Package com.github.basking2.sdsai.itrex

Class SimpleExpressionParser

java.lang.Object

com.github.basking2.sdsai.itrex.SimpleExpressionParser

public class SimpleExpressionParser
extends Object

A parser that is JSON-esque, but removes some commas and quotes to better suite the particulars of this language. The JSON [ "map", ["curry", "f"], ["list", 1, 2, 3]] may be parsed to the same expression [map [curry f] [list 1 2 3]] String may still be used, but we allow for unquoted tokens.

Field Summary

Fields

Modifier and Type	Field	Description
static final Pattern	BLOCK_COMMENT
static final Pattern	BOOLEAN
static final Pattern	CLOSE_BRACKET
static final Pattern	COMMA
static final Pattern	DOUBLE
static final Pattern	FIRST_QUOTE
static final Pattern	FLOAT
static final Pattern	INTEGER
static final Pattern	LONG
static final Pattern	OPEN_BRACKET
static final Pattern	QUOTED_STRING
static final Pattern	SKIP_WS
static final Pattern	WORD

Constructor Summary

Constructors

Constructor	Description
SimpleExpressionParser(String expression)	Construct the parser, but do not parse.

Method Summary

Modifier and Type	Method	Description
int	getPosition()	Return the position in the expression string where parsing left off.
final Object	parse()
static Object	parseExpression(String expression)

Methods inherited from class java.lang.Object

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

Field Details

SKIP_WS

public static final Pattern SKIP_WS

COMMA

public static final Pattern COMMA

OPEN_BRACKET

public static final Pattern OPEN_BRACKET

CLOSE_BRACKET

public static final Pattern CLOSE_BRACKET

BLOCK_COMMENT

public static final Pattern BLOCK_COMMENT

FIRST_QUOTE

public static final Pattern FIRST_QUOTE

QUOTED_STRING

public static final Pattern QUOTED_STRING

BOOLEAN

public static final Pattern BOOLEAN

INTEGER

public static final Pattern INTEGER

LONG

public static final Pattern LONG

FLOAT

public static final Pattern FLOAT

DOUBLE

public static final Pattern DOUBLE

WORD

public static final Pattern WORD

Constructor Details

SimpleExpressionParser

public SimpleExpressionParser(String expression)

Construct the parser, but do not parse.

Parameters:

expression - An expression to parse.

See Also:

• parse()

Method Details

parse

public final Object parse()

parseExpression

public static Object parseExpression(String expression)

getPosition

public int getPosition()

Return the position in the expression string where parsing left off.

Returns:

the position in the expression string where parsing left off.