws EvaluationException {
-		Object left = getLeftOperand().getValue(state);
-		Object right = getRightOperand().getValue(state);
+	public Boolean getValueInternal(ExpressionState state) throws EvaluationException {
+		Object left = getLeftOperand().getValueInternal(state);
+		Object right = getRightOperand().getValueInternal(state);
 		if (!(right instanceof List) || ((List<?>) right).size() != 2) {
 			throw new SpelException(getRightOperand().getCharPositionInLine(),
 					SpelMessages.BETWEEN_RIGHT_OPERAND_MUST_BE_TWO_ELEMENT_LIST);

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/OperatorDivide.java

@@ -37,9 +37,9 @@ public class OperatorDivide extends Operator {
 	}
 
 	@Override
-	public Object getValue(ExpressionState state) throws EvaluationException {
-		Object operandOne = getLeftOperand().getValue(state);
-		Object operandTwo = getRightOperand().getValue(state);
+	public Object getValueInternal(ExpressionState state) throws EvaluationException {
+		Object operandOne = getLeftOperand().getValueInternal(state);
+		Object operandTwo = getRightOperand().getValueInternal(state);
 		if (operandOne instanceof Number && operandTwo instanceof Number) {
 			Number op1 = (Number) operandOne;
 			Number op2 = (Number) operandTwo;

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/OperatorEquality.java

@@ -36,9 +36,9 @@ public class OperatorEquality extends Operator {
 	}
 
 	@Override
-	public Object getValue(ExpressionState state) throws EvaluationException {
-		Object left = getLeftOperand().getValue(state);
-		Object right = getRightOperand().getValue(state);
+	public Object getValueInternal(ExpressionState state) throws EvaluationException {
+		Object left = getLeftOperand().getValueInternal(state);
+		Object right = getRightOperand().getValueInternal(state);
 		if (left instanceof Number && right instanceof Number) {
 			Number op1 = (Number) left;
 			Number op2 = (Number) right;

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/OperatorGreaterThan.java

@@ -36,9 +36,9 @@ public class OperatorGreaterThan extends Operator {
 	}
 
 	@Override
-	public Object getValue(ExpressionState state) throws EvaluationException {
-		Object left = getLeftOperand().getValue(state);
-		Object right = getRightOperand().getValue(state);
+	public Object getValueInternal(ExpressionState state) throws EvaluationException {
+		Object left = getLeftOperand().getValueInternal(state);
+		Object right = getRightOperand().getValueInternal(state);
 		if (left instanceof Number && right instanceof Number) {
 			Number op1 = (Number) left;
 			Number op2 = (Number) right;

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/OperatorGreaterThanOrEqual.java

@@ -36,9 +36,9 @@ public class OperatorGreaterThanOrEqual extends Operator {
 	}
 
 	@Override
-	public Object getValue(ExpressionState state) throws EvaluationException {
-		Object left = getLeftOperand().getValue(state);
-		Object right = getRightOperand().getValue(state);
+	public Object getValueInternal(ExpressionState state) throws EvaluationException {
+		Object left = getLeftOperand().getValueInternal(state);
+		Object right = getRightOperand().getValueInternal(state);
 		if (left instanceof Number && right instanceof Number) {
 			Number op1 = (Number) left;
 			Number op2 = (Number) right;

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/OperatorInequality.java

@@ -36,9 +36,9 @@ public class OperatorInequality extends Operator {
 	}
 
 	@Override
-	public Object getValue(ExpressionState state) throws EvaluationException {
-		Object left = getLeftOperand().getValue(state);
-		Object right = getRightOperand().getValue(state);
+	public Object getValueInternal(ExpressionState state) throws EvaluationException {
+		Object left = getLeftOperand().getValueInternal(state);
+		Object right = getRightOperand().getValueInternal(state);
 		if (left instanceof Number && right instanceof Number) {
 			Number op1 = (Number) left;
 			Number op2 = (Number) right;

