Module openj9.dtfj

Package com.ibm.j9ddr.corereaders.memory

Class IMemoryImageInputStream

java.lang.Object

javax.imageio.stream.ImageInputStreamImpl

com.ibm.j9ddr.corereaders.memory.IMemoryImageInputStream

All Implemented Interfaces:

Closeable, DataInput, AutoCloseable, ImageInputStream

public class IMemoryImageInputStream
extends ImageInputStreamImpl

InputStream that takes its data from an IMemory instance. Will read until it hits unreadable memory - then it will return EOF.

Field Summary

Fields declared in class javax.imageio.stream.ImageInputStreamImpl

bitOffset, byteOrder, flushedPos, streamPos

Constructor Summary

Constructors

Constructor	Description
IMemoryImageInputStream(IMemory memory, long startingAddress)

Method Summary

Modifier and Type	Method	Description
int	read()	Reads a single byte from the stream and returns it as an int between 0 and 255.
int	read(byte[] buffer, int offset, int length)	Reads up to len bytes from the stream, and stores them into b starting at index off.

Methods declared in class javax.imageio.stream.ImageInputStreamImpl

checkClosed, close, finalize, flush, flushBefore, getBitOffset, getByteOrder, getFlushedPosition, getStreamPosition, isCached, isCachedFile, isCachedMemory, length, mark, read, readBit, readBits, readBoolean, readByte, readBytes, readChar, readDouble, readFloat, readFully, readFully, readFully, readFully, readFully, readFully, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedInt, readUnsignedShort, readUTF, reset, seek, setBitOffset, setByteOrder, skipBytes, skipBytes

Methods declared in class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

IMemoryImageInputStream

public IMemoryImageInputStream(IMemory memory,
 long startingAddress)

Method Details

read

public int read(byte[] buffer,
 int offset,
 int length)
         throws IOException

Description copied from class: javax.imageio.stream.ImageInputStreamImpl

Reads up to len bytes from the stream, and stores them into b starting at index off. If no bytes can be read because the end of the stream has been reached, -1 is returned.

The bit offset within the stream must be reset to zero before the read occurs.

Subclasses must provide an implementation for this method. The subclass implementation should update the stream position before exiting.

Specified by:

read in interface ImageInputStream

Specified by:

read in class ImageInputStreamImpl

Parameters:

buffer - an array of bytes to be written to.

offset - the starting position within b to write to.

length - the maximum number of bytes to read.

Returns:

the number of bytes actually read, or -1 to indicate EOF.

Throws:

IOException - if an I/O error occurs.

read

public int read()
         throws IOException

Description copied from class: javax.imageio.stream.ImageInputStreamImpl

Reads a single byte from the stream and returns it as an int between 0 and 255. If EOF is reached, -1 is returned.

Subclasses must provide an implementation for this method. The subclass implementation should update the stream position before exiting.

The bit offset within the stream must be reset to zero before the read occurs.

Specified by:

read in interface ImageInputStream

Specified by:

read in class ImageInputStreamImpl

Returns:

the value of the next byte in the stream, or -1 if EOF is reached.

Throws:

IOException - if the stream has been closed.