/*
* TV-Browser
* Copyright (C) 04-2003 Martin Oberhauser (darras@users.sourceforge.net)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* CVS information:
* $RCSfile$
* $Source$
* $Date: 2010-08-18 14:07:16 +0200 (Wed, 18 Aug 2010) $
* $Author: ds10 $
* $Revision: 6707 $
*/
package util.settings;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Properties;
import java.util.logging.Logger;
import tvbrowser.TVBrowser;
import util.io.stream.OutputStreamProcessor;
import util.io.stream.StreamUtilities;
/**
*
*
* @author Til Schneider, www.murfman.de
*/
public class PropertyManager {
private static final Logger mLog
= Logger.getLogger(PropertyManager.class.getName());
private Properties mProperties;
private HashMap<String, Property> mPropertyHash;
private HashSet<String> mChangedKeySet;
public PropertyManager() {
mProperties = new Properties();
mPropertyHash = new HashMap<String, Property>();
mChangedKeySet = new HashSet<String>();
}
public void writeToFile(File settingsFile) throws IOException {
if(TVBrowser.isTransportable()) {
mProperties.remove("dir.tvdata");
mProperties.remove("dir.plugins");
}
StreamUtilities.outputStream(settingsFile, new OutputStreamProcessor() {
public void process(OutputStream outputStream) throws IOException {
mProperties.store(outputStream, null);
}
});
}
public void readFromFile(File settingsFile) throws IOException {
BufferedInputStream in = null;
try {
in = new BufferedInputStream(new FileInputStream(settingsFile), 0x4000);
mProperties.load(in);
if(TVBrowser.isTransportable()) {
if(!mProperties.getProperty("dir.tvdata","./settings/tvdata").startsWith("./settings/tvdata")) {
mProperties.setProperty("dir.tvdata","./settings/tvdata");
}
mProperties.remove("dir.plugins");
}
clearCaches();
removeUnknownEntries();
}
finally {
if (in != null) {
in.close();
}
}
if(mProperties.isEmpty()) {
throw new IOException("Settings file is empty!");
}
}
void addProperty(Property prop) {
mPropertyHash.put(prop.getKey(), prop);
}
void setProperty(String key, String value) {
String oldVal = getProperty(key);
boolean equalsOld = (oldVal == null) ? (value == null) : oldVal
.equals(value);
if (! equalsOld) {
if (value == null) {
mProperties.remove(key);
} else {
mProperties.setProperty(key, value);
}
mChangedKeySet.add(key);
}
}
/**
* Gets the property with the given key.
*
* @param key The key to get the property for.
* @return The property for the key or <code>null</code>
* if the key didn't exists.
*/
public String getProperty(String key) {
return mProperties.getProperty(key);
}
public boolean hasChanged(Property prop) {
return mChangedKeySet.contains(prop.getKey());
}
public boolean hasChanged(Property[] propArr) {
for (Property element : propArr) {
if (mChangedKeySet.contains(element.getKey())) {
return true;
}
}
return false;
}
public void clearChanges() {
mChangedKeySet.clear();
}
private void clearCaches() {
Iterator<Property> iter = mPropertyHash.values().iterator();
while (iter.hasNext()) {
Property prop = iter.next();
prop.clearCache();
}
}
private void removeUnknownEntries() {
Iterator<Object> iter = mProperties.keySet().iterator();
while (iter.hasNext()) {
String key = (String) iter.next();
// Check whether this key is known
boolean isKnown = (mPropertyHash.get(key) != null);
if (! isKnown) {
mLog.info("Removing unknown setting: " + key + " ("
+ mProperties.get(key) + ")");
iter.remove();
}
}
}
}