Package org.jboss.metatype.plugins.values.mappers

Source Code of org.jboss.metatype.plugins.values.mappers.PropertiesObjectNameMetaMapper

/*
* JBoss, Home of Professional Open Source
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.metatype.plugins.values.mappers;

import java.lang.reflect.Type;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

import javax.management.ObjectName;

import org.jboss.metatype.api.types.MetaType;
import org.jboss.metatype.api.types.PropertiesMetaType;
import org.jboss.metatype.api.values.MetaValue;
import org.jboss.metatype.api.values.PropertiesMetaValue;
import org.jboss.metatype.spi.values.MetaMapper;

/**
* An ObjectName MetaMapper that maps to a PropertiesMetaType/PropertiesMetaValue
* @author Scott.Stark@jboss.org
* @version $Revision: 81575 $
*/
public class PropertiesObjectNameMetaMapper extends MetaMapper<ObjectName>
{
   PropertiesMetaType type;

   public PropertiesObjectNameMetaMapper()
   {
      this((String[])null);
   }
   public PropertiesObjectNameMetaMapper(String... args)
   {
      Map<String, String> propertyNameDescriptions = Collections.emptyMap();
      if(args != null)
      {
         if(((args.length %2) == 0) == false)
            throw new IllegalStateException("args counts must be 2*n for n key,key-description pairs");
         propertyNameDescriptions = new HashMap<String,String>();
         propertyNameDescriptions.put("domain", "the object name domain");
         for(int n = 0; n < args.length; n += 2)
         {
            String key = args[n];
            String description = args[n+1];
            propertyNameDescriptions.put(key, description);
         }
      }

      type = new PropertiesMetaType("java.util.Properties", propertyNameDescriptions);
   }

   @Override
   public MetaType getMetaType()
   {
      return type;
   }

   @Override
   public Type mapToType()
   {
      return ObjectName.class;
   }

   @Override
   public MetaValue createMetaValue(MetaType metaType, ObjectName object)
   {
      String domain = object.getDomain();
      Map<String, String> props = object.getKeyPropertyList();
      PropertiesMetaValue map = PropertiesMetaValue.wrap(props);
      map.put("domain", domain);
      return map;
   }

   @Override
   public ObjectName unwrapMetaValue(MetaValue metaValue)
   {
      PropertiesMetaValue map = (PropertiesMetaValue) metaValue;
      String domain = (String) map.remove("domain");

      try
      {
         ObjectName name = new ObjectName(domain, map);
         return name;
      }
      catch(Exception e)
      {
         throw new IllegalArgumentException("Failed to build ObjectName from MetaValue: "+metaValue, e);
      }
   }

}
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