/*
* 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 org.apache.cassandra.db.TypeSizes;
import org.apache.cassandra.utils.Allocator;
import org.apache.cassandra.utils.ObjectSizes;
/**
* A "truly-composite" Composite.
*/
public class CompoundComposite extends AbstractComposite
{
// We could use a List, but we'll create such object *a lot* and using a array+size is not
// all that harder, so we save the List object allocation.
final ByteBuffer[] elements;
final int size;
CompoundComposite(ByteBuffer[] elements, int size)
{
this.elements = elements;
this.size = size;
}
public int size()
{
return size;
}
public ByteBuffer get(int i)
{
return elements[i];
}
protected ByteBuffer[] elementsCopy(Allocator allocator)
{
ByteBuffer[] elementsCopy = new ByteBuffer[size];
for (int i = 0; i < size; i++)
elementsCopy[i] = allocator.clone(elements[i]);
return elementsCopy;
}
public long memorySize()
{
return ObjectSizes.getFieldSize(TypeSizes.NATIVE.sizeof(size))
+ ObjectSizes.getArraySize(elements);
}
public Composite copy(Allocator allocator)
{
return new CompoundComposite(elementsCopy(allocator), size);
}
}