From: Erik Brakkee <erik@brakkee.org>
Date: Sat, 31 Jul 2010 12:53:48 +0000 (+0000)
Subject: (no commit message)
X-Git-Tag: wamblee-utils-0.7~133
X-Git-Url: http://wamblee.org/gitweb/?a=commitdiff_plain;h=150369124953929a3c286d1607b7984120b96cb9;p=utils

---

diff --git a/support/general/src/main/java/org/wamblee/general/ObjectElem.java b/support/general/src/main/java/org/wamblee/general/ObjectElem.java
new file mode 100644
index 00000000..dbc9fed8
--- /dev/null
+++ b/support/general/src/main/java/org/wamblee/general/ObjectElem.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2005-2010 the original author or authors.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.wamblee.general;
+
+/**
+ * This class provided an equality operation based on the object reference
+ * of the wrapped object. This is required because we cannto assume that the
+ * equals operation has any meaning for different types of persistent
+ * objects. This allows us to use the standard collection classes for
+ * detecting cyclic dependences and avoiding recursion.
+ */
+public class ObjectElem {
+    private Object object;
+
+    /**
+     * Constructs the wrapper.
+     * @param aObject Object.
+     */
+    public ObjectElem(Object aObject) {
+        object = aObject;
+    }
+
+    public boolean equals(Object aObj) {
+        if (aObj == null) {
+            return false;
+        }
+        if (!(aObj instanceof ObjectElem)) {
+            return false;
+        }
+        return ((ObjectElem) aObj).object == object;
+    }
+
+    public int hashCode() {
+        return object.hashCode();
+    }
+}
\ No newline at end of file