Description

The ExpressionParser class allows you to implement an expression parser.

Properties

_expression

Expression string.

private String _expression = ""

_initialTokens

List of original expression tokens.

public List<ExpressionToken> _initialTokens = new ArrayList<>()

_originalTokens

G)riginal tokens

private List<Token> _originalTokens = new ArrayList<>()

_currentTokenIndex

Current token index.

private int _currentTokenIndex

_resultTokens

List of parsed expression tokens.

private List<ExpressionTokenToken> _resultTokens = new ArrayList<>()

_variableNames

List of found variable names.

private List _variableNames = new ArrayList<>()

Instance methods

getExpression

Gets an new expression string.

public String getExpression()

• returns: String - expression string.

setExpression

Gets an new expression string.

public void setExpression(String value) throws Exception

• value: String - expression string.

getOriginalTokens

Gets original tokens.

public List getOriginalTokens()

• returns: String - expression string.

setOriginalTokens

Sets original tokens.

public void setOriginalTokens(List value) throws SyntaxException

• value: List - list of tokens.

getInitialTokens

Gets initial tokens.

public List getInitialTokens()

• returns: List - list of tokens.

getResultTokens

Gets result tokens.

public List getResultTokens()

• returns: List - list of expression tokens.

getVariableNames

Gets variable names.

public List getVariableNames()

• returns: List - list of variable names.

clear

Clears parsing results.

public void clear()

parseString

Sets a new expression string and parses it into internal byte code.

public void parseString(String expression) throws Exception

• expression: String - new expression string.

parseTokens

Parses a given token.

public void parseTokens(List<Token> tokens) throws SyntaxException

• tokens: Token[] - token to be parsed.