--- /dev/null
+/*
+ * 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();
+ }
+}
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