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/OperatorInstanceof.java

@@ -47,9 +47,9 @@ public class OperatorInstanceof extends Operator {
 	 * @throws EvaluationException if there is a problem evaluating the expression
 	 */
 	@Override
-	public Boolean getValue(ExpressionState state) throws EvaluationException {
-		Object left = getLeftOperand().getValue(state);
-		Object right = getRightOperand().getValue(state);
+	public Boolean getValueInternal(ExpressionState state) throws EvaluationException {
+		Object left = getLeftOperand().getValueInternal(state);
+		Object right = getRightOperand().getValueInternal(state);
 		if (left == null) {
 			return false; // null is not an instanceof anything
 		}

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/OperatorLessThan.java

@@ -36,9 +36,9 @@ public class OperatorLessThan extends Operator {
 	}
 
 	@Override
-	public Object getValue(ExpressionState state) throws EvaluationException {
-		Object left = getLeftOperand().getValue(state);
-		Object right = getRightOperand().getValue(state);
+	public Object getValueInternal(ExpressionState state) throws EvaluationException {
+		Object left = getLeftOperand().getValueInternal(state);
+		Object right = getRightOperand().getValueInternal(state);
 		if (left instanceof Number && right instanceof Number) {
 			Number op1 = (Number) left;
 			Number op2 = (Number) right;

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/OperatorLessThanOrEqual.java

@@ -31,9 +31,9 @@ public class OperatorLessThanOrEqual extends Operator {
 	}
 
 	@Override
-	public Object getValue(ExpressionState state) throws EvaluationException {
-		Object left = getLeftOperand().getValue(state);
-		Object right = getRightOperand().getValue(state);
+	public Object getValueInternal(ExpressionState state) throws EvaluationException {
+		Object left = getLeftOperand().getValueInternal(state);
+		Object right = getRightOperand().getValueInternal(state);
 		if (left instanceof Number && right instanceof Number) {
 			Number op1 = (Number) left;
 			Number op2 = (Number) right;

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/OperatorMatches.java

@@ -50,11 +50,11 @@ public class OperatorMatches extends Operator {
 	 * @throws EvaluationException if there is a problem evaluating the expression (e.g. the regex is invalid)
 	 */
 	@Override
-	public Boolean getValue(ExpressionState state) throws EvaluationException {
-		SpelNode leftOp = getLeftOperand();
-		SpelNode rightOp = getRightOperand();
+	public Boolean getValueInternal(ExpressionState state) throws EvaluationException {
+		SpelNodeImpl leftOp = getLeftOperand();
+		SpelNodeImpl rightOp = getRightOperand();
 		Object left = leftOp.getValue(state, String.class);
-		Object right = getRightOperand().getValue(state);
+		Object right = getRightOperand().getValueInternal(state);
 		try {
 			if (!(left instanceof String)) {
 				throw new SpelException(leftOp.getCharPositionInLine(),

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/OperatorMinus.java

@@ -18,9 +18,9 @@ package org.springframework.expression.spel.ast;
 import org.antlr.runtime.Token;
 import org.springframework.expression.EvaluationException;
 import org.springframework.expression.Operation;
+import org.springframework.expression.spel.ExpressionState;
 import org.springframework.expression.spel.SpelException;
 import org.springframework.expression.spel.SpelMessages;
-import org.springframework.expression.spel.ExpressionState;
 
 /**
  * Implements the minus operator. If there is only one operand it is a unary minus.
@@ -47,11 +47,11 @@ public class OperatorMinus extends Operator {
 	}
 
 	@Override
-	public Object getValue(ExpressionState state) throws EvaluationException {
-		SpelNode leftOp = getLeftOperand();
-		SpelNode rightOp = getRightOperand();
+	public Object getValueInternal(ExpressionState state) throws EvaluationException {
+		SpelNodeImpl leftOp = getLeftOperand();
+		SpelNodeImpl rightOp = getRightOperand();
 		if (rightOp == null) {// If only one operand, then this is unary minus
-			Object left = leftOp.getValue(state);
+			Object left = leftOp.getValueInternal(state);
 			if (left instanceof Number) {
 				Number n = (Number) left;
 				if (left instanceof Double) {
@@ -70,8 +70,8 @@ public class OperatorMinus extends Operator {
 			}
 			throw new SpelException(SpelMessages.CANNOT_NEGATE_TYPE, left.getClass().getName());
 		} else {
-			Object left = leftOp.getValue(state);
-			Object right = rightOp.getValue(state);
+			Object left = leftOp.getValueInternal(state);
+			Object right = rightOp.getValueInternal(state);
 			if (left instanceof Number && right instanceof Number) {
 				Number op1 = (Number) left;
 				Number op2 = (Number) right;

