tinyos.yeti.PreferencesAdapter.java Source code

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Here is the source code for tinyos.yeti.PreferencesAdapter.java

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/*
 * Yeti 2, NesC development in Eclipse.
 * Copyright (C) 2009 ETH Zurich
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Web:  http://tos-ide.ethz.ch
 * Mail: tos-ide@tik.ee.ethz.ch
 */
package tinyos.yeti;

/*******************************************************************************
 * Copyright (c) 2000, 2005 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

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

/**
 * Adapts {@link org.eclipse.core.runtime.Preferences} to
 * {@link org.eclipse.jface.preference.IPreferenceStore}
 *
 * @since 3.0
 */
public class PreferencesAdapter implements IPreferenceStore {

    /**
     * Property change listener. Listens for events of type
     * {@link org.eclipse.core.runtime.Preferences.PropertyChangeEvent} and fires
     * a {@link org.eclipse.jface.util.PropertyChangeEvent} on the
     * adapter with arguments from the received event.
     */
    private class PropertyChangeListener implements Preferences.IPropertyChangeListener {

        /*
         * @see org.eclipse.core.runtime.Preferences.IPropertyChangeListener#propertyChange(org.eclipse.core.runtime.Preferences.PropertyChangeEvent)
         */
        public void propertyChange(Preferences.PropertyChangeEvent event) {
            firePropertyChangeEvent(event.getProperty(), event.getOldValue(), event.getNewValue());
        }
    }

    /** Listeners on the adapter */
    private ListenerList fListeners = new ListenerList(ListenerList.IDENTITY);

    /** Listener on the adapted Preferences */
    private PropertyChangeListener fListener = new PropertyChangeListener();

    /** Adapted Preferences */
    private Preferences fPreferences;

    /** True iff no events should be forwarded */
    private boolean fSilent;

    /**
     * Initialize with empty Preferences.
     */
    public PreferencesAdapter() {
        this(new Preferences());
    }

    /**
     * Initialize with the given Preferences.
     *
     * @param preferences The preferences to wrap.
     */
    public PreferencesAdapter(Preferences preferences) {
        fPreferences = preferences;
    }

    /**
     * {@inheritDoc}
     */
    public void addPropertyChangeListener(IPropertyChangeListener listener) {
        if (fListeners.size() == 0)
            fPreferences.addPropertyChangeListener(fListener);
        fListeners.add(listener);
    }

    /**
     * {@inheritDoc}
     */
    public void removePropertyChangeListener(IPropertyChangeListener listener) {
        fListeners.remove(listener);
        if (fListeners.size() == 0)
            fPreferences.removePropertyChangeListener(fListener);
    }

    /**
     * {@inheritDoc}
     */
    public boolean contains(String name) {
        return fPreferences.contains(name);
    }

    /**
     * {@inheritDoc}
     */
    public void firePropertyChangeEvent(String name, Object oldValue, Object newValue) {
        if (!fSilent) {
            PropertyChangeEvent event = new PropertyChangeEvent(this, name, oldValue, newValue);
            Object[] listeners = fListeners.getListeners();
            for (int i = 0; i < listeners.length; i++)
                ((IPropertyChangeListener) listeners[i]).propertyChange(event);
        }
    }

    /**
     * {@inheritDoc}
     */
    public boolean getBoolean(String name) {
        return fPreferences.getBoolean(name);
    }

    /**
     * {@inheritDoc}
     */
    public boolean getDefaultBoolean(String name) {
        return fPreferences.getDefaultBoolean(name);
    }

    /**
     * {@inheritDoc}
     */
    public double getDefaultDouble(String name) {
        return fPreferences.getDefaultDouble(name);
    }

    /**
     * {@inheritDoc}
     */
    public float getDefaultFloat(String name) {
        return fPreferences.getDefaultFloat(name);
    }

    /**
     * {@inheritDoc}
     */
    public int getDefaultInt(String name) {
        return fPreferences.getDefaultInt(name);
    }

    /**
     * {@inheritDoc}
     */
    public long getDefaultLong(String name) {
        return fPreferences.getDefaultLong(name);
    }

    /**
     * {@inheritDoc}
     */
    public String getDefaultString(String name) {
        return fPreferences.getDefaultString(name);
    }

    /**
     * {@inheritDoc}
     */
    public double getDouble(String name) {
        return fPreferences.getDouble(name);
    }

    /**
     * {@inheritDoc}
     */
    public float getFloat(String name) {
        return fPreferences.getFloat(name);
    }

    /**
     * {@inheritDoc}
     */
    public int getInt(String name) {
        return fPreferences.getInt(name);
    }

    /**
     * {@inheritDoc}
     */
    public long getLong(String name) {
        return fPreferences.getLong(name);
    }

    /**
     * {@inheritDoc}
     */
    public String getString(String name) {
        return fPreferences.getString(name);
    }

    /**
     * {@inheritDoc}
     */
    public boolean isDefault(String name) {
        return fPreferences.isDefault(name);
    }

    /**
     * {@inheritDoc}
     */
    public boolean needsSaving() {
        return fPreferences.needsSaving();
    }

    /**
     * {@inheritDoc}
     */
    public void putValue(String name, String value) {
        try {
            fSilent = true;
            fPreferences.setValue(name, value);
        } finally {
            fSilent = false;
        }
    }

    /**
     * {@inheritDoc}
     */
    public void setDefault(String name, double value) {
        fPreferences.setDefault(name, value);
    }

    /**
     * {@inheritDoc}
     */
    public void setDefault(String name, float value) {
        fPreferences.setDefault(name, value);
    }

    /**
     * {@inheritDoc}
     */
    public void setDefault(String name, int value) {
        fPreferences.setDefault(name, value);
    }

    /**
     * {@inheritDoc}
     */
    public void setDefault(String name, long value) {
        fPreferences.setDefault(name, value);
    }

    /**
     * {@inheritDoc}
     */
    public void setDefault(String name, String defaultObject) {
        fPreferences.setDefault(name, defaultObject);
    }

    /**
     * {@inheritDoc}
     */
    public void setDefault(String name, boolean value) {
        fPreferences.setDefault(name, value);
    }

    /**
     * {@inheritDoc}
     */
    public void setToDefault(String name) {
        fPreferences.setToDefault(name);
    }

    /**
     * {@inheritDoc}
     */
    public void setValue(String name, double value) {
        fPreferences.setValue(name, value);
    }

    /**
     * {@inheritDoc}
     */
    public void setValue(String name, float value) {
        fPreferences.setValue(name, value);
    }

    /**
     * {@inheritDoc}
     */
    public void setValue(String name, int value) {
        fPreferences.setValue(name, value);
    }

    /**
     * {@inheritDoc}
     */
    public void setValue(String name, long value) {
        fPreferences.setValue(name, value);
    }

    /**
     * {@inheritDoc}
     */
    public void setValue(String name, String value) {
        fPreferences.setValue(name, value);
    }

    /**
     * {@inheritDoc}
     */
    public void setValue(String name, boolean value) {
        fPreferences.setValue(name, value);
    }
}