- /*
- * Copyright 2001-2004 The Apache Software Foundation
- *
- * 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 org.apache.commons.collections.functors;
-
- import java.io.Serializable;
-
- import org.apache.commons.collections.Closure;
- import org.apache.commons.collections.Transformer;
-
- /**
- * Closure implementation that calls a Transformer using the input object
- * and ignore the result.
- *
- * @since Commons Collections 3.0
- * @version $Revision: 1.5 $ $Date: 2004/05/16 11:47:38 $
- *
- * @author Stephen Colebourne
- */
- public class TransformerClosure implements Closure, Serializable {
-
- /** Serial version UID */
- static final long serialVersionUID = -5194992589193388969L;
-
- /** The transformer to wrap */
- private final Transformer iTransformer;
-
- /**
- * Factory method that performs validation.
- * <p>
- * A null transformer will return the <code>NOPClosure</code>.
- *
- * @param transformer the transformer to call, null means nop
- * @return the <code>transformer</code> closure
- */
- public static Closure getInstance(Transformer transformer) {
- if (transformer == null) {
- return NOPClosure.INSTANCE;
- }
- return new TransformerClosure(transformer);
- }
-
- /**
- * Constructor that performs no validation.
- * Use <code>getInstance</code> if you want that.
- *
- * @param transformer the transformer to call, not null
- */
- public TransformerClosure(Transformer transformer) {
- super();
- iTransformer = transformer;
- }
-
- /**
- * Executes the closure by calling the decorated transformer.
- *
- * @param input the input object
- */
- public void execute(Object input) {
- iTransformer.transform(input);
- }
-
- /**
- * Gets the transformer.
- *
- * @return the transformer
- * @since Commons Collections 3.1
- */
- public Transformer getTransformer() {
- return iTransformer;
- }
-
- }