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Java Source Code / Java Documentation » EJB Server JBoss 4.2.1 » jmx » javax.management

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Class Diagram

Java Document (Java Doc)

javax.management .Descriptor

All known Subclasses:   javax.management.modelmbean .DescriptorSupport,
Descriptor
public interface Descriptor extends Serializable,Cloneable(Code)
This interface defines behavioral and runtime metadata for ModelMBeans. A descriptor is a set of name-value pairs.
The DescriptorAccess interface defines how to get and set Descriptors for a ModelMBean's metadata classes.
The implementation must implement the following constructors.
Descriptor() returns an empty descriptor.
Descriptor(Descriptor) returns a copy of the decriptor.
Descriptor(String[], Object[]) a constructor that verifies the field names include a descriptorType and that predefined fields contain valid values.

See Also:   javax.management.DescriptorAccess
See Also:   javax.management.modelmbean.ModelMBean
author:
   Adrian Brock.
version:
   $Revision: 57200 $

Method Summary
public java.lang.Object clone()
     Returns a descriptor that is a duplicate of this one.
public String[] getFieldNames()
     Retrieves all the field names in this descriptor.
public Object getFieldValue(String fieldName)
     Retrieves the value of a field.
Parameters:
  fieldName - the name of the field.
public Object[] getFieldValues(String[] fieldNames)
     Retrieves all the field values for the passed field names.
public String[] getFields()
     Retrieves all the fields in this descriptor.
public boolean isValid()
     Checks to see that this descriptor is valid.
public void removeField(String fieldName)
     Remove a field from the descriptor.
Parameters:
  fieldName - the field to remove.
public void setField(String fieldName, Object fieldValue)
     Sets the value of a field.
public void setFields(String[] fieldNames, Object[] fieldValues)
     Set multiple fields in this descriptor.

Method Detail
clone
public java.lang.Object clone() throws RuntimeOperationsException(Code)
Returns a descriptor that is a duplicate of this one.
exception:
  RuntimeOperationsException - for invalid fieldNames,fieldValues or the contructor fails for any reason.

getFieldNames
public String[] getFieldNames()(Code)
Retrieves all the field names in this descriptor. an array of field name strings.

getFieldValue
public Object getFieldValue(String fieldName) throws RuntimeOperationsException(Code)
Retrieves the value of a field.
Parameters:
  fieldName - the name of the field. the value of the field.
exception:
  RuntimeOperationsException - when the field name is notvalid.

getFieldValues
public Object[] getFieldValues(String[] fieldNames)(Code)
Retrieves all the field values for the passed field names. The array of object values returned is in the same order as the field names passed to the method.
When a fieldName does not exist, the corresponding element of the returned array is null.

Parameters:
  fieldNames - the array of field names to retrieve. Pass nullto retrieve all fields. an array of field values.

getFields
public String[] getFields()(Code)
Retrieves all the fields in this descriptor. The format is fieldName=fieldValue for String values and fieldName=(fieldValue.toString()) for other value types.
an array of fieldName=fieldValue strings.

isValid
public boolean isValid() throws RuntimeOperationsException(Code)
Checks to see that this descriptor is valid. true when the fieldValues are legal for the fieldNames,false otherwise.
exception:
  RuntimeOperationsException - for any error performingthe validation.

removeField
public void removeField(String fieldName)(Code)
Remove a field from the descriptor.
Parameters:
  fieldName - the field to remove. No exception is thrownwhen the field is not in the descriptor.

setField
public void setField(String fieldName, Object fieldValue) throws RuntimeOperationsException(Code)
Sets the value of a field.
Parameters:
  fieldName - the name of the field.
Parameters:
  fieldValue - the value of the field.
exception:
  RuntimeOperationsException - when the field name or valueis not valid.

setFields
public void setFields(String[] fieldNames, Object[] fieldValues) throws RuntimeOperationsException(Code)
Set multiple fields in this descriptor. The field in the fieldNames array is set to the value of the corresponding fieldValues array. The two arrays must be the same size.
Parameters:
  fieldNames - an array of fieldNames to set. Neither the arrayor array elements can be null. The fieldName must exist.
Parameters:
  fieldValues - an array of fieldValues to set. Neither the arrayor array elements can be null. The fieldValue must be valid forthe corresponding fieldName.
exception:
  RuntimeOperationsException - for not existent or fieldNames,invalid or null fieldValues, the two arrays are different sizes orthe contructor fails for any reason.

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