Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.utils.datastructures / src / org / simantics / utils / datastructures / Pair2.java

diff --git a/bundles/org.simantics.utils.datastructures/src/org/simantics/utils/datastructures/Pair2.java b/bundles/org.simantics.utils.datastructures/src/org/simantics/utils/datastructures/Pair2.java
new file mode 100644 (file)
index 0000000..d5217e6
--- /dev/null
+++ b/bundles/org.simantics.utils.datastructures/src/org/simantics/utils/datastructures/Pair2.java
@@ -0,0 +1,78 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+/*\r
+ *\r
+ * @author Toni Kalajainen\r
+ */\r
+package org.simantics.utils.datastructures;\r
+\r
+import org.simantics.utils.datastructures.internal.ObjectUtils;\r
+import org.simantics.utils.datastructures.map.Tuple;\r
+\r
+/**\r
+ * A generic Pair (2-tuple) structure for containing two object instances of\r
+ * chosen types.\r
+ * \r
+ * Allows nulls\r
+ * \r
+ * @param <T1> type of first element\r
+ * @param <T2> type of second element\r
+ * @deprecated Replaced with {@link Tuple}\r
+ */\r
+public final class Pair2<T1, T2> {\r
+    public final T1 first;\r
+    public final T2 second;\r
+    private final int hash;\r
+\r
+    public static <T1, T2> Pair2<T1, T2> make(T1 t1, T2 t2) {\r
+        return new Pair2<T1, T2>(t1, t2);\r
+    }\r
+\r
+    public Pair2(T1 first, T2 second) {\r
+        this.first = first;\r
+        this.second = second;\r
+        this.hash = makeHash();\r
+    }\r
+    \r
+    @Override\r
+    public boolean equals(Object obj) {\r
+        if (obj == null)\r
+            return false;\r
+        if (!(obj.getClass().equals(this.getClass())))\r
+            return false;\r
+        Pair2<?, ?> other = (Pair2<?, ?>) obj;\r
+        if (!ObjectUtils.objectEquals(other.first, first))\r
+            return false;\r
+        if (!ObjectUtils.objectEquals(other.second, second))\r
+            return false;\r
+        return true;\r
+    }\r
+    \r
+    @Override\r
+    public int hashCode() {\r
+        return hash;\r
+    }\r
+    \r
+    @Override\r
+    public String toString() {\r
+        return "<"+first+", "+second+">";\r
+    }\r
+    \r
+    private int makeHash() {\r
+       int result = 0;\r
+       if (first!=null)\r
+               result ^= first.hashCode();\r
+       if (second!=null)\r
+               result ^= second.hashCode();\r
+        return result;\r
+    }\r
+}\r