edu.mit.ai.psg.jeva
Class JNEConditionalExpression

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

public class JNEConditionalExpression

extends ExpressionNode

Jeva parse Node for ? : Expressions. [Java Lang Spec 1.0 sec 15.24 Conditional Operator ? :]

Author:

CarlManning, caroma@ai.mit.edu
Copyright (c) 1997, 1998 Massachusetts Institute of Technology

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

children, id, parent

Method Summary

boolean	computeIsConstant(IEnv env) constant if test is constant and corresponding branch is constant, or if branches are equal constants.
IClass	computeType(IEnv env) [Java Lang Spec 1.0 sec 15.24 Conditional Operator ? :] 3 children: testExpr, thenExpr, elseExpr
Object	eval(IEnv env)
IExpressionNode	getElseExpression()
IExpressionNode	getTestExpression()
IExpressionNode	getThenExpression()
Object	jjtAccept(IJevaVisitor visitor, Object data)

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, print, print, printToken, printToString, printToString, removeChild, removeChildTokens, replaceChild, replaceChild, setBeginToken, setEndToken, 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)

Overrides:

jjtAccept in class JevaNode

getTestExpression

public IExpressionNode getTestExpression()

getThenExpression

public IExpressionNode getThenExpression()

getElseExpression

public IExpressionNode getElseExpression()

computeType

public IClass computeType(IEnv env)
                   throws VerifyingException

[Java Lang Spec 1.0 sec 15.24 Conditional Operator ? :] 3 children: testExpr, thenExpr, elseExpr

Overrides:

computeType in class ExpressionNode

computeIsConstant

public boolean computeIsConstant(IEnv env)
                          throws VerifyingException

constant if test is constant and corresponding branch is constant, or if branches are equal constants.

Overrides:

computeIsConstant in class ExpressionNode

eval

public Object eval(IEnv env)
            throws ThrowException

Overrides:

eval in class ExpressionNode