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      1 // Protocol Buffers - Google's data interchange format
      2 // Copyright 2013 Google Inc.  All rights reserved.
      3 // https://developers.google.com/protocol-buffers/
      4 //
      5 // Redistribution and use in source and binary forms, with or without
      6 // modification, are permitted provided that the following conditions are
      7 // met:
      8 //
      9 //     * Redistributions of source code must retain the above copyright
     10 // notice, this list of conditions and the following disclaimer.
     11 //     * Redistributions in binary form must reproduce the above
     12 // copyright notice, this list of conditions and the following disclaimer
     13 // in the documentation and/or other materials provided with the
     14 // distribution.
     15 //     * Neither the name of Google Inc. nor the names of its
     16 // contributors may be used to endorse or promote products derived from
     17 // this software without specific prior written permission.
     18 //
     19 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     20 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     21 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     22 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     23 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     24 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     25 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     29 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30 
     31 package com.google.protobuf.nano;
     32 
     33 import java.io.IOException;
     34 import java.util.Arrays;
     35 
     36 /**
     37  * Stores unknown fields. These might be extensions or fields that the generated
     38  * API doesn't know about yet.
     39  *
     40  * @author bduff (at) google.com (Brian Duff)
     41  */
     42 final class UnknownFieldData {
     43 
     44     final int tag;
     45     /**
     46      * Important: this should be treated as immutable, even though it's possible
     47      * to change the array values.
     48      */
     49     final byte[] bytes;
     50 
     51     UnknownFieldData(int tag, byte[] bytes) {
     52         this.tag = tag;
     53         this.bytes = bytes;
     54     }
     55 
     56     int computeSerializedSize() {
     57         int size = 0;
     58         size += CodedOutputByteBufferNano.computeRawVarint32Size(tag);
     59         size += bytes.length;
     60         return size;
     61     }
     62 
     63     void writeTo(CodedOutputByteBufferNano output) throws IOException {
     64         output.writeRawVarint32(tag);
     65         output.writeRawBytes(bytes);
     66     }
     67 
     68     @Override
     69     public boolean equals(Object o) {
     70         if (o == this) {
     71             return true;
     72         }
     73         if (!(o instanceof UnknownFieldData)) {
     74             return false;
     75         }
     76 
     77         UnknownFieldData other = (UnknownFieldData) o;
     78         return tag == other.tag && Arrays.equals(bytes, other.bytes);
     79     }
     80 
     81     @Override
     82     public int hashCode() {
     83         int result = 17;
     84         result = 31 * result + tag;
     85         result = 31 * result + Arrays.hashCode(bytes);
     86         return result;
     87     }
     88 }
     89