/*
* Copyright (c) 2016 Vivid Solutions.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Eclipse Distribution License v. 1.0 which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
*
* http://www.eclipse.org/org/documents/edl-v10.php.
*/
package org.locationtech.jts.io;
import java.io.IOException;
/**
* Allows reading a stream of Java primitive datatypes from an underlying
* {@link InStream},
* with the representation being in either common byte ordering.
*/
public class ByteOrderDataInStream
{
private int byteOrder = ByteOrderValues.BIG_ENDIAN;
private InStream stream;
// buffers to hold primitive datatypes
private byte[] buf1 = new byte[1];
private byte[] buf4 = new byte[4];
private byte[] buf8 = new byte[8];
public ByteOrderDataInStream()
{
this.stream = null;
}
public ByteOrderDataInStream(InStream stream)
{
this.stream = stream;
}
/**
* Allows a single ByteOrderDataInStream to be reused
* on multiple InStreams.
*
* @param stream
*/
public void setInStream(InStream stream)
{
this.stream = stream;
}
public void setOrder(int byteOrder)
{
this.byteOrder = byteOrder;
}
/**
* Reads a byte value
*
* @return the byte read
*/
public byte readByte()
throws IOException
{
stream.read(buf1);
return buf1[0];
}
public int readInt()
throws IOException
{
stream.read(buf4);
return ByteOrderValues.getInt(buf4, byteOrder);
}
public long readLong()
throws IOException
{
stream.read(buf8);
return ByteOrderValues.getLong(buf8, byteOrder);
}
public double readDouble()
throws IOException
{
stream.read(buf8);
return ByteOrderValues.getDouble(buf8, byteOrder);
}
}