Plex-FAWE/contrib/sunrhino/src/com/sk89q/worldedit/scripting/SunRhinoCraftScriptEngine.java

// $Id$
/*
 * WorldEdit
 * Copyright (C) 2010 sk89q <http://www.sk89q.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/

package com.sk89q.worldedit.scripting;

import java.util.Map;
import javax.script.ScriptException;
import com.sk89q.worldedit.WorldEdit;
import com.sk89q.worldedit.WorldEditException;
import sun.org.mozilla.javascript.internal.*;

public class SunRhinoCraftScriptEngine implements CraftScriptEngine {
    private int timeLimit;

    @Override
    public void setTimeLimit(int milliseconds) {
        timeLimit = milliseconds;
    }

    @Override
    public int getTimeLimit() {
        return timeLimit;
    }

    @Override
    public Object evaluate(final String script, final String filename,
            final Map<String, Object> args)
            throws ScriptException, Throwable {
        SunRhinoContextFactory factory = new SunRhinoContextFactory(timeLimit);
        factory.initApplicationClassLoader(WorldEdit.class.getClassLoader());
        
        try {
            return factory.call(new ContextAction() {
                public Object run(Context cx) {
                    Scriptable topLevel = new ImporterTopLevel(cx);
                    Scriptable scope = cx.initStandardObjects();
                    topLevel.setParentScope(scope);
                    
                    for (Map.Entry<String, Object> entry : args.entrySet()) {
                        ScriptableObject.putProperty(scope, entry.getKey(),
                                Context.javaToJS(entry.getValue(), scope));
                    }
                    
                    return cx.evaluateString(topLevel, script, filename, 1, null);
                }
            });
        } catch (Error e) {
            throw new ScriptException(e.getMessage());
        } catch (RhinoException e) {
            if (e instanceof WrappedException) {
                Throwable cause = ((WrappedException)e).getCause();
                if (cause instanceof WorldEditException) {
                    throw ((WrappedException)e).getCause();
                }
            }
            
            String msg;
            int line = (line = e.lineNumber()) == 0 ? -1 : line;
            
            if (e instanceof JavaScriptException) {
                msg = String.valueOf(((JavaScriptException)e).getValue());
            } else {
                msg = e.getMessage();
            }
            
            ScriptException scriptException =
                new ScriptException(msg, e.sourceName(), line);
            scriptException.initCause(e);
            
            throw scriptException;
        }
    }

}