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/OperatorModulus.java

@@ -37,9 +37,9 @@ public class OperatorModulus extends Operator {
 	}
 
 	@Override
-	public Object getValue(ExpressionState state) throws EvaluationException {
-		Object operandOne = getLeftOperand().getValue(state);
-		Object operandTwo = getRightOperand().getValue(state);
+	public Object getValueInternal(ExpressionState state) throws EvaluationException {
+		Object operandOne = getLeftOperand().getValueInternal(state);
+		Object operandTwo = getRightOperand().getValueInternal(state);
 		if (operandOne instanceof Number && operandTwo instanceof Number) {
 			Number op1 = (Number) operandOne;
 			Number op2 = (Number) operandTwo;

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/OperatorMultiply.java

@@ -48,9 +48,9 @@ public class OperatorMultiply extends Operator {
 	 * </ul>
 	 */
 	@Override
-	public Object getValue(ExpressionState state) throws EvaluationException {
-		Object operandOne = getLeftOperand().getValue(state);
-		Object operandTwo = getRightOperand().getValue(state);
+	public Object getValueInternal(ExpressionState state) throws EvaluationException {
+		Object operandOne = getLeftOperand().getValueInternal(state);
+		Object operandTwo = getRightOperand().getValueInternal(state);
 		if (operandOne instanceof Number && operandTwo instanceof Number) {
 			Number op1 = (Number) operandOne;
 			Number op2 = (Number) operandTwo;

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/OperatorNot.java

@@ -20,16 +20,16 @@ import org.springframework.expression.EvaluationException;
 import org.springframework.expression.spel.SpelException;
 import org.springframework.expression.spel.ExpressionState;
 
-public class OperatorNot extends SpelNode { // Not is a unary operator so do not extend BinaryOperator
+public class OperatorNot extends SpelNodeImpl { // Not is a unary operator so do not extend BinaryOperator
 
 	public OperatorNot(Token payload) {
 		super(payload);
 	}
 
 	@Override
-	public Object getValue(ExpressionState state) throws EvaluationException {
+	public Object getValueInternal(ExpressionState state) throws EvaluationException {
 		try {
-			boolean value = state.toBoolean(getChild(0).getValue(state));
+			boolean value = state.toBoolean(getChild(0).getValueInternal(state));
 			return !value;
 		} catch (SpelException see) {
 			see.setPosition(getChild(0).getCharPositionInLine());

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/OperatorOr.java

@@ -37,11 +37,11 @@ public class OperatorOr extends Operator {
 	}
 
 	@Override
-	public Object getValue(ExpressionState state) throws EvaluationException {
+	public Object getValueInternal(ExpressionState state) throws EvaluationException {
 		boolean leftValue;
 		boolean rightValue;
 		try {
-			leftValue = state.toBoolean(getLeftOperand().getValue(state));
+			leftValue = state.toBoolean(getLeftOperand().getValueInternal(state));
 		} catch (SpelException see) {
 			see.setPosition(getLeftOperand().getCharPositionInLine());
 			throw see;
@@ -51,7 +51,7 @@ public class OperatorOr extends Operator {
 			return true; // no need to evaluate right operand
 
 		try {
-			rightValue = state.toBoolean(getRightOperand().getValue(state));
+			rightValue = state.toBoolean(getRightOperand().getValueInternal(state));
 		} catch (SpelException see) {
 			see.setPosition(getRightOperand().getCharPositionInLine());
 			throw see;

