/*
* 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.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: CallNodeBuilder.java,v 1.3 2004/03/05 13:02:51 bdelacretaz Exp $
*/
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);
}
}
}