@Event/ResourceMapping uniquely mapped to through event/resource id, even across controllers (SPR-6062); type-level @RequestMapping header conditions validated in Portlet environments as well

org.springframework.web.portlet/src/main/java/org/springframework/web/portlet/bind/annotation/EventMapping.java

@@ -34,30 +34,19 @@ import org.springframework.web.bind.annotation.Mapping;
 @Target({ElementType.METHOD})
 @Retention(RetentionPolicy.RUNTIME)
 @Documented
-@Mapping
+@Mapping()
 public @interface EventMapping {
 
 	/**
 	 * The name of the event to be handled.
+	 * This name uniquely identifies an event within a portlet mode.
 	 * <p>Typically the local name of the event, but fully qualified names
 	 * with a "{...}" namespace part will be mapped correctly as well.
-	 * <p>If not specified, the render method will be invoked for any
+	 * <p>If not specified, the handler method will be invoked for any
 	 * event request within its general mapping.
 	 * @see javax.portlet.EventRequest#getEvent()
 	 * @see javax.portlet.Event#getName()
 	 */
-	String value();
+	String value() default "";
-
-	/**
-	 * The parameters of the mapped request, narrowing the primary mapping.
-	 * <p>Same format for any environment: a sequence of "myParam=myValue" style
-	 * expressions, with a request only mapped if each such parameter is found
-	 * to have the given value. "myParam" style expressions are also supported,
-	 * with such parameters having to be present in the request (allowed to have
-	 * any value). Finally, "!myParam" style expressions indicate that the
-	 * specified parameter is <i>not</i> supposed to be present in the request.
-	 * @see org.springframework.web.bind.annotation.RequestMapping#params()
-	 */
-	String[] params() default {};
 
 }

org.springframework.web.portlet/src/main/java/org/springframework/web/portlet/bind/annotation/ResourceMapping.java

@@ -34,27 +34,16 @@ import org.springframework.web.bind.annotation.Mapping;
 @Target({ElementType.METHOD})
 @Retention(RetentionPolicy.RUNTIME)
 @Documented
-@Mapping
+@Mapping()
 public @interface ResourceMapping {
 
 	/**
 	 * The id of the resource to be handled.
-	 * <p>If not specified, the render method will be invoked for any
+	 * This id uniquely identifies a resource within a portlet mode.
+	 * <p>If not specified, the handler method will be invoked for any
 	 * resource request within its general mapping.
 	 * @see javax.portlet.ResourceRequest#getResourceID()
 	 */
 	String value() default "";
 
-	/**
-	 * The parameters of the mapped request, narrowing the primary mapping.
-	 * <p>Same format for any environment: a sequence of "myParam=myValue" style
-	 * expressions, with a request only mapped if each such parameter is found
-	 * to have the given value. "myParam" style expressions are also supported,
-	 * with such parameters having to be present in the request (allowed to have
-	 * any value). Finally, "!myParam" style expressions indicate that the
-	 * specified parameter is <i>not</i> supposed to be present in the request.
-	 * @see org.springframework.web.bind.annotation.RequestMapping#params()
-	 */
-	String[] params() default {};
-
 }

org.springframework.web.portlet/src/main/java/org/springframework/web/portlet/mvc/annotation/AnnotationMethodHandlerAdapter.java

