com.sun.ejb.containers.util
Class MethodMap

java.lang.Object
  java.util.AbstractMap<K,V>
      java.util.HashMap
          com.sun.ejb.containers.util.MethodMap

All Implemented Interfaces:

Serializable, Cloneable, Map

public final class MethodMap
extends HashMap

This is an optimized map for resolving java.lang.reflect.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,V>, AbstractMap.SimpleImmutableEntry<K,V>

Constructor Summary

MethodMap(Map methodMap)

MethodMap(Map methodMap, int numBuckets)

Method Summary

void	clear()
Object	get(Method m, int numParams)
Object	get(Object key)
Object	put(Object key, Object value)
void	putAll(Map t)
Object	remove(Object key)

Methods inherited from class java.util.HashMap

clone, containsKey, containsValue, entrySet, isEmpty, keySet, 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 Detail

MethodMap

public MethodMap(Map methodMap)

MethodMap

public MethodMap(Map methodMap,
                 int numBuckets)

Method Detail

put

public Object put(Object key,
                  Object value)

Specified by:

put in interface Map

Overrides:

put in class HashMap

putAll

public void putAll(Map t)

Specified by:

putAll in interface Map

Overrides:

putAll in class HashMap

remove

public Object remove(Object key)

Specified by:

remove in interface Map

Overrides:

remove in class HashMap

get

public Object get(Object key)

Specified by:

get in interface Map

Overrides:

get in class HashMap

get

public Object get(Method m,
                  int numParams)

clear

public void clear()

Specified by:

clear in interface Map

Overrides:

clear in class HashMap