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/*
* 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.script.provider;
import javax.script.Invocable;
import javax.script.ScriptEngine;
import javax.script.ScriptException;
import org.apache.axiom.om.OMElement;
import org.apache.bsf.xml.XMLHelper;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.invocation.Invoker;
import org.apache.tuscany.sca.invocation.Message;
/**
* Perform the actual script invocation
*
* @version $Rev$ $Date$
*/
public class ScriptInvoker implements Invoker {
private ScriptEngine scriptEngine;
private XMLHelper xmlHelper;
private Operation operation;
public ScriptInvoker(ScriptEngine scriptEngine, XMLHelper xmlHelper, Operation operation) {
this.scriptEngine = scriptEngine;
this.xmlHelper = xmlHelper;
this.operation = operation;
}
private Object doInvoke(Object[] objects, Operation op) throws ScriptException {
if (xmlHelper != null) {
objects[0] = xmlHelper.toScriptXML((OMElement)objects[0]);
}
Operation oper = operation; // static setting
if (oper.getName() == null) { // if no static setting
oper = op; // use dynamic setting
}
Object response;
try {
response = ((Invocable)scriptEngine).invokeFunction(oper.getName(), objects);
} catch (ScriptException e) {
throw e;
} catch (Exception e) {
throw new ScriptException(e);
}
if (xmlHelper != null) {
response = xmlHelper.toOMElement(response);
}
return response;
}
public Message invoke(Message msg) {
try {
Object resp = doInvoke((Object[])msg.getBody(), msg.getOperation());
msg.setBody(resp);
} catch (ScriptException e) {
msg.setFaultBody(e.getCause());
}
return msg;
}
}
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