/**
* 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.hadoop.gateway.descriptor.xml;
import org.apache.commons.beanutils.MethodUtils;
import org.apache.commons.digester3.Digester;
import org.apache.commons.digester3.FactoryCreateRule;
import org.apache.commons.digester3.Rule;
import org.apache.commons.digester3.binder.AbstractRulesModule;
import org.xml.sax.Attributes;
public class XmlGatewayDescriptorRules extends AbstractRulesModule implements XmlGatewayDescriptorTags {
private static final Object[] NO_PARAMS = new Object[0];
@Override
protected void configure() {
forPattern( GATEWAY ).addRule( new FactoryCreateRule( XmlGatewayDescriptorFactory.class ) );
forPattern( GATEWAY + "/" + RESOURCE ).addRule( new AddNextRule( "addResource" ) );
forPattern( GATEWAY + "/" + RESOURCE + "/" + RESOURCE_ROLE ).callMethod( "role" ).usingElementBodyAsArgument();
forPattern( GATEWAY + "/" + RESOURCE + "/" + RESOURCE_PATTERN ).callMethod( "pattern" ).usingElementBodyAsArgument();
forPattern( GATEWAY + "/" + RESOURCE + "/" + FILTER ).addRule( new AddNextRule( "addFilter" ) );
forPattern( GATEWAY + "/" + RESOURCE + "/" + FILTER + "/" + FILTER_ROLE ).callMethod( "name" ).usingElementBodyAsArgument();
forPattern( GATEWAY + "/" + RESOURCE + "/" + FILTER + "/" + FILTER_ROLE ).callMethod( "role" ).usingElementBodyAsArgument();
forPattern( GATEWAY + "/" + RESOURCE + "/" + FILTER + "/" + FILTER_IMPL ).callMethod( "impl" ).usingElementBodyAsArgument();
forPattern( GATEWAY + "/" + RESOURCE + "/" + FILTER + "/" + FILTER_PARAM ).addRule( new AddNextRule( "param") );
forPattern( GATEWAY + "/" + RESOURCE + "/" + FILTER + "/" + FILTER_PARAM + "/" + FILTER_PARAM_NAME ).callMethod( "name" ).usingElementBodyAsArgument();
forPattern( GATEWAY + "/" + RESOURCE + "/" + FILTER + "/" + FILTER_PARAM + "/" + FILTER_PARAM_VALUE ).callMethod( "value" ).usingElementBodyAsArgument();
}
private class AddNextRule extends Rule {
private String method;
private AddNextRule( String method ) {
this.method = method;
}
@Override
public void begin( String namespace, String name, Attributes attributes ) throws Exception {
Digester digester = getDigester();
digester.push( MethodUtils.invokeMethod( digester.peek(), method, NO_PARAMS ) );
}
@Override
public void end( String namespace, String name ) {
getDigester().pop();
}
}
}