net.loomchild.segment.srx.legacy

Class ReaderCharSequence

java.lang.Object

net.loomchild.segment.srx.legacy.ReaderCharSequence

All Implemented Interfaces:

CharSequence

public class ReaderCharSequence
extends Object
implements CharSequence

Adapter of reader class to CharSequence interface. Due to behavior differences CharSequence is not implemented perfectly.

Author:

loomchild

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_BUFFER_LENGTH
static int	DEFAULT_LOOKAHEAD
static int	INFINITE_LENGTH Value to be used as length when it is unknown.

Constructor Summary

Constructors

Constructor and Description
ReaderCharSequence(Reader reader)
ReaderCharSequence(Reader reader, int bufferLength)
ReaderCharSequence(Reader reader, int bufferLength, int length)
ReaderCharSequence(Reader reader, int bufferLength, int length, int lookahead) Create.

Method Summary

Methods

Modifier and Type	Method and Description
char	charAt(int index)
int	length()
CharSequence	subSequence(int start, int end) The length of returned subsequence can be smaller than (end - start) when the end of stream is reached.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.CharSequence

toString

Field Detail

DEFAULT_BUFFER_LENGTH

public static final int DEFAULT_BUFFER_LENGTH

See Also:

Constant Field Values

DEFAULT_LOOKAHEAD

public static final int DEFAULT_LOOKAHEAD

See Also:

Constant Field Values

INFINITE_LENGTH

public static final int INFINITE_LENGTH

Value to be used as length when it is unknown. It must be less than Integer.MAX_VALUE because some code may add something to length.

See Also:

Constant Field Values

Constructor Detail

ReaderCharSequence

public ReaderCharSequence(Reader reader,
                  int bufferLength,
                  int length,
                  int lookahead)

Create.

Parameters:

reader - reader from which char sequence will be read

bufferLength - size of the character buffer

length - length of the input; when it cannot be determined it can be set to INFINITE_LENGTH (max value); cannot be set to Integer.MAX_VALUE because it may cause overflow.

lookahead - number of characters to read after current position

ReaderCharSequence

public ReaderCharSequence(Reader reader,
                  int bufferLength,
                  int length)

ReaderCharSequence

public ReaderCharSequence(Reader reader,
                  int bufferLength)

ReaderCharSequence

public ReaderCharSequence(Reader reader)

Method Detail

length

public int length()

Specified by:

length in interface CharSequence

charAt

public char charAt(int index)

Specified by:

charAt in interface CharSequence

subSequence

public CharSequence subSequence(int start,
                       int end)

The length of returned subsequence can be smaller than (end - start) when the end of stream is reached.

Specified by:

subSequence in interface CharSequence