mapping exclusions

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

@@ -50,4 +50,9 @@ public interface MappingConfiguration {
 	 */
 	MappingConfiguration setGenericConverter(GenericConverter converter);
 
+	/**
+	 * Configures that this mapping should be excluded (ignored and not executed).
+	 */
+	void setExclude();
+
 }

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

@@ -122,7 +122,7 @@ public class SpelMapper implements Mapper<Object, Object> {
 	 * @param nestedMapper the nested mapper
 	 */
 	public void addNestedMapper(Mapper<?, ?> nestedMapper) {
-		Class[] typeInfo = getRequiredTypeInfo(nestedMapper);
+		Class<?>[] typeInfo = getRequiredTypeInfo(nestedMapper);
 		addNestedMapper(typeInfo[0], typeInfo[1], nestedMapper);
 	}
 
@@ -132,7 +132,7 @@ public class SpelMapper implements Mapper<Object, Object> {
 	 * @param targetType the target nested property type
 	 * @param nestedMapper the nested mapper
 	 */
-	public void addNestedMapper(Class sourceType, Class targetType, Mapper<?, ?> nestedMapper) {
+	public void addNestedMapper(Class<?> sourceType, Class<?> targetType, Mapper<?, ?> nestedMapper) {
 		this.conversionService.addGenericConverter(sourceType, targetType, new MapperConverter(nestedMapper));
 	}
 

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

@@ -38,18 +38,14 @@ class SpelMapping implements MappingConfiguration {
 
 	private GenericConverter converter;
 
+	private boolean exclude;
+
 	public SpelMapping(Expression source, Expression target) {
 		this.source = source;
 		this.target = target;
 	}
 
-	public String getSourceExpressionString() {
-		return this.source.getExpressionString();
-	}
-
-	public String getTargetExpressionString() {
-		return this.target.getExpressionString();
-	}
+	// implementing MappingConfiguration
 
 	public MappingConfiguration setConverter(Converter<?, ?> converter) {
 		return setGenericConverter(new ConverterGenericConverter(converter));
@@ -64,8 +60,25 @@ class SpelMapping implements MappingConfiguration {
 		return this;
 	}
 
+	public void setExclude() {
+		this.exclude = true;
+	}
+
+	// public methods
+
+	public String getSourceExpressionString() {
+		return this.source.getExpressionString();
+	}
+
+	public String getTargetExpressionString() {
+		return this.target.getExpressionString();
+	}
+
 	public void map(EvaluationContext sourceContext, EvaluationContext targetContext,
 			Collection<MappingFailure> failures) {
+		if (exclude) {
+			return;
+		}
 		try {
 			Object value = this.source.getValue(sourceContext);
 			if (this.converter != null) {