RamPreferences.java

/**
* OLAT - Online Learning and Training<br>
* http://www.olat.org
* <p>
* Licensed under the Apache License, Version 2.0 (the "License"); <br>
* you may not use this file except in compliance with the License.<br>
* You may obtain a copy of the License at
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* Unless required by applicable law or agreed to in writing,<br>
* software distributed under the License is distributed on an "AS IS" BASIS, <br>
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. <br>
* See the License for the specific language governing permissions and <br>
* limitations under the License.
* <p>
* Copyright (c) since 2004 at Multimedia- & E-Learning Services (MELS),<br>
* University of Zurich, Switzerland.
* <hr>
* <a href="http://www.openolat.org">
* OpenOLAT - Online Learning and Training</a><br>
* This file has been modified by the OpenOLAT community. Changes are licensed
* under the Apache 2.0 license as the original file.
*/
package org.olat.core.util.prefs.ram;

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

import org.olat.core.util.prefs.Preferences;

/**
 * Description:<br>
 * 
 * <P>
 * Initial Date:  13.10.2006 <br>
 * @author Felix
 */
public class RamPreferences implements Preferences {
	private Map<String, Object> store = new HashMap<String, Object>();
	
	
	/**
	 * @see org.olat.core.util.prefs.Preferences#get(java.lang.Class, java.lang.String)
	 */
	@Override
	public Object get(Class<?> attributedClass, String key) {
		return store.get(getCompoundKey(attributedClass, key));
	}

	@Override
	public Object get(String attributedClass, String key) {
		return store.get(attributedClass + ":" + key);
	}

	/**
	 * @see org.olat.core.util.prefs.Preferences#get(java.lang.Class, java.lang.String, java.lang.Object)
	 */
	public Object get(Class<?> attributedClass, String key, Object defaultValue) {
		Object value = get(attributedClass, key);
		if (value == null) return defaultValue;
		return value;
	}

	/**
	 * @see org.olat.core.util.prefs.Preferences#put(java.lang.Class, java.lang.String, java.lang.Object)
	 */
	public void put(Class<?> attributedClass, String key, Object value) {
		store.put(getCompoundKey(attributedClass, key), value);
	}

	/**
	 * @see org.olat.core.util.prefs.Preferences#putAndSave(java.lang.Class, java.lang.String, java.lang.Object)
	 */
	@Override
	public void putAndSave(Class<?> attributedClass, String key, Object value) {
		put(attributedClass, key, value);
		save();
	}

	@Override
	public void putAndSave(String attributedClass, String key, Object value) {
		store.put(attributedClass + ":" + key, value);
		save();
	}

	/**
	 * @see org.olat.core.util.prefs.Preferences#save()
	 */
	public void save() {
		// nothing to do for ram

	}
	
	private String getCompoundKey(Class<?> attributedClass, String key) {
		return attributedClass.getName()+":"+key;
	}

	public Object findPrefByKey(String partOfKey) {
		for (Iterator<String> iterator = store.keySet().iterator(); iterator.hasNext();) {
			String key = iterator.next();
			if (key.endsWith(partOfKey)) return store.get(key);
		}
		return null;
	}


	

}