@@ -385,13 +385,14 @@ public class AnnotationMethodHandlerAdapter extends PortletContentGenerator impl
 				mappingInfo.initPhaseMapping(PortletRequest.RENDER_PHASE, renderMapping.value(), renderMapping.params());
 			}
 			if (resourceMapping != null) {
-				mappingInfo.initPhaseMapping(PortletRequest.RESOURCE_PHASE, resourceMapping.value(), resourceMapping.params());
+				mappingInfo.initPhaseMapping(PortletRequest.RESOURCE_PHASE, resourceMapping.value(), new String[0]);
 			}
 			if (eventMapping != null) {
-				mappingInfo.initPhaseMapping(PortletRequest.EVENT_PHASE, eventMapping.value(), eventMapping.params());
+				mappingInfo.initPhaseMapping(PortletRequest.EVENT_PHASE, eventMapping.value(), new String[0]);
 			}
 			if (requestMapping != null) {
-				mappingInfo.initStandardMapping(requestMapping.value(), requestMapping.method(), requestMapping.params());
+				mappingInfo.initStandardMapping(requestMapping.value(), requestMapping.method(),
+						requestMapping.params(), requestMapping.headers());
 				if (mappingInfo.phase == null) {
 					mappingInfo.phase = determineDefaultPhase(method);
 				}
@@ -466,19 +467,21 @@ public class AnnotationMethodHandlerAdapter extends PortletContentGenerator impl
 	}
 
 
-	private static class RequestMappingInfo  {
+	private static class RequestMappingInfo {
 
-		public Set<PortletMode> modes = new HashSet<PortletMode>();
+		public final Set<PortletMode> modes = new HashSet<PortletMode>();
 
 		public String phase;
 
 		public String value;
 
-		public Set<String> methods = new HashSet<String>();
+		public final Set<String> methods = new HashSet<String>();
 
 		public String[] params = new String[0];
 
-		public void initStandardMapping(String[] modes, RequestMethod[] methods, String[] params) {
+		public String[] headers = new String[0];
+
+		public void initStandardMapping(String[] modes, RequestMethod[] methods, String[] params, String[] headers) {
 			for (String mode : modes) {
 				this.modes.add(new PortletMode(mode));
 			}
@@ -486,6 +489,7 @@ public class AnnotationMethodHandlerAdapter extends PortletContentGenerator impl
 				this.methods.add(method.name());
 			}
 			this.params = StringUtils.mergeStringArrays(this.params, params);
+			this.headers = StringUtils.mergeStringArrays(this.headers, headers);
 		}
 
 		public void initPhaseMapping(String phase, String value, String[] params) {
@@ -527,7 +531,8 @@ public class AnnotationMethodHandlerAdapter extends PortletContentGenerator impl
 				}
 			}
 			return PortletAnnotationMappingUtils.checkRequestMethod(this.methods, request) &&
-					PortletAnnotationMappingUtils.checkParameters(this.params, request);
+					PortletAnnotationMappingUtils.checkParameters(this.params, request) &&
+					PortletAnnotationMappingUtils.checkHeaders(this.headers, request);
 		}
 
 		public boolean isBetterMatchThan(RequestMappingInfo other) {
@@ -545,7 +550,8 @@ public class AnnotationMethodHandlerAdapter extends PortletContentGenerator impl
 					ObjectUtils.nullSafeEquals(this.phase, other.phase) &&
 					ObjectUtils.nullSafeEquals(this.value, other.value) &&
 					this.methods.equals(other.methods) &&
-					Arrays.equals(this.params, other.params));
+					Arrays.equals(this.params, other.params) &&
+					Arrays.equals(this.headers, other.headers));
 		}
 
 		@Override

org.springframework.web.portlet/src/main/java/org/springframework/web/portlet/mvc/annotation/DefaultAnnotationHandlerMapping.java

@@ -18,12 +18,18 @@ package org.springframework.web.portlet.mvc.annotation;
 
 import java.lang.annotation.Annotation;
 import java.lang.reflect.Method;
+import java.util.Arrays;
+import java.util.HashMap;
 import java.util.HashSet;
+import java.util.Map;
 import java.util.Set;
 import javax.portlet.ClientDataRequest;
+import javax.portlet.Event;
+import javax.portlet.EventRequest;
 import javax.portlet.PortletException;
 import javax.portlet.PortletMode;
 import javax.portlet.PortletRequest;
+import javax.portlet.ResourceRequest;
 
 import org.springframework.beans.BeansException;
 import org.springframework.context.ApplicationContext;
@@ -34,6 +40,9 @@ import org.springframework.util.StringUtils;
 import org.springframework.web.bind.annotation.Mapping;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.portlet.bind.PortletRequestBindingException;
+import org.springframework.web.portlet.bind.annotation.EventMapping;
+import org.springframework.web.portlet.bind.annotation.ResourceMapping;
 import org.springframework.web.portlet.handler.AbstractMapBasedHandlerMapping;
 import org.springframework.web.portlet.handler.PortletRequestMethodNotSupportedException;
 