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/OperatorPlus.java

@@ -27,18 +27,18 @@ public class OperatorPlus extends Operator {
 	}
 
 	@Override
-	public Object getValue(ExpressionState state) throws EvaluationException {
-		SpelNode leftOp = getLeftOperand();
-		SpelNode rightOp = getRightOperand();
+	public Object getValueInternal(ExpressionState state) throws EvaluationException {
+		SpelNodeImpl leftOp = getLeftOperand();
+		SpelNodeImpl rightOp = getRightOperand();
 		if (rightOp == null) { // If only one operand, then this is unary plus
-			Object operandOne = leftOp.getValue(state);
+			Object operandOne = leftOp.getValueInternal(state);
 			if (operandOne instanceof Number) {
 				return new Integer(((Number) operandOne).intValue());
 			}
 			return state.operate(Operation.ADD, operandOne, null);
 		} else {
-			Object operandOne = leftOp.getValue(state);
-			Object operandTwo = rightOp.getValue(state);
+			Object operandOne = leftOp.getValueInternal(state);
+			Object operandTwo = rightOp.getValueInternal(state);
 			if (operandOne instanceof Number && operandTwo instanceof Number) {
 				Number op1 = (Number) operandOne;
 				Number op2 = (Number) operandTwo;

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/Placeholder.java

@@ -27,14 +27,14 @@ import org.springframework.expression.spel.ExpressionState;
  * @author Andy Clement
  * 
  */
-public class Placeholder extends SpelNode {
+public class Placeholder extends SpelNodeImpl {
 
 	public Placeholder(Token payload) {
 		super(payload);
 	}
 
 	@Override
-	public String getValue(ExpressionState state) throws SpelException {
+	public String getValueInternal(ExpressionState state) throws SpelException {
 		throw new SpelException(getCharPositionInLine(), SpelMessages.PLACEHOLDER_SHOULD_NEVER_BE_EVALUATED);
 	}
 

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/Projection.java

@@ -35,14 +35,14 @@ import org.springframework.expression.spel.internal.KeyValuePair;
  * @author Andy Clement
  * 
  */
-public class Projection extends SpelNode {
+public class Projection extends SpelNodeImpl {
 
 	public Projection(Token payload) {
 		super(payload);
 	}
 
 	@Override
-	public Object getValue(ExpressionState state) throws EvaluationException {
+	public Object getValueInternal(ExpressionState state) throws EvaluationException {
 		Object operand = state.getActiveContextObject();
 
 		// When the input is a map, we push a special context object on the stack
@@ -56,7 +56,7 @@ public class Projection extends SpelNode {
 			for (Object k : mapdata.keySet()) {
 				try {
 					state.pushActiveContextObject(new KeyValuePair(k, mapdata.get(k)));
-					result.add(getChild(0).getValue(state));
+					result.add(getChild(0).getValueInternal(state));
 				} finally {
 					state.popActiveContextObject();
 				}
@@ -71,7 +71,7 @@ public class Projection extends SpelNode {
 				try {
 					state.pushActiveContextObject(element);
 					state.enterScope("index", idx);
-					result.add(getChild(0).getValue(state));
+					result.add(getChild(0).getValueInternal(state));
 				} finally {
 					state.exitScope();
 					state.popActiveContextObject();

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/PropertyOrFieldReference.java

@@ -35,7 +35,7 @@ import org.springframework.expression.spel.internal.Utils;
  * 
  * @author Andy Clement
  */
-public class PropertyOrFieldReference extends SpelNode {
+public class PropertyOrFieldReference extends SpelNodeImpl {
 
 	public static boolean useCaching = true;
 
@@ -49,7 +49,7 @@ public class PropertyOrFieldReference extends SpelNode {
 	}
 
 	@Override
-	public Object getValue(ExpressionState state) throws SpelException {
+	public Object getValueInternal(ExpressionState state) throws SpelException {
 		return readProperty(state, name);
 	}
 

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/QualifiedIdentifier.java

@@ -27,7 +27,7 @@ import org.springframework.expression.spel.ExpressionState;
  * @author Andy Clement
  * 
  */
-public class QualifiedIdentifier extends SpelNode {
+public class QualifiedIdentifier extends SpelNodeImpl {
 
 	private String value;
 
@@ -37,14 +37,14 @@ public class QualifiedIdentifier extends SpelNode {
 	}
 
 	@Override
-	public Object getValue(ExpressionState state) throws EvaluationException {
+	public Object getValueInternal(ExpressionState state) throws EvaluationException {
 		// Cache the concatenation of child identifiers
 		if (value == null) {
 			StringBuilder sb = new StringBuilder();
 			for (int i = 0; i < getChildCount(); i++) {
 				if (i > 0)
 					sb.append(".");
-				sb.append(getChild(i).getValue(state));
+				sb.append(getChild(i).getValueInternal(state));
 			}
 			value = sb.toString();
 		}

