java.lang.Object
javax.management.AttributeValueExp
- All Implemented Interfaces:
- Serializable,- ValueExp
Represents attributes used as arguments to relational constraints.
 Instances of this class are usually obtained using Query.attr.
An AttributeValueExp may be used anywhere a
 ValueExp is required.
- Since:
- 1.5
- See Also:
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Constructor SummaryConstructorsConstructorDescriptionDeprecated.An instance created with this constructor cannot be used in a query.AttributeValueExp(String attr) Creates a newAttributeValueExprepresenting the specified object attribute, named attr.
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Method SummaryModifier and TypeMethodDescriptionapply(ObjectName name) Applies theAttributeValueExpon an MBean.protected ObjectgetAttribute(ObjectName name) Return the value of the given attribute in the named MBean.Returns a string representation of the name of the attribute.voidDeprecated.This method has no effect.toString()Returns the string representing its value.
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Constructor Details- 
AttributeValueExpDeprecated.An instance created with this constructor cannot be used in a query.AnAttributeValueExpwith a null attribute.
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AttributeValueExpCreates a newAttributeValueExprepresenting the specified object attribute, named attr.- Parameters:
- attr- the name of the attribute whose value is the value of this- ValueExp.
 
 
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Method Details- 
getAttributeNameReturns a string representation of the name of the attribute.- Returns:
- the attribute name.
 
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applypublic ValueExp apply(ObjectName name) throws BadStringOperationException, BadBinaryOpValueExpException, BadAttributeValueExpException, InvalidApplicationException Applies the AttributeValueExpon an MBean. This method callsgetAttribute(name)and wraps the result as aValueExp. The value returned bygetAttributemust be aNumber,String, orBoolean; otherwise this method throws aBadAttributeValueExpException, which will cause the containing query to be false for thisname.- Specified by:
- applyin interface- ValueExp
- Parameters:
- name- The name of the MBean on which the- AttributeValueExpwill be applied.
- Returns:
- The ValueExp.
- Throws:
- BadStringOperationException- when an invalid string operation is passed to a method for constructing a query
- BadBinaryOpValueExpException- when an invalid expression is passed to a method for constructing a query
- BadAttributeValueExpException- when an invalid MBean attribute is passed to a query constructing method
- InvalidApplicationException- when an invalid apply is attempted
 
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toStringReturns the string representing its value.
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setMBeanServerDeprecated.This method has no effect. The MBean Server used to obtain an attribute value isQueryEval.getMBeanServer().Sets the MBean server on which the query is to be performed.- Specified by:
- setMBeanServerin interface- ValueExp
- Parameters:
- s- The MBean server on which the query is to be performed.
 
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getAttributeReturn the value of the given attribute in the named MBean. If the attempt to access the attribute generates an exception, return null. The MBean Server used is the one returned by QueryEval.getMBeanServer().- Parameters:
- name- the name of the MBean whose attribute is to be returned.
- Returns:
- the value of the attribute, or null if it could not be obtained.
 
 
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