API java : MBeanAttributeInfo

javax.management
Class MBeanAttributeInfo

java.lang.Object
  javax.management.MBeanFeatureInfo
      javax.management.MBeanAttributeInfo

All Implemented Interfaces:

Serializable, Cloneable

Direct Known Subclasses:

ModelMBeanAttributeInfo, OpenMBeanAttributeInfoSupport

public class MBeanAttributeInfo
extends MBeanFeatureInfo
implements Serializable, Cloneable

Describes an MBean attribute exposed for management. Instances of this class are immutable. Subclasses may be mutable but this is not recommended.

Since:

1.5

See Also:

Serialized Form

MBeanAttributeInfo

public MBeanAttributeInfo(String name,
                          String type,
                          String description,
                          boolean isReadable,
                          boolean isWritable,
                          boolean isIs)
                   throws IllegalArgumentException

Constructs an MBeanAttributeInfo object.

Parameters:

name - The name of the attribute.

type - The type or class name of the attribute.

description - A human readable description of the attribute.

isReadable - True if the attribute has a getter method, false otherwise.

isWritable - True if the attribute has a setter method, false otherwise.

isIs - True if this attribute has an "is" getter, false otherwise.

Throws:

IllegalArgumentException

MBeanAttributeInfo

public MBeanAttributeInfo(String name,
                          String description,
                          Method getter,
                          Method setter)
                   throws IntrospectionException

This constructor takes the name of a simple attribute, and Method objects for reading and writing the attribute.

Parameters:

name - The programmatic name of the attribute.

description - A human readable description of the attribute.

getter - The method used for reading the attribute value. May be null if the property is write-only.

setter - The method used for writing the attribute value. May be null if the attribute is read-only.

Throws:

IntrospectionException - There is a consistency problem in the definition of this attribute.

clone

public Object clone()

Returns a shallow clone of this instance. The clone is obtained by simply calling super.clone(), thus calling the default native shallow cloning mechanism implemented by Object.clone(). No deeper cloning of any internal field is made.

Since this class is immutable, cloning is chiefly of interest to subclasses.

Overrides:

clone in class Object

Returns:

a clone of this instance.

See Also:

Cloneable

getType

public String getType()

Returns the class name of the attribute.

Returns:

the class name.

isReadable

public boolean isReadable()

Whether the value of the attribute can be read.

Returns:

True if the attribute can be read, false otherwise.

isWritable

public boolean isWritable()

Whether new values can be written to the attribute.

Returns:

True if the attribute can be written to, false otherwise.

isIs

public boolean isIs()

Indicates if this attribute has an "is" getter.

Returns:

true if this attribute has an "is" getter.

equals

public boolean equals(Object o)

Compare this MBeanAttributeInfo to another.

Overrides:

equals in class MBeanFeatureInfo

Parameters:

o - the object to compare to.

Returns:

true iff o is an MBeanAttributeInfo such that its MBeanFeatureInfo.getName(), getType(), MBeanFeatureInfo.getDescription(), isReadable(), isWritable(), and isIs() values are equal (not necessarily identical) to those of this MBeanAttributeInfo.

See Also:

Object.hashCode(), Hashtable

hashCode

public int hashCode()

Description copied from class: Object

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 Object.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 Java^TM programming language.)

Overrides:

hashCode in class MBeanFeatureInfo

Returns:

a hash code value for this object.

See Also:

Object.equals(java.lang.Object), Hashtable