/*
* uDig - User Friendly Desktop Internet GIS client
* http://udig.refractions.net
* (C) 2012, Refractions Research Inc.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* (http://www.eclipse.org/legal/epl-v10.html), and the Refractions BSD
* License v1.0 (http://udig.refractions.net/files/bsd3-v10.html).
*/
package org.locationtech.udig.style.sld.editor;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Plugin;
import org.eclipse.core.runtime.preferences.IEclipsePreferences;
import org.osgi.service.prefs.BackingStoreException;
import org.osgi.service.prefs.Preferences;
public class SLDRootPreferences extends SLDPreferences {
/**
* Default constructor.
*/
public SLDRootPreferences() {
super(null, ""); //$NON-NLS-1$
}
/*
* @see org.osgi.service.prefs.Preferences#flush()
*/
public void flush() throws BackingStoreException {
// flush all children
BackingStoreException exception = null;
String[] names = childrenNames();
for (int i = 0; i < names.length; i++) {
try {
node(names[i]).flush();
} catch (BackingStoreException e) {
// store the first exception we get and still try and flush
// the rest of the children.
if (e != null)
exception = e;
}
}
if (exception != null)
throw exception;
}
/*
* @see EclipsePreferences#getChild(String, Plugin)
*/
protected synchronized IEclipsePreferences getChild(String key, Plugin context) {
Object value = null;
IEclipsePreferences child = null;
if (children != null)
value = children.get(key);
if (value != null) {
if (value instanceof IEclipsePreferences)
return (IEclipsePreferences) value;
//lazy initialization
child = ((SLDPreferencesService) Platform.getPreferencesService()).createNode(key);
addChild(key, child);
}
return child;
}
/*
* @see EclipsePreferences#getChildren()
*/
protected synchronized IEclipsePreferences[] getChildren() throws BackingStoreException {
//must perform lazy initialization of child nodes
String[] childNames = childrenNames();
IEclipsePreferences[] childNodes = new IEclipsePreferences[childNames.length];
for (int i = 0; i < childNames.length; i++)
childNodes[i] = getChild(childNames[i], null);
return childNodes;
}
/*
* @see Preferences#node(String)
*/
public Preferences node(String path) {
if (path.length() == 0 || (path.length() == 1 && path.charAt(0) == IPath.SEPARATOR))
return this;
int startIndex = path.charAt(0) == IPath.SEPARATOR ? 1 : 0;
int endIndex = path.indexOf(IPath.SEPARATOR, startIndex + 1);
String scope = path.substring(startIndex, endIndex == -1 ? path.length() : endIndex);
IEclipsePreferences child = getChild(scope, null);
if (child == null) {
child = new SLDPreferences(this, scope);
addChild(scope, child);
}
return child.node(endIndex == -1 ? "" : path.substring(endIndex + 1)); //$NON-NLS-1$
}
/*
* @see org.osgi.service.prefs.Preferences#sync()
*/
public void sync() throws BackingStoreException {
// sync all children
BackingStoreException exception = null;
String[] names = childrenNames();
for (int i = 0; i < names.length; i++) {
try {
node(names[i]).sync();
} catch (BackingStoreException e) {
// store the first exception we get and still try and sync
// the rest of the children.
if (e != null)
exception = e;
}
}
if (exception != null)
throw exception;
}
}