// Copyright 2004, 2005 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.hivemind.lib.groovy;
import groovy.lang.Binding;
import groovy.lang.GroovyCodeSource;
import groovy.lang.GroovyShell;
import groovy.lang.Script;
import java.io.IOException;
import javax.xml.parsers.SAXParser;
import org.apache.hivemind.ApplicationRuntimeException;
import org.apache.hivemind.ClassResolver;
import org.apache.hivemind.ErrorHandler;
import org.apache.hivemind.Resource;
import org.apache.hivemind.parse.DescriptorParser;
import org.apache.hivemind.parse.ModuleDescriptor;
import org.apache.hivemind.parse.XmlResourceProcessor;
import org.xml.sax.SAXException;
/**
* This extension of the {@link org.apache.hivemind.parse.XmlResourceProcessor}is suitable for
* processing Groovy scripts and is used internally by {@link GroovyModuleDescriptorProvider}.
*
* @see org.apache.hivemind.lib.groovy.GroovyModuleDescriptorProvider
* @author Knut Wannheden
* @since 1.1
*/
class GroovyScriptProcessor extends XmlResourceProcessor
{
private GroovyShell _groovyShell;
public GroovyScriptProcessor(ClassResolver resolver, ErrorHandler errorHandler)
{
super(resolver, errorHandler);
}
protected ModuleDescriptor parseResource(Resource resource, SAXParser parser,
DescriptorParser contentHandler) throws SAXException, IOException
{
HiveMindBuilder builder = new HiveMindBuilder(contentHandler);
GroovyCodeSource source = new GroovyCodeSource(resource.getResourceURL());
Script script;
try
{
script = getGroovyShell().parse(source);
}
catch (Exception e)
{
throw new ApplicationRuntimeException(e);
}
Binding processorBinding = new Binding();
processorBinding.setVariable("processor", builder);
script.setBinding(processorBinding);
script.run();
return contentHandler.getModuleDescriptor();
}
private GroovyShell getGroovyShell()
{
if (_groovyShell == null)
_groovyShell = new GroovyShell(_resolver.getClassLoader());
return _groovyShell;
}
}