Module jdk.jdi

Package com.sun.jdi

Interface ClassLoaderReference

All Superinterfaces:

Mirror, ObjectReference, Value

public interface ClassLoaderReference
extends ObjectReference

A class loader object from the target VM. A ClassLoaderReference is an ObjectReference with additional access to classloader-specific information from the target VM. Instances ClassLoaderReference are obtained through calls to ReferenceType.classLoader()

Since:

1.3

See Also:

• ObjectReference

Field Summary

Fields declared in interface com.sun.jdi.ObjectReference

INVOKE_NONVIRTUAL, INVOKE_SINGLE_THREADED

Method Summary

Modifier and Type	Method	Description
List<ReferenceType>	definedClasses()	Returns a list of all classes defined by this class loader.
List<ReferenceType>	visibleClasses()	Returns a list of all classes which this class loader can find by name via ClassLoader::loadClass, Class::forName and bytecode linkage in the target VM.

Methods declared in interface com.sun.jdi.Mirror

toString, virtualMachine

Methods declared in interface com.sun.jdi.ObjectReference

disableCollection, enableCollection, entryCount, equals, getValue, getValues, hashCode, invokeMethod, isCollected, owningThread, referenceType, referringObjects, setValue, uniqueID, waitingThreads

Methods declared in interface com.sun.jdi.Value

type

Method Details

definedClasses

List<ReferenceType> definedClasses()

Returns a list of all classes defined by this class loader. No ordering of this list guaranteed. The returned list will include all reference types, including hidden classes or interfaces, loaded at least to the point of preparation, and types (like array) for which preparation is not defined.

Returns:

a List of ReferenceType objects mirroring types defined by this class loader. The list has length 0 if no types have been defined by this classloader.

visibleClasses

List<ReferenceType> visibleClasses()

Returns a list of all classes which this class loader can find by name via ClassLoader::loadClass, Class::forName and bytecode linkage in the target VM. That is, all classes for which this class loader has been recorded as an initiating loader.

Each class in the returned list was created by this class loader either by defining it directly or by delegation to another class loader (see JVMS 5.3).

The returned list does not include hidden classes or interfaces or array classes whose element type is a hidden class or interface. as they cannot be discovered by any class loader

The visible class list has useful properties with respect to the type namespace. A particular type name will occur at most once in the list. Each field or variable declared with that type name in a class defined by this class loader must be resolved to that single type.

No ordering of the returned list is guaranteed.

Note that unlike definedClasses() and VirtualMachine.allClasses(), some of the returned reference types may not be prepared. Attempts to perform some operations on unprepared reference types (e.g. fields()) will throw a ClassNotPreparedException. Use ReferenceType.isPrepared() to determine if a reference type is prepared.

Returns:

a List of ReferenceType objects mirroring classes which this class loader can find by name. The list has length 0 if no classes are visible to this classloader.

See Also:

• JVM TI GetClassLoaderClasses