Added serialize config

src/groovy/org/grails/plugins/marshallers/ActionConfigBuilder.groovy

@@ -0,0 +1,12 @@
+package org.grails.plugins.marshallers
+
+public class ActionConfigBuilder{
+	def config=[:]
+	def methodMissing(String name,args){
+		if(args.size()==1 && args[0] instanceof Closure){
+			config[name]=args[0]
+		}else{
+			throw new IllegalStateException('Illegal syntax encountered while building serializers config: '+ name)
+		}
+	}
+}

src/groovy/org/grails/plugins/marshallers/GenericDomainClassXMLMarshaller.groovy

@@ -82,8 +82,14 @@ class GenericDomainClassXMLMarshaller implements ObjectMarshaller<XML>,NameAware
 
 		for (GrailsDomainClassProperty property : properties) {
 			if(!isIn(mc,'ignore',property.getName()) && !isIn(mc,'attribute',property.getName())){
-				LOG.debug("Trying to write field as xml element: $property.name on $value")
-				writeElement(xml, property, beanWrapper,mc);
+				def serializers=mc?.serializer
+				if(serializers && serializers[property.name]){
+					Object val = beanWrapper.getPropertyValue(property.getName());
+					serializers[property.name].call(val,xml)
+				}else{
+					LOG.debug("Trying to write field as xml element: $property.name on $value")
+					writeElement(xml, property, beanWrapper,mc);
+				}
 			}
 		}
 	}
@@ -166,12 +172,10 @@ class GenericDomainClassXMLMarshaller implements ObjectMarshaller<XML>,NameAware
 	@SuppressWarnings("unused") GrailsDomainClass referencedDomainClass) throws ConverterException {
 		Object idValue;
 		if(proxyHandler instanceof EntityProxyHandler) {
-
 			idValue = ((EntityProxyHandler) proxyHandler).getProxyIdentifier(refObj);
 			if(idValue == null) {
 				idValue = new BeanWrapperImpl(refObj).getPropertyValue(idProperty.getName());
 			}
-
 		}
 		else {
 			idValue = new BeanWrapperImpl(refObj).getPropertyValue(idProperty.getName());

src/groovy/org/grails/plugins/marshallers/config/MarshallingConfigBuilder.groovy

@@ -1,30 +1,44 @@
 package org.grails.plugins.marshallers.config
 
-import java.util.Map;
+import org.grails.plugins.marshallers.ActionConfigBuilder
+
 
 
 class MarshallingConfigBuilder {
-	def static singleValueAttrs=['elementName']
+
+	def static rules=[
+		singleAttr:[
+			members:['elementName'],
+			rule:{args-> args[0] }
+		],
+		actions:[
+			members:['serializer'],
+			rule:{args->
+				ActionConfigBuilder builder=new ActionConfigBuilder();
+				def closure = args[0]
+				closure.delegate = builder
+				closure.resolveStrategy = Closure.DELEGATE_FIRST;
+				closure.call();
+				builder.config;
+			}
+		]
+	]
+
 	def config=[:];
+
 	def methodMissing(String name,args){
-		if(args.size()==1 && args[0] instanceof Closure){
+		def entry=rules.find{key,value->value.members.contains(name)};
+		if(entry!=null){
+			config[name]=entry.value.rule.call(args)
+		}else if(args.size()==1 && args[0] instanceof Closure){
 			MarshallingConfigBuilder builder=new MarshallingConfigBuilder();
 			def closure = args[0]
 			closure.delegate = builder
 			closure.resolveStrategy = Closure.DELEGATE_FIRST;
 			closure.call();
 			config[name]=builder.config;
 		}else{
-			boolean singleValue=singleValueAttrs.find {it==name}!=null;
-			if(singleValue){
-				if(args.size()==1){
-					config[name]=args[0];
-				}else{
-					throw new IllegalStateException('Illegal syntax for '+ name)
-				}
-			}else{
-				config[name]=args;
-			}
+			config[name]=args
 		}
 	}
 }

test/unit/org/grails/plugins/marshallers/config/MarshallingConfigBuilderTests.groovy

@@ -20,6 +20,9 @@ class MarshallingConfigBuilderTests extends GrailsUnitTestCase {
 			named {
 				attributes 'some', 'some1'
 				ignore 'ig', 'big'
+				serializer {
+					taxonomies {val,xml-> println val }
+				}
 			}
 		}
 		json {
@@ -43,6 +46,7 @@ class MarshallingConfigBuilderTests extends GrailsUnitTestCase {
 		println c.config;
 		assertEquals(c.getConfig('xml','default').elementName,'elName')
 		assertNull(c.getConfig('xml','named').elementName)
+		assertTrue(c.getConfig('xml','named').serializer.taxonomies instanceof Closure)
 		assertEquals(c.getConfig('xml','default').attributes.size(),2)
 		assertEquals(c.getConfig('some','default').size(),0)
 		assertEquals(c.getConfig('xml', 'some').size(),0)