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Java example source code file (ProgressListenerImpl.java)

This example Java source code file (ProgressListenerImpl.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

abbreviator, click, exit, ioexception, migratorframe, progresslistenerimpl, string, target_file_length, update_threshold

The ProgressListenerImpl.java Java example source code

/**
 * Copyright (c) 2004-2011 QOS.ch
 * All rights reserved.
 *
 * Permission is hereby granted, free  of charge, to any person obtaining
 * a  copy  of this  software  and  associated  documentation files  (the
 * "Software"), to  deal in  the Software without  restriction, including
 * without limitation  the rights to  use, copy, modify,  merge, publish,
 * distribute,  sublicense, and/or sell  copies of  the Software,  and to
 * permit persons to whom the Software  is furnished to do so, subject to
 * the following conditions:
 *
 * The  above  copyright  notice  and  this permission  notice  shall  be
 * included in all copies or substantial portions of the Software.
 *
 * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
 * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
 * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */
package org.slf4j.migrator.internal;

import java.io.File;
import java.io.IOException;

import org.slf4j.migrator.helper.Abbreviator;

public class ProgressListenerImpl implements ProgressListener {

    static final int TARGET_FILE_LENGTH = 85;
    static final int UPDATE_THRESHOLD = 100;

    int addFileCount = 0;
    int scanFileCount = 0;
    int inplaceConversionCount = 0;
    final MigratorFrame frame;

    Abbreviator abbr;

    long lastUpdate = 0;

    public ProgressListenerImpl(File projectFolder, MigratorFrame frame) {
        this.frame = frame;
        this.abbr = new Abbreviator((int) projectFolder.length(), TARGET_FILE_LENGTH, File.separatorChar);
    }

    public void onMigrationBegin() {
        frame.disableInput();
    }

    boolean isTooSoon() {
        long now = System.currentTimeMillis();
        if (now - lastUpdate < UPDATE_THRESHOLD) {
            return true;
        } else {
            lastUpdate = now;
            return false;
        }
    }

    public void onDirectory(File file) {
        if (isTooSoon())
            return;

        String abbreviatedName = getShortName(file);
        frame.otherLabel.setText("<html>
Searching folder [" + abbreviatedName + "]
Found " + addFileCount + " java files to scan.");
    }

    public void onDone() {
        frame.progressBar.setVisible(false);
        frame.otherLabel.setText("<html>Scanned " + addFileCount + " java files, " + inplaceConversionCount
                        + " files were modified.</font>");

        frame.migrateButton.setActionCommand(MigratorFrame.EXIT_COMMAND);
        frame.migrateButton.setText("Exit");
        frame.migrateButton.setToolTipText("Click on this button to exit this application.");
        frame.migrateButton.setEnabled(true);

    }

    public void onFileAddition(File file) {
        addFileCount++;
    }

    public void onFileScan(File file) {

        scanFileCount++;
        if (isTooSoon())
            return;
        String abbreviatedName = getShortName(file);

        frame.otherLabel.setText("<html>
Scanning file [" + abbreviatedName + "]
");
        // File + scanFileCount + " out of "+ addFileCount+" files to scan."+
        // inplaceConversionCount+ " files converted." +

        frame.progressBar.setValue(scanFileCount);
    }

    public void onInplaceConversion(File file) {
        inplaceConversionCount++;
    }

    String getShortName(File file) {
        try {
            return abbr.abbreviate(file.getCanonicalPath());
        } catch (IOException e) {
            return file.toString();
        }
    }

    public void onFileScanBegin() {
        frame.progressBar.setMaximum(addFileCount);
        frame.progressBar.setValue(0);
        frame.progressBar.setVisible(true);
    }

}

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