/*
 * Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package de.christophkraemer.rhino.javascript;

import org.mozilla.javascript.*;

import javax.script.CompiledScript;
import javax.script.ScriptContext;
import javax.script.ScriptEngine;
import javax.script.ScriptException;

/**
 * Represents compiled JavaScript code.
 *
 * @author Mike Grogan
 * @since 1.6
 */
 final class RhinoCompiledScript extends CompiledScript {

    private RhinoScriptEngine engine;
    private Script script;


    RhinoCompiledScript(RhinoScriptEngine engine, Script script) {
        this.engine = engine;
        this.script = script;
    }

    public Object eval(ScriptContext context) throws ScriptException {

        Object result = null;
        Context cx = RhinoScriptEngine.enterContext();
        try {

            Scriptable scope = engine.getRuntimeScope(context);
            Object ret = script.exec(cx, scope);
            result = engine.unwrapReturnValue(ret);
        } catch (RhinoException re) {
            int line = (line = re.lineNumber()) == 0 ? -1 : line;
            String msg;
            if (re instanceof JavaScriptException) {
                msg = String.valueOf(((JavaScriptException) re).getValue());
            } else {
                msg = re.toString();
            }
            ScriptException se = new ScriptException(msg, re.sourceName(), line);
            se.initCause(re);
            throw se;
        } finally {
            Context.exit();
        }

        return result;
    }

    public ScriptEngine getEngine() {
        return engine;
    }

}