/**
* 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.topology.xml;
import org.apache.commons.digester3.Rule;
import org.apache.commons.digester3.binder.AbstractRulesModule;
import org.apache.hadoop.gateway.topology.Param;
import org.apache.hadoop.gateway.topology.Provider;
import org.apache.hadoop.gateway.topology.Service;
import org.apache.hadoop.gateway.topology.builder.BeanPropertyTopologyBuilder;
import org.xml.sax.Attributes;
public class KnoxFormatXmlTopologyRules extends AbstractRulesModule {
private static final String ROOT_TAG = "topology";
private static final String NAME_TAG = "name";
private static final String VERSION_TAG = "version";
private static final String SERVICE_TAG = "service";
private static final String ROLE_TAG = "role";
private static final String URL_TAG = "url";
private static final String PROVIDER_TAG = "gateway/provider";
private static final String ENABLED_TAG = "enabled";
private static final String PARAM_TAG = "param";
private static final String VALUE_TAG = "value";
private static final Rule paramRule = new ParamRule();
@Override
protected void configure() {
forPattern( ROOT_TAG ).createObject().ofType( BeanPropertyTopologyBuilder.class );
forPattern( ROOT_TAG + "/" + NAME_TAG ).callMethod("name").usingElementBodyAsArgument();
forPattern( ROOT_TAG + "/" + VERSION_TAG ).callMethod("version").usingElementBodyAsArgument();
forPattern( ROOT_TAG + "/" + SERVICE_TAG ).createObject().ofType( Service.class ).then().setNext( "addService" );
forPattern( ROOT_TAG + "/" + SERVICE_TAG + "/" + ROLE_TAG ).setBeanProperty();
forPattern( ROOT_TAG + "/" + SERVICE_TAG + "/" + NAME_TAG ).setBeanProperty();
forPattern( ROOT_TAG + "/" + SERVICE_TAG + "/" + URL_TAG ).callMethod( "addUrl" ).usingElementBodyAsArgument();
forPattern( ROOT_TAG + "/" + SERVICE_TAG + "/" + PARAM_TAG ).createObject().ofType( Param.class ).then().addRule( paramRule ).then().setNext( "addParam" );
forPattern( ROOT_TAG + "/" + SERVICE_TAG + "/" + PARAM_TAG + "/" + NAME_TAG ).setBeanProperty();
forPattern( ROOT_TAG + "/" + SERVICE_TAG + "/" + PARAM_TAG + "/" + VALUE_TAG ).setBeanProperty();
forPattern( ROOT_TAG + "/" + PROVIDER_TAG ).createObject().ofType( Provider.class ).then().setNext( "addProvider" );
forPattern( ROOT_TAG + "/" + PROVIDER_TAG + "/" + ROLE_TAG ).setBeanProperty();
forPattern( ROOT_TAG + "/" + PROVIDER_TAG + "/" + ENABLED_TAG ).setBeanProperty();
forPattern( ROOT_TAG + "/" + PROVIDER_TAG + "/" + NAME_TAG ).setBeanProperty();
forPattern( ROOT_TAG + "/" + PROVIDER_TAG + "/" + PARAM_TAG ).createObject().ofType( Param.class ).then().addRule( paramRule ).then().setNext( "addParam" );
forPattern( ROOT_TAG + "/" + PROVIDER_TAG + "/" + PARAM_TAG + "/" + NAME_TAG ).setBeanProperty();
forPattern( ROOT_TAG + "/" + PROVIDER_TAG + "/" + PARAM_TAG + "/" + VALUE_TAG ).setBeanProperty();
}
private static class ParamRule extends Rule {
@Override
public void begin( String namespace, String name, Attributes attributes ) {
Param param = getDigester().peek();
String paramName = attributes.getValue( "name" );
if( paramName != null ) {
param.setName( paramName );
param.setValue( attributes.getValue( "value" ) );
}
}
}
}