com.pmarlen.model.controller.EntityJPAToPlainPojoTransformer.java Source code

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Here is the source code for com.pmarlen.model.controller.EntityJPAToPlainPojoTransformer.java

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package com.pmarlen.model.controller;

import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.Hashtable;
import java.util.List;
import javax.persistence.Entity;
import org.apache.commons.beanutils.BeanUtils;
import org.apache.commons.beanutils.PropertyUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 *
 * @author alfredo
 */
public class EntityJPAToPlainPojoTransformer {

    private static Logger logger = LoggerFactory.getLogger(EntityJPAToPlainPojoTransformer.class);

    public static void copyPlainValues(Entity entity, Object plain) {
        final Class entityClass;
        entityClass = entity.getClass();
        final String entityClassName = entityClass.getName();
        Hashtable<String, Object> propertiesToCopy = new Hashtable<String, Object>();
        Hashtable<String, Object> propertiesM2MToCopy = new Hashtable<String, Object>();
        List<String> propertiesWithNULLValueToCopy = new ArrayList<String>();
        List<String> propertiesKey = new ArrayList<String>();
        try {
            final Field[] declaredFields = entityClass.getDeclaredFields();
            for (Field f : declaredFields) {
                logger.trace("->create: \tcopy: " + entityClassName + "." + f.getName() + " accesible ? "
                        + (f.isAccessible()));
                if (!f.isAccessible()) {

                    if (f.isAnnotationPresent(javax.persistence.Id.class)) {
                        propertiesKey.add(f.getName());
                    }
                    if (f.isAnnotationPresent(javax.persistence.Id.class)
                            && !f.isAnnotationPresent(javax.persistence.GeneratedValue.class)
                            && !Modifier.isStatic(f.getModifiers())) {

                        Object valueCopyed = PropertyUtils.getProperty(entity, f.getName());
                        if (valueCopyed != null) {
                            propertiesToCopy.put(f.getName(), valueCopyed);
                        } else {
                            propertiesWithNULLValueToCopy.add(f.getName());
                        }
                        logger.trace("->create:\t\t ID elegible 2 be copied, added to copy list: " + f.getName()
                                + " = " + valueCopyed + ", is really null?" + (valueCopyed == null));
                    } else if (!f.isAnnotationPresent(javax.persistence.Id.class)
                            && !f.isAnnotationPresent(javax.persistence.OneToMany.class)
                            && !f.isAnnotationPresent(javax.persistence.ManyToMany.class)
                            && !Modifier.isStatic(f.getModifiers())) {

                        Object valueCopyed = PropertyUtils.getProperty(entity, f.getName());
                        if (valueCopyed != null) {
                            propertiesToCopy.put(f.getName(), valueCopyed);
                        } else {
                            propertiesWithNULLValueToCopy.add(f.getName());
                        }
                        logger.trace("->create:\t\t elegible 2 be copied, added to copy list: " + f.getName()
                                + " = " + valueCopyed + ", is really null?" + (valueCopyed == null));
                    } else if (!f.isAnnotationPresent(javax.persistence.Id.class)
                            && f.isAnnotationPresent(javax.persistence.ManyToMany.class)) {

                        Object valueCopyed = PropertyUtils.getProperty(entity, f.getName());
                        if (valueCopyed != null) {
                            propertiesM2MToCopy.put(f.getName(), valueCopyed);
                        } else {
                            propertiesWithNULLValueToCopy.add(f.getName());
                        }
                        logger.trace("->create:\t\t M2M elegible 2 be copied, added to copy list: " + f.getName()
                                + " = " + valueCopyed + ", is really null?" + (valueCopyed == null));
                    }
                }
            }
            logger.trace("->create:copy values ?");
            for (String p2c : propertiesToCopy.keySet()) {
                Object valueCopyed = propertiesToCopy.get(p2c);
                logger.trace("->create:\t\t copy value with SpringUtils: " + p2c + " = " + valueCopyed
                        + ", is null?" + (valueCopyed == null));
                BeanUtils.copyProperty(plain, p2c, valueCopyed);
            }
            for (String p2c : propertiesWithNULLValueToCopy) {
                logger.trace("->create:\t\t copy null with SpringUtils");
                BeanUtils.copyProperty(plain, p2c, null);
            }
        } catch (Exception e) {
            logger.error("..in copy", e);
        }
    }
}