string to map converters

git-svn-id: https://src.springframework.org/svn/spring-framework/trunk@1965 50f2f4bb-b051-0410-bef5-90022cba6387

org.springframework.core/src/main/java/org/springframework/core/convert/support/GenericConversionService.java

@@ -182,6 +182,7 @@ public class GenericConversionService implements ConversionService, ConverterReg
 	 * Hook to initialize the "generic" converters that require the full TypeDescriptor context to perform their conversion operations.
 	 */
 	protected void initGenericConverters() {
+		addGenericConverter(String[].class, Map.class, new StringArrayToMapGenericConverter(this));
 		addGenericConverter(Object[].class, Object[].class, new ArrayToArrayGenericConverter(this));
 		addGenericConverter(Object[].class, Collection.class, new ArrayToCollectionGenericConverter(this));
 		addGenericConverter(Object[].class, String.class, new ArrayToStringGenericConverter(this));
@@ -193,6 +194,7 @@ public class GenericConversionService implements ConversionService, ConverterReg
 		addGenericConverter(Map.class, Map.class, new MapToMapGenericConverter(this));
 		addGenericConverter(String.class, Object[].class, new StringToArrayGenericConverter(this));
 		addGenericConverter(String.class, Collection.class, new StringToCollectionGenericConverter(this));
+		addGenericConverter(String.class, Map.class, new StringToMapGenericConverter(this));
 		addGenericConverter(Object.class, Object[].class, new ObjectToArrayGenericConverter(this));
 		addGenericConverter(Object.class, Collection.class, new ObjectToCollectionGenericConverter(this));
 	}

org.springframework.core/src/main/java/org/springframework/core/convert/support/MapEntryConverter.java

@@ -0,0 +1,62 @@
+/**
+ * 
+ */
+package org.springframework.core.convert.support;
+
+import static org.springframework.core.convert.support.ConversionUtils.invokeConverter;
+
+import org.springframework.core.convert.ConverterNotFoundException;
+import org.springframework.core.convert.TypeDescriptor;
+
+class MapEntryConverter {
+
+	private GenericConverter keyConverter;
+
+	private GenericConverter valueConverter;
+
+	private TypeDescriptor sourceKeyType;
+
+	private TypeDescriptor sourceValueType;
+	
+	private TypeDescriptor targetKeyType;
+	
+	private TypeDescriptor targetValueType;
+
+	public MapEntryConverter(TypeDescriptor sourceKeyType, TypeDescriptor sourceValueType, TypeDescriptor targetKeyType,
+			TypeDescriptor targetValueType, boolean keysCompatible, boolean valuesCompatible,
+			GenericConversionService conversionService) {
+		if (sourceKeyType != TypeDescriptor.NULL && targetKeyType != TypeDescriptor.NULL && !keysCompatible) {
+			this.keyConverter = conversionService.getConverter(sourceKeyType, targetKeyType);
+			if (this.keyConverter == null) {
+				throw new ConverterNotFoundException(sourceKeyType, targetKeyType);
+			}				
+			this.sourceKeyType = sourceKeyType;
+			this.targetKeyType = targetKeyType;
+		}
+		if (sourceValueType != TypeDescriptor.NULL && targetValueType != TypeDescriptor.NULL && !valuesCompatible) {
+			this.valueConverter = conversionService.getConverter(sourceValueType, targetValueType);
+			if (this.valueConverter == null) {
+				throw new ConverterNotFoundException(sourceValueType, targetValueType);
+			}				
+			this.targetKeyType = targetKeyType;
+			this.targetValueType = targetValueType;
+		}
+	}
+
+	public Object convertKey(Object sourceKey) {
+		if (sourceKey != null && this.keyConverter != null) {
+			return invokeConverter(this.keyConverter, sourceKey, this.sourceKeyType, this.targetKeyType);
+		} else {
+			return sourceKey;
+		}
+	}
+
+	public Object convertValue(Object sourceValue) {
+		if (sourceValue != null && this.valueConverter != null) {
+			return invokeConverter(this.valueConverter, sourceValue, this.sourceValueType, this.targetValueType);
+		} else {
+			return sourceValue;
+		}
+	}
+
+}

org.springframework.core/src/main/java/org/springframework/core/convert/support/MapToMapGenericConverter.java