@@ -64,10 +73,10 @@ import org.springframework.web.portlet.handler.PortletRequestMethodNotSupportedE
  * at the method level.
  *
  * <p><b>NOTE:</b> Method-level mappings are only allowed to narrow the mapping
- * expressed at the class level (if any). Portlet modes need to uniquely map onto
+ * expressed at the class level (if any). A portlet mode in combination with specific
- * specific handler beans, with any given portlet mode only allowed to be mapped
+ * parameter conditions needs to uniquely map onto one specific handler bean,
- * onto one specific handler bean (not spread across multiple handler beans).
+ * not spread across multiple handler beans. It is strongly recommended to
- * It is strongly recommended to co-locate related handler methods into the same bean.
+ * co-locate related handler methods into the same bean.
  *
  * <p>The {@link AnnotationMethodHandlerAdapter} is responsible for processing
  * annotated handler methods, as mapped by this HandlerMapping. For
@@ -81,6 +90,9 @@ import org.springframework.web.portlet.handler.PortletRequestMethodNotSupportedE
  */
 public class DefaultAnnotationHandlerMapping extends AbstractMapBasedHandlerMapping<PortletMode> {
 
+	private final Map<Class, RequestMapping> cachedMappings = new HashMap<Class, RequestMapping>();
+
+
 	/**
 	 * Calls the <code>registerHandlers</code> method in addition
 	 * to the superclass's initialization.
@@ -103,15 +115,17 @@ public class DefaultAnnotationHandlerMapping extends AbstractMapBasedHandlerMapp
 			Class<?> handlerType = context.getType(beanName);
 			RequestMapping mapping = context.findAnnotationOnBean(beanName, RequestMapping.class);
 			if (mapping != null) {
+				// @RequestMapping found at type level
+				this.cachedMappings.put(handlerType, mapping);
 				String[] modeKeys = mapping.value();
 				String[] params = mapping.params();
-				RequestMethod[] methods = mapping.method();
 				boolean registerHandlerType = true;
 				if (modeKeys.length == 0 || params.length == 0) {
 					registerHandlerType = !detectHandlerMethods(handlerType, beanName, mapping);
 				}
 				if (registerHandlerType) {
-					ParameterMappingPredicate predicate = new ParameterMappingPredicate(params, methods);
+					ParameterMappingPredicate predicate = new ParameterMappingPredicate(
+							params, mapping.headers(), mapping.method());
 					for (String modeKey : modeKeys) {
 						registerHandler(new PortletMode(modeKey), beanName, predicate);
 					}
@@ -138,14 +152,28 @@ public class DefaultAnnotationHandlerMapping extends AbstractMapBasedHandlerMapp
 				boolean mappingFound = false;
 				String[] modeKeys = new String[0];
 				String[] params = new String[0];
+				String resourceId = null;
+				String eventName = null;
 				for (Annotation ann : method.getAnnotations()) {
 					if (AnnotationUtils.findAnnotation(ann.getClass(), Mapping.class) != null) {
 						mappingFound = true;
 						if (ann instanceof RequestMapping) {
-							modeKeys = (String[]) AnnotationUtils.getValue(ann);
+							RequestMapping rm = (RequestMapping) ann;
+							modeKeys = rm.value();
+							params = StringUtils.mergeStringArrays(params, rm.params());
+						}
+						else if (ann instanceof ResourceMapping) {
+							ResourceMapping rm = (ResourceMapping) ann;
+							resourceId = rm.value();
+						}
+						else if (ann instanceof EventMapping) {
+							EventMapping em = (EventMapping) ann;
+							eventName = em.value();
+						}
+						else {
+							String[] specificParams = (String[]) AnnotationUtils.getValue(ann, "params");
