Creating objects using reflection

Hi,
I need to construct a new instance using reflection and passing parameters. If the parameters are of primitive type ex. int, how can I pass them in the Class[] type of object

Integer.TYPE, etc. are Class objects that represent the types of the primitives.

Similar Messages

Dynamic creating SAPBobsCOM objects using reflection

Hi All,
I'm writing a tool (C#) for SBO for exporting object (oItems, oBanks etc.) to XML files. And I have a problem how to dynamically create object by it's string description. I'm trying to create it using System.Reflection, but cant't find right way to create it.
It must be like that, but it doesn't work:
           Type sboObject = System.Type.GetType("SAPbobsCOM.Items, Interop.SAPbobsCOM", true, true);
           object ibaseObject = Activator.CreateInstance(sboObject);
Any ideas?)

Hi
I've writen this code for instantiating DI API objects using .NET reflection
        private object getObjectBo(int tipo) //tipo: integer representing the object type
            object o = null;
            try
                Type tipoComp = kernel.Company.GetType(); //Type SAPbobsCOM.Company
                MethodInfo info = tipoComp.GetMethod("GetBusinessObject");
                object[] parametros = new object[1]; //Parameters of GetBusinessObject
                object tipoObj = Enum.ToObject(typeof(SAPbobsCOM.BoObjectTypes), tipo);
                parametros[0] = tipoObj;
                o = info.Invoke(kernel.Company, parametros); //Calling GetBusinessObject
            catch (Exception ex)
                kernel.Application.MessageBox(ex.Message, 0, "", "", "");
            return o;
The object returned is COM object (not managed code) then we can't use .NET reflection directly for exploring its methods and attributes .. I think we should use C++ and IDispatch interface, but i don't know how do this yet.
Hope it helps.
Regards

Error creating Objects with Reflection

This is the code:
try{
     System.out.println("Restart - test 1 - sub == " + sub);
     c = Class.forName(sub);
     con = c.getDeclaredConstructor();
catch(NoSuchMethodException e){
     System.out.println("Unknown event type\t" + e);
}Output:
Restart - test 1 - sub == Mouse
Unknown event type     java.lang.NoSuchMethodException: Mouse.<init>()I have a Mouse class with a declared Constructor. Why can't it find the Constructor?

SquareBox wrote:
almightywiz wrote:
Your code is trying to find the default constructor for your Mouse class. If you don't have a default constructor specified, it will throw the exception you encountered. What does your constructor signature look like?
public Mouse(int weight){
     this.weight = weight;
}How do I get the Constructor if it contains parameters?This is answered in your other thread: Creating objects with relfections And you even marked it correct!
Please don't post the same question multiple times. It leads to people wasting their time duplicating each others' answers, and makes for a fractured discussion.
Edited by: jverd on Apr 26, 2011 3:59 PM

Create objects using functions?

I tried turning the following object (clear sake) into the product of a function (see below),
however, my attempts to display any kind of output produces "undefined".
------------ old code ----------------
drink = new Object();
drink.原酒 = new Object();
drink.原酒.nm = "原酒";
drink.原酒.dis = ???; //display price;
drink.原酒.prc = 40; //actual price;
drink.原酒.cal = 980; //whole bottle
drink.原酒.alc = 156; //alcohol: % alcohol * calories;
trace(drink.原酒.nm);
//works
------------ new code ----------------
drink = new Object();
function booze(mc, a, b, c, d, e){
mc = new Object();
mc.nm = a; mc.dis = b; mc.prc = c; mc.cal = d; mc.alc = e;
booze(drink.原酒, "原酒", "???", 40, 980, 156);
trace(drink.原酒.nm);
//fails

It'd be nice if there is a book that has all the tricks of the trade nicely presented, but I don't own it if there is... I don't care for books. Syntax is something that I've just come to understand thru years of losing hair trying to solve things.
That bit with the brackets, which I call bracket notation, and others call array notation, comes in very handy when you want to use a string to target an object. When you learn how to use them you end up finding that the syntax is just like what you would use for an array. In your case, there was the string b variable, which you were using to name an object within the drink object (I assumed it was the same set of characters as those for the object you were naming).
So when I was using mc[a], the program was translating it as mc.原酒, which in turn became drink.原酒
The brackets cause the program to interpret whatever string is inside them as an object's name (or variable, or property... some named entity). As far as the syntax goes, it is just like using an array index specification, wherein there is no "." before the brackets, but there is after if there is more to the object being targeted...
for(i=0; i<10; i++){
someMC["childMC"+i]._visible = false;
In that example, I'm turning 10 child movieclips within someMC invisible. Their instance names are childMC0, childMC1, childMC2,etc.... Notice that there is no decimal point ahead of the brackets, but there is after to connect the _visible property. I don't know why it's like that, but it's memorized that way after years of using it.

