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javax.management

Class AttributeValueExp

Implemented Interfaces:
Serializable, ValueExp
public class AttributeValueExp
extends Object
implements ValueExp
Represents an attribute value being used as an argument to a relational constraint.
Since:
1.5

Constructor Summary

AttributeValueExp(String attr)
Constructs a new AttributeValueExp using the specified attribute.

Method Summary

ValueExp
apply(ObjectName name)
Applies the AttributeValueExp to the specified management bean by obtaining the attribute value from the MBeanServer and using it to create a StringValueExp.
protected Object
getAttribute(ObjectName name)
Returns the value of the attribute by calling the MBeanServer.getAttribute(ObjectName) method of the server returned by QueryEval.getMBeanServer().
String
getAttributeName()
Returns the attribute name.
void
setMBeanServer(MBeanServer server)
Sets the MBeanServer on which the query will be performed.
String
toString()
Returns the attribute name, quoted.

Methods inherited from class java.lang.Object

clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

AttributeValueExp

public AttributeValueExp(String attr)
Constructs a new AttributeValueExp using the specified attribute.
Parameters:
attr - the name of the attribute whose value will be used for this expression.

Method Details

apply

public ValueExp apply(ObjectName name)
            throws BadStringOperationException,
                   BadBinaryOpValueExpException,
                   BadAttributeValueExpException,
                   InvalidApplicationException
Applies the AttributeValueExp to the specified management bean by obtaining the attribute value from the MBeanServer and using it to create a StringValueExp.
Specified by:
apply in interface ValueExp
Parameters:
name - the ObjectName of the bean to obtain the value from.
Returns:
a StringValueExp containing the result.
Throws:
BadStringOperationException - if an invalid string operation is used by the value expression.
BadBinaryOpValueExpException - if an invalid expression is used by the value expression.
BadAttributeValueExpException - if an invalid attribute is used by the value expression.
InvalidApplicationException - if the value expression is applied to the wrong type of bean.

getAttribute

protected Object getAttribute(ObjectName name)
Returns the value of the attribute by calling the MBeanServer.getAttribute(ObjectName) method of the server returned by QueryEval.getMBeanServer(). If an exception occurs, null is returned.
Parameters:
name - the ObjectName of the bean to obtain the value from.
Returns:
a StringValueExp containing the result.

getAttributeName

public String getAttributeName()
Returns the attribute name.
Returns:
the attribute name.

setMBeanServer

public void setMBeanServer(MBeanServer server)
Sets the MBeanServer on which the query will be performed.
Specified by:
setMBeanServer in interface ValueExp
Parameters:
server - the new server.

toString

public String toString()
Returns the attribute name, quoted.
Overrides:
toString in interface Object
Returns:
the quoted attribute name.
AttributeValueExp.java -- Represents attributes to be passed to queries. Copyright (C) 2007 Free Software Foundation, Inc. This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.

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