/*******************************************************************************
 * Copyright 2015 xWic group (http://www.xwic.de)
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * 		http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software 
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and 
 * limitations under the License.
 *  
 *******************************************************************************/
package de.jwic.data;

import java.util.List;

import de.jwic.util.Util;


/**
 * Content provider for IComboElement objects. This provider is based upon the ListContentProvider and
 * uses the IComboElement.key property as key if specified. If not, it uses the list index as a fallback.
 * @author lippisch
 */
public class SelectElementContentProvider extends ListContentProvider<ISelectElement> {
	private static final long serialVersionUID = 1L;
	/**
	 * @param list
	 */
	public SelectElementContentProvider(List<ISelectElement> list) {
		super(list);
	}
	
	/* (non-Javadoc)
	 * @see de.jwic.controls.combo.ListContentProvider#getUniqueKey(java.lang.Object)
	 */
	@Override
	public String getUniqueKey(ISelectElement object) {
		if (object.getKey() != null) {
			return object.getKey();
		} else {
			int idx = data.indexOf(object);
			return Integer.toString(idx);
		}
	}
	
	/* (non-Javadoc)
	 * @see de.jwic.controls.combo.ListContentProvider#getObjectFromKey(java.lang.String)
	 */
	@Override
	public ISelectElement getObjectFromKey(String uniqueKey) {
		for (ISelectElement elm : data) {
			if (uniqueKey.equals(elm.getKey())) {
				return elm; 
			}
		}
		
		return null;
	}

}