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

Class CollectionMatchExpression

java.lang.Object

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

net.ssehub.easy.instantiation.core.model.buildlangModel.ruleMatch.AbstractRuleMatchExpression

net.ssehub.easy.instantiation.core.model.buildlangModel.ruleMatch.CollectionMatchExpression

public class CollectionMatchExpression
extends AbstractRuleMatchExpression

Implements a collection match expression.

Author:

Holger Eichelberger

Field Summary

Fields

Modifier and Type	Field	Description
private Expression	expression
private java.lang.Object	resolved
private TypeDescriptor<? extends Collection<? extends IArtifact>>	type

Constructor Summary

Constructors

Constructor	Description
CollectionMatchExpression(Expression expression)	Creates a new collection match expression.

Method Summary

Modifier and Type	Method	Description
protected java.lang.Object	accept(IMatchVisitor visitor)	Accepts the given visitor for visiting.
boolean	contributesTo(AbstractRuleMatchExpression expression)	Returns whether this rule match expression may contribute to the fulfillment of expression.
java.lang.Object	determineExpected(AbstractRuleMatchExpression rhsExpr, java.lang.Object rhsValue)	Determines the expected value on the left side (represented by this object) based on the actual value for the corresponding right side.
Collection<?>	evaluate(IExpressionVisitor evaluator)	Evaluates this expression.
TypeDescriptor<?>	getEntryType()	Returns the entry type over which this match expression will be able to iterate.
Expression	getExpression()	Returns the collection expression.
TypeDescriptor<? extends Collection<? extends IArtifact>>	inferType()	Infers the type of this expression including the type of the contained sub-expressions.
(package private) void	resolve(java.lang.Object resolved)	Resolves the expression.

Methods inherited from class net.ssehub.easy.instantiation.core.model.buildlangModel.ruleMatch.AbstractRuleMatchExpression

accept, ensureType

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

expression

private Expression expression

resolved

private transient java.lang.Object resolved

type

private TypeDescriptor<? extends Collection<? extends IArtifact>> type

Constructor Detail

CollectionMatchExpression

public CollectionMatchExpression(Expression expression)
                          throws VilException

Creates a new collection match expression.

Parameters:

expression - an expression which evaluates to a collection

Throws:

VilException - in case that the expression does not evaluate to a collection

Method Detail

getExpression

public Expression getExpression()

Returns the collection expression.

Returns:

the collection expression

getEntryType

public TypeDescriptor<?> getEntryType()

Description copied from class: AbstractRuleMatchExpression

Returns the entry type over which this match expression will be able to iterate.

Specified by:

getEntryType in class AbstractRuleMatchExpression

Returns:

the entry type

inferType

public TypeDescriptor<? extends Collection<? extends IArtifact>> inferType()
                                                                    throws VilException

Description copied from class: Expression

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

Overrides:

inferType in class AbstractRuleMatchExpression

Returns:

the type of this expression

Throws:

VilException - in case that inferring the type fails

accept

protected java.lang.Object accept(IMatchVisitor visitor)
                           throws VilException

Description copied from class: AbstractRuleMatchExpression

Accepts the given visitor for visiting.

Specified by:

accept in class AbstractRuleMatchExpression

Parameters:

visitor - the match visitor used for visiting

Returns:

the result of visiting (may be null)

Throws:

VilException - in case of visiting / evaluation errors

determineExpected

public java.lang.Object determineExpected(AbstractRuleMatchExpression rhsExpr,
                                          java.lang.Object rhsValue)

Description copied from class: AbstractRuleMatchExpression

Determines the expected value on the left side (represented by this object) based on the actual value for the corresponding right side.

Specified by:

determineExpected in class AbstractRuleMatchExpression

Parameters:

rhsExpr - the (resolved) RHS expression

rhsValue - the RHS value

Returns:

the expected LHS value (null denotes no expectation)

contributesTo

public boolean contributesTo(AbstractRuleMatchExpression expression)

Description copied from class: AbstractRuleMatchExpression

Returns whether this rule match expression may contribute to the fulfillment of expression.

Specified by:

contributesTo in class AbstractRuleMatchExpression

Parameters:

expression - the expression to be considered (typically a RHS expression, while this is a LHS expression)

Returns:

true if this rule may contribute, false else

evaluate

public Collection<?> evaluate(IExpressionVisitor evaluator)
                       throws VilException

Description copied from class: AbstractRuleMatchExpression

Evaluates this expression. Some subtypes may define some kind of value resolution, e.g., for match expressions. This must be called before!

Specified by:

evaluate in class AbstractRuleMatchExpression

Parameters:

evaluator - the expression evaluator (in case that an actual expression must be evaluated as part of this evaluation).

Returns:

the evaluation result

Throws:

VilException - in case that evaluation fails

resolve

void resolve(java.lang.Object resolved)

Resolves the expression.

Parameters:

resolved - the resolved object