com.itextpdf.text.io.ArrayRandomAccessSource Maven / Gradle / Ivy
/*
* $Id: e373864ba9541d88ba2c3201634c3575b8a019e1 $
*
* This file is part of the iText (R) project.
* Copyright (c) 1998-2016 iText Group NV
* Authors: Kevin Day, Bruno Lowagie, et al.
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* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
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* following permission added to Section 15 as permitted in Section 7(a):
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package com.itextpdf.text.io;
import java.io.IOException;
/**
* A RandomAccessSource that is based on an underlying byte array
* @since 5.3.5
*/
class ArrayRandomAccessSource implements RandomAccessSource {
private byte[] array;
public ArrayRandomAccessSource(byte[] array) {
if(array == null) throw new NullPointerException();
this.array = array;
}
public int get(long offset) {
if (offset >= array.length) return -1;
return 0xff & array[(int)offset];
}
public int get(long offset, byte[] bytes, int off, int len) {
if (array == null) throw new IllegalStateException("Already closed");
if (offset >= array.length)
return -1;
if (offset + len > array.length)
len = (int)(array.length - offset);
System.arraycopy(array, (int)offset, bytes, off, len);
return len;
}
public long length() {
return array.length;
}
public void close() throws IOException {
array = null;
}
}