Package groovy.transform.stc

Class PickFirstResolver

java.lang.Object

groovy.transform.stc.ClosureSignatureConflictResolver

groovy.transform.stc.PickFirstResolver

public class PickFirstResolver
extends ClosureSignatureConflictResolver

Returns the first of several candidates found. This is useful if several types should be supported but only the first should be the default/inferred type. Other options in the list are obtained through explicitly typing the parameter(s).

Since:

2.5.0

Constructor Summary

Constructors

Constructor	Description
PickFirstResolver()

Method Summary

Modifier and Type	Method	Description
List<ClassNode[]>	resolve(List<ClassNode[]> candidates, ClassNode receiver, Expression arguments, ClosureExpression closure, MethodNode methodNode, SourceUnit sourceUnit, CompilationUnit compilationUnit, String[] options)

Methods inherited from class java.lang.Object

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

Constructor Details

PickFirstResolver

public PickFirstResolver()

Method Details

resolve

public List<ClassNode[]> resolve(List<ClassNode[]> candidates, ClassNode receiver, Expression arguments, ClosureExpression closure, MethodNode methodNode, SourceUnit sourceUnit, CompilationUnit compilationUnit, String[] options)

Overrides:

resolve in class ClosureSignatureConflictResolver

Parameters:

candidates - the list of signatures as determined after applying type hints and performing initial inference calculations

receiver - the receiver the method is being called on

arguments - the arguments for the closure

closure - the closure expression under analysis

methodNode - the method for which a Closure parameter was annotated with ClosureParams

sourceUnit - the source unit of the file being compiled

compilationUnit - the compilation unit of the file being compiled

options - the options, corresponding to the ClosureParams.options() found on the annotation

Returns:

a non-null list of signatures, where a signature corresponds to an array of class nodes, each of them matching a parameter. A list with more than one element indicates that all ambiguities haven't yet been resolved.