/*******************************************************************************
* Copyright (c) 2000, 2005 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.core.internal.resources;
import java.io.*;
import java.util.Properties;
import java.util.Set;
import org.eclipse.core.internal.utils.Messages;
import org.eclipse.core.resources.IResourceStatus;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.*;
/**
* Represents a table of keys and paths used by a plugin to maintain its configuration files' names.
*/
public class SafeFileTable {
protected IPath location;
protected Properties table;
public SafeFileTable(String pluginId) throws CoreException {
location= getWorkspace().getMetaArea().getSafeTableLocationFor(pluginId);
restore();
}
public IPath[] getFiles() {
Set set= table.keySet();
String[] keys= (String[])set.toArray(new String[set.size()]);
IPath[] files= new IPath[keys.length];
for (int i= 0; i < keys.length; i++)
files[i]= new Path(keys[i]);
return files;
}
protected Workspace getWorkspace() {
return (Workspace)ResourcesPlugin.getWorkspace();
}
public IPath lookup(IPath file) {
String result= table.getProperty(file.toOSString());
return result == null ? null : new Path(result);
}
public void map(IPath file, IPath aLocation) {
if (aLocation == null)
table.remove(file);
else
table.setProperty(file.toOSString(), aLocation.toOSString());
}
public void restore() throws CoreException {
java.io.File target= location.toFile();
table= new Properties();
if (!target.exists())
return;
try {
FileInputStream input= new FileInputStream(target);
try {
table.load(input);
} finally {
input.close();
}
} catch (IOException e) {
String message= Messages.resources_exSafeRead;
throw new ResourceException(IResourceStatus.INTERNAL_ERROR, null, message, e);
}
}
public void save() throws CoreException {
java.io.File target= location.toFile();
try {
FileOutputStream output= new FileOutputStream(target);
try {
table.store(output, "safe table"); //$NON-NLS-1$
} finally {
output.close();
}
} catch (IOException e) {
String message= Messages.resources_exSafeSave;
throw new ResourceException(IResourceStatus.INTERNAL_ERROR, null, message, e);
}
}
public void setLocation(IPath location) {
if (location != null)
this.location= location;
}
}