/*
* @(#)Configuration.java 1.6 02/09/03 @(#)
*
* Copyright (c) 2001 Sun Microsystems, Inc. All rights reserved.
* PROPRIETARY/CONFIDENTIAL
* Use is subject to license terms.
*/
package com.sun.midp.main;
/** access the implementation configuration file parameters. */
public class Configuration {
/** Don't let anyone instantiate this class */
private Configuration() {
}
/**
* Gets the implementation property indicated by the specified key.
*
* @param key the name of the implementation property.
* @return the string value of the implementation property,
* or <code>null</code> if there is no property with that key.
*
* @exception NullPointerException if <code>key</code> is
* <code>null</code>.
* @exception IllegalArgumentException if <code>key</code> is empty.
*/
public static String getProperty(String key) {
// If key is null, then a NullPointerException is thrown.
// If key is blank, then throw a specific IllegalArgumentException
if (key.length() == 0) {
throw new IllegalArgumentException("key can't be empty");
}
return getProperty0(key);
}
/**
* Gets the implementation property indicated by the specified key or
* returns the specifid default value.
*
* @param key the name of the implementation property.
* @param def the default value for the property if not
* specified in the configuration files or command
* line over rides.
* @return the string value of the implementation property,
* or <code>null</code> if there is no property with that key.
*
* @exception NullPointerException if <code>key</code> is
* <code>null</code>.
* @exception IllegalArgumentException if <code>key</code> is empty.
*/
public static String getPropertyDefault(String key, String def) {
String result = getProperty(key);
return (result != null ? result : def);
}
/**
* native interface to the configuration parameter storage.
*
* @param key the name of the implementation property.
* @return the string value of the implementation property,
* or <code>null</code> if there is no property with that key.
*/
private native static String getProperty0(String key);
}
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