/*
*
* 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
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package org.apache.cassandra.cql;
import java.io.IOException;
import org.apache.avro.util.Utf8;
import org.apache.cassandra.config.*;
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 CharSequence index;
public DropIndexStatement(String indexName)
{
index = new Utf8(indexName);
}
public UpdateColumnFamily generateMutation(String keyspace)
throws InvalidRequestException, ConfigurationException, IOException
{
CfDef cfDef = null;
KSMetaData ksm = Schema.instance.getTableDefinition(keyspace);
for (CFMetaData cfm : ksm.cfMetaData().values())
{
cfDef = getUpdatedCFDef(cfm.toAvro());
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
{
for (ColumnDef column : cfDef.column_metadata)
{
if (column.index_type != null && column.index_name != null && column.index_name.equals(index))
{
column.index_name = null;
column.index_type = null;
return cfDef;
}
}
return null;
}
}