/*
* 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.filter.ColumnSlice;
import org.apache.cassandra.db.marshal.AbstractCompositeType;
public abstract class AbstractComposite implements Composite
{
public boolean isEmpty()
{
return size() == 0;
}
public EOC eoc()
{
return EOC.NONE;
}
public Composite start()
{
return withEOC(EOC.START);
}
public Composite end()
{
return withEOC(EOC.END);
}
public Composite withEOC(EOC newEoc)
{
// Note: CompositeBound overwrite this so we assume the EOC of this is NONE
switch (newEoc)
{
case START:
return BoundedComposite.startOf(this);
case END:
return BoundedComposite.endOf(this);
default:
return this;
}
}
public ColumnSlice slice()
{
return new ColumnSlice(start(), end());
}
public ByteBuffer toByteBuffer()
{
// This is the legacy format of composites.
// See org.apache.cassandra.db.marshal.CompositeType for details.
ByteBuffer result = ByteBuffer.allocate(dataSize() + 3 * size());
for (int i = 0; i < size(); i++)
{
ByteBuffer bb = get(i);
AbstractCompositeType.putShortLength(result, bb.remaining());
result.put(bb.duplicate());
result.put((byte)0);
}
result.flip();
return result;
}
public int dataSize()
{
int size = 0;
for (int i = 0; i < size(); i++)
size += get(i).remaining();
return size;
}
public boolean isPrefixOf(Composite c)
{
if (size() > c.size())
return false;
for (int i = 0; i < size(); i++)
{
if (!get(i).equals(c.get(i)))
return false;
}
return true;
}
@Override
public boolean equals(Object o)
{
if (this == o)
return true;
if(!(o instanceof Composite))
return false;
Composite c = (Composite)o;
if (size() != c.size())
return false;
for (int i = 0; i < size(); i++)
{
if (!get(i).equals(c.get(i)))
return false;
}
return eoc() == c.eoc();
}
@Override
public int hashCode()
{
int h = 31;
for (int i = 0; i < size(); i++)
h += get(i).hashCode();
return h + eoc().hashCode();
}
}