gov.nasa.arc.brahms.vm.data
Class ExpressionValue

java.lang.Object
  gov.nasa.arc.brahms.vm.data.ExpressionValue

public class ExpressionValue
extends java.lang.Object

The ExpressionValue represents the resulting value for an expression located at the left or right hand side of a comparison.

Version:

$Revision: 1.4 $ $Date: 2009/11/23 22:13:33 $ $Author: rnado $

Author:

Ron van Hoof

Constructor Summary

ExpressionValue()
Constructor, creates a new ExpressionValue.

ExpressionValue(java.lang.Object value, int type)
Constructor, creates a new ExpressionValue specifying the resulting value after evaluating the expression.

Method Summary

void	addStatement(VMStatementCtx ctx) Add the specified statement context to the list of statements from which their right hand side values are used in evaluating the expression to come to the resulting value.
boolean	equals(java.lang.Object obj) Tests whether two ExpressionValue are equal
java.util.LinkedList	getStatements() Returns the statements from which the value was established
java.lang.Object	getValue() Returns the value for the expression
int	getValueType() Returns the value's type
void	setValue(java.lang.Object value) Sets the expression value
void	setValueType(int type) Sets the value's type

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionValue

public ExpressionValue()

Constructor, creates a new ExpressionValue.

ExpressionValue

public ExpressionValue(java.lang.Object value,
                       int type)

Constructor, creates a new ExpressionValue specifying the resulting value after evaluating the expression.

Parameters:

value - the resulting value of the expression

type - the type of the value

See Also:

IConstants.INT, IConstants.BYTE, IConstants.SHORT, IConstants.INT, IConstants.LONG, IConstants.FLOAT, IConstants.DOUBLE, IConstants.BOOLEAN, IConstants.STRING, IConstants.SYMBOL, IConstants.UDT, IConstants.JAVA_TYPE, IConstants.UNKNOWN

Method Detail

getValue

public final java.lang.Object getValue()

Returns the value for the expression

Returns:

Object the expression value

setValue

public final void setValue(java.lang.Object value)

Sets the expression value

Parameters:

value - the expression value

getValueType

public final int getValueType()

Returns the value's type

Returns:

int the value type

See Also:

IConstants.INT, IConstants.CHAR, IConstants.BYTE, IConstants.SHORT, IConstants.LONG, IConstants.FLOAT, IConstants.DOUBLE, IConstants.BOOLEAN, IConstants.STRING, IConstants.SYMBOL, IConstants.UDT, IConstants.JAVA_TYPE, IConstants.UNKNOWN

setValueType

public final void setValueType(int type)

Sets the value's type

Parameters:

type - the value type

See Also:

IConstants.INT, IConstants.CHAR, IConstants.BYTE, IConstants.SHORT, IConstants.LONG, IConstants.FLOAT, IConstants.DOUBLE, IConstants.BOOLEAN, IConstants.STRING, IConstants.SYMBOL, IConstants.UDT, IConstants.JAVA_TYPE, IConstants.UNKNOWN

addStatement

public final void addStatement(VMStatementCtx ctx)

Add the specified statement context to the list of statements from which their right hand side values are used in evaluating the expression to come to the resulting value.

Parameters:

ctx - the VMStatementCtx to be added

getStatements

public final java.util.LinkedList getStatements()

Returns the statements from which the value was established

Returns:

LinkedList the statements from which the value was established, null if the value wasn't acquired from any statements.

equals

public final boolean equals(java.lang.Object obj)

Tests whether two ExpressionValue are equal

Overrides:

equals in class java.lang.Object

Parameters:

obj - the ExpressionValue to be tested with for equality

Returns:

true if the two expression values are equal, false otherwise