/*
* $Id$
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.struts2.dispatcher.mapper;
import com.opensymphony.xwork2.config.ConfigurationManager;
import com.opensymphony.xwork2.inject.Container;
import com.opensymphony.xwork2.inject.Inject;
import com.opensymphony.xwork2.util.logging.Logger;
import com.opensymphony.xwork2.util.logging.LoggerFactory;
import org.apache.struts2.StrutsConstants;
import javax.servlet.http.HttpServletRequest;
import java.util.LinkedList;
import java.util.List;
/**
* <!-- START SNIPPET: description -->
*
* A composite action mapper that is capable of delegating to a series of {@link ActionMapper} if the former
* failed to obtained a valid {@link ActionMapping} or uri.
*
* More details: http://struts.apache.org/2.x/docs/actionmapper.html
*
* @see ActionMapper
* @see ActionMapping
*
* @version $Date$ $Id$
*/
public class CompositeActionMapper implements ActionMapper {
private static final Logger LOG = LoggerFactory.getLogger(CompositeActionMapper.class);
protected List<ActionMapper> actionMappers = new LinkedList<ActionMapper>();
@Inject
public CompositeActionMapper(Container container,
@Inject(value = StrutsConstants.STRUTS_MAPPER_COMPOSITE) String list) {
if (list != null) {
String[] arr = list.split(",");
for (String name : arr) {
Object obj = container.getInstance(ActionMapper.class, name);
if (obj != null) {
actionMappers.add((ActionMapper) obj);
}
}
}
}
public ActionMapping getMapping(HttpServletRequest request, ConfigurationManager configManager) {
for (ActionMapper actionMapper : actionMappers) {
ActionMapping actionMapping = actionMapper.getMapping(request, configManager);
if (LOG.isDebugEnabled()) {
LOG.debug("Using ActionMapper "+actionMapper);
}
if (actionMapping == null) {
if (LOG.isDebugEnabled()) {
LOG.debug("ActionMapper "+actionMapper+" failed to return an ActionMapping (null)");
}
}
else {
return actionMapping;
}
}
if (LOG.isDebugEnabled()) {
LOG.debug("exhausted from ActionMapper that could return an ActionMapping");
}
return null;
}
public ActionMapping getMappingFromActionName(String actionName) {
for (ActionMapper actionMapper : actionMappers) {
ActionMapping actionMapping = actionMapper.getMappingFromActionName(actionName);
if (LOG.isDebugEnabled()) {
LOG.debug("Using ActionMapper "+actionMapper);
}
if (actionMapping == null) {
if (LOG.isDebugEnabled()) {
LOG.debug("ActionMapper "+actionMapper+" failed to return an ActionMapping (null)");
}
}
else {
return actionMapping;
}
}
if (LOG.isDebugEnabled()) {
LOG.debug("exhausted from ActionMapper that could return an ActionMapping");
}
return null;
}
public String getUriFromActionMapping(ActionMapping mapping) {
for (ActionMapper actionMapper : actionMappers) {
String uri = actionMapper.getUriFromActionMapping(mapping);
if (LOG.isDebugEnabled()) {
LOG.debug("Using ActionMapper "+actionMapper);
}
if (uri == null) {
if (LOG.isDebugEnabled()) {
LOG.debug("ActionMapper "+actionMapper+" failed to return an ActionMapping (null)");
}
}
else {
return uri;
}
}
if (LOG.isDebugEnabled()) {
LOG.debug("exhausted from ActionMapper that could return a uri");
}
return null;
}
}