/*
- * Copyright 2006 the original author or authors.
- *
+ * Copyright 2005-2010 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.wamblee.io;
import org.apache.commons.logging.Log;
import java.util.Map;
import java.util.Set;
-
/**
* Monitors a directory for changes.
- *
+ *
* @author Erik Brakkee
*/
public class DirectoryMonitor {
- /**
- * DOCUMENT ME!
- */
private static final Log LOG = LogFactory.getLog(DirectoryMonitor.class);
- /**
- * DOCUMENT ME!
- */
private File directory;
- /**
- * DOCUMENT ME!
- */
private FileFilter filter;
- /**
- * DOCUMENT ME!
- */
private Listener listener;
- /**
- * DOCUMENT ME!
- */
private Map<File, Date> contents;
-/**
+ /**
* Creates a new DirectoryMonitor object.
- *
- * @param aDirectory DOCUMENT ME!
- * @param aFilefilter DOCUMENT ME!
- * @param aListener DOCUMENT ME!
+ *
*/
public DirectoryMonitor(File aDirectory, FileFilter aFilefilter,
Listener aListener) {
directory = aDirectory;
if (!directory.isDirectory()) {
- throw new IllegalArgumentException("Directory '" + directory
- + "' does not exist");
+ throw new IllegalArgumentException("Directory '" + directory +
+ "' does not exist");
}
- filter = aFilefilter;
- listener = aListener;
- contents = new HashMap<File, Date>();
+ filter = aFilefilter;
+ listener = aListener;
+ contents = new HashMap<File, Date>();
}
/**
- * Polls the directory for changes and notifies the listener of any
- * changes. In case of any exceptions thrown by the listener while
- * handling the changes, the next call to this method will invoked the
- * listeners again for the same changes.
+ * Polls the directory for changes and notifies the listener of any changes.
+ * In case of any exceptions thrown by the listener while handling the
+ * changes, the next call to this method will invoked the listeners again
+ * for the same changes.
*/
public void poll() {
LOG.debug("Polling " + directory);
- Map<File, Date> newContents = new HashMap<File, Date>();
- File[] files = directory.listFiles(filter);
+ Map<File, Date> newContents = new HashMap<File, Date>();
+ File[] files = directory.listFiles(filter);
- // Check deleted files.
- Set<File> deletedFiles = new HashSet<File>(contents.keySet());
+ // Check deleted files.
+ Set<File> deletedFiles = new HashSet<File>(contents.keySet());
for (File file : files) {
if (file.isFile()) {