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## javax.management.openmbean
Class OpenMBeanOperationInfoSupport

    java.lang.Object
      javax.management.MBeanFeatureInfo
          javax.management.MBeanOperationInfo
              javax.management.openmbean.OpenMBeanOperationInfoSupport

All Implemented Interfaces:
  Serializable, Cloneable, DescriptorRead, OpenMBeanOperationInfo

    public class OpenMBeanOperationInfoSupport

extends MBeanOperationInfo
implements OpenMBeanOperationInfo

Describes an operation of an Open MBean.

Since:
  1.5
See Also:
  Serialized Form

Field Summary

Fields inherited from class javax.management.MBeanOperationInfo
`ACTION, ACTION_INFO, INFO, UNKNOWN`

Fields inherited from class javax.management.MBeanFeatureInfo
`description, name`

Constructor Summary
`OpenMBeanOperationInfoSupport(String name, String description, OpenMBeanParameterInfo[] signature, OpenType<?> returnOpenType, int impact)` Constructs an `OpenMBeanOperationInfoSupport` instance, which describes the operation of a class of open MBeans, with the specified `name`, `description`, `signature`, `returnOpenType` and `impact`.
`OpenMBeanOperationInfoSupport(String name, String description, OpenMBeanParameterInfo[] signature, OpenType<?> returnOpenType, int impact, Descriptor descriptor)` Constructs an `OpenMBeanOperationInfoSupport` instance, which describes the operation of a class of open MBeans, with the specified `name`, `description`, `signature`, `returnOpenType`, `impact`, and `descriptor`.

Method Summary
`boolean` | `equals(Object obj)` Compares the specified `obj` parameter with this `OpenMBeanOperationInfoSupport` instance for equality.
`OpenType<?>` | `getReturnOpenType()` Returns the open type of the values returned by the operation described by this `OpenMBeanOperationInfo` instance.
`int` | `hashCode()` Returns the hash code value for this `OpenMBeanOperationInfoSupport` instance.
`String` | `toString()` Returns a string representation of this `OpenMBeanOperationInfoSupport` instance.

Methods inherited from class javax.management.MBeanOperationInfo
`clone, getImpact, getReturnType, getSignature`

Methods inherited from class javax.management.MBeanFeatureInfo
`getDescription, getDescriptor, getName`

Methods inherited from class java.lang.Object
`finalize, getClass, notify, notifyAll, wait, wait, wait`

Methods inherited from interface javax.management.openmbean.OpenMBeanOperationInfo
`getDescription, getImpact, getName, getReturnType, getSignature`

Constructor Detail

### OpenMBeanOperationInfoSupport

    public OpenMBeanOperationInfoSupport(String name,
                                         String description,
                                         OpenMBeanParameterInfo[] signature,
                                         OpenType<?> returnOpenType,
                                         int impact)

  Constructs an `OpenMBeanOperationInfoSupport` instance, which describes the operation of a class of open MBeans, with the specified `name`, `description`, `signature`, `returnOpenType` and `impact`.

  The `signature` array parameter is internally copied, so that subsequent changes to the array referenced by `signature` have no effect on this instance.

  Parameters:
    `name` - cannot be a null or empty string.
    `description` - cannot be a null or empty string.
    `signature` - can be null or empty if there are no parameters to describe.
    `returnOpenType` - cannot be null: use `SimpleType.VOID` for operations that return nothing.
    `impact` - must be one of `ACTION`, `ACTION_INFO`, `INFO`, or `UNKNOWN`.
  Throws:
    `IllegalArgumentException` - if `name` or `description` are null or empty string, or `returnOpenType` is null, or `impact` is not one of `ACTION`, `ACTION_INFO`, `INFO`, or `UNKNOWN`.
    `ArrayStoreException` - If `signature` is not an array of instances of a subclass of `MBeanParameterInfo`.

