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/*
 * Beangle, Agile Development Scaffold and Toolkits.
 *
 * Copyright © 2005, The Beangle Software.
 *
 * This program 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 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 program.  If not, see .
 */
package org.beangle.commons.entity.util;

import org.beangle.commons.lang.Strings;
import org.beangle.commons.lang.functor.Predicate;

/**
 * 

* EmptyKeyPredicate class. *

* * @author chaostone * @version $Id: $ */ public class EmptyKeyPredicate implements Predicate { public Boolean apply(final Object value) { boolean success = false; if (null != value) { if (value instanceof String) { success = Strings.isEmpty((String) value); } else if (value instanceof Number) { success = (0 == ((Number) value).intValue()); } else { throw new RuntimeException("unsupported key type"); } } return success; } }