| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more contributor license |
| * agreements. See the NOTICE file distributed with this work for additional information regarding |
| * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance with the License. You may obtain a |
| * copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software distributed under the License |
| * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express |
| * or implied. See the License for the specific language governing permissions and limitations under |
| * the License. |
| */ |
| package org.apache.geode.internal.cache; |
| |
| import java.io.DataInput; |
| import java.io.DataInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| /** |
| * A data input stream that counts the bytes it plans on reading. |
| * |
| * |
| * @since GemFire prPersistSprint2 |
| */ |
| |
| public class CountingDataInputStream implements DataInput { |
| private final long fileLength; |
| private long count; |
| private final DataInputStream dis; |
| |
| public CountingDataInputStream(InputStream is, long fileLength) { |
| this.fileLength = fileLength; |
| this.dis = new DataInputStream(is); |
| } |
| |
| public long getCount() { |
| return this.count; |
| } |
| |
| public long getFileLength() { |
| return this.fileLength; |
| } |
| |
| public void decrementCount() { |
| this.count--; |
| } |
| |
| public boolean atEndOfFile() { |
| return this.fileLength == this.count; |
| } |
| |
| @Override |
| public void readFully(byte b[]) throws IOException { |
| this.dis.readFully(b); |
| this.count += b.length; |
| } |
| |
| @Override |
| public void readFully(byte b[], int off, int len) throws IOException { |
| this.dis.readFully(b, off, len); |
| this.count += len; |
| } |
| |
| @Override |
| public int skipBytes(int n) throws IOException { |
| int result = this.dis.skipBytes(n); |
| this.count += result; |
| return result; |
| } |
| |
| @Override |
| public boolean readBoolean() throws IOException { |
| boolean result = this.dis.readBoolean(); |
| this.count += 1; |
| return result; |
| } |
| |
| @Override |
| public byte readByte() throws IOException { |
| byte result = this.dis.readByte(); |
| this.count += 1; |
| return result; |
| } |
| |
| @Override |
| public int readUnsignedByte() throws IOException { |
| int result = this.dis.readUnsignedByte(); |
| this.count += 1; |
| return result; |
| } |
| |
| @Override |
| public short readShort() throws IOException { |
| short result = this.dis.readShort(); |
| this.count += 2; |
| return result; |
| } |
| |
| @Override |
| public int readUnsignedShort() throws IOException { |
| int result = this.dis.readUnsignedShort(); |
| this.count += 2; |
| return result; |
| } |
| |
| @Override |
| public char readChar() throws IOException { |
| char result = this.dis.readChar(); |
| this.count += 2; |
| return result; |
| } |
| |
| @Override |
| public int readInt() throws IOException { |
| int result = this.dis.readInt(); |
| this.count += 4; |
| return result; |
| } |
| |
| @Override |
| public long readLong() throws IOException { |
| long result = this.dis.readLong(); |
| this.count += 8; |
| return result; |
| } |
| |
| @Override |
| public float readFloat() throws IOException { |
| float result = this.dis.readFloat(); |
| this.count += 4; |
| return result; |
| } |
| |
| @Override |
| public double readDouble() throws IOException { |
| double result = this.dis.readDouble(); |
| this.count += 8; |
| return result; |
| } |
| |
| @Override |
| public String readLine() throws IOException { |
| throw new IllegalStateException("method not supported"); |
| } |
| |
| @Override |
| public String readUTF() throws IOException { |
| return DataInputStream.readUTF(this); |
| } |
| |
| public void close() throws IOException { |
| this.dis.close(); |
| } |
| } |