custom mappable type tests

git-svn-id: https://src.springframework.org/svn/spring-framework/trunk@2076 50f2f4bb-b051-0410-bef5-90022cba6387

org.springframework.context/src/main/java/org/springframework/mapping/support/MappableTypeFactory.java

@@ -43,6 +43,6 @@ public class MappableTypeFactory {
 			}
 		}
 		throw new IllegalArgumentException("Object of type [" + object.getClass().getName()
-				+ "] not mappable - no suitable MappableType exists");
+				+ "] is not mappable - no suitable MappableType exists");
 	}
 }

org.springframework.context/src/main/java/org/springframework/mapping/support/SpelMapper.java

@@ -208,7 +208,7 @@ public class SpelMapper implements Mapper<Object, Object> {
 
 	// internal helpers
 
-	private Class[] getRequiredTypeInfo(Mapper mapper) {
+	private Class<?>[] getRequiredTypeInfo(Mapper<?, ?> mapper) {
 		return GenericTypeResolver.resolveTypeArguments(mapper.getClass(), Mapper.class);
 	}
 

org.springframework.context/src/test/java/org/springframework/mapping/support/SpelMapperTests.java

@@ -7,13 +7,25 @@ import static org.junit.Assert.assertTrue;
 import java.math.BigDecimal;
 import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 
 import org.junit.Test;
+import org.springframework.core.convert.ConversionService;
 import org.springframework.core.convert.converter.Converter;
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.expression.AccessException;
+import org.springframework.expression.EvaluationContext;
+import org.springframework.expression.PropertyAccessor;
+import org.springframework.expression.TypedValue;
+import org.springframework.expression.spel.support.StandardEvaluationContext;
+import org.springframework.expression.spel.support.StandardTypeConverter;
 import org.springframework.mapping.Mapper;
 import org.springframework.mapping.MappingException;
+import org.w3c.dom.Element;
+import org.w3c.dom.NamedNodeMap;
 
 public class SpelMapperTests {
 
@@ -339,6 +351,82 @@ public class SpelMapperTests {
 		assertEquals(source, target.getLineItem().getOrder());
 	}
 
+	@Test
+	public void mapCustomMappableType() throws Exception {
+		XmlDocumentLoader loader = new XmlDocumentLoader();
+		loader.setValidating(false);
+
+		Object source = loader.loadDocument(new ClassPathResource("order.xml", getClass())).getDocumentElement();
+		Order target = new Order();
+
+		MappableTypeFactory factory = new MappableTypeFactory();
+		factory.add(new ElementMappableType());
+		factory.add(new BeanMappableType());
+		mapper.setMappableTypeFactory(factory);
+		mapper.map(source, target);
+
+		assertEquals(1, target.getNumber());
+	}
+
+	static class ElementMappableType implements MappableType<Element> {
+
+		public boolean isInstance(Object object) {
+			return object instanceof Element;
+		}
+
+		public Set<String> getFields(Element object) {
+			NamedNodeMap map = object.getAttributes();
+			Set<String> fields = new LinkedHashSet<String>();
+			for (int i = 0; i < map.getLength(); i++) {
+				fields.add(map.item(i).getNodeName());
+			}
+			return fields;
+		}
+
+		public EvaluationContext getEvaluationContext(Element object, ConversionService conversionService) {
+			StandardEvaluationContext context = new StandardEvaluationContext();
+			context.setRootObject(object);
+			context.setTypeConverter(new StandardTypeConverter(conversionService));
+			context.addPropertyAccessor(new PropertyAccessor() {
+				public boolean canRead(EvaluationContext context, Object target, String name) throws AccessException {
+					Element e = (Element) target;
+					return e.hasAttribute(name);
+				}
+
+				public boolean canWrite(EvaluationContext context, Object target, String name) throws AccessException {
+					return canRead(context, target, name);
+				}
+
+				public Class<?>[] getSpecificTargetClasses() {
+					return new Class[] { Element.class };
+				}
+
+				public TypedValue read(EvaluationContext context, Object target, String name) throws AccessException {
+					Element e = (Element) target;
+					return new TypedValue(e.getAttribute(name));
+				}
+
+				public void write(EvaluationContext context, Object target, String name, Object newValue)
+						throws AccessException {
+					Element e = (Element) target;
+					e.setAttribute(name, (String) newValue);
+				}
+			});
+			return context;
+		}
+
+	}
+
+	@Test(expected = IllegalArgumentException.class)
+	public void mapCustomMappableTypeNotSupported() throws Exception {
+		Order source = new Order();
+		Order target = new Order();
+
+		MappableTypeFactory factory = new MappableTypeFactory();
+		mapper.setMappableTypeFactory(factory);
+		mapper.map(source, target);
+	}
+
 	public static class Order {
 
