jdk.internal.jvmci.meta

Class MethodIdMap<V>

java.lang.Object

jdk.internal.jvmci.meta.MethodIdMap<V>

Type Parameters:

V - the type of the values in the map

public class MethodIdMap<V>
extends Object

A map whose keys are MethodIdHolders. This data structure can be used for mapping identifiers to methods without requiring eager resolution of the latter (e.g., to ResolvedJavaMethods) and has retrieval as fast as array indexing. The constraints on using such a map are:

• at most one value can be added for any key
• no more entries can be added after the first retrieval

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	MethodIdMap.MethodKey<T> Key for a method.

Field Summary

Fields

Modifier and Type	Field and Description
private V[]	entries Entry array that is initialized upon first call to get(MethodIdHolder).
private static int	INITIAL_CAPACITY
private MetaAccessProvider	metaAccess
private int	minId The minimum id for a key in this map.
private List<MethodIdMap.MethodKey<V>>	registrations Initial list of entries.

Constructor Summary

Constructors

Constructor and Description
MethodIdMap(MetaAccessProvider metaAccess)

Method Summary

Modifier and Type	Method and Description
protected V[]	allocateEntries(int length)
boolean	containsKey(MethodIdMap.MethodKey<V> key) Determines if a method denoted by a given MethodIdMap.MethodKey is in this map.
void	createEntries()
V	get(MethodIdHolder method)
MetaAccessProvider	getMetaAccess()
MethodIdMap.MethodKey<V>	put(V value, boolean isStatic, boolean isOptional, Class<?> declaringClass, String name, Class<?>... argumentTypes) Adds an entry to this map for a specified method.
int	size()
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

metaAccess

private final MetaAccessProvider metaAccess

registrations

private final List<MethodIdMap.MethodKey<V>> registrations

Initial list of entries.

entries

private volatile V[] entries

Entry array that is initialized upon first call to get(MethodIdHolder). Note: this must be volatile since double-checked locking is used to initialize it

minId

private int minId

The minimum id for a key in this map.

INITIAL_CAPACITY

private static final int INITIAL_CAPACITY

See Also:

Constant Field Values

Constructor Detail

MethodIdMap

public MethodIdMap(MetaAccessProvider metaAccess)

Method Detail

put

public MethodIdMap.MethodKey<V> put(V value,
                                    boolean isStatic,
                                    boolean isOptional,
                                    Class<?> declaringClass,
                                    String name,
                                    Class<?>... argumentTypes)

Adds an entry to this map for a specified method.

Parameters:

value - value to be associated with the specified method

isStatic - specifies if the method is static

isOptional - specifies if the method is optional

declaringClass - the class declaring the method

name - the name of the method

argumentTypes - the argument types of the method. Element 0 of this array must be declaringClass iff the method is non-static.

Returns:

an object representing the method

allocateEntries

protected V[] allocateEntries(int length)

containsKey

public boolean containsKey(MethodIdMap.MethodKey<V> key)

Determines if a method denoted by a given MethodIdMap.MethodKey is in this map.

get

public V get(MethodIdHolder method)

createEntries

public void createEntries()

toString

public String toString()

Overrides:

toString in class Object

getMetaAccess

public MetaAccessProvider getMetaAccess()

size

public int size()