switchgenerator.java

bpel执行引擎用来执行bpel业务流程

/*
 * 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.ode.bpel.compiler;

import org.apache.ode.bpel.compiler.bom.Activity;
import org.apache.ode.bpel.compiler.bom.SwitchActivity;
import org.apache.ode.bpel.o.OActivity;
import org.apache.ode.bpel.o.OSwitch;

/**
 * Generator for legacy BPEL 1.1 <code>&lt;switch&gt;</code> actiivty.
 * @author Maciej Szefler - m s z e f l e r @ g m a i l . c o m
 *
 */
public class SwitchGenerator extends DefaultActivityGenerator {
  public OActivity newInstance(Activity src) {
        return new OSwitch(_context.getOProcess(), _context.getCurrent());
  }

  public void compile(OActivity output, Activity src) {
    OSwitch oswitch = (OSwitch) output;
    SwitchActivity switchDef = (SwitchActivity)src;

    for (SwitchActivity.Case ccase : switchDef.getCases()) {
      OSwitch.OCase ocase = new OSwitch.OCase(_context.getOProcess());
      ocase.activity = _context.compile(ccase.getActivity());
      ocase.expression = (ccase.getCondition() == null ? _context.constantExpr(true) : _context.compileExpr(ccase.getCondition()));
      oswitch.addCase(ocase);
    }
  }
}