Creating Object using Class.forName vs new

Hello,
Is there any difference between:
Class c = Class.forName("Foo");
Foo foo = (Foo) c.newInstance();
and
Foo foo = new Foo();
Thanks.

Simple search brings this:
http://forum.java.sun.com/thread.jspa?forumID=31&threadID=614699

XML document creation using reflection

Hi all,
I'm tyring to write a class which creates an XML document from objects passed in. For example, you call the add(Object) method and it takes your object, uses reflection, then outputs XML like this...
<fieldName>fieldValue<fieldName>
The only problem is that after looking through this forum I am a little concerned about the performance of my proposed solution (using reflection).
The class will be used in a batch process which processes millions of objects (to generate a whopping XML file that'll be sent on for further processing by a third party).
Is there a better way to do this than by using reflection?
This class is going to be used by multiple batch processes hence there will be lots of different object types passed (they'll also be new ones in the future that we don't even know about yet) hence my reflection choice.
Thanks,
Chris

The only problem is that after looking through this
forum I am a little concerned about the performance of
my proposed solution (using reflection).The only way that you'll know for sure is if you try it out. Write the code, test it, then run it in a profiler to find out where the performance problems (if any) are.
Is there a better way to do this than by using
reflection?Probably not, if you want to pass any arbitrary object to it.
One possible alternative is to have "XML aware" objects: define an interface WritesXML, that defines a method toXML(). You then check to see whether the given object implements this interface, and if it does you simply call the method, otherwise you use reflection.
Another alternative, assuming that your objects follow the Bean pattern, is to create "XML-ifiers" on the fly, similar to the way an app-server handles JSPs. First time you see an object you create a class that will write it to XML, then compile this class and invoke it for all subsequent objects. This will require that you have a JDK installed on the runtime machine, that the objects follow the Bean pattern, and that the number of instances of a given class are very high.
This class is going to be used by multiple batch
processes hence there will be lots of different object
types passed (they'll also be new ones in the future
that we don't even know about yet) hence my reflection
choice.Sounds like a good reason to use reflection.

Using reflection to get method body

Hi,
I'm just getting into this side of program and while I understand the use of reflection in oredr to obtain the constructor and method, parameters, fields etc I was wondering if its possible to grab the method body and copy it into a string.
So for example in the following class...
class MyClass
private String str;
MyClass(){}
public String MyMethod(String s)
str=s;
str=str+" was the String";
System.out.println(str);
return str;
...I need to capture just this code..
str=s;
str=str+" was the String";
System.out.println(str);
return str;
...as a string
The reason i need to do this is that I'm programming a mechanism for storing objects and their methods using JDBC.. I could use object serialisation and store as a blob, but I'm wanting to store the attributes of a class as seperate parts so I can retrieve bits of code from the database at some later time.
Thanks for any help you might give me
peace
neil

You say that you are trying to store the method body
into a database. This is to allow you to store an
object and its methods into a database. Are you trying
store the method text or its implementation (i.e class
or java). If it is the implementation then just
serialize the found method object using reflection.
WHY are you doing this ?? what about private methods,
class variables, class methods ???Hi, yes it is confusing to explain, but I'm experimenting with a new programming paradigm called AspectJ and I've only just got into Reflection. I'm creating a repository of Aspects (same as classes but with added functionality and some limitations) with JDBC and don't want to just serialise the object as a blob and so have created data tables to hold different parts of the anatomy of an Aspect and this was the only thing I was getting stuck on.
The idea is that the user is able to recall these whole aspects (or a part of them such as a method) on the fly and use them in a program. I realise that ther will be problems because these methods may have other dependencies such as the ones you explain above but its just experimental at the moment and those are the kinds of things I'm wanting to find out more.
I've seen examples of reflection for Objects but never for methods. So it is possible to capture just a method by serialisation using reflection? Any examples would be much appreciated.
Peace
Neil

Dynamic Creation of Objects using Tree Control

I am able to Create Dynamic Objets using List control in
flex,but not able to create objects using TreeControl,currently iam
using switch case to do that iam embedding source code please help
me how to do that
<?xml version="1.0" encoding="utf-8"?>

