| /** |
| * 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.hadoop.record.meta; |
| |
| import java.io.IOException; |
| import java.util.Iterator; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.record.RecordInput; |
| |
| /** |
| * Various utility functions for Hadooop record I/O platform. |
| * |
| * @deprecated Replaced by <a href="http://hadoop.apache.org/avro/">Avro</a>. |
| */ |
| @Deprecated |
| @InterfaceAudience.Public |
| @InterfaceStability.Stable |
| public class Utils { |
| |
| /** Cannot create a new instance of Utils */ |
| private Utils() { |
| } |
| |
| /** |
| * read/skip bytes from stream based on a type |
| */ |
| public static void skip(RecordInput rin, String tag, TypeID typeID) throws IOException { |
| switch (typeID.typeVal) { |
| case TypeID.RIOType.BOOL: |
| rin.readBool(tag); |
| break; |
| case TypeID.RIOType.BUFFER: |
| rin.readBuffer(tag); |
| break; |
| case TypeID.RIOType.BYTE: |
| rin.readByte(tag); |
| break; |
| case TypeID.RIOType.DOUBLE: |
| rin.readDouble(tag); |
| break; |
| case TypeID.RIOType.FLOAT: |
| rin.readFloat(tag); |
| break; |
| case TypeID.RIOType.INT: |
| rin.readInt(tag); |
| break; |
| case TypeID.RIOType.LONG: |
| rin.readLong(tag); |
| break; |
| case TypeID.RIOType.MAP: |
| org.apache.hadoop.record.Index midx1 = rin.startMap(tag); |
| MapTypeID mtID = (MapTypeID) typeID; |
| for (; !midx1.done(); midx1.incr()) { |
| skip(rin, tag, mtID.getKeyTypeID()); |
| skip(rin, tag, mtID.getValueTypeID()); |
| } |
| rin.endMap(tag); |
| break; |
| case TypeID.RIOType.STRING: |
| rin.readString(tag); |
| break; |
| case TypeID.RIOType.STRUCT: |
| rin.startRecord(tag); |
| // read past each field in the struct |
| StructTypeID stID = (StructTypeID) typeID; |
| Iterator<FieldTypeInfo> it = stID.getFieldTypeInfos().iterator(); |
| while (it.hasNext()) { |
| FieldTypeInfo tInfo = it.next(); |
| skip(rin, tag, tInfo.getTypeID()); |
| } |
| rin.endRecord(tag); |
| break; |
| case TypeID.RIOType.VECTOR: |
| org.apache.hadoop.record.Index vidx1 = rin.startVector(tag); |
| VectorTypeID vtID = (VectorTypeID) typeID; |
| for (; !vidx1.done(); vidx1.incr()) { |
| skip(rin, tag, vtID.getElementTypeID()); |
| } |
| rin.endVector(tag); |
| break; |
| default: |
| // shouldn't be here |
| throw new IOException("Unknown typeID when skipping bytes"); |
| } |
| } |
| } |