Changeset 375

Timestamp:

01/31/12 11:56:10 (12 years ago)

Author:

sherbold

Message:

• added methods targetEquals and targetHashCode to de.ugoe.cs.eventbench.data.Event. These methods are used by equals/hashCode to compare target strings/generate the hashCode for the target string. Subclasses can override these methods to customize target comparisons, e.g., to allow that not all parts of a target string need to be equal

File:

• trunk/EventBenchCore/src/de/ugoe/cs/eventbench/data/Event.java (modified) (3 diffs)

trunk/EventBenchCore/src/de/ugoe/cs/eventbench/data/Event.java

@@ -227 +227 @@
                         hash = multiplier * hash + type.hashCode();
                 }
-                if (target != null) {
-                        hash = multiplier * hash + target.hashCode();
-                }
+                hash = multiplier * hash + targetHashCode();
 
                 return hash;
@@ -296 +294 @@
          * 
          * @param otherTarget
-         * @return
+         *            other target string to which the target if this event is
+         *            compared to
+         * @return true if the targets are equals; false otherwise
          */
         protected boolean targetEquals(String otherTarget) {
@@ -307 +307 @@
                 return retVal;
         }
+
+        /**
+         * <p>
+         * This function is used by {@link #hashCode()} to determine how the hash of
+         * the {@link #target}. It has to be overridden by subclasses that implement
+         * {@link #targetEquals(String)}, to ensure that the equals/hashCode
+         * contract remains valid.
+         * </p>
+         * 
+         * @return hash of the target
+         */
+        protected int targetHashCode() {
+                if (target != null) {
+                        return target.hashCode();
+                } else {
+                        return 0;
+                }
+        }
 }