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      1 /*
      2  * Copyright (C) 2008 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.emailcommon.utility;
     18 
     19 import java.io.IOException;
     20 import java.io.OutputStream;
     21 
     22 /**
     23  * A simple pass-thru OutputStream that also counts how many bytes are written to it and
     24  * makes that count available to callers.
     25  */
     26 public class CountingOutputStream extends OutputStream {
     27     private long mCount;
     28     private final OutputStream mOutputStream;
     29 
     30     public CountingOutputStream(OutputStream outputStream) {
     31         mOutputStream = outputStream;
     32     }
     33 
     34     public long getCount() {
     35         return mCount;
     36     }
     37 
     38     @Override
     39     public void write(byte[] buffer, int offset, int count) throws IOException {
     40         mOutputStream.write(buffer, offset, count);
     41         mCount += count;
     42     }
     43 
     44     @Override
     45     public void write(int oneByte) throws IOException {
     46         mOutputStream.write(oneByte);
     47         mCount++;
     48     }
     49 }
     50