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/*******************************************************************************
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* With minor modification for pydev
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* Copyright (c) 2000, 2004 IBM Corporation and others.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Common Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/cpl-v10.html
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* IBM Corporation - initial API and implementation
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* Scott Schlesier - minor changes for use in pydev
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*******************************************************************************/
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package org.python.pydev.plugin;
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import org.eclipse.jface.preference.IPreferenceStore;
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import org.eclipse.jface.preference.PreferenceStore;
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import org.eclipse.jface.text.Assert;
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import org.eclipse.jface.util.IPropertyChangeListener;
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import org.eclipse.jface.util.PropertyChangeEvent;
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* An overlaying preference store.
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public class OverlayPreferenceStore implements IPreferenceStore {
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public static final class TypeDescriptor {
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private TypeDescriptor() {
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public static final TypeDescriptor BOOLEAN= new TypeDescriptor();
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public static final TypeDescriptor DOUBLE= new TypeDescriptor();
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public static final TypeDescriptor FLOAT= new TypeDescriptor();
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public static final TypeDescriptor INT= new TypeDescriptor();
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public static final TypeDescriptor LONG= new TypeDescriptor();
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public static final TypeDescriptor STRING= new TypeDescriptor();
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public static class OverlayKey {
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TypeDescriptor fDescriptor;
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public OverlayKey(TypeDescriptor descriptor, String key) {
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fDescriptor= descriptor;
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private class PropertyListener implements IPropertyChangeListener {
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* @see IPropertyChangeListener#propertyChange(PropertyChangeEvent)
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public void propertyChange(PropertyChangeEvent event) {
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OverlayKey key= findOverlayKey(event.getProperty());
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propagateProperty(fParent, key, fStore);
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private IPreferenceStore fParent;
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private IPreferenceStore fStore;
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private OverlayKey[] fOverlayKeys;
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private PropertyListener fPropertyListener;
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private boolean fLoaded;
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public OverlayPreferenceStore(IPreferenceStore parent, OverlayKey[] overlayKeys) {
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fOverlayKeys= overlayKeys;
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fStore= new PreferenceStore();
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private OverlayKey findOverlayKey(String key) {
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for (int i= 0; i < fOverlayKeys.length; i++) {
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if (fOverlayKeys[i].fKey.equals(key))
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return fOverlayKeys[i];
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private boolean covers(String key) {
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return (findOverlayKey(key) != null);
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private void propagateProperty(IPreferenceStore orgin, OverlayKey key, IPreferenceStore target) {
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if (orgin.isDefault(key.fKey)) {
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if (!target.isDefault(key.fKey))
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target.setToDefault(key.fKey);
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TypeDescriptor d= key.fDescriptor;
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boolean originValue= orgin.getBoolean(key.fKey);
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boolean targetValue= target.getBoolean(key.fKey);
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if (targetValue != originValue)
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target.setValue(key.fKey, originValue);
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} else if (DOUBLE == d) {
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double originValue= orgin.getDouble(key.fKey);
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double targetValue= target.getDouble(key.fKey);
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if (targetValue != originValue)
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target.setValue(key.fKey, originValue);
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} else if (FLOAT == d) {
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float originValue= orgin.getFloat(key.fKey);
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float targetValue= target.getFloat(key.fKey);
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if (targetValue != originValue)
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target.setValue(key.fKey, originValue);
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} else if (INT == d) {
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int originValue= orgin.getInt(key.fKey);
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int targetValue= target.getInt(key.fKey);
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if (targetValue != originValue)
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target.setValue(key.fKey, originValue);
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} else if (LONG == d) {
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long originValue= orgin.getLong(key.fKey);
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long targetValue= target.getLong(key.fKey);
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if (targetValue != originValue)
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target.setValue(key.fKey, originValue);
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} else if (STRING == d) {
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String originValue= orgin.getString(key.fKey);
