Adding JMCR-Stable version

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

diff --git a/JMCR-Stable/real-world application/MyDerby-10.3/java/engine/org/apache/derby/impl/sql/compile/CollectNodesVisitor.java b/JMCR-Stable/real-world application/MyDerby-10.3/java/engine/org/apache/derby/impl/sql/compile/CollectNodesVisitor.java
new file mode 100644 (file)
index 0000000..17887fb
--- /dev/null
+++ b/JMCR-Stable/real-world application/MyDerby-10.3/java/engine/org/apache/derby/impl/sql/compile/CollectNodesVisitor.java
@@ -0,0 +1,124 @@
+/*\r
+\r
+   Derby - Class org.apache.derby.impl.sql.compile.CollectNodesVisitor\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.sql.compile;\r
+\r
+import org.apache.derby.iapi.services.sanity.SanityManager;\r
+import org.apache.derby.iapi.sql.compile.Visitable; \r
+import org.apache.derby.iapi.sql.compile.Visitor;\r
+\r
+import org.apache.derby.iapi.error.StandardException;\r
+\r
+import java.util.Vector;\r
+\r
+/**\r
+ * Collect all nodes of the designated type to be returned\r
+ * in a vector.\r
+ * <p>\r
+ * Can find any type of node -- the class or class name\r
+ * of the target node is passed in as a constructor\r
+ * parameter.\r
+ *\r
+ */\r
+public class CollectNodesVisitor implements Visitor\r
+{\r
+       private Vector  nodeList;\r
+       private Class   nodeClass;\r
+       private Class   skipOverClass;\r
+       /**\r
+        * Construct a visitor\r
+        *\r
+        * @param nodeClass the class of the node that \r
+        *      we are looking for.\r
+        */\r
+       public CollectNodesVisitor(Class nodeClass)\r
+       {\r
+               this.nodeClass = nodeClass;\r
+               nodeList = new Vector();\r
+       }\r
+\r
+       /**\r
+        * Construct a visitor\r
+        *\r
+        * @param nodeClass the class of the node that \r
+        *      we are looking for.\r
+        * @param skipOverClass do not go below this\r
+        * node when searching for nodeClass.\r
+        */\r
+       public CollectNodesVisitor(Class nodeClass, Class skipOverClass)\r
+       {\r
+               this(nodeClass);\r
+               this.skipOverClass = skipOverClass;\r
+       }\r
+\r
+       public boolean stopTraversal()\r
+       {\r
+               return false;\r
+       }\r
+       ////////////////////////////////////////////////\r
+       //\r
+       // VISITOR INTERFACE\r
+       //\r
+       ////////////////////////////////////////////////\r
+\r
+       /**\r
+        * If we have found the target node, we are done.\r
+        *\r
+        * @param node  the node to process\r
+        *\r
+        * @return me\r
+        */\r
+       public Visitable visit(Visitable node)\r
+       {\r
+               if (nodeClass.isInstance(node))\r
+               {\r
+                       nodeList.addElement(node);      \r
+               }\r
+               return node;\r
+       }\r
+\r
+       /**\r
+        * Don't visit childen under the skipOverClass\r
+        * node, if it isn't null.\r
+        *\r
+        * @return true/false\r
+        */\r
+       public boolean skipChildren(Visitable node)\r
+       {\r
+               return (skipOverClass == null) ?\r
+                               false:\r
+                               skipOverClass.isInstance(node);\r
+       }\r
+\r
+       ////////////////////////////////////////////////\r
+       //\r
+       // CLASS INTERFACE\r
+       //\r
+       ////////////////////////////////////////////////\r
+       /**\r
+        * Reset the status so it can be run again.\r
+        *\r
+        */\r
+       public Vector getList()\r
+       {\r
+               return nodeList;\r
+       }\r
+}      \r