 		private int number;

org.springframework.context/src/test/java/org/springframework/mapping/support/XmlDocumentLoader.java

@@ -0,0 +1,96 @@
+package org.springframework.mapping.support;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.springframework.core.io.Resource;
+import org.springframework.util.xml.SimpleSaxErrorHandler;
+import org.w3c.dom.Document;
+import org.xml.sax.EntityResolver;
+import org.xml.sax.SAXException;
+
+public class XmlDocumentLoader {
+
+	private static final Log logger = LogFactory.getLog(XmlDocumentLoader.class);
+
+	/**
+	 * JAXP attribute used to configure the schema language for validation.
+	 */
+	private static final String SCHEMA_LANGUAGE_ATTRIBUTE = "http://java.sun.com/xml/jaxp/properties/schemaLanguage";
+
+	/**
+	 * JAXP attribute value indicating the XSD schema language.
+	 */
+	private static final String XSD_SCHEMA_LANGUAGE = "http://www.w3.org/2001/XMLSchema";
+
+	/**
+	 * Flag indicating if the XML document parser will perform schema validation.
+	 */
+	private boolean validating = true;
+
+	/**
+	 * The spring-webflow schema resolution strategy.
+	 */
+	private EntityResolver entityResolver;
+
+	/**
+	 * Returns whether or not the XML parser will validate the document.
+	 */
+	public boolean isValidating() {
+		return validating;
+	}
+
+	/**
+	 * Set if the XML parser should validate the document and thus enforce a schema. Defaults to true.
+	 */
+	public void setValidating(boolean validating) {
+		this.validating = validating;
+	}
+
+	/**
+	 * Returns the SAX entity resolver used by the XML parser.
+	 */
+	public EntityResolver getEntityResolver() {
+		return entityResolver;
+	}
+
+	/**
+	 * Set a SAX entity resolver to be used for parsing. Can be overridden for custom entity resolution, for example
+	 * relative to some specific base path.
+	 */
+	public void setEntityResolver(EntityResolver entityResolver) {
+		this.entityResolver = entityResolver;
+	}
+
+	public Document loadDocument(Resource resource) throws IOException, ParserConfigurationException, SAXException {
+		InputStream is = null;
+		try {
+			is = resource.getInputStream();
+			DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
+			factory.setValidating(isValidating());
+			factory.setNamespaceAware(true);
+			try {
+				factory.setAttribute(SCHEMA_LANGUAGE_ATTRIBUTE, XSD_SCHEMA_LANGUAGE);
+			} catch (IllegalArgumentException ex) {
+				throw new IllegalStateException("Unable to validate using XSD: Your JAXP provider [" + factory
+						+ "] does not support XML Schema. "
+						+ "Are you running on Java 1.4 or below with Apache Crimson? "
+						+ "If so you must upgrade to Apache Xerces (or Java 5 or >) for full XSD support.");
+			}
+			DocumentBuilder docBuilder = factory.newDocumentBuilder();
+			docBuilder.setErrorHandler(new SimpleSaxErrorHandler(logger));
+			docBuilder.setEntityResolver(getEntityResolver());
+			return docBuilder.parse(is);
+		} finally {
+			if (is != null) {
+				is.close();
+			}
+		}
+	}
+}

org.springframework.context/src/test/java/org/springframework/mapping/support/order.xml

@@ -0,0 +1,3 @@
+<order number="1">
+    <lineitem amount="30.00" />
+</order>