source: release-kits/lirk3/bin/ant-installer/src_ext/org/tp23/antinstaller/runtime/exe/ReleaseNotesFilter.java@ 14982

/*
 * Licensed 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 org.tp23.antinstaller.runtime.exe;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ResourceBundle;

import org.tp23.antinstaller.InstallException;
import org.tp23.antinstaller.InstallerContext;
import org.tp23.antinstaller.input.OutputField;
import org.tp23.antinstaller.renderer.text.Pager;
import org.tp23.antinstaller.runtime.Runner;
import org.tp23.antinstaller.runtime.SwingRunner;
import org.tp23.antinstaller.runtime.TextRunner;


/**
 * A filter that launches a window with release notes if a property has been selected
 * during the install.  The notes are loaded from a resource on the classpath
 * called /release-notes.txt
 * @author Paul Hinds
 * @version $Id: ReleaseNotesFilter.java,v 1.4 2007/01/04 22:57:18 teknopaul Exp $
 */
public class ReleaseNotesFilter implements ExecuteFilter {
    
    private static final ResourceBundle res = ResourceBundle.getBundle("org.tp23.antinstaller.renderer.text.Res");
    private static final String nextChar = res.getString("nextChar");

    /**
     * The AntInstaller property that must be "true" for the release notes to show
     */
    public static final String RELEASE_NOTES_PROPERTY = "show.release.notes";

    public ReleaseNotesFilter() {
    }

    public void exec(InstallerContext ctx) throws InstallException {
        if(ctx.isInstallSucceded() ){
            String showReleaseNotes = ctx.getInstaller().getResultContainer().getProperty(RELEASE_NOTES_PROPERTY);
            if(OutputField.isTrue(showReleaseNotes)){
                try {
                    InputStream is = ReleaseNotesFilter.class.getResourceAsStream("/release-notes.txt");
                    BufferedReader br = new BufferedReader(new InputStreamReader(is));
                    String line = null;
                    StringBuffer file = new StringBuffer();
                    while((line = br.readLine())!=null){
                        file.append(line).append('\n');
                    }
                    br.close();
                    Runner runner = ctx.getRunner();
                    if(runner instanceof TextRunner){
                        renderText(file.toString());

                    }
                    else{ // if(runner instanceof SwingRunner){
                        //SwingRunner sRunner = (SwingRunner)runner;
                        ReleaseNotesFrame rFrame = new ReleaseNotesFrame("Readme");
                        rFrame.init(file.toString());
                    }
                }
                catch (IOException e) {
                    throw new InstallException("Could not render Release notes",e);
                }
            }
        }
    }
    
    private void renderText(String text) throws IOException{
        BufferedReader commandReader = new BufferedReader(new InputStreamReader(System.in));
        Pager pager = new Pager(text);
        String command = null;
        do {
            if (!pager.next(System.out)) {
                break;
            }
            System.out.println();
            System.out.println(getNextInstructions());
            command = commandReader.readLine();
        }
        while (command.toUpperCase().startsWith(nextChar));
        pager.rest(System.out);
        
    }
    private String getNextInstructions() {
        return res.getString("large_select_next");
    }

}