edu.mit.ai.psg.jeva
Class JNEEqualityExpression

java.lang.Object
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  +--edu.mit.ai.psg.jeva.SimpleNode
        |
        +--edu.mit.ai.psg.jeva.JevaNode
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              +--edu.mit.ai.psg.jeva.ExpressionNode
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                    +--edu.mit.ai.psg.jeva.LeftAssociativeOperatorExpression
                          |
                          +--edu.mit.ai.psg.jeva.JNEEqualityExpression

public class JNEEqualityExpression

extends LeftAssociativeOperatorExpression

implements JevaParserConstants

Jeva parse Node for == and != Expressions [JavaLangSpec 1.0 sec 15.20 Equality Operators].

Fields inherited from class edu.mit.ai.psg.jeva.SimpleNode

children, id, parent

Fields inherited from interface edu.mit.ai.psg.jeva.JevaParserConstants

_DEFAULT, ABSTRACT, ANDASSIGN, ASSIGN, BANG, BIT_AND, BIT_OR, BOOLEAN, BREAK, BYTE, CASE, CATCH, CHAR, CHARACTER_LITERAL, CLASS, COLON, COMMA, CONST, CONTINUE, DECIMAL_LITERAL, DECR, DEFAULT, DIGIT, DO, DOT, DOUBLE, ELSE, EOF, EQ, EXPONENT, EXTENDS, FALSE, FINAL, FINALLY, FLOAT, FLOATING_POINT_LITERAL, FOR, FORMAL_COMMENT, GE, GOTO, GT, HEX_LITERAL, HOOK, IDENTIFIER, IF, IMPLEMENTS, IMPORT, INCR, INSTANCEOF, INT, INTEGER_LITERAL, INTERFACE, LBRACE, LBRACKET, LE, LETTER, LONG, LPAREN, LSHIFT, LSHIFTASSIGN, LT, MINUS, MINUSASSIGN, MULTI_LINE_COMMENT, NATIVE, NE, NEW, NULL, OCTAL_LITERAL, ORASSIGN, PACKAGE, PLUS, PLUSASSIGN, PRIVATE, PROTECTED, PUBLIC, RBRACE, RBRACKET, REM, REMASSIGN, RETURN, RPAREN, RSIGNEDSHIFT, RSIGNEDSHIFTASSIGN, RUNSIGNEDSHIFT, RUNSIGNEDSHIFTASSIGN, SC_AND, SC_OR, SEMICOLON, SHORT, SINGLE_LINE_COMMENT, SLASH, SLASHASSIGN, STAR, STARASSIGN, STATIC, STRING_LITERAL, SUPER, SWITCH, SYNCHRONIZED, THIS, THROW, THROWS, TILDE, tokenImage, TRANSIENT, TRUE, TRY, VOID, VOLATILE, WHILE, WHITE_SPACE, XOR, XORASSIGN

Method Summary

Object	binaryCombine(Token operator, Object accumResult, Object nextResult) [JavaLangSpec 1.0 sec 15.20 Equality Operators]
IClass	binaryCombineTypes(Token operator, IClass leftType, IClass rightType) operands must either both be numeric, both be boolean, or both be references or null [JavaLangSpec 1.0 sec 15.20]
Object	jjtAccept(IJevaVisitor visitor, Object data) Accept a visitor.

Methods inherited from class edu.mit.ai.psg.jeva.LeftAssociativeOperatorExpression

computeIsConstant, computeType, eval

Methods inherited from class edu.mit.ai.psg.jeva.ExpressionNode

getType, getType, getValue, isConstant

Methods inherited from class edu.mit.ai.psg.jeva.JevaNode

checkInsertionPoint, find2ndTokenBeforeEndBody, findChildIndex, findPrecedingToken, findTokenBeforeChild, findTokenBeforeChild, findTokenBeforeEnd, getBeginToken, getEndToken, insertChildTokens, insertNewChildAfter, insertNewChildAt, insertNewChildBefore, jnGetChild, jnGetParent, notVerified, print, print, printSpecialTokens, printToken, printToString, printToString, removeChild, removeChildTokens, replaceChild, replaceChild, setBeginToken, setEndToken, shouldNotHappen, shouldNotHappen, shouldNotHappen, updateEndTokens, updateEndTokensPriorChild, updateEndTokensPriorNode, updateEndTokensPriorNode

Methods inherited from class edu.mit.ai.psg.jeva.SimpleNode

dump, jjtAddChild, jjtClose, jjtGetChild, jjtGetNumChildren, jjtGetParent, jjtOpen, jjtSetParent, toString, toString

Methods inherited from class java.lang.Object

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

Method Detail

jjtAccept

public Object jjtAccept(IJevaVisitor visitor,
                        Object data)

Description copied from interface: IJevaNode

Accept a visitor. For visitor design pattern: jjtAccept must simply

  return visitor.visit(this, data);  

which dispatches on the type of this to appropriate method of visitor

Overrides:

jjtAccept in class JevaNode

binaryCombineTypes

public IClass binaryCombineTypes(Token operator,
                                 IClass leftType,
                                 IClass rightType)

operands must either both be numeric, both be boolean, or both be references or null [JavaLangSpec 1.0 sec 15.20]

Overrides:

binaryCombineTypes in class LeftAssociativeOperatorExpression

Tags copied from class: LeftAssociativeOperatorExpression

Parameters:

operator - is the Token between expressions (e.g., +,-,*,/,...)

accumResult - is result of accumulating the expressions to the left of the operator.

nextResult - is result of evaluating the next expression to the right of the operator.

Returns:

IClass of result of the combining accumResult and nextResult with operator.

Throws:

IllegalArgumentException - if types not acceptable

binaryCombine

public Object binaryCombine(Token operator,
                            Object accumResult,
                            Object nextResult)
                     throws ThrowException

[JavaLangSpec 1.0 sec 15.20 Equality Operators]

Overrides:

binaryCombine in class LeftAssociativeOperatorExpression

Tags copied from class: LeftAssociativeOperatorExpression

Parameters:

operator - is the Token between expressions (e.g., +,-,*,/,...)

accumResult - is result of accumulating the expressions to the left of the operator.

nextResult - is result of evaluating the next expression to the right of the operator.

Returns:

result of the combining accumResult and nextResult with operator

Throws:

ThrowException - wraps exception thrown by operator.