Adding JMCR-Stable version

[Benchmarks_CSolver.git] / JMCR-Stable / real-world application / derby-10.3.2.1 / java / engine / org / apache / derby / impl / store / access / conglomerate / RowPosition.java

diff --git a/JMCR-Stable/real-world application/derby-10.3.2.1/java/engine/org/apache/derby/impl/store/access/conglomerate/RowPosition.java b/JMCR-Stable/real-world application/derby-10.3.2.1/java/engine/org/apache/derby/impl/store/access/conglomerate/RowPosition.java
new file mode 100644 (file)
index 0000000..60ded0d
--- /dev/null
+++ b/JMCR-Stable/real-world application/derby-10.3.2.1/java/engine/org/apache/derby/impl/store/access/conglomerate/RowPosition.java
@@ -0,0 +1,122 @@
+/*\r
+\r
+   Derby - Class org.apache.derby.impl.store.access.conglomerate.RowPosition\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.store.access.conglomerate;\r
+\r
+import org.apache.derby.iapi.services.sanity.SanityManager;\r
+\r
+import org.apache.derby.iapi.store.raw.ContainerHandle;\r
+import org.apache.derby.iapi.store.raw.Page;\r
+import org.apache.derby.iapi.store.raw.RecordHandle;\r
+\r
+/**\r
+\r
+Just an easy way to pass information back and forth about current position of\r
+a row in a table.\r
+\r
+**/\r
+\r
+public class RowPosition\r
+{\r
+    /**************************************************************************\r
+     * Fields of the class\r
+     **************************************************************************\r
+     */\r
+    public Page            current_page; \r
+    public RecordHandle    current_rh;\r
+    public int             current_slot;\r
+    public boolean         current_rh_qualified;\r
+    public long            current_pageno;\r
+\r
+    /**************************************************************************\r
+     * Constructors for This class:\r
+     **************************************************************************\r
+     */\r
+    public RowPosition()\r
+    {\r
+    }\r
+\r
+    /**************************************************************************\r
+     * Private/Protected methods of This class:\r
+     **************************************************************************\r
+     */\r
+\r
+    /**************************************************************************\r
+     * Public Methods of This class:\r
+     **************************************************************************\r
+     */\r
+\r
+    public void init()\r
+    {\r
+        current_page            = null;\r
+        current_rh              = null;\r
+        current_slot            = Page.INVALID_SLOT_NUMBER;\r
+        current_rh_qualified    = false;\r
+        current_pageno          = ContainerHandle.INVALID_PAGE_NUMBER;\r
+    }\r
+\r
+    public final void positionAtNextSlot()\r
+    {\r
+        current_slot++;\r
+        current_rh   = null;\r
+    }\r
+\r
+    public final void positionAtPrevSlot()\r
+    {\r
+        current_slot--;\r
+        current_rh   = null;\r
+    }\r
+\r
+    public void unlatch()\r
+    {\r
+        if (current_page != null)\r
+        {\r
+            current_page.unlatch();\r
+            current_page = null;\r
+        }\r
+        current_slot = Page.INVALID_SLOT_NUMBER;\r
+    }\r
+\r
+    public String toString()\r
+    {\r
+        String ret_string = null;\r
+\r
+        if (SanityManager.DEBUG)\r
+        {\r
+            ret_string = \r
+                ";current_slot=" + current_slot +\r
+                ";current_rh=" + current_rh +\r
+                ";current_pageno=" + current_pageno +\r
+                ";current_page=" + \r
+                    (current_page == null ? \r
+                         "null" : String.valueOf(current_page.getPageNumber()));\r
+\r
+                // ";current_page=" + current_page;\r
+        }\r
+\r
+        return(ret_string);\r
+    }\r
+\r
+    /**************************************************************************\r
+     * Public Methods of XXXX class:\r
+     **************************************************************************\r
+     */\r
+}\r