/*
* Copyright 2015-2016 the original author or authors.
*
* 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.springframework.integration.file.filters;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;
/**
* The {@link FileListFilter} implementation to filter those files which
* {@link File#lastModified()} is less than the {@link #age} in comparison
* with the current time.
* <p>
* The resolution is done in seconds.
*
* @author Gary Russell
* @author Artem Bilan
* @since 4.2
*
*/
public class LastModifiedFileListFilter implements FileListFilter<File> {
private static final long DEFAULT_AGE = 60;
private volatile long age = DEFAULT_AGE;
public long getAge() {
return this.age;
}
public LastModifiedFileListFilter() {
}
/**
* Construct a {@link LastModifiedFileListFilter} instance with provided {@link #age}.
* Defaults to 60 seconds.
* @param age the age in seconds.
* @since 5.0
*/
public LastModifiedFileListFilter(long age) {
this.age = age;
}
/**
* Set the age that files have to be before being passed by this filter.
* If {@link File#lastModified()} plus age is greater than the current time, the file
* is filtered. The resolution is seconds.
* Defaults to 60 seconds.
* @param age the age
*/
public void setAge(long age) {
setAge(age, TimeUnit.SECONDS);
}
/**
* Set the age that files have to be before being passed by this filter.
* If {@link File#lastModified()} plus age is greater than the current time, the file
* is filtered. The resolution is seconds.
* Defaults to 60 seconds.
* @param age the age
* @param unit the timeUnit.
*/
public void setAge(long age, TimeUnit unit) {
this.age = unit.toSeconds(age);
}
@Override
public List<File> filterFiles(File[] files) {
List<File> list = new ArrayList<File>();
long now = System.currentTimeMillis() / 1000;
for (File file : files) {
if (file.lastModified() / 1000 + this.age <= now) {
list.add(file);
}
}
return list;
}
}