001    /* StringValueExp.java -- Represents strings to be passed to queries.
002       Copyright (C) 2007 Free Software Foundation, Inc.
003    
004    This file is part of GNU Classpath.
005    
006    GNU Classpath is free software; you can redistribute it and/or modify
007    it under the terms of the GNU General Public License as published by
008    the Free Software Foundation; either version 2, or (at your option)
009    any later version.
010    
011    GNU Classpath is distributed in the hope that it will be useful, but
012    WITHOUT ANY WARRANTY; without even the implied warranty of
013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014    General Public License for more details.
015    
016    You should have received a copy of the GNU General Public License
017    along with GNU Classpath; see the file COPYING.  If not, write to the
018    Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019    02110-1301 USA.
020    
021    Linking this library statically or dynamically with other modules is
022    making a combined work based on this library.  Thus, the terms and
023    conditions of the GNU General Public License cover the whole
024    combination.
025    
026    As a special exception, the copyright holders of this library give you
027    permission to link this library with independent modules to produce an
028    executable, regardless of the license terms of these independent
029    modules, and to copy and distribute the resulting executable under
030    terms of your choice, provided that you also meet, for each linked
031    independent module, the terms and conditions of the license of that
032    module.  An independent module is a module which is not derived from
033    or based on this library.  If you modify this library, you may extend
034    this exception to your version of the library, but you are not
035    obligated to do so.  If you do not wish to do so, delete this
036    exception statement from your version. */
037    
038    package javax.management;
039    
040    /**
041     * Represents a string being used as an argument
042     * to a relational constraint.
043     *
044     * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
045     * @since 1.5
046     */
047    public class StringValueExp
048      implements ValueExp
049    {
050    
051      /**
052       * Compatible with JDK 1.5
053       */
054      private static final long serialVersionUID = -3256390509806284044L;
055    
056      /**
057       * The string value.
058       */
059      private String val;
060    
061      /**
062       * Constructs a new {@link StringValueExp}.
063       */
064      public StringValueExp()
065      {
066      }
067    
068      /**
069       * Constructs a new {@link StringValueExp} using the
070       * specified value.
071       *
072       * @param val the string value used for this expression.
073       */
074      public StringValueExp(String val)
075      {
076        this.val = val;
077      }
078    
079      /**
080       * Applies the {@link StringValueExp} to the specified
081       * management bean by simply returning the value.
082       *
083       * @param name the {@link ObjectName} of the bean.
084       * @return the {@link StringValueExp} itself.
085       * @throws BadStringOperationException if an invalid string
086       *                                     operation is used by
087       *                                     the value expression.
088       * @throws BadBinaryOpValueExpException if an invalid expression
089       *                                      is used by the value expression.
090       * @throws BadAttributeValueExpException if an invalid attribute
091       *                                       is used by the value expression.
092       * @throws InvalidApplicationException if the value expression is applied
093       *                                     to the wrong type of bean.
094       */
095      public ValueExp apply(ObjectName name)
096        throws BadStringOperationException, BadBinaryOpValueExpException,
097               BadAttributeValueExpException, InvalidApplicationException
098      {
099        return this;
100      }
101    
102      /**
103       * Returns the value.
104       *
105       * @return the value.
106       */
107      public String getValue()
108      {
109        return val;
110      }
111    
112      /**
113       * Sets the {@link MBeanServer} on which the query
114       * will be performed.
115       *
116       * @param server the new server.
117       */
118      public void setMBeanServer(MBeanServer server)
119      {
120        /* This seems to do nothing any more */
121      }
122    
123      /**
124       * Returns the value in quotes.
125       *
126       * @return the value (quoted).
127       */
128      public String toString()
129      {
130        return "'" + val + "'";
131      }
132    
133    }