OAF开发中一些LOV相关技巧 (转)

public void processRequest(OAPageContext pageContext, OAWebBean webBean)
{
super.processRequest(pageContext, webBean);
OAApplicationModule am = pageContext.getApplicationModule(webBean);
Dictionary passiveCriteria = pageContext.getLovCriteriaItems();
//此处的LookupType指的是Mapping中的Lov Region Item的ID
String lovCriteria = (String)passiveCriteria.get("LookupType");

OAViewObject lovVO = (OAViewObject)am.findViewObject("FndLookupTypeLovVO1");
//根据得到的验证字段限定查询结果
lovVO.setWhereClause("");
lovVO.executeQuery();
} 

/**Item版本控制，当选择了有版本控制的Item，该行版本字段可修改，如果没有版本控制，该Item版本字段为默认**/
super.processFormRequest(pageContext, webBean);
OAApplicationModule am = pageContext.getApplicationModule(webBean);
if("ItemCode".equals(pageContext.getLovInputSourceId()))
{ 

/**lovUpdate是在Lov Region选择了Item，lovValidate是在Lov MessageInput控件中输入后触发，在此事件中判断Item是否具有版本控制**/
if( "lovUpdate".equals(pageContext.getParameter(EVENT_PARAM))
|| "lovValidate".equals(pageContext.getParameter(EVENT_PARAM)))
{
/**对Revision字段进行控制**/
am.invokeMethod("controlRevSwitcher", new Serializable[] 
{pageContext.getParameter(SOURCE_PARAM),
pageContext.getParameter("OrganizationIdFV")});


/**controlRevSwitcher方法是对版本控件的ReadOnly进行控制，但是页面上不能马上反应，需要使用局部刷新**/
OAAdvancedTableBean tableBean = 
(OAAdvancedTableBean)webBean.findChildRecursive("VenTrxLinesAdvTbl");
tableBean.queryData(pageContext);
} 
} 

// Form. was submitted because the user selected
// a value from the LOV modal window,
// or because the user tabbed out of the LOV input.
// Find out which LOV input triggered the event.
String lovInputSourceId = pageContext.getParameter(SOURCE_PARAM);
// Find out the result values of the LOV.
Hashtable lovResults =
pageContext.getLovResultsFromSession(lovInputSourceId);
if (lovResults != null)
{
System.out.println("lovResults"+lovResults);
// Update the page depending on the value chosen by the user.
} 

import java.util.ArrayList;
import java.util.Hashtable;

import oracle.apps.fnd.common.VersionInfo;
import oracle.apps.fnd.framework.OAApplicationModule;
import oracle.apps.fnd.framework.webui.OAControllerImpl;
import oracle.apps.fnd.framework.webui.OAPageContext;
import oracle.apps.fnd.framework.webui.beans.OAWebBean;
import oracle.apps.fnd.framework.webui.beans.layout.OAHeaderBean;
import oracle.apps.fnd.framework.webui.beans.message.OAMessageLovInputBean;

public void processRequest(OAPageContext pageContext, OAWebBean webBean)
{
super.processRequest(pageContext, webBean);
OAApplicationModule am = pageContext.getApplicationModule(webBean);

/*--------------------------------------------------创建LOV Bean----------------------------------------------------*/

OAHeaderBean headerBean = (OAHeaderBean)webBean.findChildRecursive("TestHdRN");
OAMessageLovInputBean lovInput = (OAMessageLovInputBean)createWebBean(pageContext, LOV_TEXT, null, "InputTest");

headerBean.addIndexedChild(lovInput);

// Specify the path to the base page.
lovInput.setAttributeValue(REGION_CODE, "/alther/oracle/apps/cux/checkboxtest/webui/CheckBoxTestPG");
// Specify the application id of the base page.
lovInput.setAttributeValue(REGION_APPLICATION_ID, new Integer(30001)); 

//此处的Region就是刚才创建的Region
lovInput.setLovRegion("/alther/oracle/apps/cux/lov/webui/CommonLovRN", 0);

lovInput.setUnvalidated(false);
lovInput.setPrompt("Dynamic Lov");

//增加Mapping关系，由于LOV的Mapping在主页面初始化时就会使用到，所以必须创建一些空的Item来做Mapping，否则会报错
lovInput.addLovRelations(pageContext, "InputTest", // base page item
"DisplayItem1", // lov item
LOV_RESULT, // direction
LOV_REQUIRED_NO);
lovInput.addLovRelations(pageContext, "InputTest", // base page item
"DisplayItem1", // lov item
LOV_CRITERIA, // direction
LOV_REQUIRED_NO); 

lovInput.addLovRelations(pageContext, "TestItem", // base page item
"DisplayItem2", // lov item
LOV_PASSIVE_CRITERIA, // direction
LOV_REQUIRED_NO); 

/*--------------------------------------------------创建LOV VO------------------------------------------------------*/
ArrayList paramList = new ArrayList();
String voName = "FndUserLovVO2";
String sql = "SELECT fu.user_id," + 
" fu.user_name," + 
" fu.start_date" + 
" FROM fnd_user fu";

