edu.mit.ai.psg.jevaES
Class JNEInstanceOfExpression

java.lang.Object
  |
  +--edu.mit.ai.psg.jevaES.SimpleNode
        |
        +--edu.mit.ai.psg.jevaES.JevaNode
              |
              +--edu.mit.ai.psg.jevaES.ExpressionNode
                    |
                    +--edu.mit.ai.psg.jevaES.JNEInstanceOfExpression

public class JNEInstanceOfExpression

extends ExpressionNode

Jeva parse Node for Expr instanceof Class [JavaLangSpec1.0 sec15.19.2 Type Comparison Operator instanceof]

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

children, id, parent

Method Summary

boolean	computeIsConstant(IEnv env) Compute whether this expression is a constant (nodes should not call this method directly).
Class	computeType(IEnv env) checks for legal subexpression and class types [JLS1.0sec15.19.2]
Object	eval(IEnv env) [JavaLangSpec1.0 sec15.19.2 Type Comparison Operator instanceof]
IExpressionNode	getExpressionNode()
JNType	getTypeNode()

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

getType, getValue, isConstant

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

getBeginToken, getEndToken, notVerified, print, print, printToken, printToString, printToString, setBeginToken, setEndToken, shouldNotHappen, shouldNotHappen, shouldNotHappen

Methods inherited from class edu.mit.ai.psg.jevaES.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

getExpressionNode

public IExpressionNode getExpressionNode()

getTypeNode

public JNType getTypeNode()

computeType

public Class computeType(IEnv env)
                  throws VerifyingException

checks for legal subexpression and class types [JLS1.0sec15.19.2]

Overrides:

computeType in class ExpressionNode

Tags copied from class: ExpressionNode

Parameters:

env - environment of name bindings, etc.

Throws:

VerifyingException - if expression is illegal

See Also:

EvalMethods.getType(IExpressionNode, IEnv)

computeIsConstant

public boolean computeIsConstant(IEnv env)
                          throws VerifyingException

Description copied from class: ExpressionNode

Compute whether this expression is a constant (nodes should not call this method directly). Called by the isConstant method.

Overrides:

computeIsConstant in class ExpressionNode

Tags copied from class: ExpressionNode

Parameters:

env - environment of name bindings, etc.

Throws:

VerifyingException - if expression is illegal.

See Also:

ExpressionNode.isConstant(edu.mit.ai.psg.jevaES.IEnv), EvalMethods.isConstant(IExpressionNode, IEnv)

eval

public Object eval(IEnv env)
            throws ThrowException

[JavaLangSpec1.0 sec15.19.2 Type Comparison Operator instanceof]

Overrides:

eval in class ExpressionNode

Tags copied from class: ExpressionNode

Parameters:

env - environment of name bindings, etc.

Throws:

ThrowException - if abruptly completed with an exception

See Also:

ExpressionNode.getValue(edu.mit.ai.psg.jevaES.IEnv), EvalMethods.eval(IExpressionNode, IEnv)