src/persistence/org/codehaus/groovy/grails/orm/hibernate/support/HibernateBeanWrapper.java

   1 package org.codehaus.groovy.grails.orm.hibernate.support;
   2
   3 import org.apache.commons.logging.Log;
   4 import org.apache.commons.logging.LogFactory;
   5 import org.hibernate.Hibernate;
   6 import org.springframework.beans.BeanWrapperImpl;
   7 import org.springframework.beans.BeansException;
   8
   9 import java.beans.PropertyDescriptor;
  10 import java.lang.reflect.Method;
  11
  12 /**
  13  * BeanWrapper implementaion that will not lazy initialize entity properties.
  14  */
  15 public class HibernateBeanWrapper extends BeanWrapperImpl {
  16 // ------------------------------ FIELDS ------------------------------
  17
  18     private static final Log log = LogFactory.getLog(HibernateBeanWrapper.class);
  19
  20 // --------------------------- CONSTRUCTORS ---------------------------
  21
  22     public HibernateBeanWrapper() {
  23     }
  24
  25     public HibernateBeanWrapper(boolean b) {
  26         super(b);
  27     }
  28
  29     public HibernateBeanWrapper(Object o) {
  30         super(o);
  31     }
  32
  33     public HibernateBeanWrapper(Class aClass) {
  34         super(aClass);
  35     }
  36
  37     public HibernateBeanWrapper(Object o, String s, Object o1) {
  38         super(o, s, o1);
  39     }
  40
  41 // ------------------------ INTERFACE METHODS ------------------------
  42
  43
  44 // --------------------- Interface PropertyAccessor ---------------------
  45
  46     /**
  47      * Checks Hibernate.isInitialized before calling super method.
  48      *
  49      * @param name target property
  50      * @return null if false or super'name value if true
  51      * @throws BeansException
  52      */
  53     public Object getPropertyValue(String name) throws BeansException {
  54         PropertyDescriptor desc = getPropertyDescriptor(name);
  55         Method method = desc.getReadMethod();
  56         Object owner = getWrappedInstance();
  57         try {
  58             if (Hibernate.isInitialized(method.invoke(owner, null))) {
  59                 return super.getPropertyValue(name);
  60             }
  61         } catch (Exception e) {
  62             log.error("Error checking Hibernate initialization on method " +
  63                     method.getName() + " for class " + owner.getClass(), e);
  64         }
  65         return null;
  66     }
  67 }