Mega Code Archive
Gets strong-type-value property from a standard Properties
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specific language governing permissions and limitations
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*/
import java.security.SecureRandom;
import java.util.Properties;
import java.util.Random;
public class StringUtils
{
/**
* Gets an integer-valued property from a standard Properties
* list. If the value does not exist, or is a non-integer, returns defVal.
*
* @since 2.1.48.
* @param props The property set to look through
* @param key The key to look for
* @param defVal If the property is not found or is a non-integer, returns this value.
* @return The property value as an integer (or defVal).
*/
public static int getIntegerProperty( Properties props,
String key,
int defVal )
{
String val = props.getProperty( key );
return parseIntParameter( val, defVal );
}
/**
* Gets a boolean property from a standard Properties list.
* Returns the default value, in case the key has not been set.
* <P>
* The possible values for the property are "true"/"false", "yes"/"no", or
* "on"/"off". Any value not recognized is always defined as "false".
*
* @param props A list of properties to search.
* @param key The property key.
* @param defval The default value to return.
*
* @return True, if the property "key" was set to "true", "on", or "yes".
*
* @since 2.0.11
*/
public static boolean getBooleanProperty( Properties props,
String key,
boolean defval )
{
String val = props.getProperty( key );
if( val == null ) return defval;
return isPositive( val );
}
/**
* Fetches a String property from the set of Properties. This differs from
* Properties.getProperty() in a couple of key respects: First, property value
* is trim()med (so no extra whitespace back and front), and well, that's it.
*
* @param props The Properties to search through
* @param key The property key
* @param defval A default value to return, if the property does not exist.
* @return The property value.
* @since 2.1.151
*/
public static String getStringProperty( Properties props,
String key,
String defval )
{
String val = props.getProperty( key );
if( val == null ) return defval;
return val.trim();
}
/**
* Returns true, if the string "val" denotes a positive string. Allowed
* values are "yes", "on", and "true". Comparison is case-insignificant.
* Null values are safe.
*
* @param val Value to check.
* @return True, if val is "true", "on", or "yes"; otherwise false.
*
* @since 2.0.26
*/
public static boolean isPositive( String val )
{
if( val == null ) return false;
val = val.trim();
return val.equalsIgnoreCase("true") || val.equalsIgnoreCase("on") ||
val.equalsIgnoreCase("yes");
}
/**
* Parses an integer parameter, returning a default value
* if the value is null or a non-number.
*
* @param value The value to parse
* @param defvalue A default value in case the value is not a number
* @return The parsed value (or defvalue).
*/
public static int parseIntParameter( String value, int defvalue )
{
int val = defvalue;
try
{
val = Integer.parseInt( value.trim() );
}
catch( Exception e ) {}
return val;
}
}
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