| /* |
| * 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 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.avalon.framework.thread.ThreadSafe; |
| 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.matching.PreparableMatcher; |
| import org.apache.cocoon.sitemap.PatternException; |
| |
| import java.util.Map; |
| |
| /** |
| * |
| * @author <a href="mailto:sylvain@apache.org">Sylvain Wallez</a> |
| * @version CVS $Id$ |
| */ |
| public class PreparableMatchNode extends SimpleSelectorProcessingNode |
| implements ParameterizableProcessingNode, Composable, Disposable { |
| |
| /** The 'pattern' attribute */ |
| private String pattern; |
| |
| /** The 'name' for the variable anchor */ |
| private String name; |
| |
| private Object preparedPattern; |
| |
| private Map parameters; |
| |
| /** The matcher, if it's ThreadSafe */ |
| private PreparableMatcher threadSafeMatcher; |
| |
| protected ComponentManager manager; |
| |
| public PreparableMatchNode(String type, String 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; |
| setSelector((ComponentSelector)manager.lookup(Matcher.ROLE + "Selector")); |
| |
| // Prepare the pattern, and keep matcher if ThreadSafe |
| PreparableMatcher matcher = (PreparableMatcher)selector.select(componentName); |
| |
| if (matcher instanceof ThreadSafe) { |
| this.threadSafeMatcher = matcher; |
| } |
| |
| try { |
| this.preparedPattern = matcher.preparePattern(this.pattern); |
| |
| } catch(PatternException pe) { |
| String msg = "Invalid pattern '" + this.pattern + "' for matcher at " + this.getLocation(); |
| throw new ComponentException(null, msg, pe); |
| |
| } finally { |
| if (this.threadSafeMatcher == null) { |
| selector.release(matcher); |
| } |
| } |
| } |
| |
| public final boolean invoke(Environment env, InvokeContext context) |
| throws Exception { |
| |
| // Perform any common invoke functionality |
| super.invoke(env, context); |
| |
| Map objectModel = env.getObjectModel(); |
| 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.preparedMatch(preparedPattern, objectModel, resolvedParams); |
| |
| } else { |
| // Get matcher from selector |
| PreparableMatcher matcher = (PreparableMatcher)this.selector.select(this.componentName); |
| try { |
| result = matcher.preparedMatch(preparedPattern, objectModel, resolvedParams); |
| |
| } finally { |
| this.selector.release(matcher); |
| } |
| } |
| |
| if (result != null) { |
| if (getLogger().isDebugEnabled()) { |
| getLogger().debug("Matcher '" + this.componentName + "' matched prepared 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() { |
| if (this.threadSafeMatcher != null) { |
| selector.release(this.threadSafeMatcher); |
| this.threadSafeMatcher = null; |
| } |
| if (this.selector != null) { |
| this.manager.release(this.selector); |
| this.selector = null; |
| } |
| this.manager = null; |
| } |
| } |