com.scriptbasic.lexer.elements

Class AbstractElementAnalyzer

java.lang.Object

com.scriptbasic.lexer.elements.AbstractElementAnalyzer

All Implemented Interfaces:

LexicalElementAnalyzer

Direct Known Subclasses:

BasicString, Decimal, Identifier, MultiCharacter, OneCharacter

public abstract class AbstractElementAnalyzer
extends Object
implements LexicalElementAnalyzer

Constructor Summary

Constructors

Constructor and Description
AbstractElementAnalyzer()

Method Summary

Methods

Modifier and Type	Method and Description
Reader	getReader()
abstract LexicalElement	read() Reads a lexeme and returns the created lexical element.
void	setReader(Reader reader) Set the reader to read from.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractElementAnalyzer

public AbstractElementAnalyzer()

Method Detail

getReader

public Reader getReader()

setReader

public void setReader(Reader reader)

Description copied from interface: LexicalElementAnalyzer

Set the reader to read from.

Specified by:

setReader in interface LexicalElementAnalyzer

read

public abstract LexicalElement read()
                             throws LexicalException

Description copied from interface: LexicalElementAnalyzer

Reads a lexeme and returns the created lexical element.

If the characters read from the reader show that the lexeme is not the type that the class implementing this interface can handle then the characters are pushed back to he reader and null is returned.

If the characters read from the reader show that the lexeme is the type that the class implementing this interface can handle, but is erroneous, then the method throws the exception.

Specified by:

read in interface LexicalElementAnalyzer

Returns:

the created lexeme or null

Throws:

LexicalException