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String targetValue= target.getString(key.fKey);
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if (targetValue != null && originValue != null && !targetValue.equals(originValue))
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target.setValue(key.fKey, originValue);
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public void propagate() {
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for (int i= 0; i < fOverlayKeys.length; i++)
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propagateProperty(fStore, fOverlayKeys[i], fParent);
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private void loadProperty(IPreferenceStore orgin, OverlayKey key, IPreferenceStore target, boolean forceInitialization) {
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TypeDescriptor d= key.fDescriptor;
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if (forceInitialization)
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target.setValue(key.fKey, true);
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target.setValue(key.fKey, orgin.getBoolean(key.fKey));
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target.setDefault(key.fKey, orgin.getDefaultBoolean(key.fKey));
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} else if (DOUBLE == d) {
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if (forceInitialization)
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target.setValue(key.fKey, 1.0D);
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target.setValue(key.fKey, orgin.getDouble(key.fKey));
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target.setDefault(key.fKey, orgin.getDefaultDouble(key.fKey));
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} else if (FLOAT == d) {
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if (forceInitialization)
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target.setValue(key.fKey, 1.0F);
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target.setValue(key.fKey, orgin.getFloat(key.fKey));
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target.setDefault(key.fKey, orgin.getDefaultFloat(key.fKey));
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} else if (INT == d) {
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if (forceInitialization)
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target.setValue(key.fKey, 1);
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target.setValue(key.fKey, orgin.getInt(key.fKey));
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target.setDefault(key.fKey, orgin.getDefaultInt(key.fKey));
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} else if (LONG == d) {
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if (forceInitialization)
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target.setValue(key.fKey, 1L);
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target.setValue(key.fKey, orgin.getLong(key.fKey));
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target.setDefault(key.fKey, orgin.getDefaultLong(key.fKey));
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} else if (STRING == d) {
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if (forceInitialization)
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target.setValue(key.fKey, "1"); //$NON-NLS-1$
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target.setValue(key.fKey, orgin.getString(key.fKey));
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target.setDefault(key.fKey, orgin.getDefaultString(key.fKey));
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for (int i= 0; i < fOverlayKeys.length; i++)
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loadProperty(fParent, fOverlayKeys[i], fStore, true);
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public void loadDefaults() {
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for (int i= 0; i < fOverlayKeys.length; i++)
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setToDefault(fOverlayKeys[i].fKey);
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public void start() {
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if (fPropertyListener == null) {
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fPropertyListener= new PropertyListener();
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fParent.addPropertyChangeListener(fPropertyListener);
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if (fPropertyListener != null) {
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fParent.removePropertyChangeListener(fPropertyListener);
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fPropertyListener= null;
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* @see IPreferenceStore#addPropertyChangeListener(IPropertyChangeListener)
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public void addPropertyChangeListener(IPropertyChangeListener listener) {
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fStore.addPropertyChangeListener(listener);
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* @see IPreferenceStore#removePropertyChangeListener(IPropertyChangeListener)
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public void removePropertyChangeListener(IPropertyChangeListener listener) {
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fStore.removePropertyChangeListener(listener);
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* @see IPreferenceStore#firePropertyChangeEvent(String, Object, Object)
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public void firePropertyChangeEvent(String name, Object oldValue, Object newValue) {
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fStore.firePropertyChangeEvent(name, oldValue, newValue);
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* @see IPreferenceStore#contains(String)
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public boolean contains(String name) {
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return fStore.contains(name);
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* @see IPreferenceStore#getBoolean(String)
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public boolean getBoolean(String name) {
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return fStore.getBoolean(name);
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* @see IPreferenceStore#getDefaultBoolean(String)
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public boolean getDefaultBoolean(String name) {
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return fStore.getDefaultBoolean(name);
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* @see IPreferenceStore#getDefaultDouble(String)
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public double getDefaultDouble(String name) {
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return fStore.getDefaultDouble(name);
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* @see IPreferenceStore#getDefaultFloat(String)
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public float getDefaultFloat(String name) {
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return fStore.getDefaultFloat(name);
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* @see IPreferenceStore#getDefaultInt(String)
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public int getDefaultInt(String name) {
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return fStore.getDefaultInt(name);
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* @see IPreferenceStore#getDefaultLong(String)
