Package nl.rrd.wool.expressions.types

Class AssignExpression

java.lang.Object

nl.rrd.wool.expressions.types.AssignExpression

All Implemented Interfaces:

Expression

public class AssignExpression
extends Object
implements Expression

Constructor Summary

Constructors

Constructor	Description
AssignExpression(Expression variableOperand, Token operator, Expression valueOperand)

Method Summary

Modifier and Type	Method	Description
Value	evaluate(Map<String,Object> variables)	Evaluates this expression using the specified variable values.
List<Expression>	getChildren()	Returns the child expressions of this expression.
List<Expression>	getDescendants()	Returns all descendant expressions of this expression.
Expression	getValueOperand()
String	getVariableName()
Set<String>	getVariableNames()	Returns all variable names that occur in this expression and its descendants.
Expression	getVariableOperand()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

AssignExpression

public AssignExpression(Expression variableOperand,
                        Token operator,
                        Expression valueOperand)
                 throws LineNumberParseException

Throws:

LineNumberParseException

Method Detail

getVariableOperand

public Expression getVariableOperand()

getVariableName

public String getVariableName()

getValueOperand

public Expression getValueOperand()

evaluate

public Value evaluate(Map<String,Object> variables)
               throws EvaluationException

Description copied from interface: Expression

Evaluates this expression using the specified variable values. The variable map may be modified as a result of an "assign" expression.

Specified by:

evaluate in interface Expression

Parameters:

variables - the variable values (can be null)

Returns:

the value of the expression

Throws:

EvaluationException - if the expression can't be evaluted with the specified variables

getChildren

public List<Expression> getChildren()

Description copied from interface: Expression

Returns the child expressions of this expression.

Specified by:

getChildren in interface Expression

Returns:

the child expressions

getDescendants

public List<Expression> getDescendants()

Description copied from interface: Expression

Returns all descendant expressions of this expression.

Specified by:

getDescendants in interface Expression

Returns:

the descendant expressions

getVariableNames

public Set<String> getVariableNames()

Description copied from interface: Expression

Returns all variable names that occur in this expression and its descendants.

Specified by:

getVariableNames in interface Expression

Returns:

the variable names

toString

public String toString()

Overrides:

toString in class Object