/*
 * Copyright 2006 Takahiro Nakamura.
 *
 * 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 woolpack.bool;

import woolpack.fn.Fn;

/**
 * null でない、かつ文字列の場合は空でないことをチェックする{@link Fn}です。
 * このクラスは LSP(The Liskov Substitution Principle) を満たしません。
 * @author nakamura
 *
 */
public class NotEmptyChecker implements Fn<Object, Boolean> {
	public Boolean exec(final Object c) {
		return c != null && (!(c instanceof String) || ((String) c).length() > 0);
	}
}
