| /* |
| * 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 java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.avalon.framework.configuration.Configuration; |
| import org.apache.avalon.framework.configuration.ConfigurationException; |
| import org.apache.avalon.framework.service.ServiceSelector; |
| import org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNodeBuilder; |
| import org.apache.cocoon.components.treeprocessor.ProcessingNode; |
| import org.apache.cocoon.components.treeprocessor.variables.VariableResolver; |
| import org.apache.cocoon.components.treeprocessor.variables.VariableResolverFactory; |
| import org.apache.cocoon.selection.Selector; |
| import org.apache.cocoon.selection.SwitchSelector; |
| |
| /** |
| * |
| * @version $Id$ |
| */ |
| public class SelectNodeBuilder extends AbstractParentProcessingNodeBuilder { |
| |
| public ProcessingNode buildNode(Configuration config) throws Exception { |
| |
| String type = this.treeBuilder.getTypeForStatement(config, Selector.ROLE); |
| |
| // Lists of ProcessingNode[] and test resolvers for each "when" |
| List whenChildren = new ArrayList(); |
| List whenTests = new ArrayList(); |
| |
| // Nodes for otherwise (if any) |
| ProcessingNode[] otherwiseNodes = null; |
| |
| Configuration[] childrenConfig = config.getChildren(); |
| for (int i = 0; i < childrenConfig.length; i++) { |
| |
| Configuration childConfig = childrenConfig[i]; |
| String name = childConfig.getName(); |
| |
| if ("when".equals(name)) { |
| |
| checkNamespace(childConfig); |
| whenTests.add( |
| VariableResolverFactory.getResolver(childConfig.getAttribute("test"), this.manager) |
| ); |
| whenChildren.add(buildChildNodes(childConfig)); |
| |
| } else if ("otherwise".equals(name)) { |
| |
| checkNamespace(childConfig); |
| if (otherwiseNodes != null) { |
| String msg = "Duplicate " + name + " (only one is allowed) at " + childConfig.getLocation(); |
| getLogger().error(msg); |
| throw new ConfigurationException(msg); |
| } |
| |
| otherwiseNodes = buildChildNodes(childConfig); |
| |
| } else if (isParameter(childConfig)) { |
| // ignore it. It is handled automatically in setupNode() |
| |
| } else { |
| // Unknown element |
| String msg = "Unknown element '" + name + "' in select at " + childConfig.getLocation(); |
| throw new ConfigurationException(msg); |
| } |
| } |
| |
| ProcessingNode[][] whenChildrenNodes = (ProcessingNode[][])whenChildren.toArray(new ProcessingNode[0][0]); |
| VariableResolver[] whenResolvers = (VariableResolver[])whenTests.toArray(new VariableResolver[whenTests.size()]); |
| |
| // Get the type and class for this selector |
| ServiceSelector compSelector = (ServiceSelector)this.manager.lookup(Selector.ROLE + "Selector"); |
| |
| Class clazz = null; |
| try { |
| // Find selector class |
| Selector selector = (Selector)compSelector.select(type); |
| try { |
| clazz = selector.getClass(); |
| } finally { |
| compSelector.release(selector); |
| } |
| } finally { |
| this.manager.release(compSelector); |
| } |
| |
| if (SwitchSelector.class.isAssignableFrom(clazz)) { |
| SwitchSelectNode node = new SwitchSelectNode(type); |
| this.treeBuilder.setupNode(node, config); |
| node.setCases(whenChildrenNodes, whenResolvers, otherwiseNodes); |
| return node; |
| } |
| SelectNode node = new SelectNode(type); |
| this.treeBuilder.setupNode(node, config); |
| node.setCases(whenChildrenNodes, whenResolvers, otherwiseNodes); |
| return node; |
| } |
| } |