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/Selection.java

@@ -36,7 +36,7 @@ import org.springframework.expression.spel.internal.KeyValuePair;
  * 
  * @author Andy Clement
  */
-public class Selection extends SpelNode {
+public class Selection extends SpelNodeImpl {
 
 	public final static int ALL = 0; // ?{}
 	public final static int FIRST = 1; // ^{}
@@ -50,9 +50,9 @@ public class Selection extends SpelNode {
 	}
 
 	@Override
-	public Object getValue(ExpressionState state) throws EvaluationException {
+	public Object getValueInternal(ExpressionState state) throws EvaluationException {
 		Object operand = state.getActiveContextObject();
-		SpelNode selectionCriteria = getChild(0);
+		SpelNodeImpl selectionCriteria = getChild(0);
 		if (operand instanceof Map) {
 			Map<?, ?> mapdata = (Map<?, ?>) operand;
 			List<Object> result = new ArrayList<Object>();
@@ -60,7 +60,7 @@ public class Selection extends SpelNode {
 				try {
 					Object kvpair = new KeyValuePair(k, mapdata.get(k));
 					state.pushActiveContextObject(kvpair);
-					Object o = selectionCriteria.getValue(state);
+					Object o = selectionCriteria.getValueInternal(state);
 					if (o instanceof Boolean) {
 						if (((Boolean) o).booleanValue() == true) {
 							if (variant == FIRST)
@@ -91,7 +91,7 @@ public class Selection extends SpelNode {
 				try {
 					state.pushActiveContextObject(element);
 					state.enterScope("index", idx);
-					Object o = selectionCriteria.getValue(state);
+					Object o = selectionCriteria.getValueInternal(state);
 					if (o instanceof Boolean) {
 						if (((Boolean) o).booleanValue() == true) {
 							if (variant == FIRST)

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/Ternary.java

@@ -25,7 +25,7 @@ import org.springframework.expression.spel.SpelException;
  * 
  * @author Andy Clement
  */
-public class Ternary extends SpelNode {
+public class Ternary extends SpelNodeImpl {
 
 	public Ternary(Token payload) {
 		super(payload);
@@ -39,13 +39,13 @@ public class Ternary extends SpelNode {
 	 * executing the chosen alternative
 	 */
 	@Override
-	public Object getValue(ExpressionState state) throws EvaluationException {
+	public Object getValueInternal(ExpressionState state) throws EvaluationException {
 		Boolean b = (Boolean) getChild(0).getValue(state, Boolean.class);
 		try {
 			if (b) {
-				return getChild(1).getValue(state);
+				return getChild(1).getValueInternal(state);
 			} else {
-				return getChild(2).getValue(state);
+				return getChild(2).getValueInternal(state);
 			}
 		} catch (SpelException ex) {
 			ex.setPosition(getChild(0).getCharPositionInLine());

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/TypeReference.java

@@ -27,16 +27,16 @@ import org.springframework.expression.spel.internal.TypeCode;
  * @author Andy Clement
  * 
  */
-public class TypeReference extends SpelNode {
+public class TypeReference extends SpelNodeImpl {
 
 	public TypeReference(Token payload) {
 		super(payload);
 	}
 
 	@Override
-	public Object getValue(ExpressionState state) throws EvaluationException {
+	public Object getValueInternal(ExpressionState state) throws EvaluationException {
 		// TODO possible optimization here if we cache the discovered type reference, but can we do that?
-		String typename = (String) getChild(0).getValue(state);
+		String typename = (String) getChild(0).getValueInternal(state);
 		if (typename.indexOf(".") == -1 && Character.isLowerCase(typename.charAt(0))) {
 			TypeCode tc = TypeCode.forName(typename);
 			if (tc != TypeCode.OBJECT) {

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/VariableReference.java

@@ -26,7 +26,7 @@ import org.springframework.expression.spel.ExpressionState;
  * @author Andy Clement
  * 
  */
-public class VariableReference extends SpelNode {
+public class VariableReference extends SpelNodeImpl {
 
