/* * 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.tuscany.sca.implementation.das.provider; import java.lang.reflect.InvocationTargetException; import org.apache.tuscany.sca.data.engine.DataAccessEngine; import org.apache.tuscany.sca.interfacedef.Operation; import org.apache.tuscany.sca.invocation.Invoker; import org.apache.tuscany.sca.invocation.Message; /** * Implements a target invoker for DAS component implementations. * * The target invoker is responsible for dispatching invocations to the particular * component implementation logic. The current component implementation will * dispatch calls to the DAS APIs to retrieve the requested data from the back-end store * * @version $Rev$ $Date$ */ public class DASInvoker implements Invoker { private final Operation operation; private final DataAccessEngine dataAccessEngine; public DASInvoker(Operation operation, DataAccessEngine dataAccessEngine) { this.operation = operation; this.dataAccessEngine = dataAccessEngine; } public Message invoke(Message msg) { try { Object[] args = msg.getBody(); Object resp = doTheWork(args); msg.setBody(resp); } catch (InvocationTargetException e) { msg.setFaultBody(e.getCause()); } return msg; } public Object doTheWork(Object[] args) throws InvocationTargetException { //check annotation // try { // Method methodDeclaration = this.getClass().getMethod(operation.getName(), null); // methodDeclaration.getAnnotation(org.apache.tuscany.sca.implementation.das.annotations.Command.class); // } catch (Exception e) { // //ignore // } //check if static way if (operation.getName().equals("executeCommand")) { String commandName, xPath; //simple execute command by name if( args.length == 1){ commandName = (String) args[0]; return this.dataAccessEngine.executeCommand(commandName); } else { commandName = (String) args[0]; xPath = (String) args[1]; return this.dataAccessEngine.executeCommand(commandName, xPath); } } else { // dynamic mapping to command return this.dataAccessEngine.executeCommand(operation.getName()); } } }