package org.apache.cassandra.db; /* * * 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.*; import org.apache.cassandra.io.ICompactSerializer2; import org.apache.cassandra.utils.FBUtilities; public class ColumnSerializer implements ICompactSerializer2<IColumn> { public static void writeName(byte[] name, DataOutput out) { int length = name.length; assert 0 <= length && length <= IColumn.MAX_NAME_LENGTH; try { out.writeByte((length >> 8) & 0xFF); out.writeByte(length & 0xFF); out.write(name); } catch (IOException e) { throw new RuntimeException(e); } } public static byte[] readName(DataInput in) throws IOException { int length = 0; length |= (in.readByte() & 0xFF) << 8; length |= in.readByte() & 0xFF; if (!(0 <= length && length <= IColumn.MAX_NAME_LENGTH)) throw new IOException("Corrupt name length " + length); byte[] bytes = new byte[length]; in.readFully(bytes); return bytes; } public void serialize(IColumn column, DataOutput dos) { ColumnSerializer.writeName(column.name(), dos); try { dos.writeBoolean(column.isMarkedForDelete()); dos.writeLong(column.timestamp()); FBUtilities.writeByteArray(column.value(), dos); } catch (IOException e) { throw new RuntimeException(e); } } public Column deserialize(DataInput dis) throws IOException { byte[] name = ColumnSerializer.readName(dis); boolean delete = dis.readBoolean(); long ts = dis.readLong(); int length = dis.readInt(); if (length < 0) { throw new IOException("Corrupt (negative) value length encountered"); } byte[] value = new byte[length]; if (length > 0) { dis.readFully(value); } return new Column(name, value, ts, delete); } }