Adding JMCR-Stable version

[Benchmarks_CSolver.git] / JMCR-Stable / real-world application / MyDerby-10.3 / java / engine / org / apache / derby / impl / io / DirStorageFactory4.java

diff --git a/JMCR-Stable/real-world application/MyDerby-10.3/java/engine/org/apache/derby/impl/io/DirStorageFactory4.java b/JMCR-Stable/real-world application/MyDerby-10.3/java/engine/org/apache/derby/impl/io/DirStorageFactory4.java
new file mode 100644 (file)
index 0000000..057ea70
--- /dev/null
+++ b/JMCR-Stable/real-world application/MyDerby-10.3/java/engine/org/apache/derby/impl/io/DirStorageFactory4.java
@@ -0,0 +1,106 @@
+/*\r
+\r
+   Derby - Class org.apache.derby.impl.io.DirStorageFactory4\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.impl.io;\r
+\r
+import org.apache.derby.io.StorageFile;\r
+import org.apache.derby.iapi.services.info.JVMInfo;\r
+\r
+import java.io.IOException;\r
+\r
+/**\r
+ * This class implements the WritableStorageFactory interface using features found in Java 1.4 but\r
+ * not in earlier versions of Java.\r
+ */\r
+public class DirStorageFactory4 extends DirStorageFactory\r
+{\r
+\r
+       private static final boolean    rwsOK = JVMInfo.JDK_ID >= JVMInfo.J2SE_142;\r
+    \r
+    /**\r
+     * Most of the initialization is done in the init method.\r
+     */\r
+    public DirStorageFactory4()\r
+    {\r
+        super();\r
+    }\r
+\r
+    /**\r
+     * Construct a persistent StorageFile from a path name.\r
+     *\r
+     * @param path The path name of the file. Guaranteed not to be in the temporary file directory. If null\r
+     *             then the database directory should be returned.\r
+     *\r
+     * @return A corresponding StorageFile object\r
+     */\r
+    StorageFile newPersistentFile( String path)\r
+    {\r
+        if( path == null)\r
+            return new DirFile4(dataDirectory, rwsOK);\r
+        return new DirFile4(dataDirectory, path, rwsOK);\r
+    }\r
+\r
+    /**\r
+     * Construct a persistent StorageFile from a directory and path name.\r
+     *\r
+     * @param directoryName The path name of the directory. Guaranteed not to be in the temporary file directory.\r
+     *                  Guaranteed not to be null\r
+     * @param fileName The name of the file within the directory. Guaranteed not to be null.\r
+     *\r
+     * @return A corresponding StorageFile object\r
+     */\r
+    StorageFile newPersistentFile( String directoryName, String fileName)\r
+    {\r
+        return new DirFile4( separatedDataDirectory + directoryName, fileName, rwsOK);\r
+    }\r
+\r
+    /**\r
+     * Construct a persistent StorageFile from a directory and path name.\r
+     *\r
+     * @param directoryName The path name of the directory. Guaranteed not to be to be null. Guaranteed to be\r
+     *                  created by a call to one of the newPersistentFile methods.\r
+     * @param fileName The name of the file within the directory. Guaranteed not to be null.\r
+     *\r
+     * @return A corresponding StorageFile object\r
+     */\r
+    StorageFile newPersistentFile( StorageFile directoryName, String fileName)\r
+    {\r
+        return new DirFile4( (DirFile) directoryName, fileName, rwsOK);\r
+    }\r
+\r
+       \r
+    /**\r
+     * This method tests whether the "rws" and "rwd" modes are implemented. If\r
+     * the "rws" and "rwd" modes are supported then the database engine will\r
+     * conclude that the write methods of "rws"/"rwd" mode\r
+     * StorageRandomAccessFiles are slow but the sync method is fast and\r
+     * optimize accordingly.\r
+     *\r
+     * @return <b>true</b> if an StIRandomAccess file opened with "rws" or "rwd" modes immediately writes data to the\r
+     *         underlying storage, <b>false</b> if not.\r
+     */\r
+    public boolean supportsWriteSync()\r
+    {\r
+        return rwsOK;\r
+    }\r
+       \r
+\r
+}\r