Package com.nt.udc.io

Class COSARExpr

java.lang.Object

com.nt.udc.io.COSARExpr

Direct Known Subclasses:

COSARExprAnd, COSARExprBinaryNumOp, COSARExprConcat, COSARExprDouble, COSARExprFunc, COSARExprHex2Dec, COSARExprID, COSARExprInt, COSARExprLen, COSARExprNot, COSARExprOr, COSARExprPos, COSARExprRandom, COSARExprRelationalNumOp, COSARExprStr2Time, COSARExprString, COSARExprSubstr, COSARExprTest, COSARExprTime2Str, COSARExprTimeNow, COSARExprUnaryMinus

public abstract class COSARExpr
extends Object

This class represents the abstract base-class for all OSAR expressions.

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	m_bIsConstant	This member variable is set to true if the expression's value is constant.

Constructor Summary

Constructors

Constructor	Description
COSARExpr()

Method Summary

Modifier and Type	Method	Description
COSARAttr	eval(HashMap symbols)	This function is used to evaluate the expression.
final boolean	isConstant()

Methods inherited from class java.lang.Object

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

Field Details

m_bIsConstant

protected boolean m_bIsConstant

This member variable is set to true if the expression's value is constant.

Constructor Details

COSARExpr

public COSARExpr()

Method Details

eval

public COSARAttr eval(HashMap symbols)
               throws Exception

This function is used to evaluate the expression. A symbol table is passed to help in retrieving the value of referenced symbols. The HashMap should contain values stored as COSARAttr objects, keyed by their associated symbol's name.

Returns:

The expression's value

Throws:

Exception

isConstant

public final boolean isConstant()

Returns:

true if the expression is constant