org.apache.tools.ant.types.selectors.modifiedselector.LastModifiedAlgorithm Maven / Gradle / Ivy
/*
* 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
*
* https://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.tools.ant.types.selectors.modifiedselector;
import java.io.File;
/**
* Computes a 'timestamp' of file based on the lastModified time of that file.
*
* @version 2018-07-25
* @since Ant 1.10.6 and 1.9.14
*/
public class LastModifiedAlgorithm implements Algorithm {
/**
* This algorithm doesn't need any configuration.
* Therefore it's always valid.
* @return always true
*/
public boolean isValid() {
return true;
}
/**
* Computes a 'timestamp' for a file based on the lastModified time.
* @param file The file for which the value should be computed
* @return the timestamp or null if the timestamp couldn't be computed
*/
public String getValue(File file) {
long lastModified = file.lastModified();
if (lastModified == 0L) {
return null;
}
return Long.toString(lastModified);
}
}