/*

 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description: 

 *

 */

package com.nokia.carbide.cpp.internal.pi.properties;

import java.io.BufferedInputStream;

import java.io.EOFException;

import java.io.IOException;

import java.io.InputStream;

import java.io.InvalidClassException;

import java.io.ObjectInputStream;

import java.io.ObjectStreamClass;

import java.util.zip.GZIPInputStream;

import org.eclipse.core.resources.IFile;

import org.eclipse.core.runtime.CoreException;

import org.eclipse.core.runtime.IAdaptable;

import org.eclipse.swt.SWT;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Control;

import org.eclipse.swt.widgets.Label;

import org.eclipse.ui.IWorkbenchPropertyPage;

import org.eclipse.ui.dialogs.PropertyPage;

import com.nokia.carbide.cpp.internal.pi.manager.PluginInitialiser;

import com.nokia.carbide.cpp.internal.pi.test.AnalysisInfoHandler;

import com.nokia.carbide.cpp.internal.pi.test.PIAnalysisInfo;

import com.nokia.carbide.cpp.internal.pi.test.BappeaAnalysisInfo;

import com.nokia.carbide.cpp.internal.pi.utils.PluginClassLoader;

public class PIPropertyPage extends PropertyPage implements

		IWorkbenchPropertyPage {

	@Override

	protected Control createContents(Composite parent) {

		noDefaultAndApplyButton();

		// we will read the first object in the file and use it to

		IAdaptable resource = this.getElement();

		if (!(resource instanceof IFile))

			return null;

		IFile file = (IFile) resource;

		InputStream input = null;

		// make sure we can open an input stream to the trace file

		try {

			input = file.getContents();

		} catch (CoreException e) {

			System.out.println(Messages.getString("PIPropertyPage.cannotReadFile") + file.getName()); //$NON-NLS-1$

			return null;

		}

		if (input == null)

			return null;

		// the file contains Java objects that have been gziped

		GZIPInputStream ziss = null;

		try {

			ziss = new GZIPInputStream(input);

		} catch (IOException e) {

			System.out.println(Messages.getString("PIPropertyPage.cannotReadFile") + file.getName()); //$NON-NLS-1$

			return null;

		}

		BufferedInputStream bis = new BufferedInputStream(ziss);

		ObjectInputStream ois = null;

		Object ou = null;

	    try {

			ois = new ObjectInputStream(bis) {

			    @SuppressWarnings("unchecked") //$NON-NLS-1$

				protected Class resolveClass(ObjectStreamClass desc) throws IOException, ClassNotFoundException {

			    	// each object read must have a class corresponding to a plugin class

			    	String name = desc.getName();

					Class c = PluginInitialiser.getPluginClass(name);

					if (c == null) {

						try {

							c = Class.forName(name);

						} catch (ClassNotFoundException e) {

							// see if we have a replacement

							PluginClassLoader pcl = (PluginClassLoader)PluginInitialiser.getPluginClassLoader();

							// don't catch for class not found exception, they did it on purpose 

							// to back out of this missing plugin that exist in data file

							c = pcl.findClass(name);

						}

					}

			   		return c;

			    }

			};

			//read the first object

           	ou = ois.readObject();

        }

    	catch (ClassNotFoundException cnfe) {

	    }

	    catch(EOFException eof) {

	    }

	    catch (InvalidClassException ie) {

	    }

        catch (IOException e) {

        }

        catch (Exception eih) {

        };

	    // close the readers

        if (ois != null)

			try {

				ois.close();

			}

        	catch (IOException e) {

			}

		if (bis != null)

			try {

				bis.close();

			}

			catch (IOException e) {

			}

		if (ziss != null)

			try {

				ziss.close();

			}

			catch (IOException e) {

			}

		AnalysisInfoHandler aih = new AnalysisInfoHandler();

		if (ou instanceof PIAnalysisInfo) {

			aih.analysisDataReader((PIAnalysisInfo) ou);

			aih.getAnalysisInfoLabels(parent);

		} else if (ou instanceof BappeaAnalysisInfo) {

			aih.analysisDataReader((BappeaAnalysisInfo) ou);

			aih.getAnalysisInfoLabels(parent);

		} else {

			Label label = new Label(parent, SWT.WRAP);

			label.setText(Messages.getString("PIPropertyPage.noPIinformation")); //$NON-NLS-1$

		}

		return null;

	}

}