| /* |
| * Copyright 1999-2004 The Apache Software Foundation. |
| * |
| * Licensed 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; |
| |
| import org.apache.avalon.framework.component.Component; |
| import org.apache.avalon.framework.component.ComponentException; |
| import org.apache.avalon.framework.component.ComponentSelector; |
| import org.apache.avalon.framework.thread.ThreadSafe; |
| |
| /** |
| * |
| * @author <a href="mailto:sylvain@apache.org">Sylvain Wallez</a> |
| * @version CVS $Id: SimpleSelectorProcessingNode.java,v 1.3 2004/03/05 13:02:51 bdelacretaz Exp $ |
| */ |
| |
| public abstract class SimpleSelectorProcessingNode extends SimpleParentProcessingNode { |
| |
| /** The node component name (e.g. action name, selector name, etc) */ |
| protected String componentName; |
| |
| /** Selector where to get components from */ |
| protected ComponentSelector selector; |
| |
| public SimpleSelectorProcessingNode(String componentName) { |
| this.componentName = componentName; |
| } |
| |
| public void setSelector(ComponentSelector selector) throws ComponentException { |
| this.selector = selector; |
| } |
| |
| /** |
| * Tests if the component designated by this node using the selector and component name |
| * is <code>ThreadSafe</code>, and return it if true. |
| * <p> |
| * Note : this method must be called <i>after</i> <code>setSelector()</code>. |
| */ |
| protected Component getThreadSafeComponent() throws ComponentException { |
| return getThreadSafeComponent(this.componentName); |
| } |
| |
| /** |
| * Tests if the component designated by this node using the selector and component name |
| * is <code>ThreadSafe</code>, and return it if true. |
| * <p> |
| * Note : this method must be called <i>after</i> <code>setSelector()</code>. |
| */ |
| protected Component getThreadSafeComponent(String name) throws ComponentException { |
| Component component = this.selector.select(name); |
| if (component instanceof ThreadSafe) { |
| return component; |
| } else { |
| this.selector.release(component); |
| return null; |
| } |
| } |
| } |