0.8.1-rc1/metadata/src/main/java/org/apache/oodt/cas/metadata/preconditions/EndsWithComparator.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.oodt.cas.metadata.preconditions;

//JDK imports
import java.io.File;

//OODT imports
import org.apache.oodt.cas.metadata.exceptions.PreconditionComparatorException;
import org.apache.oodt.cas.metadata.preconditions.PreConditionComparator;

/**
 * 
 * A {@link PreConditionComparator} that checks a file's extension and then
 * skips extracting metadata from files that don't match this extension.
 * 
 * @author mattmann
 * @version $Revision$
 * 
 */
public class EndsWithComparator extends PreConditionComparator<String> {

  /*
   * (non-Javadoc)
   * 
   * @see
   * org.apache.oodt.cas.metadata.preconditions.PreConditionComparator#performCheck
   * (java.io.File, java.lang.Object)
   */
  @Override
  protected int performCheck(File file, String ext)
      throws PreconditionComparatorException {
    return file.getName().substring(file.getName().lastIndexOf(".") + 1)
        .compareTo(ext);
  }

}