001 /*
002 * Copyright (c) Andrey Kuznetsov. All Rights Reserved.
003 *
004 * http://uio.imagero.com
005 *
006 * Redistribution and use in source and binary forms, with or without
007 * modification, are permitted provided that the following conditions are met:
008 *
009 * o Redistributions of source code must retain the above copyright notice,
010 * this list of conditions and the following disclaimer.
011 *
012 * o Redistributions in binary form must reproduce the above copyright notice,
013 * this list of conditions and the following disclaimer in the documentation
014 * and/or other materials provided with the distribution.
015 *
016 * o Neither the name of Andrey Kuznetsov nor the names of
017 * its contributors may be used to endorse or promote products derived
018 * from this software without specific prior written permission.
019 *
020 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
021 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
022 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
023 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
024 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
025 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
026 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
027 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
028 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
029 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
030 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
031 */
032 package com.imagero.uio.bio.content;
033
034 import java.io.IOException;
035
036 /**
037 * Date: 05.01.2008
038 *
039 * @author Andrey Kuznetsov
040 */
041 public class ByteArrayContent extends Content {
042 byte[][] data;
043
044 public ByteArrayContent(byte[][] data) {
045 this.data = data;
046 }
047
048 public int load(long offset, int bpos, byte[] buffer) throws IOException {
049 IndexAndStart ias = getIAS(offset);
050 if (ias == null) {
051 return 0;
052 }
053 int index = ias.index;
054 long start = ias.start;
055 int pos = (int) (offset - start);
056 byte[] src = data[index];
057 int toCopy = Math.min(src.length - pos, buffer.length - bpos);
058 if (toCopy > 0) {
059 System.arraycopy(src, pos, buffer, bpos, toCopy);
060 if ((toCopy < buffer.length - bpos)) {
061 return toCopy + load(offset + toCopy, bpos + toCopy, buffer);
062 }
063 }
064 return toCopy;
065 }
066
067 public void close() {
068 }
069
070 private IndexAndStart getIAS(long offset) {
071 long start = 0;
072 for (int i = 0; i < data.length; i++) {
073 byte[] src = data[i];
074 int length = src.length;
075 long end = start + length;
076 if (offset >= start && offset <= end) {
077 return new IndexAndStart(i, start);
078 }
079 start += length;
080 }
081 return null;
082 }
083
084 public void save(long offset, int spos, byte[] src, int length) throws IOException {
085 IndexAndStart ias = getIAS(offset);
086 if (ias == null) {
087 return;
088 }
089 int index = ias.index;
090 long start = ias.start;
091 int dpos = (int) (offset - start);
092 byte[] dest = data[index];
093 int request = Math.min(length, src.length - spos);
094 int toCopy = Math.min(dest.length - dpos, request);
095 if (request > 0 && toCopy > 0) {
096 System.arraycopy(src, spos, dest, dpos, toCopy);
097 if (toCopy < request) {
098 save(offset + toCopy, spos + toCopy, src, request - toCopy);
099 }
100 }
101 }
102
103 public boolean canReload() {
104 return true;
105 }
106
107 public long length() throws IOException {
108 long length = 0;
109 for (int i = 0; i < data.length; i++) {
110 byte[] dest = data[i];
111 length += dest.length;
112 }
113 return length;
114 }
115
116 public boolean writable() {
117 return true;
118 }
119 }