package org.apache.cassandra.db.filter;
/*
*
* 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.
*
*/
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import org.apache.cassandra.thrift.ColumnParent;
import org.apache.cassandra.thrift.ColumnPath;
import org.apache.cassandra.utils.ByteBufferUtil;
public class QueryPath
{
public final String columnFamilyName;
public final ByteBuffer superColumnName;
public final ByteBuffer columnName;
public QueryPath(String columnFamilyName, ByteBuffer superColumnName, ByteBuffer columnName)
{
this.columnFamilyName = columnFamilyName;
this.superColumnName = superColumnName;
this.columnName = columnName;
}
public QueryPath(ColumnParent columnParent)
{
this(columnParent.column_family, columnParent.super_column, null);
}
public QueryPath(String columnFamilyName, ByteBuffer superColumnName)
{
this(columnFamilyName, superColumnName, null);
}
public QueryPath(String columnFamilyName)
{
this(columnFamilyName, null);
}
public QueryPath(ColumnPath column_path)
{
this(column_path.column_family, column_path.super_column, column_path.column);
}
public static QueryPath column(ByteBuffer columnName)
{
return new QueryPath(null, null, columnName);
}
@Override
public String toString()
{
return getClass().getSimpleName() + "(" +
"columnFamilyName='" + columnFamilyName + '\'' +
", superColumnName='" + superColumnName + '\'' +
", columnName='" + columnName + '\'' +
')';
}
public void serialize(DataOutputStream dos) throws IOException
{
assert !"".equals(columnFamilyName);
assert superColumnName == null || superColumnName.remaining() > 0;
assert columnName == null || columnName.remaining() > 0;
dos.writeUTF(columnFamilyName == null ? "" : columnFamilyName);
ByteBufferUtil.writeWithShortLength(superColumnName == null ? ByteBufferUtil.EMPTY_BYTE_BUFFER : superColumnName, dos);
ByteBufferUtil.writeWithShortLength(columnName == null ? ByteBufferUtil.EMPTY_BYTE_BUFFER : columnName, dos);
}
public static QueryPath deserialize(DataInputStream din) throws IOException
{
String cfName = din.readUTF();
ByteBuffer scName = ByteBufferUtil.readWithShortLength(din);
ByteBuffer cName = ByteBufferUtil.readWithShortLength(din);
return new QueryPath(cfName.isEmpty() ? null : cfName,
scName.remaining() == 0 ? null : scName,
cName.remaining() == 0 ? null : cName);
}
}