/*

 * Copyright 1998-2007 Sun Microsystems, Inc.  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.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

package com.sun.hotspot.igv.filter;

import com.sun.hotspot.igv.graph.Diagram;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.util.Collection;

import java.util.logging.Level;

import java.util.logging.Logger;

import org.openide.DialogDisplayer;

import org.openide.NotifyDescriptor;

import org.openide.cookies.OpenCookie;

import org.openide.filesystems.Repository;

import org.openide.filesystems.FileSystem;

import org.openide.filesystems.FileObject;

import org.openide.util.Exceptions;

import org.openide.util.Lookup;

/**

 *

 * @author Thomas Wuerthinger

 */

public class CustomFilter extends AbstractFilter {

    public static final String JAVASCRIPT_HELPER_ID = "JavaScriptHelper";

    private static ScriptEngineAbstraction engine;

    private String code;

    private String name;

    public CustomFilter(String name, String code) {

        this.name = name;

        this.code = code;

    }

    public String getName() {

        return name;

    }

    public String getCode() {

        return code;

    }

    public void setName(String s) {

        name = s;

        fireChangedEvent();

    }

    public void setCode(String s) {

        code = s;

        fireChangedEvent();

    }

    @Override

    public OpenCookie getEditor() {

        return new OpenCookie() {

            public void open() {

                openInEditor();

            }

        };

    }

    public boolean openInEditor() {

        EditFilterDialog dialog = new EditFilterDialog(CustomFilter.this);

        dialog.setVisible(true);

        return dialog.wasAccepted();

    }

    @Override

    public String toString() {

        return getName();

    }

    public static ScriptEngineAbstraction getEngine() {

        if (engine == null) {

            ScriptEngineAbstraction chosen = null;

            try {

                Collection<? extends ScriptEngineAbstraction> list = Lookup.getDefault().lookupAll(ScriptEngineAbstraction.class);

                for (ScriptEngineAbstraction s : list) {

                    if (s.initialize(getJsHelperText())) {

                        if (chosen == null || !(chosen instanceof JavaSE6ScriptEngine)) {

                            chosen = s;

                        }

                    }

                }

            } catch (NoClassDefFoundError ncdfe) {

                Logger.getLogger("global").log(Level.SEVERE, null, ncdfe);

            }

            if (chosen == null) {

                NotifyDescriptor message = new NotifyDescriptor.Message("Could not find a scripting engine. Please make sure that the Rhino scripting engine is available. Otherwise filter cannot be used.", NotifyDescriptor.ERROR_MESSAGE);

                DialogDisplayer.getDefault().notifyLater(message);

                chosen = new NullScriptEngine();

            }

            engine = chosen;

        }

        return engine;

    }

    private static String getJsHelperText() {

        InputStream is = null;

        StringBuilder sb = new StringBuilder("importPackage(Packages.com.sun.hotspot.igv.filter);importPackage(Packages.com.sun.hotspot.igv.graph);importPackage(Packages.com.sun.hotspot.igv.data);importPackage(Packages.com.sun.hotspot.igv.util);importPackage(java.awt);");

        try {

            FileSystem fs = Repository.getDefault().getDefaultFileSystem();

            FileObject fo = fs.getRoot().getFileObject(JAVASCRIPT_HELPER_ID);

            is = fo.getInputStream();

            BufferedReader r = new BufferedReader(new InputStreamReader(is));

            String s;

            while ((s = r.readLine()) != null) {

                sb.append(s);

                sb.append("\n");

            }

        } catch (IOException ex) {

            Logger.getLogger("global").log(Level.SEVERE, null, ex);

        } finally {

            try {

                is.close();

            } catch (IOException ex) {

                Exceptions.printStackTrace(ex);

            }

        }

        return sb.toString();

    }

    public void apply(Diagram d) {

        getEngine().execute(d, code);

    }

}