Package org.codehaus.groovy.runtime.metaclass

Class PackedClosureMetaClass

java.lang.Object

groovy.lang.MetaClassImpl

org.codehaus.groovy.runtime.metaclass.PackedClosureMetaClass

All Implemented Interfaces:

MetaClass, MetaObjectProtocol, MutableMetaClass

public final class PackedClosureMetaClass
extends MetaClassImpl

The stock metaclass for PackedClosure, giving packed closures their own MOP standing (the analog of ClosureMetaClass for generated closure classes, whose per-class metaclasses packed closures deliberately do not have).

invokeMethod("call"/"doCall") dispatches straight to the adapter — a plain virtual call that routes to the hosting class's dispatch tables — with no reflection anywhere on the path, and, matching ClosureMetaClass, without consulting categories for the closure-invocation names (categories have never applied to closure doCall dispatch). Each fixed-arity family member class gets its own instance of this metaclass from the registry (a per-class registry can only be per-adapter-class), so class-level metaclass changes affect every packed closure of that member's arity; per-instance setMetaClass is honoured as usual — the adapter's dispatch guard routes perturbed instances through the replacement's invokeMethod.

respondsTo(Object, String, Object[]) is instance-faithful: the fixed-arity family member's doCall(s) are erased to Object parameters (and FixedN's is varargs), so the answer for the closure-invocation names is additionally filtered by the instance's declared parameter types (which the adapter carries for exactly this purpose). Purely class-level introspection (pickMethod, getMetaMethods) necessarily reflects the shared adapter class, not any single literal.

Since:

6.0.0

Nested Class Summary

Nested classes/interfaces inherited from class groovy.lang.MetaClassImpl

MetaClassImpl.MetaConstructor

Field Summary

Fields inherited from class groovy.lang.MetaClassImpl

EMPTY_ARGUMENTS, getPropertyMethod, INVOKE_METHOD_METHOD, invokeMethodMethod, isGroovyObject, isMap, metaMethodIndex, METHOD_MISSING, PROPERTY_MISSING, registry, setPropertyMethod, STATIC_METHOD_MISSING, STATIC_PROPERTY_MISSING, theCachedClass, theClass

Constructor Summary

Constructors

Constructor	Description
PackedClosureMetaClass(MetaClassRegistry registry, Class theClass)

Method Summary

Modifier and Type	Method	Description
Object	invokeMethod(Class sender, Object object, String methodName, Object[] originalArguments, boolean isCallToSuper, boolean fromInsideClass)	Invokes a method on the given receiver for the specified arguments.
List<MetaMethod>	respondsTo(Object obj, String name, Object[] argTypes)	Returns an object satisfying Groovy truth if the implementing MetaClass responds to a method with the given name and arguments types.

Methods inherited from class groovy.lang.MetaClassImpl

addMetaBeanProperty, addMetaMethod, addMetaMethodToIndex, addNewInstanceMethod, addNewStaticMethod, applyPropertyDescriptors, checkIfGroovyObjectMethod, checkInitalised, chooseConstructor, chooseMethod, chooseNamedArgCompatibleConstructor, clearInvocationCaches, createErrorMessageForAmbiguity, createTransformMetaMethod, doChooseMostSpecificParams, dropMethodCache, dropStaticMethodCache, findMethodInClassHierarchy, findMixinMethod, findOwnMethod, findPropertyInClassHierarchy, getAdditionalMetaMethods, getAttribute, getAttribute, getAttribute, getClassInfo, getClassNode, getEffectiveGetMetaProperty, getMetaMethod, getMetaMethods, getMetaProperty, getMethods, getMethodWithCaching, getMethodWithCaching, getMethodWithoutCaching, getNonClosureOuter, getProperties, getProperty, getProperty, getRegistry, getStaticMetaMethod, getSubclassMetaMethods, getSuperClasses, getTheCachedClass, getTheClass, getVersion, handleMatches, hasCustomInvokeMethod, hasCustomStaticInvokeMethod, hasProperty, incVersion, initialize, invokeConstructor, invokeMethod, invokeMethod, invokeMissingMethod, invokeMissingProperty, invokeStaticMethod, invokeStaticMissingProperty, isGroovyObject, isInitialized, isModified, isPermissivePropertyAccess, onGetPropertyFoundInHierarchy, onInvokeMethodFoundInHierarchy, onMixinMethodFound, onSetPropertyFoundInHierarchy, onSuperMethodFoundInHierarchy, onSuperPropertyFoundInHierarchy, pickMethod, reinitialize, respondsTo, retrieveConstructor, retrieveConstructor, retrieveStaticMethod, selectConstructorAndTransformArguments, setAttribute, setAttribute, setInitialized, setPermissivePropertyAccess, setProperties, setProperty, setProperty, toString

Methods inherited from class java.lang.Object

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

Constructor Details

PackedClosureMetaClass

public PackedClosureMetaClass(MetaClassRegistry registry,
 Class theClass)

Method Details

invokeMethod

public Object invokeMethod(Class sender,
 Object object,
 String methodName,
 Object[] originalArguments,
 boolean isCallToSuper,
 boolean fromInsideClass)

Description copied from class: MetaClassImpl

Invokes a method on the given receiver for the specified arguments. The sender is the class that invoked the method on the object. The MetaClass will attempt to establish the method to invoke based on the name and arguments provided.

The isCallToSuper and fromInsideClass help the Groovy runtime perform optimisations on the call to go directly to the super class if necessary

Specified by:

invokeMethod in interface MetaClass

Overrides:

invokeMethod in class MetaClassImpl

Parameters:

sender - The java.lang.Class instance that invoked the method

object - The object which the method was invoked on

methodName - The name of the method

originalArguments - The arguments to the method

isCallToSuper - Whether the method is a call to a super class method

fromInsideClass - Whether the call was invoked from the inside or the outside of the class

Returns:

The return value of the method.

See Also:

• MetaClass.invokeMethod(Class, Object, String, Object[], boolean, boolean)

respondsTo

public List<MetaMethod> respondsTo(Object obj,
 String name,
 Object[] argTypes)

Description copied from interface: MetaObjectProtocol

Returns an object satisfying Groovy truth if the implementing MetaClass responds to a method with the given name and arguments types.

Note that this method's return value is based on realised methods and does not take into account objects or classes that implement invokeMethod or methodMissing

This method is "safe" in that it will always return a value and never throw an exception

Specified by:

respondsTo in interface MetaObjectProtocol

Overrides:

respondsTo in class MetaClassImpl

Parameters:

obj - The object to inspect

name - The name of the method of interest

argTypes - The argument types to match against

Returns:

A List of MetaMethods matching the argument types which will be empty if no matching methods exist

See Also:

• MetaObjectProtocol.respondsTo(Object, String, Object[])