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GroovyScriptEngineFactory.java
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GroovyScriptEngineFactory.java
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/*
* See the NOTICE file distributed with this work for additional
* information regarding copyright ownership.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.xwiki.groovy.internal;
import java.util.List;
import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Singleton;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineFactory;
import org.codehaus.groovy.control.CompilerConfiguration;
import org.codehaus.groovy.control.customizers.CompilationCustomizer;
import org.codehaus.groovy.jsr223.GroovyScriptEngineImpl;
import org.xwiki.component.annotation.Component;
import org.xwiki.groovy.GroovyConfiguration;
import groovy.lang.GroovyClassLoader;
/**
* This class is required since the JSR223 doesn't allow configuring the classloader used by the Script Engine
* implementation and this is how Groovy supports customizing script compilation.
*
* @version $Id$
* @since 4.1M1
*/
@Component(roles = {ScriptEngineFactory.class })
@Named("groovy")
@Singleton
public class GroovyScriptEngineFactory extends org.codehaus.groovy.jsr223.GroovyScriptEngineFactory
{
/**
* The Groovy configuration, used to get the list of Groovy Compilation Customizers.
*/
@Inject
private GroovyConfiguration configuration;
@Override
public ScriptEngine getScriptEngine()
{
// We configure the Groovy Script Engine with a custom GroovyClassLoader that we specifically configure with
// Compilation Configurations to protect for example against scripts taking too long to execute.
GroovyScriptEngineImpl engine = (GroovyScriptEngineImpl) super.getScriptEngine();
// Add all the defined Customizers
CompilerConfiguration config = new CompilerConfiguration();
List<CompilationCustomizer> customizers = this.configuration.getCompilationCustomizers();
if (!customizers.isEmpty()) {
config.addCompilationCustomizers(customizers.toArray(new CompilationCustomizer[customizers.size()]));
}
ClassLoader parentClassLoader = Thread.currentThread().getContextClassLoader();
GroovyClassLoader loader = new GroovyClassLoader(parentClassLoader, config);
engine.setClassLoader(loader);
return engine;
}
}