cdmlib-remote/src/main/java/eu/etaxonomy/cdm/remote/dto/assembler/converter/HibernateProxyNullSafeDeepConverter.java

   1 // $Id$
   2 /**
   3 * Copyright (C) 2007 EDIT
   4 * European Distributed Institute of Taxonomy
   5 * http://www.e-taxonomy.eu
   6 *
   7 * The contents of this file are subject to the Mozilla Public License Version 1.1
   8 * See LICENSE.TXT at the top of this package for the full license terms.
   9 */
  10 package eu.etaxonomy.cdm.remote.dto.assembler.converter;
  11
  12 import java.beans.PropertyDescriptor;
  13 import java.lang.reflect.InvocationTargetException;
  14 import java.lang.reflect.Method;
  15 import java.util.Arrays;
  16 import java.util.Iterator;
  17 import java.util.List;
  18
  19 import org.dozer.ConfigurableCustomConverter;
  20 import org.dozer.Mapper;
  21 import org.dozer.MappingException;
  22 import org.hibernate.Hibernate;
  23 import org.springframework.beans.BeanUtils;
  24 import org.springframework.beans.BeansException;
  25 import org.springframework.context.ApplicationContext;
  26 import org.springframework.context.ApplicationContextAware;
  27
  28 import eu.etaxonomy.cdm.model.common.CdmBase;
  29
  30 public class HibernateProxyNullSafeDeepConverter implements ConfigurableCustomConverter, ApplicationContextAware {
  31
  32         private Mapper mapper;
  33
  34         private ApplicationContext applicationContext;
  35
  36         String parameter = null;
  37
  38         private List<String> parameterList;
  39
  40         /* (non-Javadoc)
  41          * @see org.dozer.ConfigurableCustomConverter#setParameter(java.lang.String)
  42          */
  43         @Override
  44         public void setParameter(String parameter) {
  45                 this.parameter = parameter;
  46                 if(parameter.indexOf('.') > -1){
  47                         this.parameterList = Arrays.asList(parameter.split("."));
  48                 } else {
  49                         this.parameterList = Arrays.asList(new String[]{parameter});
  50                 }
  51         }
  52
  53
  54         protected Mapper getMapper() {
  55                 if(mapper == null) {
  56                         this.setMapper((Mapper)this.applicationContext.getBean("dozerMapper", Mapper.class));
  57                 }
  58                 return mapper;
  59         }
  60
  61         public void setMapper(Mapper mapper) {
  62                 this.mapper = mapper;
  63         }
  64
  65         public Object convert(Object destination, Object source, Class<?> destClass, Class<?> sourceClass) {
  66                 if (source == null || !Hibernate.isInitialized(source)) {
  67                     return null;
  68             } else {
  69
  70                 try {
  71                         Object value = invokeProperty(source, sourceClass, parameterList.iterator());
  72                         if(value == null || !Hibernate.isInitialized(value)) {
  73                                 return null;
  74                         } else {
  75                                 if(value instanceof CdmBase) {
  76                                         return getMapper().map(value, destClass);
  77                                 } else {
  78                                         return value;
  79                                 }
  80                         }
  81                         } catch (Exception e) {
  82                                 throw new MappingException("Converter HibernateProxyNullSafeDeepConverter used incorrectly. Arguments passed in were:"+ destination + " and " + source + " sourceClass " + sourceClass + " destClass " + destClass, e);
  83                         }
  84
  85                 }
  86         }
  87
  88         private Object invokeProperty(Object source, Class<?> sourceClass, Iterator<String> parameterIterator) throws IllegalAccessException,
  89                         InvocationTargetException {
  90                 Object value;
  91                 String param = parameterIterator.next();
  92                 PropertyDescriptor propertyDescriptor = BeanUtils.getPropertyDescriptor(sourceClass, param);
  93                 Method method = propertyDescriptor.getReadMethod();
  94                 method.setAccessible(true);
  95                 assert method != null;
  96                 value = method.invoke(source);
  97                 if(parameterIterator.hasNext()){
  98                         return invokeProperty(source, sourceClass, parameterIterator);
  99                 } else {
 100                         return value;
 101                 }
 102         }
 103
 104         public void setApplicationContext(ApplicationContext applicationContext)
 105                         throws BeansException {
 106                 this.applicationContext = applicationContext;
 107         }
 108
 109
 110 }