Revision: 1207
Author: jhoskens
Date: 2006-06-21 02:08:04 -0700 (Wed, 21 Jun 2006)
ViewCVS: http://svn.sourceforge.net/spring-rich-c/?rev=1207&view=rev
Log Message:
-----------
Added XOR: patch from issue RCP-370
Added Paths:
-----------
trunk/spring-richclient/support/src/main/java/org/springframework/rules/constraint/XOr.java
Added:
trunk/spring-richclient/support/src/main/java/org/springframework/rules/constraint/XOr.java
===================================================================
---
trunk/spring-richclient/support/src/main/java/org/springframework/rules/constraint/XOr.java
(rev 0)
+++
trunk/spring-richclient/support/src/main/java/org/springframework/rules/constraint/XOr.java
2006-06-21 09:08:04 UTC (rev 1207)
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2002-2006 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.springframework.rules.constraint;
+
+import java.util.Iterator;
+
+import org.springframework.core.closure.Constraint;
+
+/**
+ * A "xor" compound constraint (aka exclusive disjunction).
+ *
+ * @author Mathias Broekelmann
+ *
+ */
+public class XOr extends CompoundConstraint {
+
+ /**
+ * Creates a empty UnaryOr disjunction.
+ */
+ public XOr() {
+ super();
+ }
+
+ /**
+ * "Ors" two constraints.
+ *
+ * @param constraint1
+ * The first constraint.
+ * @param constraint2
+ * The second constraint.
+ */
+ public XOr(Constraint constraint1, Constraint constraint2) {
+ super(constraint1, constraint2);
+ }
+
+ /**
+ * "Ors" the specified constraints.
+ *
+ * @param constraints
+ * The constraints
+ */
+ public XOr(Constraint[] constraints) {
+ super(constraints);
+ }
+
+ /**
+ * Tests if any of the constraints aggregated by this compound constraint
test
+ * <code>true</code>.
+ *
+ * @see org.springframework.core.closure.Constraint#test(java.lang.Object)
+ */
+ public boolean test(Object value) {
+ boolean found = false;
+ for (Iterator i = iterator(); i.hasNext();) {
+ if (((Constraint) i.next()).test(value)) {
+ if (found) {
+ return false;
+ }
+ found = true;
+ }
+ }
+ return found;
+ }
+
+}
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