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/*
* Copyright (c) 2014, 2015 Eike Stepper (Loehne, Germany) and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v2.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v20.html
*
* Contributors:
* Ed Merks - initial API and implementation
*/
package org.eclipse.oomph.util;
import org.eclipse.oomph.internal.util.UtilPlugin;
import java.io.File;
import java.util.LinkedHashMap;
import java.util.Map;
/**
* @author Ed Merks
*/
public class PropertyFile
{
private final File file;
public PropertyFile(File file)
{
this.file = file;
}
public String getProperty(String key, String defaultValue)
{
Map<String, String> properties = loadProperties();
String value = properties.get(key);
return value == null ? defaultValue : value;
}
public void setProperty(String key, String value)
{
Map<String, String> properties = loadProperties();
addAndSaveProperty(properties, key, value);
}
public boolean compareAndSetProperty(String key, String value, String... expectedValues)
{
Map<String, String> properties = loadProperties();
String existingValue = properties.get(key);
if (expectedValues.length == 0)
{
if (ObjectUtil.equals(existingValue, null))
{
addAndSaveProperty(properties, key, value);
return true;
}
}
else
{
for (String expectedValue : expectedValues)
{
if (ObjectUtil.equals(existingValue, expectedValue))
{
addAndSaveProperty(properties, key, value);
return true;
}
}
}
return false;
}
public void removeProperty(String key)
{
Map<String, String> properties = loadProperties();
if (properties.remove(key) != null)
{
saveProperties(properties);
}
}
public Map<String, String> loadProperties()
{
try
{
if (file.exists())
{
return PropertiesUtil.loadProperties(file);
}
}
catch (RuntimeException ex)
{
// Ignore.
}
return new LinkedHashMap<String, String>();
}
public void saveProperties(Map<String, String> properties)
{
try
{
PropertiesUtil.saveProperties(file, properties, true);
}
catch (RuntimeException ex)
{
UtilPlugin.INSTANCE.log(ex);
}
}
private void addAndSaveProperty(Map<String, String> properties, String key, String value)
{
properties.put(key, value.toString());
saveProperties(properties);
}
}
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