<mx:Application xmlns:mx="
http://www.adobe.com/2006/mxml"
layout="absolute">
<mx:XML id="treeDP">
<node label="Controls">
<node label="Button"/>
<node label="ComboBox"/>
<node label="ColorPicker"/>
<node label="Hslider"/>
<node label="Vslider"/>
<node label="Checkbox"/>
</node>
</mx:XML>
<mx:Script>
<![CDATA[
import mx.core.UIComponentGlobals;
import mx.containers.HBox;
import mx.controls.*;
import mx.controls.VSlider;
import mx.controls.Button;
import mx.controls.Alert;
import mx.core.UIComponent;
import mx.controls.Image;
import mx.managers.DragManager;
import mx.events.DragEvent;
import mx.controls.Tree;
import mx.core.DragSource
import mx.core.IFlexDisplayObject;
/*This function accepts the item as on when it is dragged
from tree Component */
private function ondragEnter(event:DragEvent) : void
if (event.dragSource.hasFormat("treeItems"))
DragManager.acceptDragDrop(Canvas(event.currentTarget));
DragManager.showFeedback(DragManager.COPY);
return;
else{
DragManager.acceptDragDrop(Canvas(event.currentTarget));
return;
/*This Function creates objects as the items are Dragged
from the TreeComponent
And Creates Objects as and When They Are Dropped on the
Container */
private function ondragDrop(event:DragEvent) : void
if (event.dragSource.hasFormat("treeItems"))
var items:Array =event.dragSource.dataForFormat("treeItems")
as Array;
for (var i:int = items.length - 1; i >= 0; i--)
switch(items
[email protected]())
case "Button":
var b:Button=new Button();
b.x = event.localX;
b.y = event.localY;
b.addEventListener(MouseEvent.MOUSE_MOVE,mouseMoveHandler);
myCanvas.addChild(b);
break;
case "ComboBox":
var cb:ComboBox=new ComboBox();
myCanvas.addChild(cb);
cb.x = event.localX;
cb.y = event.localY;
cb.addEventListener(MouseEvent.MOUSE_MOVE,mouseMoveHandler);
break;
case "ColorPicker":
var cp:ColorPicker=new ColorPicker();
myCanvas.addChild(cp);
cp.x = event.localX;
cp.y = event.localY;
cp.addEventListener(MouseEvent.MOUSE_MOVE,mouseMoveHandler);
break;
case "Vslider":
var vs:VSlider=new VSlider();
myCanvas.addChild(vs);
vs.x = event.localX;
vs.y = event.localY;
vs.addEventListener(MouseEvent.MOUSE_MOVE,mouseMoveHandler);
break;
case "Hslider":
var hs:HSlider=new HSlider();
myCanvas.addChild(hs);
hs.x = event.localX;
hs.y = event.localY;
hs.addEventListener(MouseEvent.MOUSE_MOVE,mouseMoveHandler);
break;
case "Checkbox":
var check:CheckBox=new CheckBox();
myCanvas.addChild(check);
check.x = event.localX;
check.y = event.localY;
check.addEventListener(MouseEvent.MOUSE_MOVE,mouseMoveHandler);
break;
else {
var Component:UIComponent =
event.dragSource.dataForFormat("items") as UIComponent ;
Component.x = event.localX;
Component.y = event.localY;
Component.addEventListener(MouseEvent.MOUSE_MOVE,mouseMoveHandler);
myCanvas.addChild(Component);
/*How to move the Objects within the Container */
public function mouseMoveHandler(event:MouseEvent):void{
var
dragInitiator:UIComponent=UIComponent(event.currentTarget);
var ds:DragSource = new DragSource();
ds.addData(dragInitiator,"items")
DragManager.doDrag(dragInitiator, ds, event);
]]>
</mx:Script>
<mx:Tree dataProvider="{treeDP}" labelField="@label"
dragEnabled="true" width="313" left="0" bottom="-193" top="0"/>
<mx:Canvas id="myCanvas" dragEnter="ondragEnter(event)"
dragDrop="ondragDrop(event)" backgroundColor="#DDDDDD"
borderStyle="solid" left="321" right="-452" top="0"
bottom="-194"/>
</mx:Application>
iwant to optimize the code in the place of switch case
TextText

Assuming your objects are known and what you need are simply
variable names created by the program, try using objects as
associative arrays:
var asArray:Object = new Object();
for (var n:int = 0; n < 10; n++) {
asArray["obj" + n] = new WHAT_EVER();

Create objects.

Hello:
I was install oracle 8.0.5 under linux, the documentation talk
about you must
create objects in one session different of the initial oracle
installation.
I installed oracle successfully, but now when i try to create
objects in other
orainst session appear one error:
oraview... file_not_found.
What can i do?
null

John Sanabria (guest) wrote:
: Hello:
: I was install oracle 8.0.5 under linux, the documentation talk
: about you must
: create objects in one session different of the initial oracle
: installation.
: I installed oracle successfully, but now when i try to create
: objects in other
: orainst session appear one error:
: oraview... file_not_found.
: What can i do?
Don't quite get your point but the usual way to create data
objects is: log into the oracle as an ordinary user and then
create object using the usual commands such as :CREATE TABLE
.....blah blah. If I didn't quite catch your meaning can you
specify your question a bit concrete.
John
null

How to create an array using reflection.

