Package ch.andre601.expressionparser.tokens.readers

Class PatternTokenReader

java.lang.Object

ch.andre601.expressionparser.tokens.readers.TokenReader

ch.andre601.expressionparser.tokens.readers.PatternTokenReader

public class PatternTokenReader
extends TokenReader

TokenReader instance that parses the provided text by looking for appearances of a provided pattern and in such a case returns the provided Token instance.

Constructor Summary

Constructors

Constructor	Description
PatternTokenReader(Token token, String pattern)	Creates a new PatternTokenReader instance with the provided Token instance being used for the provided Pattern String.
PatternTokenReader(Token token, String pattern, boolean ignoreCase)	Creates a new PatternTokenReader instance with the provided Token instance being used for the provided Pattern String.

Method Summary

Modifier and Type	Method	Description
Token	read(String text, ParsePosition position, ParseWarnCollector collector)	Makes a region matches check to see if the String at the current position matches the provided pattern String.

Methods inherited from class ch.andre601.expressionparser.tokens.readers.TokenReader

getPriority

Methods inherited from class java.lang.Object

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

Constructor Details

PatternTokenReader

public PatternTokenReader(Token token,
 String pattern)

Creates a new PatternTokenReader instance with the provided Token instance being used for the provided Pattern String.
Calling this constructor creates a case-insensitive PatternTokenReader. Should you require a case-sensitive one, use PatternTokenReader(Token, String, false) instead.

Parameters:

token - The Token to use for this PatternTokenReader.

pattern - The pattern to use for this PatternTokenReader.

Throws:

IllegalArgumentException - Should token be null, Pattern be null or Pattern be empty.

See Also:

• PatternTokenReader(Token, String, boolean)

PatternTokenReader

public PatternTokenReader(Token token,
 String pattern,
 boolean ignoreCase)

Creates a new PatternTokenReader instance with the provided Token instance being used for the provided Pattern String. The Boolean option allows you to toggle, whether the lookup should ignore casing of the text.

Parameters:

token - The Token to use for this PatternTokenReader.

pattern - The pattern to use for this PatternTokenReader.

ignoreCase - Whether the PatternTokenReader should ignore case when looking for the pattern.

Throws:

IllegalArgumentException - Should token be null, Pattern be null or Pattern be empty.

Method Details

read

public Token read(String text,
 ParsePosition position,
 ParseWarnCollector collector)

Makes a region matches check to see if the String at the current position matches the provided pattern String.
Should it match, returns the Token set in this TokenReader, else null.

Specified by:

read in class TokenReader

Parameters:

text - The text to parse.

position - The current position within the text.

collector - Instance of the ParseWarnCollector used for the parsing.

Returns:

Possibly-null Token.