+							params = StringUtils.mergeStringArrays(params, specificParams);
 						}
-						String[] specificParams = (String[]) AnnotationUtils.getValue(ann, "params");
-						params = StringUtils.mergeStringArrays(params, specificParams);
 					}
 				}
 				if (mappingFound) {
@@ -155,14 +183,26 @@ public class DefaultAnnotationHandlerMapping extends AbstractMapBasedHandlerMapp
 						}
 						else {
 							throw new IllegalStateException(
-									"No portlet mode mappings specified - neither at type nor method level");
+									"No portlet mode mappings specified - neither at type nor at method level");
 						}
 					}
 					if (typeMapping != null) {
-						PortletAnnotationMappingUtils.validateModeMapping(modeKeys, typeMapping.value());
+						if (!PortletAnnotationMappingUtils.validateModeMapping(modeKeys, typeMapping.value())) {
+							throw new IllegalStateException("Mode mappings conflict between method and type level: " +
+									Arrays.asList(modeKeys) + " versus " + Arrays.asList(typeMapping.value()));
+						}
 						params = StringUtils.mergeStringArrays(typeMapping.params(), params);
 					}
-					ParameterMappingPredicate predicate = new ParameterMappingPredicate(params);
+					PortletRequestMappingPredicate predicate;
+					if (resourceId != null) {
+						predicate = new ResourceMappingPredicate(resourceId);
+					}
+					else if (eventName != null) {
+						predicate = new EventMappingPredicate(eventName);
+					}
+					else {
+						predicate = new ParameterMappingPredicate(params);
+					}
 					for (String modeKey : modeKeys) {
 						registerHandler(new PortletMode(modeKey), beanName, predicate);
 						handlersRegistered.add(Boolean.TRUE);
@@ -181,6 +221,50 @@ public class DefaultAnnotationHandlerMapping extends AbstractMapBasedHandlerMapp
 		return request.getPortletMode();
 	}
 
+	/**
+	 * Validate the given annotated handler against the current request.
+	 * @see #validateMapping
+	 */
+	protected void validateHandler(Object handler, PortletRequest request) throws Exception {
+		RequestMapping mapping = this.cachedMappings.get(handler.getClass());
+		if (mapping == null) {
+			mapping = AnnotationUtils.findAnnotation(handler.getClass(), RequestMapping.class);
+		}
+		if (mapping != null) {
+			validateMapping(mapping, request);
+		}
+	}
+
+	/**
+	 * Validate the given type-level mapping metadata against the current request,
+	 * checking HTTP request method and parameter conditions.
+	 * @param mapping the mapping metadata to validate
+	 * @param request current HTTP request
+	 * @throws Exception if validation failed
+	 */
+	protected void validateMapping(RequestMapping mapping, PortletRequest request) throws Exception {
+		RequestMethod[] mappedMethods = mapping.method();
+		if (!PortletAnnotationMappingUtils.checkRequestMethod(mappedMethods, request)) {
+			String[] supportedMethods = new String[mappedMethods.length];
+			for (int i = 0; i < mappedMethods.length; i++) {
+				supportedMethods[i] = mappedMethods[i].name();
+			}
+			if (request instanceof ClientDataRequest) {
+				throw new PortletRequestMethodNotSupportedException(((ClientDataRequest) request).getMethod(), supportedMethods);
+			}
+			else {
+				throw new PortletRequestMethodNotSupportedException(supportedMethods);
+			}
+		}
+
+		String[] mappedHeaders = mapping.headers();
+		if (!PortletAnnotationMappingUtils.checkHeaders(mappedHeaders, request)) {
+			throw new PortletRequestBindingException("Header conditions \"" +
+					StringUtils.arrayToDelimitedString(mappedHeaders, ", ") +
+					"\" not met for actual request");
+		}
+	}
+
 
