001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.wicket.util.io; 018 019import java.io.IOException; 020import java.io.OutputStream; 021 022/** 023 * Output stream that counts bytes written to it (but discards them). 024 * 025 * @author Jonathan Locke 026 */ 027public final class ByteCountingOutputStream extends OutputStream 028{ 029 private long size; 030 031 /** 032 * @see java.io.OutputStream#write(int) 033 */ 034 @Override 035 public void write(final int b) throws IOException 036 { 037 size++; 038 } 039 040 /** 041 * @see java.io.OutputStream#write(byte[], int, int) 042 */ 043 @Override 044 public void write(final byte b[], final int off, final int len) throws IOException 045 { 046 size += len; 047 } 048 049 /** 050 * @return Number of bytes written to this stream 051 */ 052 public long size() 053 { 054 return size; 055 } 056}