OpenMBeanInfoSupport (Java Platform SE 8 )
Keywords: javax.management.openmbean.OpenMBeanInfoSupport class
Date: 2026-04-17

compact3
javax.management.openmbean

## Class OpenMBeanInfoSupport

- java.lang.Object
- - javax.management.MBeanInfo
  - - javax.management.openmbean.OpenMBeanInfoSupport

- All Implemented Interfaces:
    Serializable, Cloneable, DescriptorRead, OpenMBeanInfo

      public class OpenMBeanInfoSupport
      extends MBeanInfo
      implements OpenMBeanInfo

  The `OpenMBeanInfoSupport` class describes the management information of an open MBean: it is a subclass of `MBeanInfo`, and it implements the `OpenMBeanInfo` interface. Note that an open MBean is recognized as such if its `getMBeanInfo()` method returns an instance of a class which implements the OpenMBeanInfo interface, typically `OpenMBeanInfoSupport`.
  Since:
    1.5
  See Also:
    Serialized Form

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `OpenMBeanInfoSupport(String className, String description, OpenMBeanAttributeInfo[] openAttributes, OpenMBeanConstructorInfo[] openConstructors, OpenMBeanOperationInfo[] openOperations, MBeanNotificationInfo[] notifications)` Constructs an `OpenMBeanInfoSupport` instance, which describes a class of open MBeans with the specified `className`, `description`, `openAttributes`, `openConstructors` , `openOperations` and `notifications`.
    `OpenMBeanInfoSupport(String className, String description, OpenMBeanAttributeInfo[] openAttributes, OpenMBeanConstructorInfo[] openConstructors, OpenMBeanOperationInfo[] openOperations, MBeanNotificationInfo[] notifications, Descriptor descriptor)` Constructs an `OpenMBeanInfoSupport` instance, which describes a class of open MBeans with the specified `className`, `description`, `openAttributes`, `openConstructors` , `openOperations`, `notifications`, and `descriptor`.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `boolean` | `equals(Object obj)` Compares the specified `obj` parameter with this `OpenMBeanInfoSupport` instance for equality.
    `int` | `hashCode()` Returns the hash code value for this `OpenMBeanInfoSupport` instance.
    `String` | `toString()` Returns a string representation of this `OpenMBeanInfoSupport` instance.

    - ### Methods inherited from class javax.management.MBeanInfo

      `clone, getAttributes, getClassName, getConstructors, getDescription, getDescriptor, getNotifications, getOperations`

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

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

    - ### Methods inherited from interface javax.management.openmbean.OpenMBeanInfo

      `getAttributes, getClassName, getConstructors, getDescription, getNotifications, getOperations`

- - ### Constructor Detail

    - #### OpenMBeanInfoSupport

          public OpenMBeanInfoSupport(String className,
                                      String description,
                                      OpenMBeanAttributeInfo[] openAttributes,
                                      OpenMBeanConstructorInfo[] openConstructors,
                                      OpenMBeanOperationInfo[] openOperations,
                                      MBeanNotificationInfo[] notifications)

      Constructs an `OpenMBeanInfoSupport` instance, which describes a class of open MBeans with the specified `className`, `description`, `openAttributes`, `openConstructors` , `openOperations` and `notifications`.

      The `openAttributes`, `openConstructors`, `openOperations` and `notifications` array parameters are internally copied, so that subsequent changes to the arrays referenced by these parameters have no effect on this instance.

      Parameters:
        `className` - The fully qualified Java class name of the open MBean described by this `OpenMBeanInfoSupport` instance.
        `description` - A human readable description of the open MBean described by this `OpenMBeanInfoSupport` instance.
        `openAttributes` - The list of exposed attributes of the described open MBean; Must be an array of instances of a subclass of `MBeanAttributeInfo`, typically `OpenMBeanAttributeInfoSupport`.
        `openConstructors` - The list of exposed public constructors of the described open MBean; Must be an array of instances of a subclass of `MBeanConstructorInfo`, typically `OpenMBeanConstructorInfoSupport`.
        `openOperations` - The list of exposed operations of the described open MBean. Must be an array of instances of a subclass of `MBeanOperationInfo`, typically `OpenMBeanOperationInfoSupport`.
        `notifications` - The list of notifications emitted by the described open MBean.
      Throws:
        `ArrayStoreException` - If `openAttributes`, `openConstructors` or `openOperations` is not an array of instances of a subclass of `MBeanAttributeInfo`, `MBeanConstructorInfo` or `MBeanOperationInfo` respectively.

