| /* |
| * 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.sitemap; |
| |
| import org.apache.avalon.framework.configuration.Configuration; |
| import org.apache.avalon.framework.configuration.ConfigurationException; |
| import org.apache.avalon.framework.container.ContainerUtil; |
| import org.apache.avalon.framework.service.ServiceException; |
| import org.apache.cocoon.core.container.DefaultServiceSelector; |
| import org.apache.cocoon.generation.GeneratorFactory; |
| import org.apache.cocoon.serialization.SerializerFactory; |
| import org.apache.cocoon.transformation.TransformerFactory; |
| |
| /** |
| * Component selector for sitemap components. |
| * |
| * @version $Id$ |
| */ |
| public class ComponentsSelector extends DefaultServiceSelector { |
| |
| private static final int UNKNOWN = -1; |
| private static final int GENERATOR = 0; |
| private static final int TRANSFORMER = 1; |
| private static final int SERIALIZER = 2; |
| |
| /** Configuration element names, used to find the role */ |
| private static final String[] CONFIG_NAMES = { |
| "generators", |
| "transformers", |
| "serializers", |
| "readers", |
| "matchers", |
| "selectors", |
| "actions", |
| "pipes" |
| }; |
| |
| /** Names of children elements, according to role */ |
| private static final String[] COMPONENT_NAMES = { |
| "generator", |
| "transformer", |
| "serializer", |
| "reader", |
| "matcher", |
| "selector", |
| "action", |
| "pipe" |
| }; |
| |
| /** The role as an integer */ |
| private int roleId; |
| |
| /** |
| * Return the component instance name according to the selector role |
| * (e.g. "action" for "org.apache.cocoon.acting.Action"). |
| */ |
| protected String getComponentInstanceName() { |
| return COMPONENT_NAMES[this.roleId]; |
| } |
| |
| /** |
| * Get the attribute for class names. This is "src" for known roles, and |
| * "class" (the default) for other roles. |
| */ |
| protected String getClassAttributeName() { |
| return "src"; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.apache.avalon.framework.configuration.Configurable#configure(org.apache.avalon.framework.configuration.Configuration) |
| */ |
| public void configure(Configuration config) throws ConfigurationException { |
| // Who are we ? |
| final String configName = config.getName(); |
| this.roleId = UNKNOWN; // unknown |
| for (int i = 0; i < CONFIG_NAMES.length; i++) { |
| if (CONFIG_NAMES[i].equals(configName)) { |
| this.roleId = i; |
| break; |
| } |
| } |
| |
| if (this.roleId == UNKNOWN) { |
| throw new ConfigurationException("ComponentsSelector is reserved for sitemap components. Illegal use at " + |
| config.getLocation()); |
| } |
| |
| super.configure(config); |
| } |
| |
| /** |
| * Override parent to implement support for {@link GeneratorFactory}, |
| * {@link TransformerFactory}, and {@link SerializerFactory}. |
| */ |
| public Object select(Object hint) throws ServiceException { |
| final Object component = super.select(hint); |
| |
| switch (this.roleId) { |
| case GENERATOR: |
| if (component instanceof GeneratorFactory) { |
| return ((GeneratorFactory)component).getInstance(); |
| } |
| break; |
| case TRANSFORMER: |
| if (component instanceof TransformerFactory) { |
| return ((TransformerFactory)component).getInstance(); |
| } |
| break; |
| case SERIALIZER: |
| if (component instanceof SerializerFactory) { |
| return ((SerializerFactory)component).getInstance(); |
| } |
| break; |
| } |
| |
| return component; |
| } |
| |
| /** |
| * Override parent to implement support for {@link GeneratorFactory}, |
| * {@link TransformerFactory}, and {@link SerializerFactory}. |
| */ |
| public void release(Object component) { |
| |
| // If component is an Instance returned by Factory, get the Factory. |
| switch (this.roleId) { |
| case GENERATOR: |
| if (component instanceof GeneratorFactory.Instance) { |
| // Dispose component, if needed |
| ContainerUtil.dispose(component); |
| component = ((GeneratorFactory.Instance)component).getFactory(); |
| } |
| break; |
| case TRANSFORMER: |
| if (component instanceof TransformerFactory.Instance) { |
| // Dispose component, if needed |
| ContainerUtil.dispose(component); |
| component = ((TransformerFactory.Instance)component).getFactory(); |
| } |
| break; |
| case SERIALIZER: |
| if (component instanceof SerializerFactory.Instance) { |
| // Dispose component, if needed |
| ContainerUtil.dispose(component); |
| component = ((SerializerFactory.Instance)component).getFactory(); |
| } |
| break; |
| } |
| |
| super.release(component); |
| } |
| } |