org.jikesrvm.compilers.opt.inlining

Class InterfaceHierarchy

java.lang.Object

org.jikesrvm.compilers.opt.inlining.InterfaceHierarchy

public class InterfaceHierarchy
extends Object

This class holds, for each interface, the set of initialized classes that implement the interface.

Field Summary

Fields

Modifier and Type	Field and Description
private static ImmutableEntryHashMapRVM<RVMClass,ImmutableEntryHashSetRVM<RVMClass>>	interfaceMapping a mapping from RVMClass (an interface) to a set of classes that claim to implement this interface.

Constructor Summary

Constructors

Constructor and Description
InterfaceHierarchy()

Method Summary

Modifier and Type	Method and Description
private static ImmutableEntryHashSetRVM<RVMClass>	allImplementors(RVMClass I)
private static ImmutableEntryHashSetRVM<RVMClass>	allSubClasses(RVMClass C)
private static ImmutableEntryHashSetRVM<RVMClass>	findOrCreateSet(RVMClass I)
static RVMMethod	getUniqueImplementation(RVMMethod foo) If, in the current class hierarchy, there is exactly one method that defines the interface method foo, then return the unique implementation.
private static void	noteImplements(RVMClass c, RVMClass I) Notes that a class implements an interface.
static void	notifyClassInitialized(RVMClass c) Notify this dictionary that a new class has been initialized.

Methods inherited from class java.lang.Object

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

Field Detail

interfaceMapping

private static final ImmutableEntryHashMapRVM<RVMClass,ImmutableEntryHashSetRVM<RVMClass>> interfaceMapping

a mapping from RVMClass (an interface) to a set of classes that claim to implement this interface.

Constructor Detail

InterfaceHierarchy

public InterfaceHierarchy()

Method Detail

notifyClassInitialized

public static void notifyClassInitialized(RVMClass c)

Notify this dictionary that a new class has been initialized. This method updates the dictionary to record the interface implementors.

Parameters:

c - class that was initialized

noteImplements

private static void noteImplements(RVMClass c,
                                   RVMClass I)

Notes that a class implements an interface.

Parameters:

c - the class that implements the interface

I - the implemented interface

findOrCreateSet

private static ImmutableEntryHashSetRVM<RVMClass> findOrCreateSet(RVMClass I)

Parameters:

I - the implemented interface

Returns:

the set of classes that implement a given interface. Create a set if none found.

allImplementors

private static ImmutableEntryHashSetRVM<RVMClass> allImplementors(RVMClass I)

Parameters:

I - the implemented interface

Returns:

the set of all classes known to implement the interface

allSubClasses

private static ImmutableEntryHashSetRVM<RVMClass> allSubClasses(RVMClass C)

Parameters:

C - an interface

Returns:

the set of all classes known to extend C

getUniqueImplementation

public static RVMMethod getUniqueImplementation(RVMMethod foo)

If, in the current class hierarchy, there is exactly one method that defines the interface method foo, then return the unique implementation. If there is not a unique implementation, return null.

Parameters:

foo - an interface method

Returns:

the unique implementation if it exists, null otherwise