/** * 将params中的属性([attr(string)->value(object)],放入到实体类中。 * * <p>如果引用到了别的实体,那么<br> * 如果params中的id为null,则将该实体的置为null.<br> * 否则新生成一个实体,将其id设为params中指定的值。 空字符串按照null处理 */ public Object populate(Object entity, String entityName, Map<String, Object> params) { Type type = Model.getType(entityName); for (final Map.Entry<String, Object> paramEntry : params.entrySet()) { String attr = paramEntry.getKey(); Object value = paramEntry.getValue(); if (value instanceof String) { if (Strings.isEmpty((String) value)) { value = null; } else if (TRIM_STR) { value = ((String) value).trim(); } } // 主键 if (null != type && type.isEntityType() && attr.equals(((EntityType) type).getIdPropertyName())) { if (ValidEntityKeyPredicate.INSTANCE.evaluate(value)) { setValue(attr, value, entity); } else { try { PropertyUtils.setProperty(entity, attr, null); } catch (Exception e) { throw new RuntimeException(e.getMessage()); } } continue; } // 普通属性 if (-1 == attr.indexOf('.')) { setValue(attr, value, entity); } else { String parentAttr = Strings.substring(attr, 0, attr.lastIndexOf('.')); try { ObjectAndType ot = initProperty(entity, entityName, parentAttr); if (null == ot) { logger.error("error attr:[" + attr + "] value:[" + value + "]"); continue; } // 属性也是实体类对象 if (ot.getType().isEntityType()) { String foreignKey = ((EntityType) ot.getType()).getIdPropertyName(); if (attr.endsWith("." + foreignKey)) { if (null == value) { setValue(parentAttr, null, entity); } else { Object foreignValue = PropertyUtils.getProperty(entity, attr); // 如果外键已经有值 if (null != foreignValue) { if (!foreignValue.toString().equals(value.toString())) { setValue(parentAttr, null, entity); initProperty(entity, entityName, parentAttr); setValue(attr, value, entity); } } else { setValue(attr, value, entity); } } } else { setValue(attr, value, entity); } } else { setValue(attr, value, entity); } } catch (Exception e) { logger.error("error attr:[" + attr + "] value:[" + value + "]", e); } } if (logger.isDebugEnabled()) logger.debug("populate attr:[{}] value:[{}]", attr, value); } return entity; }