ch.qos.cal10n.util.CAL10NResourceBundle Maven / Gradle / Ivy
/*
* Copyright (c) 2009 QOS.ch All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package ch.qos.cal10n.util;
import java.io.File;
import java.io.IOException;
import java.io.Reader;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Map;
import java.util.ResourceBundle;
import java.util.concurrent.ConcurrentHashMap;
/**
*
* @author Ceki Gülcü
*
*/
public class CAL10NResourceBundle extends ResourceBundle {
static long CHECK_DELAY = 10 * 60 * 1000; // 10 minutes delay
Map map = new ConcurrentHashMap();
File hostFile;
volatile long nextCheck;
long lastModified;
CAL10NResourceBundle parent;
public CAL10NResourceBundle(Reader r, File file)
throws IOException {
read(r);
this.hostFile = file;
nextCheck = System.currentTimeMillis() + CHECK_DELAY;
}
void read(Reader r) throws IOException {
Parser p = new Parser(r, map);
p.parseAndPopulate();
}
public void setParent(CAL10NResourceBundle parent) {
this.parent = (parent);
}
public boolean hasChanged() {
// if the host file is unknown, no point in a check
if (hostFile == null) {
return false;
}
long now = System.currentTimeMillis();
if (now < nextCheck) {
return false;
} else {
nextCheck = now + CHECK_DELAY;
if (lastModified != hostFile.lastModified()) {
lastModified = hostFile.lastModified();
return true;
} else {
return false;
}
}
}
/**
* WARNING: Used for testing purposes. Do not invoke directly in user code.
*/
public void resetCheckTimes() {
nextCheck = 0;
lastModified = 0;
}
@Override
public Enumeration getKeys() {
Hashtable ht = new Hashtable(map);
if(parent != null) {
ht.putAll(parent.map);
}
return ht.keys();
}
@Override
protected Object handleGetObject(String key) {
if (key == null) {
throw new NullPointerException();
}
Object o = map.get(key);
if(o == null && parent != null) {
o = parent.handleGetObject(key);
}
return o;
}
}