/*
* 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.composites;
import java.nio.ByteBuffer;
import java.util.HashMap;
import java.util.Map;
import org.apache.cassandra.config.CFMetaData;
import org.apache.cassandra.config.ColumnDefinition;
import org.apache.cassandra.cql3.CQL3Row;
import org.apache.cassandra.cql3.ColumnIdentifier;
import org.apache.cassandra.db.marshal.AbstractType;
public class SimpleSparseCellNameType extends AbstractSimpleCellNameType
{
// Simple sparse means static thrift CF or non-clustered CQL3. This means that cell names will mainly
// be those that have been declared and we can intern the whole CellName instances.
private final Map<ByteBuffer, CellName> internedNames;
public SimpleSparseCellNameType(AbstractType<?> type)
{
this(type, new HashMap<ByteBuffer, CellName>());
}
private SimpleSparseCellNameType(AbstractType<?> type, Map<ByteBuffer, CellName> internedNames)
{
super(type);
this.internedNames = internedNames;
}
public int clusteringPrefixSize()
{
return 0;
}
public CellNameType setSubtype(int position, AbstractType<?> newType)
{
if (position != 0)
throw new IllegalArgumentException();
return new SimpleSparseCellNameType(newType, internedNames);
}
public CBuilder prefixBuilder()
{
return Composites.EMPTY_BUILDER;
}
public boolean isDense()
{
return false;
}
public CellName create(Composite prefix, ColumnDefinition column)
{
assert prefix.isEmpty();
CellName cn = internedNames.get(column.name.bytes);
return cn == null ? new SimpleSparseCellName(column.name) : cn;
}
@Override
public Composite fromByteBuffer(ByteBuffer bb)
{
if (!bb.hasRemaining())
return Composites.EMPTY;
CellName cn = internedNames.get(bb);
return cn == null ? new SimpleSparseCellName(new ColumnIdentifier(bb, type)) : cn;
}
public void addCQL3Column(ColumnIdentifier id)
{
internedNames.put(id.bytes, new SimpleSparseInternedCellName(id));
}
public void removeCQL3Column(ColumnIdentifier id)
{
internedNames.remove(id.bytes);
}
public CQL3Row.Builder CQL3RowBuilder(CFMetaData metadata, long now)
{
return makeSparseCQL3RowBuilder(metadata, this, now);
}
}