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package org.openslx.util;
import java.io.Closeable;
import org.apache.log4j.Logger;
import org.openslx.util.Util;
public class Util
{
private static Logger log = Logger.getLogger( Util.class );
/**
* Check if the given object is null, abort program if true. An optional
* message to be printed can be passed. A stack trace will be printed, too.
* Finally the application terminates with exit code 2.
*
* This comes in handy if something must not be null, and you want user
* friendly output. A perfect example would be reading settings from a
* config file. You can use this on mandatory fields.
*
* @param something
* the object to compare to null
* @param message
* the message to be printed if something is null
*/
public static void notNullFatal( Object something, String message )
{
if ( something == null ) {
if ( message != null )
log.fatal( "[NOTNULL] " + message );
log.warn( Thread.currentThread().getStackTrace().toString() );
System.exit( 2 );
}
}
public static void notNullOrEmptyFatal( String something, String message )
{
if ( something == null || something.isEmpty() ) {
if ( message != null )
log.fatal( "[NOTNULL] " + message );
log.warn( Thread.currentThread().getStackTrace().toString() );
System.exit( 2 );
}
}
/**
* Tries to parse an int. Returns 0 on error.
*
* @param s
* The string to parse
* @return The parsed int or 0 on error
*/
public static int tryToParseInt( String s )
{
try {
return Integer.parseInt( s );
} catch ( NumberFormatException e ) {
return 0;
}
}
public static void streamClose( Closeable... closeable )
{
for ( Closeable c : closeable ) {
if ( c == null )
continue;
try {
c.close();
} catch ( Throwable t ) {
}
}
}
}
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