package org.apache.maven.shared.scriptinterpreter;
/*
* 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.
*/
import bsh.Capabilities;
import bsh.EvalError;
import bsh.Interpreter;
import bsh.TargetError;
import java.io.File;
import java.io.IOException;
import java.io.PrintStream;
import java.util.List;
import java.util.Map;
import org.codehaus.plexus.component.annotations.Component;
/**
* Provides a facade to evaluate BeanShell scripts.
*
* @author Benjamin Bentmann
* @version $Id: BeanShellScriptInterpreter.java 1361828 2012-07-15 22:30:27Z hboutemy $
*/
@Component( role = ScriptInterpreter.class, hint = "bsh" )
public class BeanShellScriptInterpreter
implements ScriptInterpreter
{
/**
* {@inheritDoc}
*/
public Object evaluateScript( String script, List<String> classPath, Map<String, ? extends Object> globalVariables,
PrintStream scriptOutput )
throws ScriptEvaluationException
{
PrintStream origOut = System.out;
PrintStream origErr = System.err;
try
{
Interpreter engine = new Interpreter();
if ( scriptOutput != null )
{
System.setErr( scriptOutput );
System.setOut( scriptOutput );
engine.setErr( scriptOutput );
engine.setOut( scriptOutput );
}
if ( !Capabilities.haveAccessibility() )
{
try
{
Capabilities.setAccessibility( true );
}
catch ( Exception e )
{
if ( scriptOutput != null )
{
e.printStackTrace( scriptOutput );
}
}
}
if ( classPath != null && !classPath.isEmpty() )
{
for ( String path : classPath )
{
try
{
engine.getClassManager().addClassPath( new File( path ).toURI().toURL() );
}
catch ( IOException e )
{
throw new RuntimeException( "bad class path: " + path, e );
}
}
}
if ( globalVariables != null )
{
for ( String variable : globalVariables.keySet() )
{
Object value = globalVariables.get( variable );
try
{
engine.set( variable, value );
}
catch ( EvalError e )
{
throw new RuntimeException( e );
}
}
}
try
{
return engine.eval( script );
}
catch ( TargetError e )
{
throw new ScriptEvaluationException( e.getTarget() );
}
catch ( ThreadDeath e )
{
throw e;
}
catch ( Throwable e )
{
throw new ScriptEvaluationException( e );
}
}
finally
{
System.setErr( origErr );
System.setOut( origOut );
}
}
}