public abstract class

LazyCompositeData

extends Object
implements Serializable CompositeData
java.lang.Object
   ↳ sun.management.LazyCompositeData
Known Direct Subclasses

Class Overview

This abstract class provides the implementation of the CompositeData interface. A CompositeData object will be lazily created only when the CompositeData interface is used. Classes that extends this abstract class will implement the getCompositeData() method. The object returned by the getCompositeData() is an instance of CompositeData such that the instance serializes itself as the type CompositeDataSupport.

Summary

Public Constructors
LazyCompositeData()
Public Methods
boolean containsKey(String key)
Returns true if and only if this CompositeData instance contains an item whose name is key.
boolean containsValue(Object value)
Returns true if and only if this CompositeData instance contains an item whose value is value.
boolean equals(Object obj)
Indicates whether some other object is "equal to" this one.
Object get(String key)
Returns the value of the item whose name is key.
Object[] getAll(String[] keys)
Returns an array of the values of the items whose names are specified by keys, in the same order as keys.
CompositeType getCompositeType()
Returns the composite type of this composite data instance.
int hashCode()
Returns a hash code value for the object.
String toString()
Returns a string representation of the object.
Collection values()
Returns an unmodifiable Collection view of the item values contained in this CompositeData instance.
Protected Methods
abstract CompositeData getCompositeData()
Returns the CompositeData representing this object.
static boolean isTypeMatched(TabularType type1, TabularType type2)
static boolean isTypeMatched(CompositeType type1, CompositeType type2)
Compares two CompositeTypes and returns true if all items in type1 exist in type2 and their item types are the same.
Object writeReplace()
Designate to a CompositeData object when writing to an output stream during serialization so that the receiver only requires JMX 1.2 classes but not any implementation specific class.
[Expand]
Inherited Methods
From class java.lang.Object
From interface javax.management.openmbean.CompositeData

Public Constructors

public LazyCompositeData ()

Public Methods

public boolean containsKey (String key)

Returns true if and only if this CompositeData instance contains an item whose name is key. If key is a null or empty String, this method simply returns false.

Parameters
key the key to be tested.
Returns
  • true if this CompositeData contains the key.

public boolean containsValue (Object value)

Returns true if and only if this CompositeData instance contains an item whose value is value.

Parameters
value the value to be tested.
Returns
  • true if this CompositeData contains the value.

public boolean equals (Object obj)

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

  • It is reflexive: for any non-null reference value x, x.equals(x) should return true.
  • It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
  • It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
  • It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
  • For any non-null reference value x, x.equals(null) should return false.

The equals method for class Object implements the most discriminating possible equivalence relation on objects; that is, for any non-null reference values x and y, this method returns true if and only if x and y refer to the same object (x == y has the value true).

Note that it is generally necessary to override the hashCode method whenever this method is overridden, so as to maintain the general contract for the hashCode method, which states that equal objects must have equal hash codes.

Parameters
obj the reference object with which to compare.
Returns
  • true if this object is the same as the obj argument; false otherwise.

public Object get (String key)

Returns the value of the item whose name is key.

Parameters
key the name of the item.
Returns
  • the value associated with this key.

public Object[] getAll (String[] keys)

Returns an array of the values of the items whose names are specified by keys, in the same order as keys.

Parameters
keys the names of the items.
Returns
  • the values corresponding to the keys.

public CompositeType getCompositeType ()

Returns the composite type of this composite data instance.

Returns
  • the type of this CompositeData.

public int hashCode ()

Returns a hash code value for the object. This method is supported for the benefit of hashtables such as those provided by java.util.Hashtable.

The general contract of hashCode is:

  • Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
  • If two objects are equal according to the equals(Object) method, then calling the hashCode method on each of the two objects must produce the same integer result.
  • It is not required that if two objects are unequal according to the equals(java.lang.Object) method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hashtables.

As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the JavaTM programming language.)

Returns
  • a hash code value for this object.

public String toString ()

Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.

The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of:

 getClass().getName() + '@' + Integer.toHexString(hashCode())
 

Returns
  • a string representation of the object.

public Collection values ()

Returns an unmodifiable Collection view of the item values contained in this CompositeData instance. The returned collection's iterator will return the values in the ascending lexicographic order of the corresponding item names.

Returns
  • the values.

Protected Methods

protected abstract CompositeData getCompositeData ()

Returns the CompositeData representing this object. The returned CompositeData object must be an instance of javax.management.openmbean.CompositeDataSupport class so that no implementation specific class is required for unmarshalling besides JMX 1.2 classes.

protected static boolean isTypeMatched (TabularType type1, TabularType type2)

protected static boolean isTypeMatched (CompositeType type1, CompositeType type2)

Compares two CompositeTypes and returns true if all items in type1 exist in type2 and their item types are the same.

protected Object writeReplace ()

Designate to a CompositeData object when writing to an output stream during serialization so that the receiver only requires JMX 1.2 classes but not any implementation specific class.