/**
 *
 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either 
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public 
 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 * 
 **/
package lucee.runtime.functions.cache;

import java.util.Iterator;
import java.util.List;

import lucee.commons.io.cache.Cache;
import lucee.runtime.PageContext;
import lucee.runtime.cache.CacheUtil;
import lucee.runtime.cache.util.WildCardFilter;
import lucee.runtime.config.Config;
import lucee.runtime.exp.PageException;
import lucee.runtime.ext.function.Function;
import lucee.runtime.op.Caster;
import lucee.runtime.type.Array;
import lucee.runtime.type.ArrayImpl;

/**
 * 
 */
public final class CacheGetAllIds implements Function {
	
	private static final long serialVersionUID = 4831944874663718056L;


	public static Array call(PageContext pc) throws PageException {
		return call(pc, null,null);
	}
	

	public static Array call(PageContext pc, String filter) throws PageException {
		return call(pc, filter, null);
	}
	
	public static Array call(PageContext pc, String filter, String cacheName) throws PageException {
		try {
			Cache cache = CacheUtil.getCache(pc,cacheName,Config.CACHE_TYPE_OBJECT);
			
			List<String> keys = isFilter(filter)?cache.keys(new WildCardFilter(filter,true)):cache.keys();
			Iterator<String> it = keys.iterator();
			Array arr = new ArrayImpl();
			while(it.hasNext()){
				arr.append(it.next());
			}
			return arr;
		} catch (Exception e) {
			throw Caster.toPageException(e);
		}
	}


	protected static boolean isFilter(String filter) {
		return filter!=null && filter.length()>0 && !filter.equals("*");
	}
}