001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *     http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    
019    package org.apache.hadoop.record;
020    
021    import java.io.DataInput;
022    import java.io.IOException;
023    import java.io.DataInputStream;
024    import java.io.InputStream;
025    
026    import org.apache.hadoop.classification.InterfaceAudience;
027    import org.apache.hadoop.classification.InterfaceStability;
028    
029    /**
030     * @deprecated Replaced by <a href="https://hadoop.apache.org/avro/">Avro</a>.
031     */
032    @Deprecated
033    @InterfaceAudience.Public
034    @InterfaceStability.Stable
035    public class BinaryRecordInput implements RecordInput {
036        
037      private DataInput in;
038        
039      static private class BinaryIndex implements Index {
040        private int nelems;
041        private BinaryIndex(int nelems) {
042          this.nelems = nelems;
043        }
044        @Override
045        public boolean done() {
046          return (nelems <= 0);
047        }
048        @Override
049        public void incr() {
050          nelems--;
051        }
052      }
053        
054      private BinaryRecordInput() {}
055        
056      private void setDataInput(DataInput inp) {
057        this.in = inp;
058      }
059        
060      private static ThreadLocal bIn = new ThreadLocal() {
061          @Override
062          protected synchronized Object initialValue() {
063            return new BinaryRecordInput();
064          }
065        };
066        
067      /**
068       * Get a thread-local record input for the supplied DataInput.
069       * @param inp data input stream
070       * @return binary record input corresponding to the supplied DataInput.
071       */
072      public static BinaryRecordInput get(DataInput inp) {
073        BinaryRecordInput bin = (BinaryRecordInput) bIn.get();
074        bin.setDataInput(inp);
075        return bin;
076      }
077        
078      /** Creates a new instance of BinaryRecordInput */
079      public BinaryRecordInput(InputStream strm) {
080        this.in = new DataInputStream(strm);
081      }
082        
083      /** Creates a new instance of BinaryRecordInput */
084      public BinaryRecordInput(DataInput din) {
085        this.in = din;
086      }
087        
088      @Override
089      public byte readByte(final String tag) throws IOException {
090        return in.readByte();
091      }
092        
093      @Override
094      public boolean readBool(final String tag) throws IOException {
095        return in.readBoolean();
096      }
097        
098      @Override
099      public int readInt(final String tag) throws IOException {
100        return Utils.readVInt(in);
101      }
102        
103      @Override
104      public long readLong(final String tag) throws IOException {
105        return Utils.readVLong(in);
106      }
107        
108      @Override
109      public float readFloat(final String tag) throws IOException {
110        return in.readFloat();
111      }
112        
113      @Override
114      public double readDouble(final String tag) throws IOException {
115        return in.readDouble();
116      }
117        
118      @Override
119      public String readString(final String tag) throws IOException {
120        return Utils.fromBinaryString(in);
121      }
122        
123      @Override
124      public Buffer readBuffer(final String tag) throws IOException {
125        final int len = Utils.readVInt(in);
126        final byte[] barr = new byte[len];
127        in.readFully(barr);
128        return new Buffer(barr);
129      }
130        
131      @Override
132      public void startRecord(final String tag) throws IOException {
133        // no-op
134      }
135        
136      @Override
137      public void endRecord(final String tag) throws IOException {
138        // no-op
139      }
140        
141      @Override
142      public Index startVector(final String tag) throws IOException {
143        return new BinaryIndex(readInt(tag));
144      }
145        
146      @Override
147      public void endVector(final String tag) throws IOException {
148        // no-op
149      }
150        
151      @Override
152      public Index startMap(final String tag) throws IOException {
153        return new BinaryIndex(readInt(tag));
154      }
155        
156      @Override
157      public void endMap(final String tag) throws IOException {
158        // no-op
159      }
160    }