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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.container.python;
import java.util.Map;
import org.python.core.Py;
import org.python.core.PyObject;
import org.python.core.PySystemState;
import org.python.util.PythonInterpreter;
/**
* JythonScript represents a compiled Jython script
*/
public class PythonScript {
protected String moduleName;
protected String className;
protected String script;
protected Class iface;
protected ClassLoader classLoader;
private PyObject pythonClass;
/**
* Create a new RhinoInvoker.
*
* @param scriptName
* the name of the script. Can be anything, only used in messages to identify the script
* @param script
* the complete script
* @param context
* name-value pairs that are added in to the scope where the script is compiled. May be null. The value objects are made available to
* the script by using a variable with the name.
* @param classLoader
* the ClassLoader Rhino should use to locate any user Java classes used in the script
*/
public PythonScript(String moduleName, String className, String script, ClassLoader classLoader) {
this.moduleName = moduleName;
this.className = className;
this.script = script;
this.classLoader = classLoader;
}
private void initScript(String moduleName, String className, String script) {
PythonInterpreter interpreter = new PythonInterpreter();
PySystemState sys = Py.getSystemState();
PySystemState.add_package(iface.getPackage().getName(), null);
sys.setClassLoader(classLoader);
interpreter.exec(script);
pythonClass = interpreter.get(className);
if (pythonClass == null) {
throw new RuntimeException("No callable (class or function) " + "named " + className + " in " + moduleName);
}
}
/**
* Create a new invokeable instance of the script
*
* @param context
* objects to add to scope of the script instance
* @return a RhinoScriptInstance
*/
public Object createInstance(Map<String, Object> context) {
initScript(moduleName, className, script);
PyObject instance = pythonClass.__call__();
Object o = instance.__tojava__(iface);
if (o == Py.NoConversion) {
throw new RuntimeException("The value from " + className + " must extend " + iface.getName());
}
return o;
}
public String getModuleName() {
return moduleName;
}
public String getClassName() {
return className;
}
public String getScript() {
return script;
}
public ClassLoader getClassLoader() {
return classLoader;
}
public void setServiceInterface(Class iface) {
this.iface = iface;
}
}
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