How to create an array using reflection.
I want to achive something like this,Object o;
o = (Object)(new TestClass[10]);but by use of reflection.
To create a single object is simple:Object o;
o = Class.forName("TestClass").newInstance();But how do I create an array of objects, when the class of objects is known only by name? (Can't use Object[] because even though an Object[] array can be filled with "TestClass" elements only, it Cannot be casted to a TestClass[] array)
Anybody knows?":-)
Ragnvald Barth
Software enigneer

Found it!
the java.lang.reflect.Array class solves it!
Yes !!!

How To: Use reflection to create instance of generic type?

I would like to be able to use reflection to instantiate an instance of a generic type, but can't seem to avoid getting type safety warnings from the compiler. (I'm using Eclipse 3.1.1) Here is a trivial example: suppose I want to create an instance of a list of strings using reflection.
My first guess was to write the following:
Class cls = Class.forName("java.util.ArrayList<String>");
List<String> myList = cls.newInstance();The call to Class.forName throws a ClassNotFoundException. OK, fine, so I tried this:
Class cls = Class.forName("java.util.ArrayList");
List<String> myList = cls.newInstance();Now the second line generates the warning "Type safety: The expression of type List needs unchecked conversion to conform to List<String>".
If I change the second line to
List<String> myList = (List<String>)cls.newInstance();then I get the compiler warning "Type safety: The cast from Object to List<String> is actually checking against the erased type List".
This is a trivial example that illustrates my problem. What I am trying to do is to persist type-safe lists to an XML file, and then read them back in from XML into type-safe lists. When reading them back in, I don't know the type of the elements in the list until run time, so I need to use reflection to create an instance of a type-safe list.
Is this erasure business prohibiting me from doing this? Or does the reflection API provide a way for me to specify at run time the type of the elements in the list? If so, I don't see it. Is my only recourse to simply ignore the type safety warnings?

Harald,
I appreciate all your help on this topic. I think we are close to putting this thing to rest, but I'd like to run one more thing by you.
I tried something similar to your suggestion:public static <T> List<T> loadFromStorage(Class<T> clazz) {
    List<T> list = new ArrayList<T>();
    for ( ...whatever ...) {
       T obj = clazz.newInstance();
       // code to load from storage ...
       list.add(obj);
    return list;
}And everything is fine except for one small gotcha. The argument to this method is a Class<T>, and what I read from my XML storage is the fully qualified name of my class(es). As you pointed out earlier, the Class.forName("Foo") method will return a Class<?> rather than a Class<Foo>. Therefore, I am still getting a compiler warning when attempting to produce the argument to pass to the loadFromStorage method.
I was able to get around this problem and eliminate the compiler warning, but I'm not sure I like the way I did it. All of my persistent classes extend a common base class. So, I added a static Map to my base class:class Base
   private static Map<String, Class<? extends Base>> classMap = null;
   static
      Map<String, Class<? extends Base>> map = new TreeMap<String, Class<? extends Base>>();
      classMap = Collections.synchronizedMap(map);
   public static Class<? extends Base> getClass(String name)
      return classMap.get(name);
   protected static void putClass(Class<? extends Base> cls)
      classMap.put(cls.getName(), cls);
}And added a static initializer to each of my persistent classes:class Foo extends Base
   static
      Base.putClass(Foo.class);
}So now my persistence code can replace Class.forName("my.package.Foo") with Base.getClass("my.package.Foo"). Since Foo.class is of type Class<Foo>, this will give me the Class<Foo> I want instead of a Class<?>.
Basically, it works and I have no compiler warnings, but it is unfortunate that I had to come up with my own mechanism to obtain a Class<Foo> object when my starting point was the string "my.package.Foo". I think that the JDK, in order to fully support reflection with generic types, should provide a standard API for doing this. I should not have to invent my own.
Maybe it is there and I'm just not seeing it. Do you know of another way, using reflection, to get from a string "my.package.Foo" to a Class<Foo> object?
Thanks again for your help,
Gary

Runtime error 429, activeX component cant create object while using netbet pro on windows 7 & 8.1 HELP!!!

runtime error 429, activeX component cant create object while using netbet pro
does anyone know what I could do to fix this problem??? netbet pro was't available for a while then it's back but has yet to run

