OpenMBeanParameterInfo (Java SE 11 & JDK 11 )
Keywords: javax.management.openmbean.OpenMBeanParameterInfo interface

Module java.management
Package javax.management.openmbean

## Interface OpenMBeanParameterInfo

- All Known Subinterfaces:
    `OpenMBeanAttributeInfo`
  All Known Implementing Classes:
    `OpenMBeanAttributeInfoSupport`, `OpenMBeanParameterInfoSupport`

      public interface OpenMBeanParameterInfo

  Describes a parameter used in one or more operations or constructors of an open MBean.

  This interface declares the same methods as the class `MBeanParameterInfo`. A class implementing this interface (typically `OpenMBeanParameterInfoSupport`) should extend `MBeanParameterInfo`.

  Since:
    1.5

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `boolean` | `equals​(Object obj)` | Compares the specified obj parameter with this `OpenMBeanParameterInfo` instance for equality.
    `Object` | `getDefaultValue()` | Returns the default value for this parameter, if it has one, or `null` otherwise.
    `String` | `getDescription()` | Returns a human readable description of the parameter described by this `OpenMBeanParameterInfo` instance.
    `Set<?>` | `getLegalValues()` | Returns the set of legal values for this parameter, if it has one, or `null` otherwise.
    `Comparable<?>` | `getMaxValue()` | Returns the maximal value for this parameter, if it has one, or `null` otherwise.
    `Comparable<?>` | `getMinValue()` | Returns the minimal value for this parameter, if it has one, or `null` otherwise.
    `String` | `getName()` | Returns the name of the parameter described by this `OpenMBeanParameterInfo` instance.
    `OpenType<?>` | `getOpenType()` | Returns the open type of the values of the parameter described by this `OpenMBeanParameterInfo` instance.
    `boolean` | `hasDefaultValue()` | Returns `true` if this parameter has a specified default value, or `false` otherwise.
    `int` | `hashCode()` | Returns the hash code value for this `OpenMBeanParameterInfo` instance.
    `boolean` | `hasLegalValues()` | Returns `true` if this parameter has a specified set of legal values, or `false` otherwise.
    `boolean` | `hasMaxValue()` | Returns `true` if this parameter has a specified maximal value, or `false` otherwise.
    `boolean` | `hasMinValue()` | Returns `true` if this parameter has a specified minimal value, or `false` otherwise.
    `boolean` | `isValue​(Object obj)` | Tests whether obj is a valid value for the parameter described by this `OpenMBeanParameterInfo` instance.
    `String` | `toString()` | Returns a string representation of this `OpenMBeanParameterInfo` instance.

- - ### Method Detail

    - #### getDescription

          String getDescription()

      Returns a human readable description of the parameter described by this `OpenMBeanParameterInfo` instance.
      Returns:
        the description.

    - #### getName

          String getName()

      Returns the name of the parameter described by this `OpenMBeanParameterInfo` instance.
      Returns:
        the name.

    - #### getOpenType

          OpenType<?> getOpenType()

      Returns the open type of the values of the parameter described by this `OpenMBeanParameterInfo` instance.
      Returns:
        the open type.

    - #### getDefaultValue

          Object getDefaultValue()

      Returns the default value for this parameter, if it has one, or `null` otherwise.
      Returns:
        the default value.

    - #### getLegalValues

          Set<?> getLegalValues()

      Returns the set of legal values for this parameter, if it has one, or `null` otherwise.
      Returns:
        the set of legal values.

    - #### getMinValue

          Comparable<?> getMinValue()

      Returns the minimal value for this parameter, if it has one, or `null` otherwise.
      Returns:
        the minimum value.

    - #### getMaxValue

          Comparable<?> getMaxValue()

      Returns the maximal value for this parameter, if it has one, or `null` otherwise.
      Returns:
        the maximum value.

    - #### hasDefaultValue

          boolean hasDefaultValue()

      Returns `true` if this parameter has a specified default value, or `false` otherwise.
      Returns:
        true if there is a default value.

    - #### hasLegalValues

          boolean hasLegalValues()

      Returns `true` if this parameter has a specified set of legal values, or `false` otherwise.
      Returns:
        true if there is a set of legal values.

    - #### hasMinValue

          boolean hasMinValue()

      Returns `true` if this parameter has a specified minimal value, or `false` otherwise.
      Returns:
        true if there is a minimum value.

    - #### hasMaxValue

          boolean hasMaxValue()

      Returns `true` if this parameter has a specified maximal value, or `false` otherwise.
      Returns:
        true if there is a maximum value.

    - #### isValue

          boolean isValue​(Object obj)

      Tests whether obj is a valid value for the parameter described by this `OpenMBeanParameterInfo` instance.
      Parameters:
        `obj` - the object to be tested.
      Returns:
        `true` if obj is a valid value for the parameter described by this `OpenMBeanParameterInfo` instance, `false` otherwise.

    - #### equals

          boolean equals​(Object obj)

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

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

      - obj is non null,
      - obj also implements the `OpenMBeanParameterInfo` interface,
      - their names are equal
      - their open types are equal
      - their default, min, max and legal values are equal.
      This ensures that this `equals` method works properly for obj parameters which are different implementations of the `OpenMBeanParameterInfo` interface.
      Overrides:
        `equals` in class `Object`
      Parameters:
        `obj` - the object to be compared for equality with this `OpenMBeanParameterInfo` instance;
      Returns:
        `true` if the specified object is equal to this `OpenMBeanParameterInfo` instance.
      See Also:
        `Object.hashCode()`, `HashMap`

    - #### hashCode

          int hashCode()

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

      The hash code of an `OpenMBeanParameterInfo` instance is the sum of the hash codes of all elements of information used in `equals` comparisons (ie: its name, its open type, and its default, min, max and legal values).

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

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

    - #### toString

          String toString()

      Returns a string representation of this `OpenMBeanParameterInfo` instance.

      The string representation consists of the name of this class (ie `javax.management.openmbean.OpenMBeanParameterInfo`), the string representation of the name and open type of the described parameter, and the string representation of its default, min, max and legal values.

      Overrides:
        `toString` in class `Object`
      Returns:
        a string representation of this `OpenMBeanParameterInfo` instance