 	/**
 	 * Predicate that matches against parameter conditions.
@@ -189,16 +273,21 @@ public class DefaultAnnotationHandlerMapping extends AbstractMapBasedHandlerMapp
 
 		private final String[] params;
 
+		private final String[] headers;
+
 		private final Set<String> methods = new HashSet<String>();
 
 		public ParameterMappingPredicate(String[] params) {
-			this.params = params;
+			this(params, null, null);
 		}
 
-		public ParameterMappingPredicate(String[] params, RequestMethod[] methods) {
+		public ParameterMappingPredicate(String[] params, String[] headers, RequestMethod[] methods) {
 			this.params = params;
-			for (RequestMethod method : methods) {
+			this.headers = headers;
-				this.methods.add(method.name());
+			if (methods != null) {
+				for (RequestMethod method : methods) {
+					this.methods.add(method.name());
+				}
 			}
 		}
 
@@ -207,6 +296,12 @@ public class DefaultAnnotationHandlerMapping extends AbstractMapBasedHandlerMapp
 		}
 
 		public void validate(PortletRequest request) throws PortletException {
+			if (!PortletAnnotationMappingUtils.checkHeaders(this.headers, request)) {
+				throw new PortletRequestBindingException("Header conditions \"" +
+						StringUtils.arrayToDelimitedString(this.headers, ", ") +
+						"\" not met for actual request");
+			}
+
 			if (!this.methods.isEmpty()) {
 				if (!(request instanceof ClientDataRequest)) {
 					throw new PortletRequestMethodNotSupportedException(StringUtils.toStringArray(this.methods));
@@ -219,11 +314,11 @@ public class DefaultAnnotationHandlerMapping extends AbstractMapBasedHandlerMapp
 		}
 
 		public int compareTo(Object other) {
-			if (other instanceof PortletRequestMappingPredicate) {
+			if (other instanceof ParameterMappingPredicate) {
 				return new Integer(((ParameterMappingPredicate) other).params.length).compareTo(this.params.length);
 			}
 			else {
-				return 0;
+				return 1;
 			}
 		}
 
@@ -233,4 +328,54 @@ public class DefaultAnnotationHandlerMapping extends AbstractMapBasedHandlerMapp
 		}
 	}
 
+
+	private static class ResourceMappingPredicate implements PortletRequestMappingPredicate {
+
+		private final String resourceId;
+
+		public ResourceMappingPredicate(String resourceId) {
+			this.resourceId = resourceId;
+		}
+
+		public boolean match(PortletRequest request) {
+			return (PortletRequest.RESOURCE_PHASE.equals(request.getAttribute(PortletRequest.LIFECYCLE_PHASE)) &&
+					("".equals(this.resourceId) || this.resourceId.equals(((ResourceRequest) request).getResourceID())));
+		}
+
+		public void validate(PortletRequest request) {
+		}
+
+		public int compareTo(Object o) {
+			return -1;
+		}
+	}
+
+
+	private static class EventMappingPredicate implements PortletRequestMappingPredicate {
+
+		private final String eventName;
+
+		public EventMappingPredicate(String eventName) {
+			this.eventName = eventName;
+		}
+
+		public boolean match(PortletRequest request) {
+			if (!PortletRequest.EVENT_PHASE.equals(request.getAttribute(PortletRequest.LIFECYCLE_PHASE))) {
+				return false;
+			}
+			if ("".equals(this.eventName)) {
+				return true;
+			}
+			Event event = ((EventRequest) request).getEvent();
+			return (this.eventName.equals(event.getName()) || this.eventName.equals(event.getQName().toString()));
+		}
+
+		public void validate(PortletRequest request) {
+		}
+
+		public int compareTo(Object o) {
+			return -1;
+		}
+	}
+
 }

org.springframework.web.portlet/src/main/java/org/springframework/web/portlet/mvc/annotation/PortletAnnotationMappingUtils.java