What's netbet pro?
I'd recommend asking questions about third party applications in the vendor's forum, not a Microsoft forum meant for admin scripting.
EDIT: Ah, some gambling website...
Don't retire TechNet! -
(Don't give up yet - 12,950+ strong and growing)

Use Granfeldts Create Object to create dynamic groups

Trying to use Sorens Granfeldts, Create Object WF activity to create dynamic groups.
In a standard function evaluator activity I generate the Filter as [//WorkflowData/Filter]
The "string" I set it to is:
<Filter xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" Dialect="http://schemas.microsoft.com/2006/11/XPathFilterDialect" xmlns="http://schemas.xmlsoap.org/ws/2004/09/enumeration">/Person[ObjectID
= /*[ObjectID = '8dfcb5e8-ff01-400c-8ca7-2a0002d2d2d4']/ComputedMember]</Filter>
In the CreateObject activity I then just have [//WorkflowData/Filter],Filter among the initial values.
The creation works if I remove this attribute so the rest of the attributes seems to be working.
The creation fails however end I get the error below in the Forefront Identity Manager event log.
System.NullReferenceException: Object reference not set to an instance of an object.
   at Microsoft.ResourceManagement.WFActivities.Resolver.GetDisplayStringFromGuid(Guid id, String[] expansionAttributes)
   at Microsoft.ResourceManagement.WFActivities.Resolver.ReplaceGuidWithTemplatedString(Match m)
   at System.Text.RegularExpressions.RegexReplacement.Replace(MatchEvaluator evaluator, Regex regex, String input, Int32 count, Int32 startat)
   at System.Text.RegularExpressions.Regex.Replace(String input, MatchEvaluator evaluator)
   at Microsoft.ResourceManagement.WFActivities.Resolver.GetStringAttributeValue(Object attribute)
   at Microsoft.ResourceManagement.WFActivities.Resolver.ResolveEvaluatorWithoutAntiXSS(String match, ResolverOptions resolveOptions)
   at Microsoft.ResourceManagement.WFActivities.Resolver.ResolveEvaluatorForWithAntiXSS(String match, ResolverOptions resolveOptions)
   at Microsoft.ResourceManagement.WFActivities.Resolver.ReplaceMatches(String input, Boolean useAntiXssEncoding, ResolverOptions resolveOptions)
   at Microsoft.ResourceManagement.Workflow.Hosting.ResolverEvaluationServiceImpl.ResolveLookupGrammar(Guid requestId, Guid targetId, Guid actorId, Dictionary`2 workflowDictionary, Boolean encodeForHTML, String expression)
   at Microsoft.ResourceManagement.Workflow.Activities.ResolveGrammarActivity.Execute(ActivityExecutionContext executionContext)
   at System.Workflow.ComponentModel.ActivityExecutor`1.Execute(T activity, ActivityExecutionContext executionContext)
   at System.Workflow.ComponentModel.ActivityExecutor`1.Execute(Activity activity, ActivityExecutionContext executionContext)
   at System.Workflow.ComponentModel.ActivityExecutorOperation.Run(IWorkflowCoreRuntime workflowCoreRuntime)
   at System.Workflow.Runtime.Scheduler.Run()
Have anyone used this WF activity to create dynamic groups and can tell how to set the Filter?

Hey Kent!
I did the same thing, with Søren`s Create Object WF. I did it like this on the filter part:
<Filter xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" Dialect="http://schemas.microsoft.com/2006/11/XPathFilterDialect" xmlns="http://schemas.xmlsoap.org/ws/2004/09/enumeration">/Person[(Department = '[//Target/ObjectID]')]</Filter>,Filter
The whole thing looks like this:
(I use Function evaluator to generate a AccountName for groups based on a clean version of DisplayName).
[//Target/DisplayName],DisplayName
SEC_[//WorkFlowData/CleanAccountName],AccountName
[//Target/Manager],Owner
Security,Type
DOMAIN_STRING,Domain
Universal,Scope
[//Target/DisplayName]_SecGroup,Description
[//Target/Manager],DisplayedOwner
None,MembershipAddWorkflow
True,MembershipLocked
[//Target/CleanAccountName],MailNickname
<Filter xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" Dialect="http://schemas.microsoft.com/2006/11/XPathFilterDialect" xmlns="http://schemas.xmlsoap.org/ws/2004/09/enumeration">/Person[(Department = '[//Target/ObjectID]')]</Filter>,Filter
Regards, Remi www.iamblogg.com

Problem occured when create a tree table for master-detail view objects using SQL queries?