@@ -1,11 +1,9 @@
 package org.springframework.core.convert.support;
 
-import static org.springframework.core.convert.support.ConversionUtils.invokeConverter;
 
 import java.util.Map;
 
 import org.springframework.core.CollectionFactory;
-import org.springframework.core.convert.ConverterNotFoundException;
 import org.springframework.core.convert.TypeDescriptor;
 
 final class MapToMapGenericConverter implements GenericConverter {
@@ -20,13 +18,13 @@ final class MapToMapGenericConverter implements GenericConverter {
 		Map sourceMap = (Map) source;
 		TypeDescriptor targetKeyType = targetType.getMapKeyTypeDescriptor();
 		TypeDescriptor targetValueType = targetType.getMapValueTypeDescriptor();
-		if (targetKeyType == null && targetValueType == null) {
+		if (targetKeyType == TypeDescriptor.NULL && targetValueType == TypeDescriptor.NULL) {
 			return compatibleMapWithoutEntryConversion(sourceMap, targetType);
 		}
 		TypeDescriptor[] sourceEntryTypes = getMapEntryTypes(sourceMap);
 		TypeDescriptor sourceKeyType = sourceEntryTypes[0];
 		TypeDescriptor sourceValueType = sourceEntryTypes[1];
-		if (sourceKeyType == null && sourceValueType == null) {
+		if (sourceKeyType == TypeDescriptor.NULL && sourceValueType == TypeDescriptor.NULL) {
 			return compatibleMapWithoutEntryConversion(sourceMap, targetType);
 		}
 		boolean keysCompatible = false;
@@ -44,7 +42,9 @@ final class MapToMapGenericConverter implements GenericConverter {
 		MapEntryConverter converter = new MapEntryConverter(sourceKeyType, sourceValueType, targetKeyType, targetValueType, keysCompatible, valuesCompatible, conversionService);
 		for (Object entry : sourceMap.entrySet()) {
 			Map.Entry sourceMapEntry = (Map.Entry) entry;
-			targetMap.put(converter.convertKey(sourceMapEntry.getKey()), converter.convertValue(sourceMapEntry.getValue()));
+			Object targetKey = converter.convertKey(sourceMapEntry.getKey());
+			Object targetValue = converter.convertValue(sourceMapEntry.getValue()); 
+			targetMap.put(targetKey, targetValue);
 		}
 		return targetMap;
 	}
@@ -79,57 +79,4 @@ final class MapToMapGenericConverter implements GenericConverter {
 		}
 	}
 
-	private static class MapEntryConverter {
-
-		private GenericConverter keyConverter;
-
-		private GenericConverter valueConverter;
-
-		private TypeDescriptor sourceKeyType;
-
-		private TypeDescriptor sourceValueType;
-		
-		private TypeDescriptor targetKeyType;
-		
-		private TypeDescriptor targetValueType;
-
-		public MapEntryConverter(TypeDescriptor sourceKeyType, TypeDescriptor sourceValueType, TypeDescriptor targetKeyType,
-				TypeDescriptor targetValueType, boolean keysCompatible, boolean valuesCompatible,
-				GenericConversionService conversionService) {
-			if (sourceKeyType != TypeDescriptor.NULL && targetKeyType != TypeDescriptor.NULL && !keysCompatible) {
-				this.keyConverter = conversionService.getConverter(sourceKeyType, targetKeyType);
-				if (this.keyConverter == null) {
-					throw new ConverterNotFoundException(sourceKeyType, targetKeyType);
-				}				
-				this.sourceKeyType = sourceKeyType;
-				this.targetKeyType = targetKeyType;
-			}
-			if (sourceValueType != TypeDescriptor.NULL && targetValueType != TypeDescriptor.NULL && !valuesCompatible) {
-				this.valueConverter = conversionService.getConverter(sourceValueType, targetValueType);
-				if (this.valueConverter == null) {
-					throw new ConverterNotFoundException(sourceValueType, targetValueType);
-				}				
-				this.targetKeyType = targetKeyType;
-				this.targetValueType = targetValueType;
-			}
-		}
-
-		public Object convertKey(Object sourceKey) {
-			if (sourceKey != null && this.keyConverter != null) {
-				return invokeConverter(this.keyConverter, sourceKey, this.sourceKeyType, this.targetKeyType);
-			} else {
-				return sourceKey;
-			}
-		}
-
-		public Object convertValue(Object sourceValue) {
-			if (sourceValue != null && this.valueConverter != null) {
-				return invokeConverter(this.valueConverter, sourceValue, this.sourceValueType, this.targetValueType);
-			} else {
-				return sourceValue;
-			}
-		}
-
-	}
-
 }

org.springframework.core/src/main/java/org/springframework/core/convert/support/StringArrayToMapGenericConverter.java

