/*****************************************************************
 * Copyright (c) 2011 Texas Instruments 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:
 *     Winnie Lai (Texas Instruments) - Individual Element Number Format example (Bug 202556)
 *****************************************************************/
package org.eclipse.cdt.examples.dsf.pda.ui.viewmodel;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map.Entry;

import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.ui.IMemento;
import org.eclipse.ui.IPersistableElement;

/**
 * Variable persistable for variable settings
 */
class VariablePersistable implements IPersistableElement, IAdaptable  {

	HashMap<String, String> map = new HashMap<String, String>();

	public void saveState(IMemento memento) {
		HashMap<String, String> clone = null;
		synchronized (map) {
			clone = new HashMap<String, String>(map);
		}
		Iterator<Entry<String, String> > it = clone.entrySet().iterator();
		while (it.hasNext()) {
			Entry<String, String> entry = it.next();
            IMemento value = memento.createChild("variable", entry.getKey());
            value.putString("format", entry.getValue());
		}
	}

	void restore(IMemento memento) {
		IMemento[] list = memento.getChildren("variable");
		HashMap<String, String> clone = new HashMap<String, String>();
		for (int i = 0; i < list.length; i++) {
			clone.put(list[i].getID(), list[i].getString("format"));
		}
		synchronized(map) {
			map.clear();
			map.putAll(clone);
		}
	}

	String getFormat(String key) {
		if (key == null)
			return null;
		synchronized (map) {
			return map.get(key);
		}
	}

	void setFormat(String key, String format) {
		synchronized (map) {
			if (format == null) {
				map.remove(key);
			} else {
				map.put(key, format);
			}
		}
	}

	public String getFactoryId() {
		return VariablePersistableFactory.getFactoryId();
	}

	public Object getAdapter(@SuppressWarnings("rawtypes") Class adapter) {
    	if (adapter.isInstance(this)) {
			return this;
    	}
		return null;
	}
}