在客户现场进行技术验证的时候，客户需要将预定义主从实体的数据复制到正式主从实体中，并进行持久化将正式数据保存到正式表中。考虑到EOS开发平台中，可以借助 Hibernate 关联操作（插入、更新）数据集中主从表数据，只需要解决如何将预定义实体的数据转移到正式实体中。实体关系如下图所示：
在EOS中的 com.eos.foundation 构件库中存在com.eos.foundation.data.DataObjectUtil.convertDataObject 方法，可以将单层的数据进行转换。通过分析，数据集的定义不能确定如何关联从表的引用，所以需要明确定义从表的引用名称需要相同（如上图红色方框）。另外，在数据集定义的时候，未明确定义 1:1 关系的引用，所以在这里明确修改 1:1 引用名为 targetHead。
下面附上代码的简单实现：
package com.primeton.eos.foundationX; import java.util.List; import com.eos.foundation.ExceptionConstant; import com.eos.foundation.common.utils.StringUtil; import com.eos.foundation.data.DataObjectUtil; import com.eos.system.annotation.Bizlet; import com.eos.system.exception.EOSRuntimeException; import com.primeton.data.sdo.impl.TypeReference; import com.primeton.ext.data.sdo.DataUtil; import commonj.sdo.DataObject; import commonj.sdo.Property; /** * @author Flying Rat * @date 2015-01-13 10:59:42 */ @Bizlet("数据对象操作扩展") public class DataObjectUtilX { @Bizlet("为数据对象指定属性填充数据") public static DataObject setProperty(DataObject dataObject, String key, String value) { if (dataObject == null) { return null; } if (StringUtil.isBlank(key)) { throw new EOSRuntimeException(ExceptionConstant.PARAM_IS_BLANK, new String[] { "key:" + key }); } dataObject.set(key, value); return dataObject; } @Bizlet("为数据对象指定属性填充数据，深层填充。") public static DataObject setProperty(DataObject dataObject, String key, Object value, boolean recursion) { if (dataObject == null) { return null; } if (StringUtil.isBlank(key)) { throw new EOSRuntimeException(ExceptionConstant.PARAM_IS_BLANK, new String[] { "key:" + key }); } dataObject.set(key, value); @SuppressWarnings("unchecked") List<Property> list = dataObject.getInstanceProperties(); for (Property prop : list) { if (dataObject.isSet(prop)) {// 如果该属性可配置 if (prop.getName().equals(key)) { if (prop.getType().isDataType()) { dataObject.set(key, DataUtil.toSDOValue(prop.getType(), value)); } else { dataObject.set(key, value); } } else if (recursion && !prop.getType().isDataType()) { @SuppressWarnings("unchecked") List<DataObject> subObject = (List<DataObject>) dataObject.get(prop); for (DataObject o : subObject) { DataObjectUtilX.setProperty(o, key, value, recursion); } } } } return dataObject; } @Bizlet("将DataObject转化为目标实体类型的DataObject，深层转化。") public static DataObject convertDataObject(DataObject srcDataObject) { if (srcDataObject == null) { return null; } String targetEntityName = null; @SuppressWarnings("unchecked") List<Property> list = srcDataObject.getInstanceProperties(); for (Property srcProp : list) { if (srcDataObject.isSet(srcProp)) {// 如果该属性可配置 String propertyName = srcProp.getName();// 获取该属性名 if ("targetHead".equals(propertyName)) { targetEntityName = ((TypeReference) srcProp.getType()).getEntityName(); } } } if (StringUtil.isBlank(targetEntityName)) { throw new EOSRuntimeException(ExceptionConstant.PARAM_IS_BLANK, new String[] { "targetEntityName" }); } DataObject targetDataObject = DataObjectUtil.createDataObject(targetEntityName); for (Property srcProp : list) { if (srcDataObject.isSet(srcProp)) {// 如果该属性可配置 Object value = srcDataObject.get(srcProp);// 获取该属性值 String propertyName = srcProp.getName();// 获取该属性名 if (srcProp.getType().isDataType()) { Property targetProp = targetDataObject.getInstanceProperty(propertyName);// 实例化目标对象的该属性 if (null != targetProp) {// 如果目标对象存在该属性 if (targetProp.getType().isDataType()) { targetDataObject.set(propertyName, DataUtil.toSDOValue(targetProp.getType(), value)); } else { targetDataObject.set(propertyName, value); } } else if (targetDataObject.getType().isOpen()) { targetDataObject.set(propertyName, value); } } else { String propName = srcProp.getName(); Property targetProp = targetDataObject.getInstanceProperty(propName); if (null != targetProp) {// 如果目标对象存在该属性 if (srcProp.isMany()) { DataObject[] d = DataObjectUtil.convertDataObjects(value, ((TypeReference) targetProp.getType()).getEntityName(), true); targetDataObject.set(propName, d); } else { DataObject d = DataObjectUtil.convertDataObject((DataObject) value, ((TypeReference) targetProp.getType()).getEntityName(), true); targetDataObject.set(propName, d); } } } } } return targetDataObject; } @Bizlet("将DataObject转化为目标实体类型的DataObject，深层转化。") public static DataObject convertDataObject(DataObject srcDataObject, String targetEntityName) { if (srcDataObject == null) { return null; } if (StringUtil.isBlank(targetEntityName)) { throw new EOSRuntimeException(ExceptionConstant.PARAM_IS_BLANK, new String[] { "targetEntityName" }); } DataObject targetDataObject = DataObjectUtil.createDataObject(targetEntityName); @SuppressWarnings("unchecked") List<Property> list = srcDataObject.getInstanceProperties(); for (Property srcProp : list) { if (srcDataObject.isSet(srcProp)) {// 如果该属性可配置 Object value = srcDataObject.get(srcProp);// 获取该属性值 String propertyName = srcProp.getName();// 获取该属性名 if (srcProp.getType().isDataType()) { Property targetProp = targetDataObject.getInstanceProperty(propertyName);// 实例化目标对象的该属性 if (null != targetProp) {// 如果目标对象存在该属性 if (targetProp.getType().isDataType()) { targetDataObject.set(propertyName, DataUtil .toSDOValue(targetProp.getType(), value)); } else { targetDataObject.set(propertyName, value); } } else if (targetDataObject.getType().isOpen()) { targetDataObject.set(propertyName, value); } } else { String propName = srcProp.getName(); Property targetProp = targetDataObject.getInstanceProperty(propName); if (null != targetProp) {// 如果目标对象存在该属性 if (srcProp.isMany()) { DataObject[] d = DataObjectUtil.convertDataObjects(value, ((TypeReference) targetProp.getType()).getEntityName(), true); targetDataObject.set(propName, d); } else { DataObject d = DataObjectUtil.convertDataObject((DataObject) value, ((TypeReference) targetProp.getType()).getEntityName(), true); targetDataObject.set(propName, d); } } } } } return targetDataObject; } }
在上面的 DataObjectUtilX 工具类中，setProperty 方法是为 DataObject 对象赋值，convertDataObject 方法是 DataObject 数据复制到目标 DataObject 对象中。
