io.methvin.watchservice.WatchablePath Maven / Gradle / Ivy
/**
* 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 io.methvin.watchservice;
import java.io.IOException;
import java.nio.file.Path;
import java.nio.file.ProviderMismatchException;
import java.nio.file.WatchEvent;
import java.nio.file.WatchKey;
import java.nio.file.WatchService;
import java.nio.file.Watchable;
import java.util.Arrays;
public class WatchablePath implements Watchable {
private final Path file;
public WatchablePath(Path file) {
if (file == null) {
throw new NullPointerException("file must not be null");
}
this.file = file;
}
public Path getFile() {
return file;
}
@Override
public WatchKey register(WatchService watcher,
WatchEvent.Kind[] events,
WatchEvent.Modifier... modifiers)
throws IOException {
if (watcher == null) {
throw new NullPointerException();
}
if (!(watcher instanceof AbstractWatchService)) {
throw new ProviderMismatchException();
}
return ((AbstractWatchService) watcher).register(this, Arrays.asList(events));
}
private static final WatchEvent.Modifier[] NO_MODIFIERS = new WatchEvent.Modifier[0];
@Override
public final WatchKey register(WatchService watcher,
WatchEvent.Kind... events)
throws IOException {
if (!file.toFile().exists()) {
throw new RuntimeException("Directory to watch doesn't exist: " + file);
}
return register(watcher, events, NO_MODIFIERS);
}
@Override
public String toString() {
return "Path{" +
"file=" + file +
'}';
}
}