Module java.management
Package javax.management

## Class MBeanAttributeInfo

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

All Implemented Interfaces:
  Serializable, Cloneable, DescriptorRead

Direct Known Subclasses:
  ModelMBeanAttributeInfo, OpenMBeanAttributeInfoSupport

    public class MBeanAttributeInfo
    extends MBeanFeatureInfo
    implements 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

### Field Summary

### Fields inherited from class javax.management.MBeanFeatureInfo

`description, name`

### Constructor Summary

Constructors
Constructor and Description
`MBeanAttributeInfo(String name, String description, Method getter, Method setter)` This constructor takes the name of a simple attribute, and Method objects for reading and writing the attribute.
`MBeanAttributeInfo(String name, String type, String description, boolean isReadable, boolean isWritable, boolean isIs)` Constructs an `MBeanAttributeInfo` object.
`MBeanAttributeInfo(String name, String type, String description, boolean isReadable, boolean isWritable, boolean isIs, Descriptor descriptor)` Constructs an `MBeanAttributeInfo` object.

### Method Summary

All Methods Instance Methods Concrete Methods
`Object` `clone()` Returns a shallow clone of this instance.
`boolean` `equals(Object o)` Compare this MBeanAttributeInfo to another.
`String` `getType()` Returns the class name of the attribute.
`int` `hashCode()` Returns a hash code value for the object.
`boolean` `isIs()` Indicates if this attribute has an "is" getter.
`boolean` `isReadable()` Whether the value of the attribute can be read.
`boolean` `isWritable()` Whether new values can be written to the attribute.
`String` `toString()` Returns a string representation of the object.

### Methods inherited from class javax.management.MBeanFeatureInfo

`getDescription, getDescriptor, getName`

### Methods inherited from class java.lang.Object

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

### Constructor Detail

#### 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. The `Descriptor` of the constructed object will include fields contributed by any annotations on the `Method` objects that contain the `DescriptorKey` meta-annotation.

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.

#### MBeanAttributeInfo

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

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` - if `isIs` is true but `isReadable` is not, or if `isIs` is true and `type` is not `boolean` or `java.lang.Boolean`. (New code should always use `boolean` rather than `java.lang.Boolean`.)

#### MBeanAttributeInfo

    public MBeanAttributeInfo(String name,
                              String type,
                              String description,
                              boolean isReadable,
                              boolean isWritable,
                              boolean isIs,
                              Descriptor descriptor)

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.
  `descriptor` - The descriptor for the attribute. This may be null which is equivalent to an empty descriptor.
Throws:
  `IllegalArgumentException` - if `isIs` is true but `isReadable` is not, or if `isIs` is true and `type` is not `boolean` or `java.lang.Boolean`. (New code should always use `boolean` rather than `java.lang.Boolean`.)
Since:
  1.6

### Method Detail

#### 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.

#### toString

    public String toString()

Description copied from class: `Object`
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())

Overrides:
  `toString` in class `Object`
Returns:
  a string representation of the object.

#### 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 if and only if `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()`, `HashMap`

#### 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 hash tables such as those provided by `HashMap`.

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 hash tables.

As much as is reasonably practical, the hashCode method defined by class `Object` does return distinct integers for distinct objects. (The hashCode may or may not be implemented as some function of an object's memory address at some point in time.)

Overrides:
  `hashCode` in class `MBeanFeatureInfo`
Returns:
  a hash code value for this object.
See Also:
  `Object.equals(java.lang.Object)`, `System.identityHashCode(java.lang.Object)`