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author | Björn Hagemeister | 2014-11-12 15:01:39 +0100 |
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committer | Björn Hagemeister | 2014-11-12 15:01:39 +0100 |
commit | bcc7a3761ce5801d747653f6f97b094c9ccdbb45 (patch) | |
tree | 384c9331c2f0c99ce76608ab628ab02fa8772e7d /src/main/java/org/openslx/util/Util.java | |
parent | Parametrized Enumerator. (diff) | |
download | master-sync-shared-bcc7a3761ce5801d747653f6f97b094c9ccdbb45.tar.gz master-sync-shared-bcc7a3761ce5801d747653f6f97b094c9ccdbb45.tar.xz master-sync-shared-bcc7a3761ce5801d747653f6f97b094c9ccdbb45.zip |
Added class for reading proxy setting from proxy configuration file.
Added class utils for some necessary tools, used in ProxyConfiguration.
Diffstat (limited to 'src/main/java/org/openslx/util/Util.java')
-rw-r--r-- | src/main/java/org/openslx/util/Util.java | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/src/main/java/org/openslx/util/Util.java b/src/main/java/org/openslx/util/Util.java new file mode 100644 index 0000000..9f98007 --- /dev/null +++ b/src/main/java/org/openslx/util/Util.java @@ -0,0 +1,74 @@ +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 ) { + } + } + } +} |