    001/*
    002 *  Licensed to the Apache Software Foundation (ASF) under one or more
    003 *  contributor license agreements.  See the NOTICE file distributed with
    004 *  this work for additional information regarding copyright ownership.
    005 *  The ASF licenses this file to You under the Apache License, Version 2.0
    006 *  (the "License"); you may not use this file except in compliance with
    007 *  the License.  You may obtain a copy of the License at
    008 *
    009 *     http://www.apache.org/licenses/LICENSE-2.0
    010 *
    011 *  Unless required by applicable law or agreed to in writing, software
    012 *  distributed under the License is distributed on an "AS IS" BASIS,
    013 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014 *  See the License for the specific language governing permissions and
    015 *  limitations under the License.
    016 */
    017package org.apache.commons.compress.harmony.pack200;
    018
    019import java.beans.PropertyChangeListener;
    020import java.beans.PropertyChangeSupport;
    021import java.io.IOException;
    022import java.util.SortedMap;
    023import java.util.TreeMap;
    024
    025/**
    026 * Provides generic JavaBeans support for the Pack/UnpackAdapters
    027 */
    028public abstract class Pack200Adapter {
    029
    030    protected static final int DEFAULT_BUFFER_SIZE = 8192;
    031
    032    private final PropertyChangeSupport support = new PropertyChangeSupport(this);
    033
    034    private final SortedMap<String, String> properties = new TreeMap<>();
    035
    036    public void addPropertyChangeListener(final PropertyChangeListener listener) {
    037        support.addPropertyChangeListener(listener);
    038    }
    039
    040    /**
    041     * Completion between 0..1.
    042     *
    043     * @param value Completion between 0..1.
    044     * @throws IOException if the value cannot be parsed
    045     */
    046    protected void completed(final double value) throws IOException {
    047        firePropertyChange("pack.progress", null, String.valueOf((int) (100 * value))); //$NON-NLS-1$
    048    }
    049
    050    /**
    051     * Reports a property update to listeners
    052     *
    053     * @param propertyName name of property being updated
    054     * @param oldValue old property value
    055     * @param newValue new property value
    056     * @throws IOException if the values cannot be parsed
    057     */
    058    protected void firePropertyChange(final String propertyName, final Object oldValue, final Object newValue) throws IOException {
    059        support.firePropertyChange(propertyName, oldValue, newValue);
    060    }
    061
    062    public SortedMap<String, String> properties() {
    063        return properties;
    064    }
    065
    066    public void removePropertyChangeListener(final PropertyChangeListener listener) {
    067        support.removePropertyChangeListener(listener);
    068    }
    069}