142 lines
3.7 KiB
Java
142 lines
3.7 KiB
Java
/*
|
|
* 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.CompositeType;
|
|
import org.apache.cassandra.utils.ByteBufferUtil;
|
|
|
|
public abstract class AbstractComposite implements Composite
|
|
{
|
|
public boolean isEmpty()
|
|
{
|
|
return size() == 0;
|
|
}
|
|
|
|
public boolean isStatic()
|
|
{
|
|
return false;
|
|
}
|
|
|
|
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() + (isStatic() ? 2 : 0));
|
|
if (isStatic())
|
|
ByteBufferUtil.writeShortLength(result, CompositeType.STATIC_MARKER);
|
|
|
|
for (int i = 0; i < size(); i++)
|
|
{
|
|
ByteBuffer bb = get(i);
|
|
ByteBufferUtil.writeShortLength(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(CType type, Composite c)
|
|
{
|
|
if (size() > c.size() || isStatic() != c.isStatic())
|
|
return false;
|
|
|
|
for (int i = 0; i < size(); i++)
|
|
{
|
|
if (type.subtype(i).compare(get(i), c.get(i)) != 0)
|
|
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() || isStatic() != c.isStatic())
|
|
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() + (isStatic() ? 1 : 0);
|
|
}
|
|
}
|