I am programming a tree table for master-detail view objects using SQL queries and these 2 view objects are not simple singel tables queries, and 2 complex SQL are prepared for master and view objects. see below:
1. Master View object (key attribute is SourceBlock and some varaible bindings are used for this view object.)
SELECT cntr_list.SOURCE_BLOCK,
        sum(
         case when cntr_list.cntr_size_q = '20'
              then cntr_list.cntr_qty
              else 0 end ) as cntr20 ,
        sum(
         case when cntr_list.cntr_size_q = '40'
              then cntr_list.cntr_qty
              else 0 end ) as cntr40 ,
         sum(
         case when cntr_list.cntr_size_q = '45'
              then cntr_list.cntr_qty
              else 0 end ) as cntr45
FROM (
    SELECT yb1.BLOCK_M as SOURCE_BLOCK,
           scn.CNTR_SIZE_Q,
           count(scn.CNTR_SIZE_Q) AS cntr_qty
    FROM SHIFT_CMR scm, SHIFT_CNTR scn, YARD_BLOCK yb1, YARD_BLOCK yb2
    WHERE
    scm.cmr_n = scn.cmr_n
    AND (scm.plan_start_dt BETWEEN to_date(:DateFrom,'YYYY/MM/DD HH24:MI:SS') AND to_date(:DateTo,'YYYY/MM/DD HH24:MI:SS')
    OR scm.plan_end_dt BETWEEN to_date(:DateFrom,'YYYY/MM/DD HH24:MI:SS') AND to_date(:DateTo,'YYYY/MM/DD HH24:MI:SS'))
    AND scm.shift_mode_c = :ShiftModeCode
    AND scm.end_terminal_c = :TerminalCode
    AND scm.start_terminal_c = yb1.terminal_c
    AND scm.start_block_n = yb1.block_n
    AND substr(scn.start_location_c,(instr(scn.start_location_c,',',1,5)+1),instr(scn.start_location_c,',',1,6)-(instr(scn.start_location_c,',',1,5)+1)) BETWEEN yb1.slot_from_n AND yb1.slot_to_n
    AND scm.end_terminal_c = yb2.terminal_c
    AND scm.end_block_n = yb2.block_n
    AND substr(scn.end_location_c,(instr(scn.end_location_c,',',1,5)+1),instr(scn.end_location_c,',',1,6)-(instr(scn.end_location_c,',',1,5)+1)) BETWEEN yb2.slot_from_n AND yb2.slot_to_n
    AND scn.status_c not in (1, 11)
    AND scn.shift_type_c = 'V'
    AND scn.source_c = 'S'
    GROUP BY yb1.BLOCK_M, scn.CNTR_SIZE_Q
) cntr_list
GROUP BY cntr_list.SOURCE_BLOCK
2. Detail View object (key attributes are SourceBlock and EndBlock and same varaible bindings are used for this view object.)
SELECT cntr_list.SOURCE_BLOCK, cntr_list.END_BLOCK,
        sum(
         case when cntr_list.cntr_size_q = '20'
              then cntr_list.cntr_qty
              else 0 end ) as cntr20 ,
        sum(
         case when cntr_list.cntr_size_q = '40'
              then cntr_list.cntr_qty
              else 0 end ) as cntr40 ,
         sum(
         case when cntr_list.cntr_size_q = '45'
              then cntr_list.cntr_qty
              else 0 end ) as cntr45
FROM (
    SELECT yb1.BLOCK_M as SOURCE_BLOCK,
           yb2.BLOCK_M as END_BLOCK,
           scn.CNTR_SIZE_Q,
           count(scn.CNTR_SIZE_Q) AS cntr_qty
    FROM SHIFT_CMR scm, SHIFT_CNTR scn, YARD_BLOCK yb1, YARD_BLOCK yb2
    WHERE
    scm.cmr_n = scn.cmr_n
    AND (scm.plan_start_dt BETWEEN to_date(:DateFrom,'YYYY/MM/DD HH24:MI:SS') AND to_date(:DateTo,'YYYY/MM/DD HH24:MI:SS')
    OR scm.plan_end_dt BETWEEN to_date(:DateFrom,'YYYY/MM/DD HH24:MI:SS') AND to_date(:DateTo,'YYYY/MM/DD HH24:MI:SS'))
    AND scm.shift_mode_c = :ShiftModeCode
    AND scm.end_terminal_c = :TerminalCode
    AND scm.start_terminal_c = yb1.terminal_c
    AND scm.start_block_n = yb1.block_n
    AND substr(scn.start_location_c,(instr(scn.start_location_c,',',1,5)+1),instr(scn.start_location_c,',',1,6)-(instr(scn.start_location_c,',',1,5)+1)) BETWEEN yb1.slot_from_n AND yb1.slot_to_n
    AND scm.end_terminal_c = yb2.terminal_c
    AND scm.end_block_n = yb2.block_n
    AND substr(scn.end_location_c,(instr(scn.end_location_c,',',1,5)+1),instr(scn.end_location_c,',',1,6)-(instr(scn.end_location_c,',',1,5)+1)) BETWEEN yb2.slot_from_n AND yb2.slot_to_n
    AND scn.status_c not in (1, 11)
    AND scn.shift_type_c = 'V'
    AND scn.source_c = 'S'
    GROUP BY yb1.BLOCK_M, yb2.BLOCK_M, scn.CNTR_SIZE_Q
) cntr_list
GROUP BY cntr_list.SOURCE_BLOCK, cntr_list.END_BLOCK
3. I create a view link to create master-detail relationship for these 2 view objects.
masterview.SourceBlock (1)->detailview.SourceBlock (*).
4. I create a tree table using these 2 view objects with master-detail relationship.
When I set default value for variable bindings of these 2 view objects and the matching records exist, tree table can work well. I can expand the master row to display detail row in UI.
But I need to pass in dymamic parameter value for variable bindings of these 2 view objects, tree table cannnot work again. when I expand the master row and no detail row are displayed in UI.
I am sure that I pass in correct parameter value for master/detail view objects and matching records exist.
Managed Bean:
        DCIteratorBinding dc = (DCIteratorBinding)evaluteEL("#{bindings.MasterView1Iterator}");
        ViewObject vo = dc.getViewObject();
        System.out.println("Before MasterView1Iterator vo.getEstimatedRowCount()="+ vo.getEstimatedRowCount());
        System.out.println("Before MasterView1Iterator ShiftModeCode="+ vo.ensureVariableManager().getVariableValue("ShiftModeCode"));
        vo.ensureVariableManager().setVariableValue("DateFrom", dateFrom);
        vo.ensureVariableManager().setVariableValue("DateTo", dateTo);
        vo.ensureVariableManager().setVariableValue("ShiftModeCode", shiftModeC);
        vo.ensureVariableManager().setVariableValue("TerminalCode", terminalCode);
        vo.executeQuery();
        System.out.println("MasterView1Iterator vo.getEstimatedRowCount()="+ vo.getEstimatedRowCount());
        DCIteratorBinding dc1 = (DCIteratorBinding)evaluteEL("#{bindings.DetailView1Iterator}");
        ViewObject vo1 = dc1.getViewObject();
        System.out.println("Before DetailView1Iterator vo1.getEstimatedRowCount()="+ vo1.getEstimatedRowCount());
        System.out.println("Before DetailView1Iterator ShiftModeCode="+ vo1.ensureVariableManager().getVariableValue("ShiftModeCode"));
        vo1.ensureVariableManager().setVariableValue("DateFrom", dateFrom);
        vo1.ensureVariableManager().setVariableValue("DateTo", dateTo);
        vo1.ensureVariableManager().setVariableValue("ShiftModeCode", shiftModeC);
        vo1.ensureVariableManager().setVariableValue("TerminalCode", terminalCode);
        vo1.executeQuery();
        System.out.println("after DetailView1Iterator vo1.getEstimatedRowCount()="+ vo1.getEstimatedRowCount());
5. What's wrong in my implementation? I don't have no problem to implement such a tree table if using simple master-detail tables view object, but now I have to use such 2 view objects using complex SQL for my requirement and variable bindings are necessary for detail view object although I also think a bit strange by myself.

