Package net.ssehub.easy.instantiation.core.model.expressions

Class FieldAccessExpression

java.lang.Object

net.ssehub.easy.instantiation.core.model.expressions.Expression

net.ssehub.easy.instantiation.core.model.expressions.FieldAccessExpression

public class FieldAccessExpression
extends Expression

Represents a field access.

Author:

Holger Eichelberger

Field Summary

Fields

Modifier and Type	Field	Description
private FieldDescriptor	field
private boolean	metaAccess
private FieldAccessExpression	nested
private VariableDeclaration	variable

Constructor Summary

Constructors

Constructor	Description
FieldAccessExpression()	Constructor for serialization.
FieldAccessExpression(VariableDeclaration variable, FieldDescriptor field)	Creates a field access expression.
FieldAccessExpression(FieldAccessExpression nested, FieldDescriptor field)	Creates a nested field access expression.
FieldAccessExpression(FieldDescriptor field)	Creates a static field access expression.

Method Summary

Modifier and Type	Method	Description
java.lang.Object	accept(IExpressionVisitor visitor)	Visits the expression.
void	enableMetaAccess()	Switches from evaluating the field expression (default) to evaluating the field itself.
FieldDescriptor	getField()	Returns the field.
FieldAccessExpression	getNested()	Returns the nested field access expression.
VariableDeclaration	getVariable()	Returns the variable to work on.
TypeDescriptor<?>	inferType()	Infers the type of this expression including the type of the contained sub-expressions.
boolean	isMetaAccess()	Returns whether the field itself or the value of the field expression shall be considered during execution.

Methods inherited from class net.ssehub.easy.instantiation.core.model.expressions.Expression

replaceEmptyLine

Methods inherited from class java.lang.Object

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

Field Detail

nested

private FieldAccessExpression nested

variable

private VariableDeclaration variable

field

private FieldDescriptor field

metaAccess

private boolean metaAccess

Constructor Detail

FieldAccessExpression

public FieldAccessExpression()

Constructor for serialization.

FieldAccessExpression

public FieldAccessExpression(FieldDescriptor field)
                      throws VilException

Creates a static field access expression.

Parameters:

field - the field to access

Throws:

VilException - in case that a static access cannot be done

FieldAccessExpression

public FieldAccessExpression(VariableDeclaration variable,
                             FieldDescriptor field)
                      throws VilException

Creates a field access expression.

Parameters:

variable - the variable

field - the field to access

Throws:

VilException - in case that a static access cannot be done

FieldAccessExpression

public FieldAccessExpression(FieldAccessExpression nested,
                             FieldDescriptor field)

Creates a nested field access expression.

Parameters:

nested - the nested expression (innermost created by the other constructor)

field - the field to access

Method Detail

getNested

public FieldAccessExpression getNested()

Returns the nested field access expression.

Returns:

the nested expression (null if getVariable() not null)

getVariable

public VariableDeclaration getVariable()

Returns the variable to work on.

Returns:

the variable (null if getNested() not null)

getField

public FieldDescriptor getField()

Returns the field.

Returns:

the field

inferType

public TypeDescriptor<?> inferType()
                            throws VilException

Description copied from class: Expression

Infers the type of this expression including the type of the contained sub-expressions.

Specified by:

inferType in class Expression

Returns:

the type of this expression

Throws:

VilException - in case that inferring the type fails

accept

public java.lang.Object accept(IExpressionVisitor visitor)
                        throws VilException

Description copied from class: Expression

Visits the expression.

Specified by:

accept in class Expression

Parameters:

visitor - the visitor

Returns:

the result of visiting this expression (may be null)

Throws:

VilException - in case that visiting fails (e.g., execution)

isMetaAccess

public boolean isMetaAccess()

Returns whether the field itself or the value of the field expression shall be considered during execution.

Returns:

true if the field itself shall be considered, false if the evaluation of the field expression shall be considered

enableMetaAccess

public void enableMetaAccess()

Switches from evaluating the field expression (default) to evaluating the field itself.