@@ -16,11 +16,15 @@
 
 package org.springframework.web.portlet.mvc.annotation;
 
+import java.util.Iterator;
+import java.util.List;
 import java.util.Set;
 import javax.portlet.ClientDataRequest;
 import javax.portlet.PortletRequest;
 
+import org.springframework.http.MediaType;
 import org.springframework.util.ObjectUtils;
+import org.springframework.web.bind.annotation.RequestMethod;
 import org.springframework.web.portlet.util.PortletUtils;
 
 /**
@@ -37,7 +41,7 @@ abstract class PortletAnnotationMappingUtils {
 	 * @param typeLevelModes the type-level mode mappings to check against
 	 */
 	public static boolean validateModeMapping(String[] modes, String[] typeLevelModes) {
-		if (!ObjectUtils.isEmpty(modes)) {
+		if (!ObjectUtils.isEmpty(modes) && !ObjectUtils.isEmpty(typeLevelModes)) {
 			for (String mode : modes) {
 				boolean match = false;
 				for (String typeLevelMode : typeLevelModes) {
@@ -53,6 +57,27 @@ abstract class PortletAnnotationMappingUtils {
 		return true;
 	}
 
+	/**
+	 * Check whether the given request matches the specified request methods.
+	 * @param methods the request methods to check against
+	 * @param request the current request to check
+	 */
+	public static boolean checkRequestMethod(RequestMethod[] methods, PortletRequest request) {
+		if (methods.length == 0) {
+			return true;
+		}
+		if (!(request instanceof ClientDataRequest)) {
+			return false;
+		}
+		String method = ((ClientDataRequest) request).getMethod();
+		for (RequestMethod candidate : methods) {
+			if (method.equals(candidate.name())) {
+				return true;
+			}
+		}
+		return false;
+	}
+
 	/**
 	 * Check whether the given request matches the specified request methods.
 	 * @param methods the request methods to check against
@@ -103,4 +128,57 @@ abstract class PortletAnnotationMappingUtils {
 		return true;
 	}
 
+	/**
+	 * Check whether the given request matches the specified header conditions.
+	 * @param headers the header conditions, following {@link RequestMapping#headers()}
+	 * @param request the current HTTP request to check
+	 */
+	public static boolean checkHeaders(String[] headers, PortletRequest request) {
+		if (!ObjectUtils.isEmpty(headers)) {
+			for (String header : headers) {
+				int separator = header.indexOf('=');
+				if (separator == -1) {
+					if (header.startsWith("!")) {
+						if (request.getProperty(header.substring(1)) != null) {
+							return false;
+						}
+					}
+					else if (request.getProperty(header) == null) {
+						return false;
+					}
+				}
+				else {
+					String key = header.substring(0, separator);
+					String value = header.substring(separator + 1);
+					if (isMediaTypeHeader(key)) {
+						List<MediaType> requestMediaTypes = MediaType.parseMediaTypes(request.getProperty(key));
+						List<MediaType> valueMediaTypes = MediaType.parseMediaTypes(value);
+						boolean found = false;
+						for (Iterator<MediaType> valIter = valueMediaTypes.iterator(); valIter.hasNext() && !found;) {
+							MediaType valueMediaType = valIter.next();
+							for (Iterator<MediaType> reqIter = requestMediaTypes.iterator(); reqIter.hasNext() && !found;) {
+								MediaType requestMediaType = reqIter.next();
+								if (valueMediaType.includes(requestMediaType)) {
+									found = true;
+								}
+							}
+
+						}
+						if (!found) {
+							return false;
+						}
+					}
+					else if (!value.equals(request.getProperty(key))) {
+						return false;
+					}
+				}
+			}
+		}
+		return true;
+	}
+
+	private static boolean isMediaTypeHeader(String headerName) {
+		return "Accept".equalsIgnoreCase(headerName) || "Content-Type".equalsIgnoreCase(headerName);
+	}
+
 }

org.springframework.web.portlet/src/test/java/org/springframework/web/portlet/mvc/annotation/Portlet20AnnotationControllerTests.java