    - #### OpenMBeanInfoSupport

          public OpenMBeanInfoSupport(String className,
                                      String description,
                                      OpenMBeanAttributeInfo[] openAttributes,
                                      OpenMBeanConstructorInfo[] openConstructors,
                                      OpenMBeanOperationInfo[] openOperations,
                                      MBeanNotificationInfo[] notifications,
                                      Descriptor descriptor)

      Constructs an `OpenMBeanInfoSupport` instance, which describes a class of open MBeans with the specified `className`, `description`, `openAttributes`, `openConstructors` , `openOperations`, `notifications`, and `descriptor`.

      The `openAttributes`, `openConstructors`, `openOperations` and `notifications` array parameters are internally copied, so that subsequent changes to the arrays referenced by these parameters have no effect on this instance.

      Parameters:
        `className` - The fully qualified Java class name of the open MBean described by this `OpenMBeanInfoSupport` instance.
        `description` - A human readable description of the open MBean described by this `OpenMBeanInfoSupport` instance.
        `openAttributes` - The list of exposed attributes of the described open MBean; Must be an array of instances of a subclass of `MBeanAttributeInfo`, typically `OpenMBeanAttributeInfoSupport`.
        `openConstructors` - The list of exposed public constructors of the described open MBean; Must be an array of instances of a subclass of `MBeanConstructorInfo`, typically `OpenMBeanConstructorInfoSupport`.
        `openOperations` - The list of exposed operations of the described open MBean. Must be an array of instances of a subclass of `MBeanOperationInfo`, typically `OpenMBeanOperationInfoSupport`.
        `notifications` - The list of notifications emitted by the described open MBean.
        `descriptor` - The descriptor for the MBean. This may be null which is equivalent to an empty descriptor.
      Throws:
        `ArrayStoreException` - If `openAttributes`, `openConstructors` or `openOperations` is not an array of instances of a subclass of `MBeanAttributeInfo`, `MBeanConstructorInfo` or `MBeanOperationInfo` respectively.
      Since:
        1.6

  - ### Method Detail

    - #### equals

          public boolean equals(Object obj)

      Compares the specified `obj` parameter with this `OpenMBeanInfoSupport` instance for equality.

      Returns `true` if and only if all of the following statements are true:

      - `obj` is non null,
      - `obj` also implements the `OpenMBeanInfo` interface,
      - their class names are equal
      - their infos on attributes, constructors, operations and notifications are equal
      This ensures that this `equals` method works properly for `obj` parameters which are different implementations of the `OpenMBeanInfo` interface.
      Specified by:
        `equals` in interface `OpenMBeanInfo`
      Overrides:
        `equals` in class `MBeanInfo`
      Parameters:
        `obj` - the object to be compared for equality with this `OpenMBeanInfoSupport` instance;
      Returns:
        `true` if the specified object is equal to this `OpenMBeanInfoSupport` instance.
      See Also:
        `Object.hashCode()`, `HashMap`

    - #### hashCode

          public int hashCode()

      Returns the hash code value for this `OpenMBeanInfoSupport` instance.

      The hash code of an `OpenMBeanInfoSupport` instance is the sum of the hash codes of all elements of information used in `equals` comparisons (ie: its class name, and its infos on attributes, constructors, operations and notifications, where the hashCode of each of these arrays is calculated by a call to `new java.util.HashSet(java.util.Arrays.asList(this.getSignature)).hashCode()`).

      This ensures that `t1.equals(t2)` implies that `t1.hashCode()==t2.hashCode()` for any two `OpenMBeanInfoSupport` instances `t1` and `t2`, as required by the general contract of the method `Object.hashCode()`.

      However, note that another instance of a class implementing the `OpenMBeanInfo` interface may be equal to this `OpenMBeanInfoSupport` instance as defined by `equals(java.lang.Object)`, but may have a different hash code if it is calculated differently.

      As `OpenMBeanInfoSupport` instances are immutable, the hash code for this instance is calculated once, on the first call to `hashCode`, and then the same value is returned for subsequent calls.

      Specified by:
        `hashCode` in interface `OpenMBeanInfo`
      Overrides:
        `hashCode` in class `MBeanInfo`
      Returns:
        the hash code value for this `OpenMBeanInfoSupport` instance
      See Also:
        `Object.equals(java.lang.Object)`, `System.identityHashCode(java.lang.Object)`

    - #### toString

          public String toString()

      Returns a string representation of this `OpenMBeanInfoSupport` instance.

      The string representation consists of the name of this class (ie `javax.management.openmbean.OpenMBeanInfoSupport`), the MBean class name, the string representation of infos on attributes, constructors, operations and notifications of the described MBean and the string representation of the descriptor.

      As `OpenMBeanInfoSupport` instances are immutable, the string representation for this instance is calculated once, on the first call to `toString`, and then the same value is returned for subsequent calls.

      Specified by:
        `toString` in interface `OpenMBeanInfo`
      Overrides:
        `toString` in class `MBeanInfo`
      Returns:
        a string representation of this `OpenMBeanInfoSupport` instance

Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
Copyright © 1993, 2026, Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.