/*
* 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.cocoon.components.treeprocessor.sitemap;
import java.util.Map;
import org.apache.avalon.framework.activity.Disposable;
import org.apache.avalon.framework.component.ComponentException;
import org.apache.avalon.framework.component.ComponentManager;
import org.apache.avalon.framework.component.ComponentSelector;
import org.apache.avalon.framework.component.Composable;
import org.apache.avalon.framework.parameters.Parameters;
import org.apache.cocoon.components.treeprocessor.InvokeContext;
import org.apache.cocoon.components.treeprocessor.ParameterizableProcessingNode;
import org.apache.cocoon.components.treeprocessor.SimpleSelectorProcessingNode;
import org.apache.cocoon.components.treeprocessor.variables.VariableResolver;
import org.apache.cocoon.environment.Environment;
import org.apache.cocoon.matching.Matcher;
import org.apache.cocoon.sitemap.PatternException;
/**
*
* @author <a href="mailto:sylvain@apache.org">Sylvain Wallez</a>
* @version CVS $Id: MatchNode.java 433543 2006-08-22 06:22:54Z crossley $
*/
public class MatchNode extends SimpleSelectorProcessingNode
implements ParameterizableProcessingNode, Composable, Disposable {
/** The 'pattern' attribute */
private VariableResolver pattern;
/** The 'name' for the variable anchor */
private String name;
/** The matcher, if it's ThreadSafe */
private Matcher threadSafeMatcher;
private Map parameters;
private ComponentManager manager;
public MatchNode(String type, VariableResolver pattern, String name) throws PatternException {
super(type);
this.pattern = pattern;
this.name = name;
}
public void setParameters(Map parameterMap) {
this.parameters = parameterMap;
}
public void compose(ComponentManager manager) throws ComponentException {
this.manager = manager;
this.setSelector((ComponentSelector)manager.lookup(Matcher.ROLE + "Selector"));
// Get matcher if it's ThreadSafe
this.threadSafeMatcher = (Matcher)this.getThreadSafeComponent();
}
public final boolean invoke(Environment env, InvokeContext context)
throws Exception {
// Perform any common invoke functionality
super.invoke(env, context);
Map objectModel = env.getObjectModel();
String resolvedPattern = pattern.resolve(context, objectModel);
Parameters resolvedParams = VariableResolver.buildParameters(this.parameters, context, objectModel);
Map result = null;
if (this.threadSafeMatcher != null) {
// Avoid select() and try/catch block (faster !)
result = this.threadSafeMatcher.match(resolvedPattern, objectModel, resolvedParams);
} else {
// Get matcher from selector
Matcher matcher = (Matcher)this.selector.select(this.componentName);
try {
result = matcher.match(resolvedPattern, objectModel, resolvedParams);
} finally {
this.selector.release(matcher);
}
}
if (result != null) {
if (getLogger().isDebugEnabled()) {
getLogger().debug("Matcher '" + this.componentName + "' matched pattern '" + this.pattern +
"' at " + this.getLocation());
}
// Invoke children with the matcher results
return this.invokeNodes(children, env, context, name, result);
} else {
// Matcher failed
return false;
}
}
/**
* Disposable Interface
*/
public void dispose() {
this.manager.release(this.selector);
}
}