@@ -0,0 +1,84 @@
+/*
+ * Copyright 2002-2009 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.core.convert.support;
+
+import java.lang.reflect.Array;
+import java.util.Map;
+
+import org.springframework.core.CollectionFactory;
+import org.springframework.core.convert.TypeDescriptor;
+
+final class StringArrayToMapGenericConverter implements GenericConverter {
+
+	private final GenericConversionService conversionService;
+
+	public StringArrayToMapGenericConverter(GenericConversionService conversionService) {
+		this.conversionService = conversionService;
+	}
+
+	public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
+		TypeDescriptor targetKeyType = targetType.getMapKeyTypeDescriptor();
+		TypeDescriptor targetValueType = targetType.getMapValueTypeDescriptor();
+		if (targetKeyType == TypeDescriptor.NULL && targetValueType == TypeDescriptor.NULL) {
+			return mapWithoutConversion(source, targetType);
+		}
+		TypeDescriptor sourceElementType = sourceType.getElementTypeDescriptor();
+		boolean keysCompatible = false;
+		if (sourceElementType.isAssignableTo(targetKeyType)) {
+			keysCompatible = true;
+		}
+		boolean valuesCompatible = false;
+		if (sourceElementType.isAssignableTo(targetValueType)) {
+			valuesCompatible = true;
+		}
+		if (keysCompatible && valuesCompatible) {
+			return mapWithoutConversion(source, targetType);
+		}
+		int length = Array.getLength(source);
+		Map target = CollectionFactory.createMap(targetType.getType(), length);
+		MapEntryConverter converter = new MapEntryConverter(sourceElementType, sourceElementType, targetKeyType, targetValueType, keysCompatible, valuesCompatible, conversionService);		
+		for (int i = 0; i < length; i++) {
+			String property = (String) Array.get(source, i);
+			String[] fields = property.split("=");
+			if (fields.length < 2) {
+				throw new IllegalArgumentException("Invalid String property '" + property
+						+ "'; properties should be in the format name=value");
+			}
+			Object targetKey = converter.convertKey(fields[0]);
+			Object targetValue = converter.convertValue(fields[1]);
+			target.put(targetKey, targetValue);
+		}
+		return target;
+	}
+
+	private Map mapWithoutConversion(Object source, TypeDescriptor targetType) {
+		int length = Array.getLength(source);
+		Map target = CollectionFactory.createMap(targetType.getType(), length);
+		for (int i = 0; i < length; i++) {
+			String property = (String) Array.get(source, i);
+			String[] fields = property.split("=");
+			if (fields.length < 2) {
+				throw new IllegalArgumentException("Invalid String property '" + property
+						+ "'; properties should be in the format name=value");
+			}
+			String key = fields[0];
+			String value = fields[1];
+			target.put(key, value);
+		}
+		return target;
+	}
+
+}

org.springframework.core/src/main/java/org/springframework/core/convert/support/StringToMapGenericConverter.java

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2002-2009 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.core.convert.support;
+
+import org.springframework.core.convert.TypeDescriptor;
+
+final class StringToMapGenericConverter implements GenericConverter {
+
+	private final StringArrayToMapGenericConverter converter;
+	
+	public StringToMapGenericConverter(GenericConversionService conversionService) {
+		this.converter = new StringArrayToMapGenericConverter(conversionService);
+	}
+
+	public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
+		String string = (String) source;
+		String[] properties = string.split(" ");
+		return this.converter.convert(properties, TypeDescriptor.valueOf(String[].class), targetType);
+	}
+
+}

org.springframework.core/src/test/java/org/springframework/core/convert/support/GenericConversionServiceTests.java

