[Schmitzm-commits] r1938 - trunk/schmitzm-core/src/main/java/de/schmitzm/lang

[scm-commit at wald.intevation.org]

Author: mojays
Date: 2012-04-04 23:26:53 +0200 (Wed, 04 Apr 2012)
New Revision: 1938

Modified:
   trunk/schmitzm-core/src/main/java/de/schmitzm/lang/LangUtil.java
Log:
LangUtil: combineDate(.) by Date and day millis.

Modified: trunk/schmitzm-core/src/main/java/de/schmitzm/lang/LangUtil.java
===================================================================
--- trunk/schmitzm-core/src/main/java/de/schmitzm/lang/LangUtil.java	2012-04-04 15:43:10 UTC (rev 1937)
+++ trunk/schmitzm-core/src/main/java/de/schmitzm/lang/LangUtil.java	2012-04-04 21:26:53 UTC (rev 1938)
@@ -359,7 +359,25 @@
 		return combinedDateCal.getTime();
 	}
 
-	/**
+    /**
+     * Returns a new date which combines the date and time information of several date objects.
+     * 
+     * @param date
+     *            date the date information is taken from
+     * @param time
+     *            time in milliseconds of day
+     */
+    public static Date combineDate(Date date, long timeMillis) {
+      GregorianCalendar cal = new GregorianCalendar();
+      cal.set(Calendar.HOUR_OF_DAY, (int)(timeMillis/LangUtil.HOUR_MILLIS) );
+      cal.set(Calendar.MINUTE,      (int)((timeMillis%LangUtil.HOUR_MILLIS)/LangUtil.MIN_MILLIS) );
+      cal.set(Calendar.SECOND,      (int)((timeMillis%LangUtil.MIN_MILLIS)/LangUtil.SEC_MILLIS) );
+      cal.set(Calendar.MILLISECOND, (int)(timeMillis%LangUtil.SEC_MILLIS) );
+      Date time = cal.getTime();
+      return combineDate(date, time);
+    }
+
+    /**
 	 * Returns a {@link Date} which represents the given day and time in GMT time zone.<br>
 	 * <b>For example:</b><br>
 	 * The given date is 01.01.2011, 00:00 (in CET). Then this method returns 01.01.2011, 01:00, because the timezone
@@ -827,7 +845,31 @@
 	  return destMap;
 	}
 
-	/**
+    /**
+     * Transforms map keys according to a mapping.
+     * @param sourceMap source map
+     * @param mapping   mapping from destination key to source key (if mapping contains
+     *                  no value for a key of source map, the value is irgnored)
+     * @param destMap   destination map to put the values in (if {@code null} a new
+     *                  {@link HashMap} is created)
+     * @return {@code sourceMap} if mapping is {@code null}
+     */
+    public static <K,V> Map<K,V> transformMapKeysInverted(Map<K,V> sourceMap, Map<K,K> mapping, Map<K,V> destMap) {
+      if ( mapping == null )
+        return sourceMap;
+      if ( destMap == null )
+        destMap = new HashMap<K,V>();  
+      for (K destKey : mapping.keySet()) {
+        K sourceKey = mapping.get(destKey);
+        if ( sourceKey != null ) {
+          V  value  = sourceMap.get(sourceKey);
+          destMap.put(destKey,value);
+        }
+      }
+      return destMap;
+    }
+
+    /**
 	 * Erzeugt einen vorbelegten Array.
 	 * 
 	 * @param count