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      1 /*
      2  * Copyright (C) 2012 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.camera.exif;
     18 
     19 import java.io.FilterOutputStream;
     20 import java.io.IOException;
     21 import java.io.OutputStream;
     22 import java.nio.ByteBuffer;
     23 import java.nio.ByteOrder;
     24 
     25 class OrderedDataOutputStream extends FilterOutputStream {
     26     private final ByteBuffer mByteBuffer = ByteBuffer.allocate(4);
     27 
     28     public OrderedDataOutputStream(OutputStream out) {
     29         super(out);
     30     }
     31 
     32     public OrderedDataOutputStream setByteOrder(ByteOrder order) {
     33         mByteBuffer.order(order);
     34         return this;
     35     }
     36 
     37     public OrderedDataOutputStream writeShort(short value) throws IOException {
     38         mByteBuffer.rewind();
     39         mByteBuffer.putShort(value);
     40         out.write(mByteBuffer.array(), 0, 2);
     41         return this;
     42     }
     43 
     44     public OrderedDataOutputStream writeInt(int value) throws IOException {
     45         mByteBuffer.rewind();
     46         mByteBuffer.putInt(value);
     47         out.write(mByteBuffer.array());
     48         return this;
     49     }
     50 
     51     public OrderedDataOutputStream writeRational(Rational rational) throws IOException {
     52         writeInt((int) rational.getNumerator());
     53         writeInt((int) rational.getDenominator());
     54         return this;
     55     }
     56 }
     57