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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.
*/
public static int getIntProperty(Properties props, String name, int def) {
return getInt(props.get(name), def);
}
/**
* Get a boolean valued property.
*/
public static boolean getBooleanProperty(Properties props,
String name, boolean def) {
return getBoolean(props.get(name), def);
}
/**
* Get an integer valued property.
*/
public static int getIntSessionProperty(Session session,
String name, int def) {
return getInt(session.getProperties().get(name), def);
}
/**
* Get a boolean valued property.
*/
public static boolean getBooleanSessionProperty(Session session,
String name, boolean def) {
return getBoolean(session.getProperties().get(name), def);
}
/**
* Get a boolean valued System property.
*/
public static boolean getBooleanSystemProperty(String name, boolean def) {
try {
return getBoolean(System.getProperties().get(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;
}
}
/**
* 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;
}
}
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