org.apache.hadoop.record.meta.Utils Maven / Gradle / Ivy
/**
* 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 Avro.
*/
@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 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");
}
}
}