Workspace/Siman-Common/src/org/splat/util/DTOTransformer.java

   1 /*****************************************************************************
   2  * Company         OPEN CASCADE
   3  * Application     SIMAN
   4  * File            $Id$
   5  * Creation date   05.10.2012
   6  * @author         $Author$
   7  * @version        $Revision$
   8  *****************************************************************************/
   9
  10 package org.splat.util;
  11
  12 import java.util.Map;
  13
  14 import net.sf.beanlib.PropertyInfo;
  15 import net.sf.beanlib.spi.BeanTransformerSpi;
  16 import net.sf.beanlib.spi.CustomBeanTransformerSpi;
  17
  18 import org.splat.log.AppLogger;
  19
  20 /**
  21  * DTO transformer used by BeanHelper.
  22  *
  23  * @author <a href="mailto:roman.kozlov@opencascade.com">Roman Kozlov (RKV)</a>
  24  */
  25 public class DTOTransformer implements CustomBeanTransformerSpi {
  26
  27         /**
  28          * The logger for the service.
  29          */
  30         public final static AppLogger LOG = AppLogger
  31                         .getLogger(DTOTransformer.class);
  32
  33         /**
  34          * the bean transformer.
  35          */
  36         private final transient BeanTransformerSpi _beanTransformer;
  37
  38         /**
  39          * Constructor.
  40          *
  41          * @param beanTransformer
  42          *            the bean transformer
  43          */
  44         public DTOTransformer(final BeanTransformerSpi beanTransformer) {
  45                 _beanTransformer = beanTransformer;
  46         }
  47
  48         /**
  49          *
  50          * {@inheritDoc}
  51          *
  52          * @see net.sf.beanlib.spi.CustomBeanTransformerSpi#isTransformable(java.lang.Object, java.lang.Class, net.sf.beanlib.PropertyInfo)
  53          */
  54         public <T> boolean isTransformable(final Object from,
  55                         final Class<T> toClass, final net.sf.beanlib.PropertyInfo info) {
  56                 boolean ok = false;
  57                 if (from == null) {
  58                         if (LOG.isDebugEnabled()) {
  59                                 LOG.debug("From: null; To: " + toClass.getSimpleName());
  60                         }
  61                 } else {
  62                         String fromName = from.getClass().getSimpleName();
  63                         String toName = toClass.getSimpleName();
  64                         if (LOG.isDebugEnabled()) {
  65                                 LOG.debug("From: " + fromName + "; To: " + toName);
  66                                 ok = (fromName.equals(toName + "DTO") || toName.equals(fromName
  67                                                 + "DTO"));
  68                         }
  69                 }
  70                 if (LOG.isDebugEnabled()) {
  71                         LOG.debug("Can transform from " + info.getFromBean() + "."
  72                                         + info.getPropertyName() + " to " + info.getToBean() + "."
  73                                         + info.getPropertyName() + ": " + ok);
  74                 }
  75                 return ok;
  76         }
  77
  78         /**
  79          *
  80          * {@inheritDoc}
  81          *
  82          * @see net.sf.beanlib.spi.Transformable#transform(java.lang.Object, java.lang.Class, net.sf.beanlib.PropertyInfo)
  83          */
  84         @SuppressWarnings("unchecked")
  85         public <T> T transform(final Object in, final Class<T> toClass,
  86                         final PropertyInfo info) {
  87                 if (LOG.isDebugEnabled()) {
  88                         LOG.debug("Transform " + in.getClass().getSimpleName() + ": "
  89                                         + in.toString() + " to " + toClass.getSimpleName());
  90                 }
  91                 Map<Object, Object> cloneMap = _beanTransformer.getClonedMap();
  92                 Object clone = cloneMap.get(in);
  93
  94                 if (clone == null) {
  95                         if (LOG.isDebugEnabled()) {
  96                                 LOG.debug("Copy bean from " + info.getFromBean() + "."
  97                                                 + info.getPropertyName() + " to " + info.getToBean() + "."
  98                                                 + info.getPropertyName());
  99                         }
 100                         clone = BeanHelper.copyBean(in, toClass);
 101                         cloneMap.put(in, clone);
 102                 }
 103                 return (T) clone;
 104         }
 105 }