svn commit: r1132408 - /cassandra/branches/cassandra-0.8/src/java/org/apache/cassandra/cql/DropIndexStatement.java

[jb...@apache.org]

Author: jbellis
Date: Sun Jun  5 13:46:30 2011
New Revision: 1132408

URL: http://svn.apache.org/viewvc?rev=1132408&view=rev
Log:
add DropIndexStatement.java

Added:
    cassandra/branches/cassandra-0.8/src/java/org/apache/cassandra/cql/DropIndexStatement.java

Added: cassandra/branches/cassandra-0.8/src/java/org/apache/cassandra/cql/DropIndexStatement.java
URL: http://svn.apache.org/viewvc/cassandra/branches/cassandra-0.8/src/java/org/apache/cassandra/cql/DropIndexStatement.java?rev=1132408&view=auto
==============================================================================
--- cassandra/branches/cassandra-0.8/src/java/org/apache/cassandra/cql/DropIndexStatement.java (added)
+++ cassandra/branches/cassandra-0.8/src/java/org/apache/cassandra/cql/DropIndexStatement.java Sun Jun  5 13:46:30 2011
@@ -0,0 +1,86 @@
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+package org.apache.cassandra.cql;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.Map;
+
+import org.apache.cassandra.config.CFMetaData;
+import org.apache.cassandra.config.ConfigurationException;
+import org.apache.cassandra.config.DatabaseDescriptor;
+import org.apache.cassandra.config.KSMetaData;
+import org.apache.cassandra.db.migration.avro.CfDef;
+import org.apache.cassandra.db.migration.avro.ColumnDef;
+import org.apache.cassandra.db.migration.UpdateColumnFamily;
+import org.apache.cassandra.thrift.InvalidRequestException;
+
+public class DropIndexStatement
+{
+    public final String index;
+
+    public DropIndexStatement(String indexName)
+    {
+        index = indexName;
+    }
+
+    public UpdateColumnFamily generateMutation(String keyspace)
+    throws InvalidRequestException, ConfigurationException, IOException
+    {
+        CfDef cfDef = null;
+
+        KSMetaData ksm = DatabaseDescriptor.getTableDefinition(keyspace);
+
+        for (Map.Entry<String, CFMetaData> cf : ksm.cfMetaData().entrySet())
+        {
+            CFMetaData cfm = cf.getValue();
+
+            cfDef = getUpdatedCFDef(CFMetaData.convertToAvro(cfm));
+
+            if (cfDef != null)
+                break;
+        }
+
+        if (cfDef == null)
+            throw new InvalidRequestException("Index '" + index + "' could not be found in any of the ColumnFamilies of keyspace '" + keyspace + "'");
+
+        return new UpdateColumnFamily(cfDef);
+    }
+
+    private CfDef getUpdatedCFDef(CfDef cfDef) throws InvalidRequestException
+    {
+
+        boolean foundColumn = false;
+
+        for (ColumnDef column : cfDef.column_metadata)
+        {
+            if (column.index_type != null && column.index_name != null && column.index_name.equals(index))
+            {
+                foundColumn = true;
+
+                column.index_name = null;
+                column.index_type = null;
+            }
+        }
+
+        return (foundColumn) ? cfDef : null;
+    }
+}