/*
 * Copyright 1999-2004 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;

/** An object capable of transforming an input object into some output object.
  *
  * @since 1.0
  * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
  */
public interface Transformer {

    /** Transforms the input object (leaving it unchanged) into some output object.
      * @return the transformation of the input object to the output object
      */
    public Object transform(Object input);
}