@@ -474,6 +474,7 @@ public class Portlet20AnnotationControllerTests {
 				RootBeanDefinition bd = new RootBeanDefinition(MyPortlet20DispatchingController.class);
 				bd.setScope(WebApplicationContext.SCOPE_REQUEST);
 				wac.registerBeanDefinition("controller", bd);
+				wac.registerBeanDefinition("controller2", new RootBeanDefinition(DetailsController.class));
 				AnnotationConfigUtils.registerAnnotationConfigProcessors(wac);
 				wac.refresh();
 				return wac;
@@ -543,6 +544,88 @@ public class Portlet20AnnotationControllerTests {
 		assertEquals("myDefaultResource", resourceResponse.getContentAsString());
 	}
 
+	@Test
+	public void eventDispatchingController() throws Exception {
+		DispatcherPortlet portlet = new DispatcherPortlet() {
+			protected ApplicationContext createPortletApplicationContext(ApplicationContext parent) throws BeansException {
+				StaticPortletApplicationContext wac = new StaticPortletApplicationContext();
+				wac.setPortletContext(new MockPortletContext());
+				RootBeanDefinition bd = new RootBeanDefinition(MyPortlet20DispatchingController.class);
+				bd.setScope(WebApplicationContext.SCOPE_REQUEST);
+				wac.registerBeanDefinition("controller", bd);
+				wac.registerBeanDefinition("controller2", new RootBeanDefinition(DetailsController.class));
+				AnnotationConfigUtils.registerAnnotationConfigProcessors(wac);
+				wac.refresh();
+				return wac;
+			}
+		};
+		portlet.init(new MockPortletConfig());
+
+		MockRenderRequest request = new MockRenderRequest();
+		MockRenderResponse response = new MockRenderResponse();
+		portlet.render(request, response);
+		assertEquals("myView", response.getContentAsString());
+
+		MockActionRequest actionRequest = new MockActionRequest("this");
+		MockActionResponse actionResponse = new MockActionResponse();
+		portlet.processAction(actionRequest, actionResponse);
+
+		request = new MockRenderRequest(PortletMode.VIEW, WindowState.MAXIMIZED);
+		request.setParameters(actionResponse.getRenderParameterMap());
+		response = new MockRenderResponse();
+		portlet.render(request, response);
+		assertEquals("myLargeView-value", response.getContentAsString());
+
+		actionRequest = new MockActionRequest();
+		actionRequest.addParameter("action", "details");
+		actionResponse = new MockActionResponse();
+		portlet.processAction(actionRequest, actionResponse);
+
+		request = new MockRenderRequest(PortletMode.VIEW, WindowState.MAXIMIZED);
+		request.setParameters(actionResponse.getRenderParameterMap());
+		response = new MockRenderResponse();
+		portlet.render(request, response);
+		assertEquals("myLargeView-details", response.getContentAsString());
+
+		MockEventRequest eventRequest = new MockEventRequest(new MockEvent("event1"));
+		eventRequest.setParameters(actionRequest.getParameterMap());
+		MockEventResponse eventResponse = new MockEventResponse();
+		portlet.processEvent(eventRequest, eventResponse);
+
+		request = new MockRenderRequest(PortletMode.VIEW, WindowState.MAXIMIZED);
+		request.setParameters(eventResponse.getRenderParameterMap());
+		response = new MockRenderResponse();
+		portlet.render(request, response);
+		assertEquals("myLargeView-value3", response.getContentAsString());
+
+		eventRequest = new MockEventRequest(new MockEvent("event3"));
+		eventRequest.setParameters(actionRequest.getParameterMap());
+		eventResponse = new MockEventResponse();
+		portlet.processEvent(eventRequest, eventResponse);
+
+		request = new MockRenderRequest(PortletMode.VIEW, WindowState.MAXIMIZED);
+		request.setParameters(eventResponse.getRenderParameterMap());
+		response = new MockRenderResponse();
+		portlet.render(request, response);
+		assertEquals("myLargeView-value4", response.getContentAsString());
+
+		request = new MockRenderRequest(PortletMode.VIEW, WindowState.NORMAL);
+		request.setParameters(actionResponse.getRenderParameterMap());
+		response = new MockRenderResponse();
+		portlet.render(request, response);
+		assertEquals("myView", response.getContentAsString());
+
+		MockResourceRequest resourceRequest = new MockResourceRequest("resource1");
+		MockResourceResponse resourceResponse = new MockResourceResponse();
+		portlet.serveResource(resourceRequest, resourceResponse);
+		assertEquals("myResource", resourceResponse.getContentAsString());
+
+		resourceRequest = new MockResourceRequest("resource2");
+		resourceResponse = new MockResourceResponse();
+		portlet.serveResource(resourceRequest, resourceResponse);
+		assertEquals("myDefaultResource", resourceResponse.getContentAsString());
+	}
+
 
