javax.management.modelmbean
Class ModelMBeanAttributeInfo

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

All Implemented Interfaces:

Serializable, Cloneable, DescriptorAccess

public class ModelMBeanAttributeInfo
extends MBeanAttributeInfo
implements DescriptorAccess, Cloneable

The ModelMBeanAttributeInfo object describes an attribute of the ModelMBean. It is a subclass of MBeanAttributeInfo with the addition of an associated Descriptor and an implementation of the DescriptorAccess interface.

The fields in the descriptor are defined, but not limited to, the following:

 name           : attribute name  
 descriptorType : must be "attribute"   
 value          : current value for attribute 
 default        : default value for attribute 
 displayName    : name of attribute to be used in displays 
 getMethod      : name of operation descriptor for get method  
 setMethod      : name of operation descriptor for set method 
 protocolMap    : object which implements the Descriptor interface: mappings must be appropriate for the attribute
                  and entries can be updated or augmented at runtime.
 persistPolicy  : OnUpdate|OnTimer|NoMoreOftenThan|Always|Never  
 persistPeriod  : seconds - frequency of persist cycle. Used when persistPolicy is"OnTimer" or "NoMoreOftenThan".  
 currencyTimeLimit : how long value is valid, <0 never, =0 always, >0 seconds
 lastUpdatedTimeStamp : when value was set  
 visibility     : 1-4 where 1: always visible 4: rarely visible  
 presentationString : xml formatted string to allow presentation of data 
 

The default descriptor contains the name, descriptorType and displayName fields.

Note: because of inconsistencies in previous versions of this specification, it is recommended not to use negative or zero values for currencyTimeLimit. To indicate that a cached value is never valid, omit the currencyTimeLimit field. To indicate that it is always valid, use a very large number for this field.

Since:

1.5

See Also:

Serialized Form

Field Summary

Fields inherited from class javax.management.MBeanFeatureInfo

description, name

Constructor Summary

ModelMBeanAttributeInfo(ModelMBeanAttributeInfo inInfo)
Constructs a new ModelMBeanAttributeInfo object from this ModelMBeanAttributeInfo Object.

ModelMBeanAttributeInfo(String name, String description, Method getter, Method setter)
Constructs a ModelMBeanAttributeInfo object with a default descriptor.

ModelMBeanAttributeInfo(String name, String description, Method getter, Method setter, Descriptor descriptor)
Constructs a ModelMBeanAttributeInfo object.

ModelMBeanAttributeInfo(String name, String type, String description, boolean isReadable, boolean isWritable, boolean isIs)
Constructs a ModelMBeanAttributeInfo object with a default descriptor.

ModelMBeanAttributeInfo(String name, String type, String description, boolean isReadable, boolean isWritable, boolean isIs, Descriptor descriptor)
Constructs a ModelMBeanAttributeInfo object with a default descriptor.

Method Summary

Object	clone() Creates and returns a new ModelMBeanAttributeInfo which is a duplicate of this ModelMBeanAttributeInfo.
Descriptor	getDescriptor() Gets a copy of the associated Descriptor for the ModelMBeanAttributeInfo.
void	setDescriptor(Descriptor inDescriptor) Sets associated Descriptor (full replace) for the ModelMBeanAttributeDescriptor.
String	toString() Returns a human-readable version of the ModelMBeanAttributeInfo instance.

Methods inherited from class javax.management.MBeanAttributeInfo

equals, getType, hashCode, isIs, isReadable, isWritable

Methods inherited from class javax.management.MBeanFeatureInfo

getDescription, getName

Methods inherited from class java.lang.Object

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

Constructor Detail

ModelMBeanAttributeInfo

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

Constructs a ModelMBeanAttributeInfo object with a default descriptor.

Parameters:

name - The name of the attribute.

description - A human readable description of the attribute. Optional.

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.

ModelMBeanAttributeInfo

public ModelMBeanAttributeInfo(String name,
                               String description,
                               Method getter,
                               Method setter,
                               Descriptor descriptor)
                        throws IntrospectionException

Constructs a ModelMBeanAttributeInfo object.

Parameters:

name - The name of the attribute.

description - A human readable description of the attribute. Optional.

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.

descriptor - An instance of Descriptor containing the appropriate metadata for this instance of the Attribute. If it is null, then a default descriptor will be created. If the descriptor does not contain the field "displayName" this field is added in the descriptor with its default value.

Throws:

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

RuntimeOperationsException - Wraps an IllegalArgumentException. The descriptor is invalid, or descriptor field "name" is not equal to name parameter, or descriptor field "DescriptorType" is not equal to "attribute".

ModelMBeanAttributeInfo

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

Constructs a ModelMBeanAttributeInfo object with a default descriptor.

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 the attribute has an "is" getter, false otherwise.

ModelMBeanAttributeInfo

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

Constructs a ModelMBeanAttributeInfo object with a default descriptor.

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 the attribute has an "is" getter, false otherwise.

descriptor - An instance of Descriptor containing the appropriate metadata for this instance of the Attribute. If it is null then a default descriptor will be created. If the descriptor does not contain the field "displayName" this field is added in the descriptor with its default value.

Throws:

RuntimeOperationsException - Wraps an IllegalArgumentException. The descriptor is invalid, or descriptor field "name" is not equal to name parameter, or descriptor field "DescriptorType" is not equal to "attribute".

ModelMBeanAttributeInfo

public ModelMBeanAttributeInfo(ModelMBeanAttributeInfo inInfo)

Constructs a new ModelMBeanAttributeInfo object from this ModelMBeanAttributeInfo Object. A default descriptor will be created.

Parameters:

inInfo - the ModelMBeanAttributeInfo to be duplicated

Method Detail

getDescriptor

public Descriptor getDescriptor()

Gets a copy of the associated Descriptor for the ModelMBeanAttributeInfo.

Specified by:

getDescriptor in interface DescriptorAccess

Returns:

Descriptor associated with the ModelMBeanAttributeInfo object.

See Also:

setDescriptor(javax.management.Descriptor)

setDescriptor

public void setDescriptor(Descriptor inDescriptor)

Sets associated Descriptor (full replace) for the ModelMBeanAttributeDescriptor. If the new Descriptor is null, then the associated Descriptor reverts to a default descriptor. The Descriptor is validated before it is assigned. If the new Descriptor is invalid, then a RuntimeOperationsException wrapping an IllegalArgumentException is thrown.

Specified by:

setDescriptor in interface DescriptorAccess

Parameters:

inDescriptor - replaces the Descriptor associated with the ModelMBeanAttributeInfo

Throws:

RuntimeOperationsException - Wraps an IllegalArgumentException for an invalid Descriptor

See Also:

getDescriptor()

clone

public Object clone()

Creates and returns a new ModelMBeanAttributeInfo which is a duplicate of this ModelMBeanAttributeInfo.

Overrides:

clone in class MBeanAttributeInfo

Returns:

a clone of this instance.

Throws:

RuntimeOperationsException - for illegal value for field Names or field Values. If the descriptor construction fails for any reason, this exception will be thrown.

See Also:

Cloneable

toString

public String toString()

Returns a human-readable version of the ModelMBeanAttributeInfo instance.

Overrides:

toString in class Object

Returns:

a string representation of the object.