/**************************************************************
 * 
 * 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.
 * 
 *************************************************************/


package com.sun.star.script.framework.provider.beanshell;

import java.io.InputStream;
import java.io.IOException;

import java.net.URL;

import com.sun.star.script.provider.XScriptContext;

public class ScriptSourceModel {

    private int currentPosition = -1;
    private URL file = null;
    private ScriptSourceView view = null;

    public ScriptSourceModel(URL file ) {
        this.file = file;
    }

    private String load() throws IOException {
        StringBuffer buf = new StringBuffer();
        InputStream in = file.openStream();

        byte[] contents = new byte[1024];
        int len = 0;

        while ((len = in.read(contents, 0, 1024)) != -1) {
            buf.append(new String(contents, 0, len));
        }

        try {
            in.close();
        }
        catch (IOException ignore) {
        }

        return buf.toString();
    }

    public String getText() {
        String result = "";

        try {
            result = load();
        }
        catch (IOException ioe) {
            // do nothing, empty string will be returned
        }

        return result;
    }

    public int getCurrentPosition() {
        return this.currentPosition;
    }

    public void setView(ScriptSourceView view) {
        this.view = view;
    }

    public Object execute(final XScriptContext context, ClassLoader cl )
        throws Exception
    {
        Object result = null;
        // Thread execThread = new Thread() {
            // public void run() {
                if ( cl != null )
                {
                    // sets this threads class loader 
                    // hopefully any threads spawned by this
                    // will inherit this cl
                    // this enables any class files imported 
                    // from the interpreter to be loaded
                    // note: setting the classloader on the  
                    // interpreter has a slightly different 
                    // meaning in that the classloader for 
                    // the interpreter seems only to look for 
                    // source files ( bla.java ) in the classpath
                    Thread.currentThread().setContextClassLoader(cl);
                }
                bsh.Interpreter interpreter = new bsh.Interpreter();
                if ( cl != null )
                {
                    // additionally set class loader on the interpreter
                    // to allow it to load java classes defined in source
                    // files e.g. bla.java
                    interpreter.getNameSpace().clear();
                }


                // reset position
                currentPosition = -1;
                view.update();
                
                interpreter.set("XSCRIPTCONTEXT", context);
                interpreter.set("ARGUMENTS", new Object[0]);

                if (view.isModified()) {
                    result = interpreter.eval(view.getText());
                }
                else {
                    result = interpreter.eval(getText());
                }
            // }
        // };    
        // execThread.start();
        return result;
    }
    public void indicateErrorLine( int lineNum )
    {
        System.out.println("Beanshell indicateErrorLine " + lineNum );
        currentPosition = lineNum - 1;
        view.update();
    }
}
