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.commons.imaging.common.bytesource; 018 019import java.io.ByteArrayInputStream; 020import java.io.IOException; 021import java.io.InputStream; 022 023public class ByteSourceArray extends ByteSource { 024 private final byte[] bytes; 025 026 public ByteSourceArray(final String fileName, final byte[] bytes) { 027 super(fileName); 028 this.bytes = bytes; 029 } 030 031 public ByteSourceArray(final byte[] bytes) { 032 this(null, bytes); 033 } 034 035 @Override 036 public InputStream getInputStream() { 037 return new ByteArrayInputStream(bytes); 038 } 039 040 @Override 041 public byte[] getBlock(final long startLong, final int length) throws IOException { 042 final int start = (int) startLong; 043 // We include a separate check for int overflow. 044 if ((start < 0) || (length < 0) || (start + length < 0) 045 || (start + length > bytes.length)) { 046 throw new IOException("Could not read block (block start: " + start 047 + ", block length: " + length + ", data length: " 048 + bytes.length + ")."); 049 } 050 051 final byte[] result = new byte[length]; 052 System.arraycopy(bytes, start, result, 0, length); 053 return result; 054 } 055 056 @Override 057 public long getLength() { 058 return bytes.length; 059 } 060 061 @Override 062 public byte[] getAll() throws IOException { 063 return bytes; 064 } 065 066 @Override 067 public String getDescription() { 068 return bytes.length + " byte array"; 069 } 070 071}