Package it.unimi.dsi.io

Class DelimitedWordReader

java.lang.Object

java.io.Reader

it.unimi.dsi.io.FastBufferedReader

it.unimi.dsi.io.DelimitedWordReader

All Implemented Interfaces:

WordReader, Closeable, Serializable, AutoCloseable, Readable

public class DelimitedWordReader
extends FastBufferedReader

A word reader that breaks words on a given set of characters.

This class is a simple subclass of FastBufferedReader. It overwrites isWordConstituent(char) so that word constituents are defined negatively by a set of delimiters defined at construction time. There is a constructor accepting the delimiter set as a string. Note that LF and CR are always considered to be delimiters.

See Also:

• Serialized Form

Field Summary

Fields inherited from class it.unimi.dsi.io.FastBufferedReader

avail, buffer, bufferSize, DEFAULT_BUFFER_SIZE, pos, reader, wordConstituents

Fields inherited from class java.io.Reader

lock

Constructor Summary

Constructors

Constructor	Description
DelimitedWordReader(char[] array, int offset, int length, CharSet delimiters)	Creates a new delimited word reader by wrapping a given fragment of a character array and using a set delimiters.
DelimitedWordReader(char[] array, CharSet delimiters)	Creates a new delimited word reader by wrapping a given character array and using a set delimiters.
DelimitedWordReader(int bufferSize, CharSet delimiters)	Creates a new delimited word reader with a given buffer size and set of delimiters.
DelimitedWordReader(CharSet delimiters)	Creates a new delimited word reader with a buffer of FastBufferedReader.DEFAULT_BUFFER_SIZE characters.
DelimitedWordReader(MutableString s, CharSet delimiters)	Creates a new delimited word reader by wrapping a given mutable string and using a set of delimiters.
DelimitedWordReader(Reader r, int bufferSize, CharSet delimiters)	Creates a new delimited word reader by wrapping a given reader with a given buffer size and using a set of delimiters.
DelimitedWordReader(Reader r, CharSet delimiters)	Creates a new delimited word reader by wrapping a given reader with a buffer of FastBufferedReader.DEFAULT_BUFFER_SIZE characters using a given set of delimiters.
DelimitedWordReader(String delimiters)	Creates a new delimited word reader with a buffer of FastBufferedReader.DEFAULT_BUFFER_SIZE characters.
DelimitedWordReader(String bufferSize, String delimiters)	Creates a new delimited word reader with a given buffer size and set of delimiters.

Method Summary

Modifier and Type	Method	Description
DelimitedWordReader	copy()	Returns a copy of this word reader.
protected boolean	isWordConstituent(char c)	Returns whether the given character is a word constituent.
String	toSpec()
String	toString()

Methods inherited from class it.unimi.dsi.io.FastBufferedReader

close, next, noMoreCharacters, read, read, readLine, setReader, skip

Methods inherited from class java.io.Reader

mark, markSupported, nullReader, read, read, ready, reset, transferTo

Methods inherited from class java.lang.Object

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

Constructor Details

DelimitedWordReader

public DelimitedWordReader(int bufferSize,
 CharSet delimiters)

Creates a new delimited word reader with a given buffer size and set of delimiters. The wrapped reader will have to be set later using FastBufferedReader.setReader(Reader).

Parameters:

bufferSize - the size in bytes of the internal buffer.

delimiters - a set of characters that will be considered word delimiters.

DelimitedWordReader

public DelimitedWordReader(CharSet delimiters)

Creates a new delimited word reader with a buffer of FastBufferedReader.DEFAULT_BUFFER_SIZE characters. The wrapped reader will have to be set later using FastBufferedReader.setReader(Reader).

Parameters:

delimiters - a set of characters that will be considered word delimiters.

DelimitedWordReader

public DelimitedWordReader(String delimiters)

Creates a new delimited word reader with a buffer of FastBufferedReader.DEFAULT_BUFFER_SIZE characters. The wrapped reader will have to be set later using FastBufferedReader.setReader(Reader).

Warning: it is easy to mistake this method for one whose semantics is the same as FastBufferedReader(MutableString), that is, wrapping the argument string in a reader.

Parameters:

delimiters - a set of characters that will be considered word delimiters, specified as a string.

DelimitedWordReader

public DelimitedWordReader(String bufferSize,
 String delimiters)

Creates a new delimited word reader with a given buffer size and set of delimiters. The wrapped reader will have to be set later using FastBufferedReader.setReader(Reader).

Parameters:

bufferSize - the size in bytes of the internal buffer, specified as a string.

delimiters - a set of characters that will be considered word delimiters, specified as a string.

DelimitedWordReader

public DelimitedWordReader(Reader r,
 int bufferSize,
 CharSet delimiters)

Creates a new delimited word reader by wrapping a given reader with a given buffer size and using a set of delimiters.

Parameters:

r - a reader to wrap.

bufferSize - the size in bytes of the internal buffer.

delimiters - a set of characters that will be considered word delimiters.

DelimitedWordReader

public DelimitedWordReader(Reader r,
 CharSet delimiters)

Creates a new delimited word reader by wrapping a given reader with a buffer of FastBufferedReader.DEFAULT_BUFFER_SIZE characters using a given set of delimiters.

Parameters:

r - a reader to wrap.

delimiters - a set of characters that will be considered word delimiters.

DelimitedWordReader

public DelimitedWordReader(char[] array,
 int offset,
 int length,
 CharSet delimiters)

Creates a new delimited word reader by wrapping a given fragment of a character array and using a set delimiters.

The effect of FastBufferedReader.setReader(Reader) on a buffer created with this constructor is undefined.

Parameters:

array - the array that will be wrapped by the reader.

offset - the first character to be used.

length - the number of character to be used.

delimiters - a set of characters that will be considered word delimiters.

DelimitedWordReader

public DelimitedWordReader(char[] array,
 CharSet delimiters)

Creates a new delimited word reader by wrapping a given character array and using a set delimiters.

The effect of FastBufferedReader.setReader(Reader) on a buffer created with this constructor is undefined.

Parameters:

array - the array that will be wrapped by the reader.

delimiters - a set of characters that will be considered word delimiters.

DelimitedWordReader

public DelimitedWordReader(MutableString s,
 CharSet delimiters)

Creates a new delimited word reader by wrapping a given mutable string and using a set of delimiters.

The effect of FastBufferedReader.setReader(Reader) on a buffer created with this constructor is undefined.

Parameters:

s - the mutable string that will be wrapped by the reader.

delimiters - a set of characters that will be considered word delimiters.

Method Details

isWordConstituent

protected boolean isWordConstituent(char c)

Description copied from class: FastBufferedReader

Returns whether the given character is a word constituent.

The behaviour of this FastBufferedReader as a WordReader can be radically changed by overwriting this method.

Overrides:

isWordConstituent in class FastBufferedReader

Parameters:

c - a character.

Returns:

whether c should be considered a word constituent.

copy

public DelimitedWordReader copy()

Description copied from interface: WordReader

Returns a copy of this word reader.

This method must return a word reader with a behaviour that matches exactly that of this word reader.

Specified by:

copy in interface WordReader

Overrides:

copy in class FastBufferedReader

Returns:

a copy of this word reader.

toSpec

public String toSpec()

Overrides:

toSpec in class FastBufferedReader

toString

public String toString()

Overrides:

toString in class FastBufferedReader