 	/*
 	 * Controllers
@@ -916,6 +999,22 @@ public class Portlet20AnnotationControllerTests {
 		public void myResource(Writer writer) throws IOException {
 			writer.write("myResource");
 		}
+	}
+
+
+	@Controller
+	@RequestMapping("VIEW")
+	private static class DetailsController {
+
+		@EventMapping("event3")
+		public void myHandle2(EventResponse response) throws IOException {
+			response.setRenderParameter("test", "value4");
+		}
+
+		@ActionMapping(params = "action=details")
+		public void renderDetails(ActionRequest request, ActionResponse response, Model model) {
+			response.setRenderParameter("test", "details");
+	    }
 
 		@ResourceMapping
 		public void myDefaultResource(Writer writer) throws IOException {

org.springframework.web/src/main/java/org/springframework/web/bind/annotation/RequestMapping.java

@@ -28,11 +28,13 @@ import java.lang.annotation.Target;
  * environments, with the semantics adapting to the concrete environment.
  *
  * <p><b>NOTE:</b> Method-level mappings are only allowed to narrow the mapping
- * expressed at the class level (if any). HTTP paths / portlet modes need to
+ * expressed at the class level (if any). In the Servlet case, an HTTP path needs to
- * uniquely map onto specific handler beans, with any given path / mode only
+ * uniquely map onto one specific handler bean (not spread across multiple handler beans);
- * allowed to be mapped onto one specific handler bean (not spread across
+ * the remaining mapping parameters and conditions are effectively assertions only.
- * multiple handler beans). It is strongly recommended to co-locate related
+ * In the Portlet case, a portlet mode in combination with specific parameter conditions
- * handler methods into the same bean.
+ * needs to uniquely map onto one specific handler bean, with all conditions evaluated
+ * for mapping purposes. It is strongly recommended to co-locate related handler methods
+ * into the same bean and therefore keep the mappings simple and intuitive.
  *
  * <p>Handler methods which are annotated with this annotation are allowed
  * to have very flexible signatures. They may have arguments of the following
@@ -256,7 +258,10 @@ public @interface RequestMapping {
 	 * When used at the type level, all method-level mappings inherit
 	 * this header restriction (i.e. the type-level restriction
 	 * gets checked before the handler method is even resolved).
+	 * <p>Maps against HttpServletRequest headers in a Servlet environment,
+	 * and against PortletRequest properties in a Portlet 2.0 environment.
 	 * @see org.springframework.http.MediaType
 	 */
 	String[] headers() default {}; 
+
 }