Hi Frank,
Thank you and it can work.
public void setLowHighSalaryRangeForDetailEmployeesAccessorViewObject(Number lowSalary,
                                                                          Number highSalary) {
        Row r = getCurrentRow();
        if (r != null) {
            RowSet rs = (RowSet)r.getAttribute("EmpView");
            if (rs != null) {
                ViewObject accessorVO = rs.getViewObject();
                accessorVO.setNamedWhereClauseParam("LowSalary", lowSalary);
                accessorVO.setNamedWhereClauseParam("HighSalary", highSalary);
            executeQuery();
but I have a quesiton in this way. in code snippet, it is first getting current row of current master VO to determine if update variables value of detail VO. in my case, current row is possibly null after executeQuery() of master VO and I have to change current row manually like below.
any idea?
            DCIteratorBinding dc = (DCIteratorBinding)ADFUtil.evaluateEL("#{bindings.SSForecastSourceBlockView1Iterator}");
            ViewObject vo = dc.getViewObject();
            vo.ensureVariableManager().setVariableValue("DateFrom", dateFrom);
            vo.ensureVariableManager().setVariableValue("DateTo", dateTo);
            vo.ensureVariableManager().setVariableValue("ShiftModeCode", shiftModeC);
            vo.ensureVariableManager().setVariableValue("TerminalCode", terminalCode);
            vo.executeQuery();
            vo.setCurrentRowAtRangeIndex(0);
            ((SSForecastSourceBlockViewImpl)vo).synchornizeAccessorVOVariableValues();

Creating Object views using XSU PL/SQL.Please SEE.

