/*
* 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.db;
import java.nio.ByteBuffer;
import org.apache.cassandra.cql3.ColumnIdentifier;
import org.apache.cassandra.config.ColumnDefinition;
import org.apache.cassandra.db.composites.CellName;
import org.apache.cassandra.db.composites.Composite;
import org.apache.cassandra.db.marshal.AbstractType;
import org.apache.cassandra.db.marshal.CollectionType;
import org.apache.cassandra.db.marshal.ListType;
import org.apache.cassandra.db.marshal.MapType;
import org.apache.cassandra.utils.ByteBufferUtil;
import org.apache.cassandra.utils.UUIDGen;
/**
* Convenience object to populate a given CQL3 row in a ColumnFamily object.
*
* This is meant for when performance is not of the utmost importance. When
* performance matters, it might be worth allocating such builder.
*/
public class CFRowAdder
{
public final ColumnFamily cf;
public final Composite prefix;
public final long timestamp;
private final int ldt;
public CFRowAdder(ColumnFamily cf, Composite prefix, long timestamp)
{
this.cf = cf;
this.prefix = prefix;
this.timestamp = timestamp;
this.ldt = (int) (System.currentTimeMillis() / 1000);
// If a CQL3 table, add the row marker
if (cf.metadata().isCQL3Table() && !prefix.isStatic())
cf.addColumn(new BufferCell(cf.getComparator().rowMarker(prefix), ByteBufferUtil.EMPTY_BYTE_BUFFER, timestamp));
}
public CFRowAdder add(String cql3ColumnName, Object value)
{
ColumnDefinition def = getDefinition(cql3ColumnName);
return add(cf.getComparator().create(prefix, def), def, value);
}
public CFRowAdder resetCollection(String cql3ColumnName)
{
ColumnDefinition def = getDefinition(cql3ColumnName);
assert def.type.isCollection();
Composite name = cf.getComparator().create(prefix, def);
cf.addAtom(new RangeTombstone(name.start(), name.end(), timestamp - 1, ldt));
return this;
}
public CFRowAdder addMapEntry(String cql3ColumnName, Object key, Object value)
{
ColumnDefinition def = getDefinition(cql3ColumnName);
assert def.type instanceof MapType;
MapType mt = (MapType)def.type;
CellName name = cf.getComparator().create(prefix, def, mt.keys.decompose(key));
return add(name, def, value);
}
public CFRowAdder addListEntry(String cql3ColumnName, Object value)
{
ColumnDefinition def = getDefinition(cql3ColumnName);
assert def.type instanceof ListType;
CellName name = cf.getComparator().create(prefix, def, ByteBuffer.wrap(UUIDGen.getTimeUUIDBytes()));
return add(name, def, value);
}
private ColumnDefinition getDefinition(String name)
{
return cf.metadata().getColumnDefinition(new ColumnIdentifier(name, false));
}
private CFRowAdder add(CellName name, ColumnDefinition def, Object value)
{
if (value == null)
{
cf.addColumn(new BufferDeletedCell(name, ldt, timestamp));
}
else
{
AbstractType valueType = def.type.isCollection()
? ((CollectionType) def.type).valueComparator()
: def.type;
cf.addColumn(new BufferCell(name, value instanceof ByteBuffer ? (ByteBuffer)value : valueType.decompose(value), timestamp));
}
return this;
}
}