 	// Well known variables:
 	private final static String THIS = "this"; // currently active context object
@@ -40,7 +40,7 @@ public class VariableReference extends SpelNode {
 	}
 
 	@Override
-	public Object getValue(ExpressionState state) throws SpelException {
+	public Object getValueInternal(ExpressionState state) throws SpelException {
 		if (name.equals(THIS))
 			return state.getActiveContextObject();
 		if (name.equals(ROOT))

org.springframework.expression/src/main/java/org/springframework/expression/spel/generated/SpringExpressionsParser.java

@@ -1,14 +1,22 @@
 // $ANTLR 3.0.1 /Users/aclement/el2/spring-framework/trunk/org.springframework.expression/src/main/java/org/springframework/expression/spel/generated/SpringExpressions.g 2008-09-16 19:06:07
 package org.springframework.expression.spel.generated;
 
-import org.antlr.runtime.*;
-import java.util.Stack;
-import java.util.List;
-import java.util.ArrayList;
-import java.util.Map;
 import java.util.HashMap;
+import java.util.Stack;
 
-import org.antlr.runtime.tree.*;
+import org.antlr.runtime.BitSet;
+import org.antlr.runtime.EarlyExitException;
+import org.antlr.runtime.MismatchedSetException;
+import org.antlr.runtime.NoViableAltException;
+import org.antlr.runtime.Parser;
+import org.antlr.runtime.ParserRuleReturnScope;
+import org.antlr.runtime.RecognitionException;
+import org.antlr.runtime.Token;
+import org.antlr.runtime.TokenStream;
+import org.antlr.runtime.tree.CommonTreeAdaptor;
+import org.antlr.runtime.tree.RewriteRuleSubtreeStream;
+import org.antlr.runtime.tree.RewriteRuleTokenStream;
+import org.antlr.runtime.tree.TreeAdaptor;
 
 public class SpringExpressionsParser extends Parser {
     public static final String[] tokenNames = new String[] {

org.springframework.expression/src/test/java/org/springframework/expression/spel/ConstructorInvocationTests.java

@@ -24,6 +24,8 @@ import org.springframework.expression.spel.standard.StandardEvaluationContext;
  */
 public class ConstructorInvocationTests extends ExpressionTestCase {
 
+	// Some tests commented out as language support has been removed for now
+	
 	// public void testPrimitiveTypeArrayConstructors() {
 	// evaluate("new int[]{1,2,3,4}.count()", 4, Integer.class);
 	// evaluate("new boolean[]{true,false,true}.count()", 3, Integer.class);
@@ -46,11 +48,6 @@ public class ConstructorInvocationTests extends ExpressionTestCase {
 	// evaluate("new byte[]{1,2,3,4}[0]", (byte) 1, Byte.class);
 	// }
 
-	public void testTypeConstructors() {
-		evaluate("new String('hello world')", "hello world", String.class);
-		// evaluate("new String(new char[]{'h','e','l','l','o'})", "hello", String.class);
-	}
-
 	// public void testErrorCases() {
 	// evaluateAndCheckError("new char[7]{'a','c','d','e'}", SpelMessages.INITIALIZER_LENGTH_INCORRECT);
 	// evaluateAndCheckError("new char[3]{'a','c','d','e'}", SpelMessages.INITIALIZER_LENGTH_INCORRECT);
@@ -75,6 +72,11 @@ public class ConstructorInvocationTests extends ExpressionTestCase {
 	// new String[3][4].getClass());
 	// }
 
+	public void testTypeConstructors() {
+		evaluate("new String('hello world')", "hello world", String.class);
+		// evaluate("new String(new char[]{'h','e','l','l','o'})", "hello", String.class);
+	}
+	
 	/*
 	 * These tests are attempting to call constructors where we need to widen or convert the argument in order to
 	 * satisfy a suitable constructor.

org.springframework.expression/src/test/java/org/springframework/expression/spel/EvaluationTests.java

@@ -18,6 +18,8 @@ package org.springframework.expression.spel;
 /**
  * Tests the evaluation of real expressions in a real context.
  * 
+ * Node: Some tests commented out as language support has been removed
+ * 
  * @author Andy Clement
  */
 public class EvaluationTests extends ExpressionTestCase {