Hi,
I am presently using XSU PL/SQL utility with Oracle 9i and using the
DBMS_XMLQuery.newContext(<My Select clause goes here>,and the
DBMS_XMLQuery.getXML()which generates an XML document.
My query is:
I have 2 tables (One master and the other detail table.).
Table : DI_Master
di_num
00001
Table: DI_Details
di_num di_act
00001 ABCD
00001 ANCF
00001 IOPP
Now the XML I'd like is :
<di_num>00001</di_num>
<di_act>
<val>ABCD</val>
<val>ANCF</val>
<val>IOPP</val>
</di_act>
Do I need to create object tables for this,insert data into object tables
and then read this table? It will become an extremely tedious process
I guess an OBJECT view can do what I want.Can anyone please tell me how
to write an object view for the 2 tables please and the get the output as
desired.?

Supposing you have further
nesting of the tables.Then how will you go about doing that.You can have multiple levels of CURSOR expressions (see an example below, not a real-life example, but illustrates the point).
SQL> set long 4000
SQL> select dbms_xmlquery.getXML('select deptno,' ||
2 'cursor(select empno, cursor(select losal, hisal from salgrade) salgrades '||
3   'from emp e where e.deptno = d.deptno and rownum < 3) EMPLOYEES ' ||
4 'from dept d where d.deptno = 10')
5 FROM DUAL;
DBMS_XMLQUERY.GETXML('SELECTDEPTNO,'||'CURSOR(SELECTEMPNO,CURSOR(SELECTLOSAL,HIS
<?xml version = '1.0'?>
<ROWSET>
   <ROW num="1">
      <DEPTNO>10</DEPTNO>
      <EMPLOYEES>
         <EMPLOYEES_ROW num="1">
            <EMPNO>7782</EMPNO>
            <SALGRADES>
               <SALGRADES_ROW num="1">
                  <LOSAL>700</LOSAL>
                  <HISAL>1200</HISAL>
               </SALGRADES_ROW>
               <SALGRADES_ROW num="2">
                  <LOSAL>1201</LOSAL>
                  <HISAL>1400</HISAL>
               </SALGRADES_ROW>
               <SALGRADES_ROW num="3">
                  <LOSAL>1401</LOSAL>
                  <HISAL>2000</HISAL>
               </SALGRADES_ROW>
               <SALGRADES_ROW num="4">
                  <LOSAL>2001</LOSAL>
                  <HISAL>3000</HISAL>
               </SALGRADES_ROW>
               <SALGRADES_ROW num="5">
                  <LOSAL>3001</LOSAL>
                  <HISAL>9999</HISAL>
               </SALGRADES_ROW>
            </SALGRADES>
         </EMPLOYEES_ROW>
         <EMPLOYEES_ROW num="2">
            <EMPNO>7839</EMPNO>
            <SALGRADES>
               <SALGRADES_ROW num="1">
                  <LOSAL>700</LOSAL>
                  <HISAL>1200</HISAL>
               </SALGRADES_ROW>
               <SALGRADES_ROW num="2">
                  <LOSAL>1201</LOSAL>
                  <HISAL>1400</HISAL>
               </SALGRADES_ROW>
               <SALGRADES_ROW num="3">
                  <LOSAL>1401</LOSAL>
                  <HISAL>2000</HISAL>
               </SALGRADES_ROW>
               <SALGRADES_ROW num="4">
                  <LOSAL>2001</LOSAL>
                  <HISAL>3000</HISAL>
               </SALGRADES_ROW>
               <SALGRADES_ROW num="5">
                  <LOSAL>3001</LOSAL>
                  <HISAL>9999</HISAL>
               </SALGRADES_ROW>
            </SALGRADES>
         </EMPLOYEES_ROW>
      </EMPLOYEES>
   </ROW>
</ROWSET>
1 row selected.
SQL>
Also,isnt it a better option to create a VIEW of the
Select clause and pass a view to the select clause? At the end of the day, you could use whatever you feel comfortable with, provided that it produces your expected output and looks clean. We are just giving you the ideas, how you implement it actually in your situation, depends upon a lot of factors, that only you know about.

Creating objects using reflection

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