### OpenMBeanOperationInfoSupport

    public OpenMBeanOperationInfoSupport(String name,
                                         String description,
                                         OpenMBeanParameterInfo[] signature,
                                         OpenType<?> returnOpenType,
                                         int impact,
                                         Descriptor descriptor)

  Constructs an `OpenMBeanOperationInfoSupport` instance, which describes the operation of a class of open MBeans, with the specified `name`, `description`, `signature`, `returnOpenType`, `impact`, and `descriptor`.

  The `signature` array parameter is internally copied, so that subsequent changes to the array referenced by `signature` have no effect on this instance.

  Parameters:
    `name` - cannot be a null or empty string.
    `description` - cannot be a null or empty string.
    `signature` - can be null or empty if there are no parameters to describe.
    `returnOpenType` - cannot be null: use `SimpleType.VOID` for operations that return nothing.
    `impact` - must be one of `ACTION`, `ACTION_INFO`, `INFO`, or `UNKNOWN`.
    `descriptor` - The descriptor for the operation. This may be null, which is equivalent to an empty descriptor.
  Throws:
    `IllegalArgumentException` - if `name` or `description` are null or empty string, or `returnOpenType` is null, or `impact` is not one of `ACTION`, `ACTION_INFO`, `INFO`, or `UNKNOWN`.
    `ArrayStoreException` - If `signature` is not an array of instances of a subclass of `MBeanParameterInfo`.
  Since:
    1.6

Method Detail

### getReturnOpenType

    public OpenType<?> getReturnOpenType()

  Returns the open type of the values returned by the operation described by this `OpenMBeanOperationInfo` instance.

  Specified by:
    `getReturnOpenType` in interface `OpenMBeanOperationInfo`
  Returns:
    the return type.

### equals

    public boolean equals(Object obj)

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

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

  - `obj` is non null,
  - `obj` also implements the `OpenMBeanOperationInfo` interface,
  - their names are equal
  - their signatures are equal
  - their return open types are equal
  - their impacts are equal
  This ensures that this `equals` method works properly for `obj` parameters which are different implementations of the `OpenMBeanOperationInfo` interface.

  Specified by:
    `equals` in interface `OpenMBeanOperationInfo`
  Overrides:
    `equals` in class `MBeanOperationInfo`
  Parameters:
    `obj` - the object to be compared for equality with this `OpenMBeanOperationInfoSupport` instance;
  Returns:
    `true` if the specified object is equal to this `OpenMBeanOperationInfoSupport` instance.
  See Also:
    `Object.hashCode()`, `Hashtable`

### hashCode

    public int hashCode()

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

  The hash code of an `OpenMBeanOperationInfoSupport` instance is the sum of the hash codes of all elements of information used in `equals` comparisons (ie: its name, return open type, impact and signature, where the signature hashCode is calculated by a call to `java.util.Arrays.asList(this.getSignature).hashCode()`).

  This ensures that `t1.equals(t2)` implies that `t1.hashCode()==t2.hashCode()` for any two `OpenMBeanOperationInfoSupport` 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 `OpenMBeanOperationInfo` interface may be equal to this `OpenMBeanOperationInfoSupport` instance as defined by `equals(java.lang.Object)`, but may have a different hash code if it is calculated differently.

  As `OpenMBeanOperationInfoSupport` 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 `OpenMBeanOperationInfo`
  Overrides:
    `hashCode` in class `MBeanOperationInfo`
  Returns:
    the hash code value for this `OpenMBeanOperationInfoSupport` instance
  See Also:
    `Object.equals(java.lang.Object)`, `Hashtable`

### toString

    public String toString()

  Returns a string representation of this `OpenMBeanOperationInfoSupport` instance.

  The string representation consists of the name of this class (ie `javax.management.openmbean.OpenMBeanOperationInfoSupport`), and the name, signature, return open type and impact of the described operation and the string representation of its descriptor.

  As `OpenMBeanOperationInfoSupport` 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 `OpenMBeanOperationInfo`
  Overrides:
    `toString` in class `MBeanOperationInfo`
  Returns:
    a string representation of this `OpenMBeanOperationInfoSupport` instance

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