/*
* #%L
* Fork of JAI Image I/O Tools.
* %%
* Copyright (C) 2008 - 2014 Open Microscopy Environment:
* - Board of Regents of the University of Wisconsin-Madison
* - Glencoe Software, Inc.
* - University of Dundee
* %%
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are
* those of the authors and should not be interpreted as representing official
* policies, either expressed or implied, of any organization.
* #L%
*/
/*
* $RCSfile: IISRandomAccessIO.java,v $
*
*
* Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any
* kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
* EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
* NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
* USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
* DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
* ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
* CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
* REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
* INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for
* use in the design, construction, operation or maintenance of any
* nuclear facility.
*
* $Revision: 1.1 $
* $Date: 2006/08/08 00:31:47 $
* $State: Exp $
*/
package com.sun.media.imageioimpl.plugins.jpeg2000;
import java.io.IOException;
import java.nio.ByteOrder;
import javax.imageio.stream.ImageInputStream;
import jj2000.j2k.io.EndianType;
import jj2000.j2k.io.RandomAccessIO;
/**
* A wrapper for converting an <code>ImageInputStream</code> into a
* <code>RandomAccessIO</code>. The resulting class is read-only.
*/
public class IISRandomAccessIO implements RandomAccessIO {
/** The <code>ImageInputStream</code> that is wrapped */
private ImageInputStream iis;
/**
* Creates a <code>RandomAccessIO</code> instance from the supplied
* <code>ImageInputStream</code>.
*
* @param iis The source <code>ImageInputStream</code>.
*/
public IISRandomAccessIO(ImageInputStream iis) {
if (iis == null) {
throw new IllegalArgumentException("iis == null!");
}
this.iis = iis;
}
public void close() throws IOException {
iis.close();
}
/**
* Returns the stream position clamped to a maximum of
* <code>Integer.MAX_VALUE</code>.
*/
public int getPos() throws IOException {
long pos = iis.getStreamPosition();
return pos > Integer.MAX_VALUE ? Integer.MAX_VALUE : (int)pos;
}
public void seek(int off) throws IOException {
iis.seek(off);
}
/**
* Returns the length of the data stream.
*
* <p>If the length of the <code>ImageInputStream</code> is not
* <code>-1</code>, then it is returned after being clamped to
* a maximum value of <code>Integer.MAX_VALUE</code>. If the
* <code>ImageInputStream</code> is <code>-1</code>, the stream
* is read to a maximum position of <code>Integer.MAX_VALUE</code>
* and its final position is returned. The position of the stream
* is unchanged from the value it had prior to the call.</p>
*/
public int length() throws IOException {
long len = iis.length();
// If the length is non-negative, use it.
if(len != -1L) {
return len > Integer.MAX_VALUE ? Integer.MAX_VALUE : (int)len;
}
// If the length is negative, read until the stream ends.
iis.mark();
int bufLen = 1024;
byte[] buf = new byte[bufLen];
long pos = iis.getStreamPosition();
while(pos < Integer.MAX_VALUE) {
int numRead = iis.read(buf, 0, bufLen);
if(numRead == -1) break; // EOF
pos += numRead;
}
iis.reset();
// Return the last position.
return pos > Integer.MAX_VALUE ? Integer.MAX_VALUE : (int)pos;
}
public int read() throws IOException {
return iis.read();
}
public void readFully(byte b[], int off, int n) throws IOException {
iis.readFully(b, off, n);
}
public int getByteOrdering() {
return iis.getByteOrder() == ByteOrder.BIG_ENDIAN ?
EndianType.BIG_ENDIAN : EndianType.LITTLE_ENDIAN;
}
public byte readByte() throws IOException {
return iis.readByte();
}
public int readUnsignedByte() throws IOException {
return iis.readUnsignedByte();
}
public short readShort() throws IOException {
return iis.readShort();
}
public int readUnsignedShort() throws IOException {
return iis.readUnsignedShort();
}
public int readInt() throws IOException {
return iis.readInt();
}
public long readUnsignedInt() throws IOException {
return iis.readUnsignedInt();
}
public long readLong() throws IOException {
return iis.readLong();
}
public float readFloat() throws IOException {
return iis.readFloat();
}
public double readDouble() throws IOException {
return iis.readDouble();
}
public int skipBytes(int n) throws IOException {
return iis.skipBytes(n);
}
/**
* A null operation as writing is not supported.
*/
public void flush() {
// Intentionally empty.
}
/**
* Throws an <code>IOException</code> as writing is not supported.
*/
public void write(int b) throws IOException {
throw new IOException("Writing is not supported!");
}
/**
* Throws an <code>IOException</code> as writing is not supported.
*/
public void writeByte(int v) throws IOException {
throw new IOException("Writing is not supported!");
}
/**
* Throws an <code>IOException</code> as writing is not supported.
*/
public void writeShort(int v) throws IOException {
throw new IOException("Writing is not supported!");
}
/**
* Throws an <code>IOException</code> as writing is not supported.
*/
public void writeInt(int v) throws IOException {
throw new IOException("Writing is not supported!");
}
/**
* Throws an <code>IOException</code> as writing is not supported.
*/
public void writeLong(long v) throws IOException {
throw new IOException("Writing is not supported!");
}
/**
* Throws an <code>IOException</code> as writing is not supported.
*/
public void writeFloat(float v) throws IOException {
throw new IOException("Writing is not supported!");
}
/**
* Throws an <code>IOException</code> as writing is not supported.
*/
public void writeDouble(double v) throws IOException {
throw new IOException("Writing is not supported!");
}
}