com.google.gdata.util.parser

Class Sequence<T>

java.lang.Object

com.google.gdata.util.parser.Parser<T>

com.google.gdata.util.parser.Sequence<T>

Type Parameters:

T -

public class Sequence<T>
extends Parser<T>

The Sequence parser matches if its left parser matches the prefix of the parse buffer and then its right parser matches (in sequence) the prefix of whatever remains in the parse buffer. Contrast this with the Alternative and Intersection parsers which apply their sub-parsers to the same portion of the parse buffer. The following matches a string composed of letters followed by digits: Parser p = Parser.sequence(Chset.ALPHA.plus(), Chset.DIGIT.plus()); p.parse("a0") -> matches "a0" p.parse("aaa0") -> matches "aaa0" p.parse("aaa000") -> matches "aaa0000" p.parse("a1a") -> matches "a1" p.parse("a") -> no match, does not end in a digit p.parse("0") -> no match, does not start with a letter

See Also:

Parser

Field Summary

Fields inherited from class com.google.gdata.util.parser.Parser

NO_MATCH

Constructor Summary

Constructors

Constructor and Description
Sequence(Parser<? super T> left, Parser<? super T> right) Class constructor.

Method Summary

Methods

Modifier and Type	Method and Description
int	parse(char[] buf, int start, int end, T data) Matches the prefix of the buffer (buf[start,end)) being parsed against the left and right sub-parsers in sequence.

Methods inherited from class com.google.gdata.util.parser.Parser

action, alternative, difference, intersection, list, optional, parse, parse, parse, plus, repeat, repeat, sequence, sequence, sequence, sequence, star

Methods inherited from class java.lang.Object

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

Constructor Detail

Sequence

public Sequence(Parser<? super T> left,
        Parser<? super T> right)

Class constructor.

Parameters:

left - The Parser that is matched against the parse buffer first.

right - The Parser that is matched against what remains of the parse buffer if the left parser matched.

Method Detail

parse

public int parse(char[] buf,
        int start,
        int end,
        T data)

Matches the prefix of the buffer (buf[start,end)) being parsed against the left and right sub-parsers in sequence.

Specified by:

parse in class Parser<T>

Parameters:

buf - The character array to match against.

start - The start offset of data within the character array to match against.

end - The end offset of data within the character array to match against.

data - User defined object that is passed to Callback.handle when an Action fires.

See Also:

Parser.parse(char[], int, int, T)