com.agynamix.platform.impl.PreferenceConfigAdapterImpl.java Source code

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Here is the source code for com.agynamix.platform.impl.PreferenceConfigAdapterImpl.java

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/*
 * Copyright (c) 2004 agynamiX.com. All rights reserved. 
 * This file is made available under the terms of the
 * license this product is released under.
 * 
 * For details please see the license file you should have
 * received, or go to:
 * 
 * http://www.agynamix.com
 * 
 * Contributors: agynamiX.com (http://www.agynamix.com)
 */
package com.agynamix.platform.impl;

import java.util.Properties;

import org.eclipse.core.runtime.ListenerList;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;

import com.agynamix.platform.infra.ApplicationBase;
import com.agynamix.platform.infra.IConfiguration;
import com.agynamix.platform.infra.IPreferenceConfigAdapter;

/**
 * Adapter that takes changed properties and writes them back to the application property store
 * 
 * @version $Revision: 23 $ $Date: 2004-11-20 14:36:31 +0100 (Sa, 20 Nov 2004) $
 * @author tuhlmann
 * @since V0404
 */
public class PreferenceConfigAdapterImpl implements IPropertyChangeListener, IPreferenceConfigAdapter {

    final IConfiguration config;

    static final String SPECIAL_CHAR = ":\\";

    /**
     * List of registered listeners (element type: <code>IPropertyChangeListener</code>). These listeners are to be
     * informed when the current value of a preference changes.
     */
    private ListenerList listeners = new ListenerList();

    public PreferenceConfigAdapterImpl() {
        config = ApplicationBase.getContext().getConfiguration();
    }

    /**
     * @see org.eclipse.jface.util.IPropertyChangeListener#propertyChange(org.eclipse.jface.util.PropertyChangeEvent)
     */
    public void propertyChange(PropertyChangeEvent event) {
        String property = event.getProperty();
        config.setProperty(property, event.getNewValue());
        propagatePropertyChangeEvent(event);
    }

    public Properties loadDefaultProperties() {
        return config.exportDefaultProperties();
    }

    public Properties loadProperties() {
        return config.exportProperties();
    }

    public void saveProperties(Properties p) {
        // Properties are already written into XML through the Listener, now persist them
        config.save();
    }

    protected String escapeSpecials(String in) {
        StringBuffer out = new StringBuffer();
        for (int i = 0, j = in.length(); i < j; i++) {
            if (SPECIAL_CHAR.indexOf(in.charAt(i)) != -1) {
                out.append("\\");
            }
            out.append(in.charAt(i));
        }
        return out.toString();
    }

    /**
     * Forward this event to other registered listeners
     * 
     * @param event
     *          PropertyChangeEvent
     */
    void propagatePropertyChangeEvent(PropertyChangeEvent event) {
        final Object[] finalListeners = this.listeners.getListeners();
        for (int i = 0; i < finalListeners.length; ++i) {
            IPropertyChangeListener l = (IPropertyChangeListener) finalListeners[i];
            l.propertyChange(event);
        }
    }

    /**
     * @see com.agynamix.simidude.infra.PreferenceConfigAdapter#addPropertyChangeListener(org.eclipse.jface.util.IPropertyChangeListener)
     */
    public void addPropertyChangeListener(IPropertyChangeListener listener) {
        listeners.add(listener);
    }

    public void removePropertyChangeListener(IPropertyChangeListener listener) {
        listeners.remove(listener);
    }

}