Package com.sun.ejb.containers.util

Class MethodMap

java.lang.Object

java.util.AbstractMap<K,V>

java.util.HashMap<Method,InvocationInfo>

com.sun.ejb.containers.util.MethodMap

All Implemented Interfaces:

Serializable, Cloneable, Map<Method,InvocationInfo>

public final class MethodMap
extends HashMap<Method,InvocationInfo>

This is an optimized map for resolving Method objects.

Doing a method lookup, even on an unsynchronized Map, can be an expensive operation, in many cases taking multiple microseconds. In most situations this overhead is negligible, but it can be noticeable when performed in the common path of a local ejb invocation, where our goal is to be as fast as a raw java method call.

A MethodMap must be created with an existing Map and is immutable after construction(except for clear()).

It does not support the optional Map operations put, putAll, and remove. NOTE that these operations could be implemented but are not necessary at this point since the main use is for the container's method info, which is invariant after initialization.

As this is a map for Method objects, null keys are not supported. This map is unsynchronized.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.util.AbstractMap

AbstractMap.SimpleEntry<K extends Object,V extends Object>, AbstractMap.SimpleImmutableEntry<K extends Object,V extends Object>

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K extends Object,V extends Object>

Constructor Summary

Constructors

Constructor	Description
MethodMap(Map<Method,InvocationInfo> methodMap)
MethodMap(Map<Method,InvocationInfo> methodMap, int numBuckets)

Method Summary

Modifier and Type	Method	Description
void	clear()
InvocationInfo	get(Object key)
InvocationInfo	get(Method m, int numParams)
InvocationInfo	put(Method key, InvocationInfo value)
void	putAll(Map<? extends Method,? extends InvocationInfo> t)
InvocationInfo	remove(Object key)

Methods inherited from class java.util.HashMap

clone, compute, computeIfAbsent, computeIfPresent, containsKey, containsValue, entrySet, forEach, getOrDefault, isEmpty, keySet, merge, putIfAbsent, remove, replace, replace, replaceAll, size, values

Methods inherited from class java.util.AbstractMap

equals, hashCode, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map

equals, hashCode

Constructor Details

MethodMap

public MethodMap(Map<Method,InvocationInfo> methodMap)

MethodMap

public MethodMap(Map<Method,InvocationInfo> methodMap,
 int numBuckets)

Method Details

put

public InvocationInfo put(Method key,
 InvocationInfo value)

Specified by:

put in interface Map<Method,InvocationInfo>

Overrides:

put in class HashMap<Method,InvocationInfo>

putAll

public void putAll(Map<? extends Method,? extends InvocationInfo> t)

Specified by:

putAll in interface Map<Method,InvocationInfo>

Overrides:

putAll in class HashMap<Method,InvocationInfo>

remove

public InvocationInfo remove(Object key)

Specified by:

remove in interface Map<Method,InvocationInfo>

Overrides:

remove in class HashMap<Method,InvocationInfo>

get

public InvocationInfo get(Object key)

Specified by:

get in interface Map<Method,InvocationInfo>

Overrides:

get in class HashMap<Method,InvocationInfo>

get

public InvocationInfo get(Method m,
 int numParams)

clear

public void clear()

Specified by:

clear in interface Map<Method,InvocationInfo>

Overrides:

clear in class HashMap<Method,InvocationInfo>