| /* |
| * 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.configuration.Configurable; |
| import org.apache.avalon.framework.configuration.Configuration; |
| import org.apache.avalon.framework.configuration.ConfigurationException; |
| import org.apache.cocoon.components.flow.Interpreter; |
| import org.apache.cocoon.components.treeprocessor.AbstractProcessingNodeBuilder; |
| import org.apache.cocoon.components.treeprocessor.CategoryNode; |
| import org.apache.cocoon.components.treeprocessor.CategoryNodeBuilder; |
| import org.apache.cocoon.components.treeprocessor.LinkedProcessingNodeBuilder; |
| import org.apache.cocoon.components.treeprocessor.ProcessingNode; |
| import org.apache.cocoon.components.treeprocessor.variables.VariableResolverFactory; |
| |
| /** |
| * |
| * @author <a href="mailto:sylvain@apache.org">Sylvain Wallez</a> |
| * @author <a href="mailto:ovidiu@apache.org">Ovidiu Predescu</a> |
| * @version CVS $Id$ |
| */ |
| public class CallNodeBuilder extends AbstractProcessingNodeBuilder |
| implements LinkedProcessingNodeBuilder { |
| |
| protected ProcessingNode node; |
| protected String resourceName; |
| protected String functionName; |
| protected String continuationId; |
| |
| public ProcessingNode buildNode(Configuration config) |
| throws Exception { |
| resourceName = config.getAttribute("resource", null); |
| functionName = config.getAttribute("function", null); |
| continuationId = config.getAttribute("continuation", null); |
| |
| if (resourceName == null) { |
| // Building a CallFunction node |
| if (functionName == null && continuationId == null) { |
| throw new ConfigurationException( |
| "<map:call> must have either a 'resource', 'function' or 'continuation' attribute, at " + |
| config.getLocation()); |
| } |
| |
| node = new CallFunctionNode( |
| VariableResolverFactory.getResolver(functionName, this.manager), |
| VariableResolverFactory.getResolver(continuationId, this.manager) |
| ); |
| |
| } else { |
| // Building a Call(Resource)Node |
| if (functionName != null || continuationId != null) { |
| throw new ConfigurationException( |
| "<map:call> cannot have both a 'resource' and a 'function' or 'continuation' attribute, at " |
| + config.getLocation() |
| ); |
| } |
| node = new CallNode(); |
| } |
| |
| this.treeBuilder.setupNode(this.node, config); |
| if (node instanceof Configurable) { |
| ((Configurable)this.node).configure(config); |
| } |
| |
| return this.node; |
| } |
| |
| public void linkNode() throws Exception { |
| if (resourceName != null) { |
| // We have a <map:call resource="..."/> |
| CategoryNode resources |
| = CategoryNodeBuilder.getCategoryNode(treeBuilder, "resources"); |
| |
| if (resources == null) |
| throw new ConfigurationException("This sitemap contains no resources. Cannot call at " + node.getLocation()); |
| |
| ((CallNode)this.node).setResource(resources, this.resourceName); |
| } |
| else { |
| // We have a <map:call> with either "function" or |
| // "continuation", or both specified |
| |
| // Check to see if a flow has been defined in this sitemap |
| FlowNode flow = (FlowNode)treeBuilder.getRegisteredNode("flow"); |
| if (flow == null) |
| throw new ConfigurationException("This sitemap contains no control flows defined, cannot call at " + node.getLocation() + ". Define a control flow using <map:flow>, with embedded <map:script> elements."); |
| |
| // Get the Interpreter instance and set it up in the |
| // CallFunctionNode function |
| Interpreter interpreter = flow.getInterpreter(); |
| ((CallFunctionNode)node).setInterpreter(interpreter); |
| } |
| } |
| } |