Module openj9.dtfj

Package com.ibm.dtfj.javacore.parser.framework.input

Class OffsetBasedJavaCoreInputBuffer

java.lang.Object

com.ibm.dtfj.javacore.parser.framework.input.OffsetBasedJavaCoreInputBuffer

All Implemented Interfaces:

IInputBuffer

Direct Known Subclasses:

LineJavaCoreInputBuffer

public abstract class OffsetBasedJavaCoreInputBuffer
extends Object
implements IInputBuffer

Input buffer that computes character offset from disk.

Field Summary

Fields

Modifier and Type	Field	Description
protected static final int	DEFAULT_LENGTH
protected StringBuffer	fBuffer
protected int	fOffset
protected static final int	START_OFFSET

Constructor Summary

Constructors

Constructor	Description
OffsetBasedJavaCoreInputBuffer()

Method Summary

Modifier and Type	Method	Description
char	charAt(int i)	Retrieves a character at a given position.
abstract void	close()	Closes the java.io.Reader or input stream associated with this buffered reader.
boolean	endReached()
protected boolean	isStreamEnd()
int	length()	NOTE That the length of the buffer may vary during character consumption, so it cannot be assumed to be fixed all the time.
protected void	markStreamEnd(boolean mark)
protected void	updateOffset(int length)

Methods declared in class java.lang.Object

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

Methods declared in interface com.ibm.dtfj.javacore.parser.framework.input.IInputBuffer

consume, nextLine

Field Details

fOffset

protected int fOffset

fBuffer

protected StringBuffer fBuffer

DEFAULT_LENGTH

protected static final int DEFAULT_LENGTH

See Also:

• Constant Field Values

START_OFFSET

protected static final int START_OFFSET

See Also:

• Constant Field Values

Constructor Details

OffsetBasedJavaCoreInputBuffer

public OffsetBasedJavaCoreInputBuffer()

Method Details

markStreamEnd

protected void markStreamEnd(boolean mark)

isStreamEnd

protected boolean isStreamEnd()

endReached

public boolean endReached()

Specified by:

endReached in interface IInputBuffer

Returns:

determines if everything has been consumed from the reader stream.

See Also:

• IInputBuffer.endReached()

length

public int length()

Description copied from interface: IInputBuffer

NOTE That the length of the buffer may vary during character consumption, so it cannot be assumed to be fixed all the time.

Specified by:

length in interface IInputBuffer

Returns:

buffer length

See Also:

• IInputBuffer.length()

charAt

public char charAt(int i)

Description copied from interface: IInputBuffer

Retrieves a character at a given position. No consumption occurs. Typically used by an external scanner to determine if a sequence of characters in the buffer matches a desired pattern. If so, the pattern is consumed by a consume method.

Specified by:

charAt in interface IInputBuffer

Parameters:

buffer - index where character is located

Returns:

character at specified index

See Also:

• IInputBuffer.charAt(int)

updateOffset

protected void updateOffset(int length)

Parameters:

length - to add to current offset

close

public abstract void close()
                    throws IOException

Closes the java.io.Reader or input stream associated with this buffered reader.

Specified by:

close in interface IInputBuffer

Throws:

IOException - if error encountered while closing.