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public long getDefaultLong(String name) {
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return fStore.getDefaultLong(name);
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* @see IPreferenceStore#getDefaultString(String)
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public String getDefaultString(String name) {
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return fStore.getDefaultString(name);
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* @see IPreferenceStore#getDouble(String)
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public double getDouble(String name) {
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return fStore.getDouble(name);
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* @see IPreferenceStore#getFloat(String)
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public float getFloat(String name) {
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return fStore.getFloat(name);
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* @see IPreferenceStore#getInt(String)
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public int getInt(String name) {
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return fStore.getInt(name);
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* @see IPreferenceStore#getLong(String)
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public long getLong(String name) {
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return fStore.getLong(name);
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* @see IPreferenceStore#getString(String)
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public String getString(String name) {
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return fStore.getString(name);
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* @see IPreferenceStore#isDefault(String)
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public boolean isDefault(String name) {
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return fStore.isDefault(name);
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* @see IPreferenceStore#needsSaving()
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public boolean needsSaving() {
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return fStore.needsSaving();
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* @see IPreferenceStore#putValue(String, String)
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public void putValue(String name, String value) {
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fStore.putValue(name, value);
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* @see IPreferenceStore#setDefault(String, double)
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public void setDefault(String name, double value) {
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fStore.setDefault(name, value);
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* @see IPreferenceStore#setDefault(String, float)
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public void setDefault(String name, float value) {
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fStore.setDefault(name, value);
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* @see IPreferenceStore#setDefault(String, int)
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public void setDefault(String name, int value) {
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fStore.setDefault(name, value);
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* @see IPreferenceStore#setDefault(String, long)
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public void setDefault(String name, long value) {
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fStore.setDefault(name, value);
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* @see IPreferenceStore#setDefault(String, String)
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public void setDefault(String name, String value) {
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fStore.setDefault(name, value);
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* @see IPreferenceStore#setDefault(String, boolean)
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public void setDefault(String name, boolean value) {
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fStore.setDefault(name, value);
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* @see IPreferenceStore#setToDefault(String)
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public void setToDefault(String name) {
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fStore.setToDefault(name);
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* @see IPreferenceStore#setValue(String, double)
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public void setValue(String name, double value) {
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fStore.setValue(name, value);
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* @see IPreferenceStore#setValue(String, float)
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public void setValue(String name, float value) {
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fStore.setValue(name, value);
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* @see IPreferenceStore#setValue(String, int)
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public void setValue(String name, int value) {
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fStore.setValue(name, value);
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* @see IPreferenceStore#setValue(String, long)
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public void setValue(String name, long value) {
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fStore.setValue(name, value);
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* @see IPreferenceStore#setValue(String, String)
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public void setValue(String name, String value) {
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fStore.setValue(name, value);
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* @see IPreferenceStore#setValue(String, boolean)
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public void setValue(String name, boolean value) {
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fStore.setValue(name, value);
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* The keys to add to the list of overlay keys.
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* Note: This method must be called before {@link #load()} is called.
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public void addKeys(OverlayKey[] keys) {
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Assert.isTrue(!fLoaded);
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Assert.isNotNull(keys);
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int overlayKeysLength= fOverlayKeys.length;
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OverlayKey[] result= new OverlayKey[keys.length + overlayKeysLength];
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for (int i= 0, length= overlayKeysLength; i < length; i++)
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result[i]= fOverlayKeys[i];
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for (int i= 0, length= keys.length; i < length; i++)
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result[overlayKeysLength + i]= keys[i];
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fOverlayKeys= result;