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

Class JoinExpression

java.lang.Object

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

net.ssehub.easy.instantiation.core.model.buildlangModel.JoinExpression

public class JoinExpression
extends Expression

Realizes a VIL join, typically over the variability model configuration and / or a project's artifact model.

Author:

Holger Eichelberger

Field Summary

Fields

Modifier and Type	Field	Description
private Expression	condition
private JoinVariableDeclaration[]	joinVariables
private TypeDescriptor<?>	type
private JoinVariableDeclaration[]	visibleVariables

Constructor Summary

Constructors

Constructor	Description
JoinExpression(JoinVariableDeclaration[] joinVariables, Expression condition)	Creates a new join expression.

Method Summary

Modifier and Type	Method	Description
java.lang.Object	accept(IExpressionVisitor visitor)	Visits the expression.
Expression	getCondition()	Returns the join condition.
JoinVariableDeclaration	getVariable(int index)	Returns the specified join variable.
int	getVariablesCount()	Returns the number of join variables.
JoinVariableDeclaration	getVisibleVariable(int index)	Returns the specified visible join variable.
int	getVisibleVariablesCount()	Returns the number of visible join variables.
TypeDescriptor<?>	inferType()	Infers the type of this expression including the type of the contained sub-expressions.

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

joinVariables

private JoinVariableDeclaration[] joinVariables

visibleVariables

private JoinVariableDeclaration[] visibleVariables

condition

private Expression condition

type

private TypeDescriptor<?> type

Constructor Detail

JoinExpression

public JoinExpression(JoinVariableDeclaration[] joinVariables,
                      Expression condition)
               throws VilException

Creates a new join expression.

Parameters:

joinVariables - the join variables (must not be null and must contain at least two variables although a higher number might be not supported)

condition - the join condition, may be null

Throws:

VilException - in case that structural or semantic constraints are not satisfied

Method Detail

getVariablesCount

public int getVariablesCount()

Returns the number of join variables.

Returns:

the number of join variables

getVariable

public JoinVariableDeclaration getVariable(int index)

Returns the specified join variable.

Parameters:

index - the 0-based index denoting the variable to be returned

Returns:

the specified join variable

Throws:

java.lang.IndexOutOfBoundsException - in case that index < 0 || index >=getVariablesCount()

getVisibleVariablesCount

public int getVisibleVariablesCount()

Returns the number of visible join variables.

Returns:

the number of visible join variables

getVisibleVariable

public JoinVariableDeclaration getVisibleVariable(int index)

Returns the specified visible join variable.

Parameters:

index - the 0-based index denoting the variable to be returned

Returns:

the specified visible join variable

Throws:

java.lang.IndexOutOfBoundsException - in case that index < 0 || index >=getVisibleVariablesCount()

getCondition

public Expression getCondition()

Returns the join condition.

Returns:

the join condition (may be empty)

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)