| java.lang.Object | |
| ↳ | javax.management.AttributeValueExp |
Class Overview
Represents attributes used as arguments to relational constraints.
An AttributeValueExp may be used anywhere a ValueExp is required.
Summary
| Public Constructors | |||||||||||
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This constructor is deprecated.
An instance created with this constructor cannot be
used in a query.
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Creates a new
AttributeValueExp representing the
specified object attribute, named attr. | |||||||||||
| Public Methods | |||||||||||
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Applies the
AttributeValueExp on an MBean. | |||||||||||
Returns a string representation of the name of the attribute.
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Sets the MBean server on which the query is to be performed.
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Returns the string representing its value.
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| Protected Methods | |||||||||||
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Return the value of the given attribute in the named MBean.
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Inherited Methods | |||||||||||
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From class
java.lang.Object
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From interface
javax.management.ValueExp
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Public Constructors
public AttributeValueExp ()
This constructor is deprecated.
An instance created with this constructor cannot be
used in a query.
An AttributeValueExp with a null attribute.
public AttributeValueExp (String attr)
Creates a new AttributeValueExp representing 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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Public Methods
public ValueExp apply (ObjectName name)
Applies the AttributeValueExp on an MBean.
Parameters
| name | The name of the MBean on which the AttributeValueExp will be applied. |
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Returns
- The
ValueExp.
Throws
| BadAttributeValueExpException | |
| InvalidApplicationException | |
| BadStringOperationException | |
| BadBinaryOpValueExpException | |
| BadAttributeValueExpException | |
| BadStringOperationException | |
| InvalidApplicationException |
public String getAttributeName ()
Returns a string representation of the name of the attribute.
Returns
- the attribute name.
public void setMBeanServer (MBeanServer s)
Sets the MBean server on which the query is to be performed.
Parameters
| s | The MBean server on which the query is to be performed. |
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public String toString ()
Returns the string representing its value.
Returns
- a string representation of the object.
Protected Methods
protected Object getAttribute (ObjectName name)
Return the value of the given attribute in the named MBean. If the attempt to access the attribute generates an exception, return null.
Parameters
| name | the name of the MBean whose attribute is to be returned. |
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Returns
- the value of the attribute, or null if it could not be obtained.