Adding JMCR-Stable version

[Benchmarks_CSolver.git] / JMCR-Stable / real-world application / derby-10.3.2.1 / java / engine / org / apache / derby / iapi / services / io / FormatIdUtil.java

diff --git a/JMCR-Stable/real-world application/derby-10.3.2.1/java/engine/org/apache/derby/iapi/services/io/FormatIdUtil.java b/JMCR-Stable/real-world application/derby-10.3.2.1/java/engine/org/apache/derby/iapi/services/io/FormatIdUtil.java
new file mode 100644 (file)
index 0000000..2d49719
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+++ b/JMCR-Stable/real-world application/derby-10.3.2.1/java/engine/org/apache/derby/iapi/services/io/FormatIdUtil.java
@@ -0,0 +1,79 @@
+/*\r
+\r
+   Derby - Class org.apache.derby.iapi.services.io.FormatIdUtil\r
+\r
+   Licensed to the Apache Software Foundation (ASF) under one or more\r
+   contributor license agreements.  See the NOTICE file distributed with\r
+   this work for additional information regarding copyright ownership.\r
+   The ASF licenses this file to you under the Apache License, Version 2.0\r
+   (the "License"); you may not use this file except in compliance with\r
+   the License.  You may obtain a copy of the License at\r
+\r
+      http://www.apache.org/licenses/LICENSE-2.0\r
+\r
+   Unless required by applicable law or agreed to in writing, software\r
+   distributed under the License is distributed on an "AS IS" BASIS,\r
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
+   See the License for the specific language governing permissions and\r
+   limitations under the License.\r
+\r
+ */\r
+\r
+package org.apache.derby.iapi.services.io;\r
+\r
+import java.io.DataInput;\r
+import java.io.DataOutput;\r
+import java.io.IOException;\r
+\r
+/**\r
+  Utility class with static methods for constructing and reading the byte array\r
+  representation of format id's.\r
+\r
+  <P>This utility supports a number of families of format ids. The byte array\r
+  form of each family is a different length. In all cases the first two bits\r
+  of the first byte indicate the family for an id. The list below describes\r
+  each family and gives its two bit identifier in parens.\r
+\r
+  <UL> \r
+  <LI> (0) - The format id is a one byte number between 0 and 63 inclusive. \r
+             The byte[] encoding fits in one byte.\r
+  <LI> (1) - The format id is a two byte number between 16384 to 32767\r
+             inclusive. The byte[] encoding stores the high order byte\r
+                        first. \r
+  <LI> (2) - The format id is four byte number between 2147483648 and\r
+             3221225471 inclusive. The byte[] encoding stores the high\r
+                        order byte first.\r
+  <LI> (3) - Future expansion.\r
+  </UL>\r
+ */\r
+public final class FormatIdUtil\r
+{\r
+       private FormatIdUtil() {\r
+       }\r
+\r
+       public static int getFormatIdByteLength(int formatId) {\r
+                       return 2;\r
+       }\r
+\r
+       public static void writeFormatIdInteger(DataOutput out, int formatId) throws IOException {\r
+               out.writeShort(formatId);\r
+       }\r
+\r
+       public static int readFormatIdInteger(DataInput in)\r
+               throws IOException {\r
+\r
+               return in.readUnsignedShort();\r
+       }\r
+\r
+       public static int readFormatIdInteger(byte[] data) {\r
+\r
+               int a = data[0];\r
+               int b = data[1];\r
+               return (((a & 0xff) << 8) | (b & 0xff));\r
+       }\r
+\r
+       public static String formatIdToString(int fmtId) {\r
+\r
+               return Integer.toString(fmtId);\r
+       }\r
+}\r