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/*
* Copyright (c) 1997, 2023 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package org.eclipse.angus.mail.util;
import jakarta.mail.Session;
import java.util.Properties;
import java.util.concurrent.ScheduledExecutorService;
/**
* 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 a ScheduledExecutorService valued property.
*
* @throws ClassCastException if the property value's class is
* not {@link java.util.concurrent.ScheduledThreadPoolExecutor }
* @param props the properties
* @param name the property name
* @return the property value, null if the property is null
*/
public static ScheduledExecutorService getScheduledExecutorServiceProperty(Properties props,
String name) {
return getScheduledExecutorService(getProp(props, name));
}
/**
* 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
*/
@Deprecated
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
*/
@Deprecated
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 {
String s = (String) value;
if (s.startsWith("0x"))
return Integer.parseInt(s.substring(2), 16);
else
return Integer.parseInt(s);
} catch (NumberFormatException nfex) {
}
}
if (value instanceof Integer)
return ((Integer) value).intValue();
return def;
}
private static ScheduledExecutorService getScheduledExecutorService(Object value) {
return (ScheduledExecutorService) value;
}
/**
* 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;
}
}
