/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2015 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.mail.util;
import java.util.*;
import javax.mail.Session;
/**
* Utilities to make it easier to get property values.
* Properties can be strings or type-specific value objects.
*
* @author Bill Shannon
*/
public class PropUtil {
// No one should instantiate this class.
private PropUtil() {
}
/**
* Get an integer valued property.
*
* @param props the properties
* @param name the property name
* @param def default value if property not found
* @return the property value
*/
public static int getIntProperty(Properties props, String name, int def) {
return getInt(getProp(props, name), def);
}
/**
* Get a boolean valued property.
*
* @param props the properties
* @param name the property name
* @param def default value if property not found
* @return the property value
*/
public static boolean getBooleanProperty(Properties props,
String name, boolean def) {
return getBoolean(getProp(props, name), def);
}
/**
* Get an integer valued property.
*
* @param session the Session
* @param name the property name
* @param def default value if property not found
* @return the property value
*/
public static int getIntSessionProperty(Session session,
String name, int def) {
return getInt(getProp(session.getProperties(), name), def);
}
/**
* Get a boolean valued property.
*
* @param session the Session
* @param name the property name
* @param def default value if property not found
* @return the property value
*/
public static boolean getBooleanSessionProperty(Session session,
String name, boolean def) {
return getBoolean(getProp(session.getProperties(), name), def);
}
/**
* Get a boolean valued System property.
*
* @param name the property name
* @param def default value if property not found
* @return the property value
*/
public static boolean getBooleanSystemProperty(String name, boolean def) {
try {
return getBoolean(getProp(System.getProperties(), name), def);
} catch (SecurityException sex) {
// fall through...
}
/*
* If we can't get the entire System Properties object because
* of a SecurityException, just ask for the specific property.
*/
try {
String value = System.getProperty(name);
if (value == null)
return def;
if (def)
return !value.equalsIgnoreCase("false");
else
return value.equalsIgnoreCase("true");
} catch (SecurityException sex) {
return def;
}
}
/**
* Get the value of the specified property.
* If the "get" method returns null, use the getProperty method,
* which might cascade to a default Properties object.
*/
private static Object getProp(Properties props, String name) {
Object val = props.get(name);
if (val != null)
return val;
else
return props.getProperty(name);
}
/**
* Interpret the value object as an integer,
* returning def if unable.
*/
private static int getInt(Object value, int def) {
if (value == null)
return def;
if (value instanceof String) {
try {
return Integer.parseInt((String)value);
} catch (NumberFormatException nfex) { }
}
if (value instanceof Integer)
return ((Integer)value).intValue();
return def;
}
/**
* Interpret the value object as a boolean,
* returning def if unable.
*/
private static boolean getBoolean(Object value, boolean def) {
if (value == null)
return def;
if (value instanceof String) {
/*
* If the default is true, only "false" turns it off.
* If the default is false, only "true" turns it on.
*/
if (def)
return !((String)value).equalsIgnoreCase("false");
else
return ((String)value).equalsIgnoreCase("true");
}
if (value instanceof Boolean)
return ((Boolean)value).booleanValue();
return def;
}
}