/*
* 文件名称: KvUtil.java
* 版权信息: Copyright 2013-2014 chunchen technology Co., LTD. All right reserved.
* ----------------------------------------------------------------------------------------------
* 修改历史:
* ----------------------------------------------------------------------------------------------
* 修改原因: 新增
* 修改人员: zhangyz
* 修改日期: 2014-3-12
* 修改内容:
*/
package com.mfh.comna.comn.bean;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import com.mfh.comn.bean.EntityWrapper;
import net.tsz.afinal.db.table.Id;
import net.tsz.afinal.db.table.Property;
import net.tsz.afinal.db.table.TableInfo;
/**
* 支持将原始数据结构EntityWrapperbean的导出成GroupKeyValue界面显示结构(key-value)形式，便于view层使用。
* @author zhangyz created on 2014-3-12
*/
public class KvBean<T> {
protected EntityWrapper<T> wrapperBean = null;
private transient List<GroupKeyValue> kvsList = null;//供在列表中显示一条记录
private transient List<GroupKeyValue> kvsDetail = null;//供在详细页面中显示一条记录
private final static String KEY_SEPARATOR = "key_seprator";
// 测试需要
public KvBean() {
}
/**
* 按分隔bean构造
* @param caption
*/
public KvBean(String caption) {
wrapperBean = new EntityWrapper<T>(null);
wrapperBean.addCaption(KEY_SEPARATOR, caption);
}
/**
* 按真实bean构造
* @param bean
*/
public KvBean(T bean) {
super();
this.wrapperBean = new EntityWrapper<T>(bean);
}
/**
* 按真实bean构造
* @param wrapperBean
*/
public KvBean(EntityWrapper<T> wrapperBean) {
super();
this.wrapperBean = wrapperBean;
}
/**
* 是否分隔bean
* @return
*/
public boolean isSeparator() {
if (wrapperBean != null && (wrapperBean.getBean() == null)
&& wrapperBean.getCaption() != null) {
return true;
}
else
return false;
}
/**
* 获取分隔标题
* @return
*/
public String getSeparatTitle() {
if (isSeparator()) {
return wrapperBean.getCaption().get(KEY_SEPARATOR);
}
else
return null;
}
/**
* 转换形式
* @param wrapperBeans
* @return
* @author zhangyz created on 2014-3-12
*/
public static <T> List<KvBean<T>> exportToKvs(List<EntityWrapper<T>> wrapperBeans) {
if (wrapperBeans == null)
return null;
List<KvBean<T>> ret = new ArrayList<KvBean<T>>();
for (EntityWrapper<T> wrapper : wrapperBeans) {
ret.add(new KvBean<T>(wrapper));
}
return ret;
}
/**
* 直接把bean转换成目标格式
* @param beans
* @param <T>
* @return
*/
public static <T> List<KvBean<T>> exportToKvsDirect(List<T> beans) {
if (beans == null)
return null;
List<KvBean<T>> ret = new ArrayList<KvBean<T>>();
for (T bean : beans) {
ret.add(new KvBean<T>(new EntityWrapper(bean)));
}
return ret;
}
/**
* 获取实际bean对象
* @return
* @author zhangyz created on 2014-3-12
*/
public T getBean() {
return wrapperBean.getBean();
}
/**
* 将bean导出成key-value形式，供界面上列表直接显示一条记录。
* 其中key是属性名，value是中文名
* @return
* @author zhangyz created on 2014-3-10
*/
public List<GroupKeyValue> getKvsList() {
if (kvsList == null)
kvsList = exportKeyValueInner(false);
return kvsList;
}
/**
* 获取指定属性的属性值（字符串值）,若该属性不存在则抛出异常提醒错误
* @param propName
* @return
* @author zhangyz created on 2014-3-12
*/
public String getPropValue(String propName) {
List<GroupKeyValue> kvs = getKvsList();
for (GroupKeyValue item : kvs) {
if (item.getKey().equals(propName))
return item.getValueStr();
}
throw new RuntimeException("不存在的属性名，请检查!");
}
/**
* 将bean导出成key-value形式，供界面上单条记录详细显示。
* 其中key是属性名的中文名，value是中文名，两个都是中文名
* @return
* @author zhangyz created on 2014-3-10
*/
public List<GroupKeyValue> getKvsDetail() {
if (kvsDetail == null)
kvsDetail = exportKeyValueInner(true);
return kvsDetail;
}
/**
* 将bean导出成key-value形式
* @param detail true：详细页面显示；false：列表下显示
* @return
* @author zhangyz created on 2014-3-10
*/
private List<GroupKeyValue> exportKeyValueInner(boolean detail) {
T bean = wrapperBean.getBean();
Map<String, String> captions = wrapperBean.getCaption();
TableInfo table = TableInfo.get(bean.getClass());
Iterator<Property> iter = table.propertyMap.values().iterator();
List<GroupKeyValue> result = new ArrayList<GroupKeyValue>();
Object propValue;
String caption;
String propName = "id";
Id id = table.getId();
if (id != null) {
propValue = id.getValue(bean);
caption = getFactCaption(propName, propValue, captions);
if (detail)
result.add(new GroupKeyValue(id.getCaption() == null ? propName : id.getCaption(), caption));
else
result.add(new GroupKeyValue(propName, caption));
}
while (iter.hasNext()) {
Property prop = iter.next();
propName = prop.getFieldName();
propValue = prop.getValue(bean);
caption = getFactCaption(propName, propValue, captions);
if (detail)
result.add(new GroupKeyValue(prop.getCaption() == null ? propName : prop.getCaption(), caption));
else
result.add(new GroupKeyValue(propName, caption));
}
return result;
}
private String getFactCaption(String propName, Object propValue,
Map<String, String> captions) {
if (captions != null) {
String captionValue = captions.get(propName);
if (captionValue != null)
propValue = captionValue;
}
if (propValue == null)
return "";
else
return propValue.toString();
}
}