/*
*
*
* Copyright 1990-2007 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* 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 version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*/
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 specified 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>def</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);
}
/**
* Gets the implementation property indicated by the specified key or
* returns the specified default value as an positive int.
*
* @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 int value of the implementation property,
* or <code>def</code> if there is no property with that key or
* the config value is not a positive int (zero is not
* positive).
*
* @exception NullPointerException if <code>key</code> is
* <code>null</code>.
* @exception IllegalArgumentException if <code>key</code> is empty.
*/
public static int getPositiveIntProperty(String key, int def) {
int temp = getIntProperty(key, def);
if (temp > 0) {
return temp;
}
return def;
}
/**
* Gets the implementation property indicated by the specified key or
* returns the specified default value as an non-zero int.
*
* @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 int value of the implementation property,
* or <code>def</code> if there is no property with that key or
* the config value is not an int.
*
* @exception NullPointerException if <code>key</code> is
* <code>null</code>.
* @exception IllegalArgumentException if <code>key</code> is empty.
*/
public static int getNonNegativeIntProperty(String key, int def) {
int temp = getIntProperty(key, def);
if (temp >= 0) {
return temp;
}
return def;
}
/**
* Gets the implementation property indicated by the specified key or
* returns the specified default value as an int.
*
* @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 int value of the implementation property,
* or <code>def</code> if there is no property with that key or
* the config value is not an int.
*
* @exception NullPointerException if <code>key</code> is
* <code>null</code>.
* @exception IllegalArgumentException if <code>key</code> is empty.
*/
public static int getIntProperty(String key, int def) {
/*
* Get the maximum number of persistent connections
* from the configuration file.
*/
String prop = getProperty(key);
if (prop == null) {
return def;
}
try {
int temp = Integer.parseInt(prop);
return temp;
} catch (NumberFormatException nfe) {
// keep the default
}
return 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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