@@ -206,7 +206,7 @@ public class GenericConversionServiceTests {
 		String result = conversionService.convert(new String[0], String.class);
 		assertEquals("", result);
 	}
-	
+
 	@Test
 	public void convertArrayToObject() {
 		Object[] array = new Object[] { 3L };
@@ -272,7 +272,8 @@ public class GenericConversionServiceTests {
 	public void convertCollectionToStringWithElementConversion() throws Exception {
 		conversionService.addConverter(new ObjectToStringConverter());
 		List<Integer> list = Arrays.asList(new Integer[] { 3, 5 });
-		String result = (String) conversionService.convert(list, new TypeDescriptor(getClass().getField("genericList")), TypeDescriptor.valueOf(String.class));
+		String result = (String) conversionService.convert(list,
+				new TypeDescriptor(getClass().getField("genericList")), TypeDescriptor.valueOf(String.class));
 		assertEquals("3,5", result);
 	}
 
@@ -302,8 +303,8 @@ public class GenericConversionServiceTests {
 		conversionService.addConverterFactory(new StringToEnumConverterFactory());
 		Map<String, FooEnum> map = (Map<String, FooEnum>) conversionService.convert(foo, TypeDescriptor
 				.valueOf(Map.class), new TypeDescriptor(getClass().getField("genericMap")));
-		assertEquals(map.get(1), FooEnum.BAR);
-		assertEquals(map.get(2), FooEnum.BAZ);
+		assertEquals(FooEnum.BAR, map.get(1));
+		assertEquals(FooEnum.BAZ, map.get(2));
 	}
 
 	@Test
@@ -346,7 +347,8 @@ public class GenericConversionServiceTests {
 	@Test
 	public void convertStringToCollectionWithElementConversion() throws Exception {
 		conversionService.addConverterFactory(new StringToNumberConverterFactory());
-		List result = (List) conversionService.convert("1,2,3", TypeDescriptor.valueOf(String.class), new TypeDescriptor(getClass().getField("genericList")));
+		List result = (List) conversionService.convert("1,2,3", TypeDescriptor.valueOf(String.class),
+				new TypeDescriptor(getClass().getField("genericList")));
 		assertEquals(3, result.size());
 		assertEquals(new Integer(1), result.get(0));
 		assertEquals(new Integer(2), result.get(1));
@@ -391,6 +393,42 @@ public class GenericConversionServiceTests {
 		assertEquals(new Integer(3), result[0]);
 	}
 
+	@Test
+	public void convertStringArrayToMap() {
+		Map result = conversionService.convert(new String[] { "foo=bar", "bar=baz", "baz=boop" }, Map.class);
+		assertEquals("bar", result.get("foo"));
+		assertEquals("baz", result.get("bar"));
+		assertEquals("boop", result.get("baz"));
+	}
+
+	@Test
+	public void convertStringArrayToMapWithElementConversion() throws Exception {
+		conversionService.addConverterFactory(new StringToNumberConverterFactory());		
+		conversionService.addConverterFactory(new StringToEnumConverterFactory());		
+		Map result = (Map) conversionService.convert(new String[] { "1=BAR", "2=BAZ" }, TypeDescriptor
+				.valueOf(String[].class), new TypeDescriptor(getClass().getField("genericMap")));
+		assertEquals(FooEnum.BAR, result.get(1));
+		assertEquals(FooEnum.BAZ, result.get(2));
+	}
+
+	@Test
+	public void convertStringToMap() {
+		Map result = conversionService.convert("foo=bar bar=baz baz=boop", Map.class);
+		assertEquals("bar", result.get("foo"));
+		assertEquals("baz", result.get("bar"));
+		assertEquals("boop", result.get("baz"));
+	}
+
+	@Test
+	public void convertStringToMapWithElementConversion() throws Exception {
+		conversionService.addConverterFactory(new StringToNumberConverterFactory());		
+		conversionService.addConverterFactory(new StringToEnumConverterFactory());		
+		Map result = (Map) conversionService.convert("1=BAR 2=BAZ", TypeDescriptor
+				.valueOf(String.class), new TypeDescriptor(getClass().getField("genericMap")));
+		assertEquals(FooEnum.BAR, result.get(1));
+		assertEquals(FooEnum.BAZ, result.get(2));
+	}
+
 	@Test
 	public void genericConverterDelegatingBackToConversionServiceConverterNotFound() {
 		try {