org.xlattice.corexml.expr
Class Symbol

java.lang.Object
  org.xlattice.corexml.expr.Symbol

All Implemented Interfaces:

Token

public class Symbol
extends java.lang.Object
implements Token

These are a subset of what rule [28] calls ExprToken but with the addition of left and right curly brackets (braces), the colon, the dollar sign, and possibly other symbols.

Author:

Jim Dixon

Field Summary

static java.lang.String	ALL_ONE_CHAR_SYMBOLS all 1-char symbols, including those which start other symbols
static int	AT
static int	COLON
static int	COMMA
static int	DCOLON
static int	DDOT
static int	DOLLAR
static int	DOT
static int	LBRACE
static int	LBRACKET
static int	LPAREN
static int	RBRACE
static int	RBRACKET
static int	RPAREN
static java.lang.String	SINGLE_CHAR_SYMBOLS those symbols which only appear in one form
static int	STAR
static java.lang.String[]	SYMBOLS list of the symbols in string form in the same order

Constructor Summary

Symbol(char c)
Create a Symbol from its one-character form.

Symbol(java.lang.String sym)
Create a Symbol given its String form.

Method Summary

boolean	equals(java.lang.Object o)
int	getIndex()
int	hashCode()
static boolean	isSingleCharSymbol(char c)
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

LPAREN

public static final int LPAREN

See Also:

Constant Field Values

RPAREN

public static final int RPAREN

See Also:

Constant Field Values

LBRACKET

public static final int LBRACKET

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Constant Field Values

RBRACKET

public static final int RBRACKET

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Constant Field Values

LBRACE

public static final int LBRACE

See Also:

Constant Field Values

RBRACE

public static final int RBRACE

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Constant Field Values

AT

public static final int AT

See Also:

Constant Field Values

COMMA

public static final int COMMA

See Also:

Constant Field Values

DOLLAR

public static final int DOLLAR

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Constant Field Values

STAR

public static final int STAR

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Constant Field Values

DOT

public static final int DOT

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Constant Field Values

COLON

public static final int COLON

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Constant Field Values

DDOT

public static final int DDOT

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Constant Field Values

DCOLON

public static final int DCOLON

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Constant Field Values

SYMBOLS

public static final java.lang.String[] SYMBOLS

list of the symbols in string form in the same order

SINGLE_CHAR_SYMBOLS

public static final java.lang.String SINGLE_CHAR_SYMBOLS

those symbols which only appear in one form

See Also:

Constant Field Values

ALL_ONE_CHAR_SYMBOLS

public static final java.lang.String ALL_ONE_CHAR_SYMBOLS

all 1-char symbols, including those which start other symbols

See Also:

Constant Field Values

Constructor Detail

Symbol

public Symbol(char c)

Create a Symbol from its one-character form.

Throws:

java.lang.IllegalStateException - if it isn't a valid symbol.

Symbol

public Symbol(java.lang.String sym)

Create a Symbol given its String form.

Method Detail

isSingleCharSymbol

public static boolean isSingleCharSymbol(char c)

Returns:

true if the character is a symbol and does not start a multi-character symbol

getIndex

public int getIndex()

Returns:

the index of this symbol

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object