//paramList是用来创建LOV并在关联时都会用到的每个Item的Attribute
paramList.add(new String[]{"UserId", "USER_ID", "oracle.jbo.domain.Number", null, "Hide", null});
paramList.add(new String[]{"UserName", "USER_NAME", "java.lang.String", "100", "Display", "SearchAllow"});
paramList.add(new String[]{"StartDate", "START_DATE", "oracle.jbo.domain.Date", null, "Display", null});
//调用AM方法创建VO
am.invokeMethod("createVO", new Serializable[]{voName, sql, paramList},
new Class[]{String.class, String.class, paramList.geTCLass()});

am.getOADBTransaction().putTransientValue("LovVOInstance", voName);
am.getOADBTransaction().putTransientValue("LovAttribute", paramList);

} 

import java.sql.Types;

import java.util.ArrayList;

import oracle.apps.fnd.framework.server.OAApplicationModuleImpl;
import oracle.apps.fnd.framework.server.OADBTransaction;
import oracle.apps.fnd.framework.server.OAViewDef;

import oracle.jbo.AttributeDef;

public void createVO(String voName, String sql, ArrayList list){
OADBTransaction dbtx = getOADBTransaction();
String[] attribute = new String[6];
int types = -9999;
OAViewDef viewDef = dbtx.createViewDef();

viewDef.setSql(sql);
viewDef.setExpertMode(true);
viewDef.setViewObjectClass("oracle.apps.fnd.framework.server.OAViewObjectImpl");
viewDef.setViewRowClass("oracle.apps.fnd.framework.server.OAViewRowImpl");

for(int i = 0; i < list.size(); i++){
attribute = (String[])list.get(i);
if("java.lang.String".equals(attribute[2])){
types = Types.VARCHAR;
}
else if("oracle.jbo.domain.Number".equals(attribute[2])){
types = Types.NUMERIC;
}
else if("oracle.jbo.domain.Date".equals(attribute[2])){
types = Types.DATE;
}

if("java.lang.String".equals(attribute[2])){
viewDef.addSqlDerivedAttrDef( attribute[0], 
attribute[1], 
attribute[2], 
types,
false,
true,
AttributeDef.UPDATEABLE,
Integer.parseInt(attribute[3]));
}
else{
viewDef.addSqlDerivedAttrDef( attribute[0],
attribute[1], 
attribute[2], 
types,
false,
true,
AttributeDef.UPDATEABLE); }
}

if(findViewObject(voName) != null){
findViewObject(voName).remove();
}

createViewObject(voName, viewDef);
} 

public void processRequest(OAPageContext pageContext, OAWebBean webBean)
{
super.processRequest(pageContext, webBean);
OAApplicationModule am = pageContext.getApplicationModule(webBean);

String voInstance = (String)am.getOADBTransaction().getTransientValue("LovVOInstance");
ArrayList paramList = (ArrayList)am.getOADBTransaction().getTransientValue("LovAttribute");
String[] attribute = new String[6];
int dispalyIndex = 1;
int hideIndex = 1;

//关联VO
((OAListOfValuesBean)webBean).setViewUsageName(voInstance); 

//将Region中的MessageStyledText都设置为不显示
for(int i=1; i<=5; i++){
OAMessageStyledTextBean displayItem =
(OAMessageStyledTextBean)webBean.findChildRecursive("DisplayItem"+i);
displayItem.setRendered(false);
}

//将Region中的FormValue都设置为不显示
for(int i=1; i<=5; i++){
OAFormValueBean hideItem =
(OAFormValueBean)webBean.findChildRecursive("FormVal"+i);
hideItem.setRendered(false);
}

for(int i=0; i<paramList.size(); i++){
attribute = (String[])paramList.get(i);
if(attribute[4] != null && "Display".equals(attribute[4])){
OAMessageStyledTextBean displayItem = 
(OAMessageStyledTextBean)webBean.findChildRecursive("DisplayItem"+dispalyIndex);

//关联View Attribute
displayItem.setViewAttributeName(attribute[0]);

//设置Data Type
if("java.lang.String".equals(attribute[2])){
displayItem.setDataType("VARCHAR2");
}
else if("oracle.jbo.domain.Number".equals(attribute[2])){
displayItem.setDataType("NUMBER");
}
else if("oracle.jbo.domain.Date".equals(attribute[2])){
displayItem.setDataType("DATE");
}
//设置显示
displayItem.setRendered(true);

//是否可查询
if(attribute[5] != null && "SearchAllow".equals(attribute[5])){
displayItem.setQueryable(true);
}

dispalyIndex++;
}
else if(attribute[4] != null && "Hide".equals(attribute[4])){
OAFormValueBean hideItem = 
(OAFormValueBean)webBean.findChildRecursive("FormVal"+hideIndex);

//hideItem.setViewUsageName("FndUserLovVO2");
hideItem.setViewAttributeName(attribute[0]);

if("java.lang.String".equals(attribute[2])){
hideItem.setDataType("VARCHAR2");
}
else if("oracle.jbo.domain.Number".equals(attribute[2])){
hideItem.setDataType("NUMBER");
}
else if("oracle.jbo.domain.Date".equals(attribute[2])){
hideItem.setDataType("DATE");
}

hideItem.setRendered(true);

hideIndex++;
}
}
}