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/*******************************************************************************
* Copyright (c) 2000, 2004 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.help.internal.base.util;
import java.io.*;
import java.util.Properties;
import org.eclipse.core.runtime.*;
import org.eclipse.help.internal.*;
/**
* Properties stored in file.
*/
public class HelpProperties extends Properties {
private static final long serialVersionUID = 1L;
private File file = null;
protected String name = null;
/**
* Creates empty Properties for the specified plugin
*
* @param name
* name of the file;
* @param plugin
* the plugin
*/
public HelpProperties(String name, Plugin plugin) {
this(name, plugin.getStateLocation().toFile());
}
/**
* Creates empty Properties persisted in the specified directory
*
* @param name
* name of the file;
* @param dir
* directory to persist file in
*/
public HelpProperties(String name, File dir) {
super();
this.name = name;
file = new File(dir, name);
}
/**
* Restores contents of the Properties from a file.
*
* @return true if persistant data was read in
*/
public boolean restore() {
InputStream in = null;
boolean loaded = false;
clear();
// Test if we have a contribution file to start with
// If this is a clean start, then we will not have a
// contribution file. return false.
if (!file.exists())
return loaded;
try {
in = new FileInputStream(file);
super.load(in);
loaded = true;
} catch (IOException ioe00) {
HelpPlugin.logError("File " + file.getName() + " cannot be read.", //$NON-NLS-1$ //$NON-NLS-2$
null);
} finally {
if (in != null)
try {
in.close();
} catch (IOException ioe10) {
}
}
return loaded;
}
/**
* Saves contents of the table to a file.
*
* @return true if operation was successful
*/
public boolean save() {
OutputStream out = null;
boolean ret = false;
try {
out = new FileOutputStream(file);
super.store(out, "This is a generated file; do not edit."); //$NON-NLS-1$
ret = true;
} catch (IOException ioe00) {
HelpPlugin.logError("Exception occurred while saving table " + name //$NON-NLS-1$
+ " to file " + file.getAbsolutePath() + ".", ioe00); //$NON-NLS-1$ //$NON-NLS-2$
} finally {
try {
if (out != null) {
out.close();
}
} catch (IOException ioe01) {
}
}
return ret;
}
}
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