Package oracle.rules.sdk2.ruleset

Class ExprParser

java.lang.Object

oracle.rules.sdk2.ruleset.ExprParser

public class ExprParser
extends Object

Scans an input expression string, and if successful, parses the string. Creates an ordered array of Tokens. Determines which token the cursor is in. Analyzes the expression to determine if it will yield the correct type.

TODO: reorg so there is one constructor and various getters that scan/parse/analyze on demand as needed, so user is shielded from knowing how much analysis is needed for a particular getter (like getResultType v. getValue)

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	ExprParser.Token	Token represents a lexeme in a parsed expression.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	TOKEN_BINARYOP
static final int	TOKEN_BOOLEAN_CONSTANT
static final int	TOKEN_CHARLIT
static final int	TOKEN_CONSTRUCTOR
static final int	TOKEN_FUNCTION
static final int	TOKEN_IDENTIFIER
static final int	TOKEN_LBRACKET
static final int	TOKEN_LPAREN
static final int	TOKEN_NULL
static final int	TOKEN_NUMBER
static final int	TOKEN_PRE_UNARYOP
static final int	TOKEN_RBRACKET
static final int	TOKEN_RPAREN
static final int	TOKEN_STRINGLIT
static final int	TOKEN_TYPE_OP
static final int	TOKEN_TYPE_OPERAND
static final int	TOKEN_TYPE_UNKNOWN
static final int	TOKEN_UNARY_OR_BINARY_OP
static final int	TOKEN_UNKNOWN

Method Summary

Modifier and Type	Method	Description
List<ExprParser.Token>	getConcatTokens()
static ExprParser	getParser(String value)	Deprecated. used for testing only
List<DOID>	getReferences()
DOID	getResultID()
List<ExprParser.Token>	getTokens()
boolean	hasError()
static boolean	higherPrecedence(String op1, String op2)	Determine whether op1 has higher precedence than op2.
void	invalidate()	Force invalidation of this expression parser
static boolean	isCalendar(DOID typeID)
static ExprParser	usageOnly(ExprParser parser, RuleComponent parent)

Methods inherited from class java.lang.Object

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

Field Details

TOKEN_TYPE_OPERAND

public static final int TOKEN_TYPE_OPERAND

See Also:

• Constant Field Values

TOKEN_IDENTIFIER

public static final int TOKEN_IDENTIFIER

See Also:

• Constant Field Values

TOKEN_FUNCTION

public static final int TOKEN_FUNCTION

See Also:

• Constant Field Values

TOKEN_CONSTRUCTOR

public static final int TOKEN_CONSTRUCTOR

See Also:

• Constant Field Values

TOKEN_NUMBER

public static final int TOKEN_NUMBER

See Also:

• Constant Field Values

TOKEN_STRINGLIT

public static final int TOKEN_STRINGLIT

See Also:

• Constant Field Values

TOKEN_CHARLIT

public static final int TOKEN_CHARLIT

See Also:

• Constant Field Values

TOKEN_BOOLEAN_CONSTANT

public static final int TOKEN_BOOLEAN_CONSTANT

See Also:

• Constant Field Values

TOKEN_NULL

public static final int TOKEN_NULL

See Also:

• Constant Field Values

TOKEN_TYPE_OP

public static final int TOKEN_TYPE_OP

See Also:

• Constant Field Values

TOKEN_LPAREN

public static final int TOKEN_LPAREN

See Also:

• Constant Field Values

TOKEN_RPAREN

public static final int TOKEN_RPAREN

See Also:

• Constant Field Values

TOKEN_BINARYOP

public static final int TOKEN_BINARYOP

See Also:

• Constant Field Values

TOKEN_PRE_UNARYOP

public static final int TOKEN_PRE_UNARYOP

See Also:

• Constant Field Values

TOKEN_UNARY_OR_BINARY_OP

public static final int TOKEN_UNARY_OR_BINARY_OP

See Also:

• Constant Field Values

TOKEN_LBRACKET

public static final int TOKEN_LBRACKET

See Also:

• Constant Field Values

TOKEN_RBRACKET

public static final int TOKEN_RBRACKET

See Also:

• Constant Field Values

TOKEN_TYPE_UNKNOWN

public static final int TOKEN_TYPE_UNKNOWN

See Also:

• Constant Field Values

TOKEN_UNKNOWN

public static final int TOKEN_UNKNOWN

See Also:

• Constant Field Values

Method Details

usageOnly

public static ExprParser usageOnly(ExprParser parser,
 RuleComponent parent)

getParser

@Deprecated
public static ExprParser getParser(String value)

Deprecated.

used for testing only

hasError

public boolean hasError()

getResultID

public DOID getResultID()

getReferences

public List<DOID> getReferences()

higherPrecedence

public static boolean higherPrecedence(String op1,
 String op2)

Determine whether op1 has higher precedence than op2. E.g., "*" has higher precedence than "+".

Parameters:

op1 -

op2 -

Returns:

isCalendar

public static boolean isCalendar(DOID typeID)

getTokens

public List<ExprParser.Token> getTokens()

getConcatTokens

public List<ExprParser.Token> getConcatTokens()

invalidate

public void invalidate()

Force invalidation of this expression parser