/*
* Copyright 2002-2008 the original author or authors.
*
* Licensed 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.springframework.scripting.jruby;
import java.io.IOException;
import org.jruby.RubyException;
import org.jruby.exceptions.JumpException;
import org.jruby.exceptions.RaiseException;
import org.springframework.beans.factory.BeanClassLoaderAware;
import org.springframework.scripting.ScriptCompilationException;
import org.springframework.scripting.ScriptFactory;
import org.springframework.scripting.ScriptSource;
import org.springframework.util.Assert;
import org.springframework.util.ClassUtils;
/**
* {@link org.springframework.scripting.ScriptFactory} implementation
* for a JRuby script.
*
* <p>Typically used in combination with a
* {@link org.springframework.scripting.support.ScriptFactoryPostProcessor};
* see the latter's javadoc for a configuration example.
*
* @author Juergen Hoeller
* @author Rob Harrop
* @since 2.0
* @see JRubyScriptUtils
* @see org.springframework.scripting.support.ScriptFactoryPostProcessor
*/
public class JRubyScriptFactory implements ScriptFactory, BeanClassLoaderAware {
private final String scriptSourceLocator;
private final Class[] scriptInterfaces;
private ClassLoader beanClassLoader = ClassUtils.getDefaultClassLoader();
/**
* Create a new JRubyScriptFactory for the given script source.
* @param scriptSourceLocator a locator that points to the source of the script.
* Interpreted by the post-processor that actually creates the script.
* @param scriptInterfaces the Java interfaces that the scripted object
* is supposed to implement
*/
public JRubyScriptFactory(String scriptSourceLocator, Class[] scriptInterfaces) {
Assert.hasText(scriptSourceLocator, "'scriptSourceLocator' must not be empty");
Assert.notEmpty(scriptInterfaces, "'scriptInterfaces' must not be empty");
this.scriptSourceLocator = scriptSourceLocator;
this.scriptInterfaces = scriptInterfaces;
}
public void setBeanClassLoader(ClassLoader classLoader) {
this.beanClassLoader = classLoader;
}
public String getScriptSourceLocator() {
return this.scriptSourceLocator;
}
public Class[] getScriptInterfaces() {
return this.scriptInterfaces;
}
/**
* JRuby scripts do require a config interface.
*/
public boolean requiresConfigInterface() {
return true;
}
/**
* Load and parse the JRuby script via JRubyScriptUtils.
* @see JRubyScriptUtils#createJRubyObject(String, Class[], ClassLoader)
*/
public Object getScriptedObject(ScriptSource scriptSource, Class[] actualInterfaces)
throws IOException, ScriptCompilationException {
try {
return JRubyScriptUtils.createJRubyObject(
scriptSource.getScriptAsString(), actualInterfaces, this.beanClassLoader);
}
catch (RaiseException ex) {
RubyException rubyEx = ex.getException();
String msg = (rubyEx != null && rubyEx.message != null) ?
rubyEx.message.toString() : "Unexpected JRuby error";
throw new ScriptCompilationException(scriptSource, msg, ex);
}
catch (JumpException ex) {
throw new ScriptCompilationException(scriptSource, ex);
}
}
public Class getScriptedObjectType(ScriptSource scriptSource)
throws IOException, ScriptCompilationException {
return null;
}
public boolean requiresScriptedObjectRefresh(ScriptSource scriptSource) {
return scriptSource.isModified();
}
@Override
public String toString() {
return "JRubyScriptFactory: script source locator [" + this.scriptSourceLocator + "]";
}
}