Oracle ADF | Techartifact

April 28, 2009May 11, 2009

Autoboxing In java

Automatic conversion of primitive types and their corresponding object wrapper classes (eg, int and Integer, double and Double, etc).
Autoboxing is a new feature java 1.5 . It is a capability to convert or cast between object wrapper and it’s primitive type.it was necessary to wrap a primitive type to a Wrapper class before adding it to a collection i.e is called Boxing and to unwrap it back to the primitive when it came out of the collection i.e unboxing.

Auto-boxing and Auto-Unboxing enables the primitive types to be converted into respective wrapper objects and the other way around.
Before jdk 1.5 we need to manual boxing.We have to write tedious coding for that.

example-
Integer vinay();
…
int i = vinay();

Difference between autoboxing and Casting–

Boxing – Boxing is when you use or make primitive type to a reference type
Casting – Casting is when you want one type to treated as another type, between primitive types and reference types

April 22, 2009June 4, 2009

Procedure calling in Oracle ADF

In Oracle Adf we will doing DML operation by calling the Procedure.Here the syntax of calling
Stored procedure is as follow:

Here Procedure name is --  Vinayprocedure(empno,job,name)

StoredProcedureCall call = new StoredProcedureCall();
call.setProcedureName("Vinayprocedure");
call.addUnamedArgument("empno");
call.addUnamedInOutputArgument("job", "job", String.class);
call.addUnamedOutputArgument("name");

DataModifyQuery query = new DataModifyQuery();
query.setCall(call);
query.addArgument("empno");
query.addArgument("job");
query.addArgument("name");

session.addQuery("Vinayprocedure ", query);

Vector parameters = new Vector();
parameters.addElement(new Integer(7369));
parameters.addElement("engineer");
parameters.addElement("Vinay");
Object data = session.executeQuery(query, parameters);

When we are calling data from some view object, we can use this code  :-
VinayViewObject1Iterator= view object iterator.

StoredProcedureCall call = new StoredProcedureCall();
call.setProcedureName("Vinayprocedure2");
call.addNamedArgument("empno");
call.addNamedArgument("job");
call.addNamedArgument("name");

DataModifyQuery query = new DataModifyQuery();
query.setCall(call);
query.addArgument("empno");
query.addArgument("job");
query.addArgument("name");
Vector parameters = new Vector();

DCIteratorBinding iteratorobject= findIterator("VinayViewObject1Iterator");
RowSetIterator rowObject = iteratorobject.getRowSetIterator();
rowObject.setRangeSize(rowObject.getRowCount());
RowKeySet keysetobject = this.getTable().getSelectionState();
Set keySetobject = keysetobject.getKeySet();
Iterator itrobject = keysetobject.iterator();

while (itrobject.hasNext()) {
Integer intr = (Integer)itr.next();
VinayViewObjectRowImpl row =
(VinayViewObjectRowImpl)keysetobject.getRowAtRangeIndex(intr.intValue());
parameters.addElement(row.getAttribute(“empno));                       parameters.addElement(row.getAttribute(“job”));
parameters.addElement(row.getAttribute(“name”));

session.addQuery("Vinayprocedure2", query);
Object data = session.executeQuery(query, parameters);

parameters.clear();

Tag: Oracle ADF

Autoboxing In java

Procedure calling in Oracle ADF

Scroll bar in oracle ADF