Exploring AW (analytic workspace) in Java

Question

Hello,
I am creating a java program that can retrive data from analytic workspace that is also built with java program, but I don't know how, so I have a couple of questions for those that can help me.
1. Is there anyway that I can insert data into aw dimension with java program?
2. If not how can I map existing tables within Database with analytic workspace dimension?
3. Is there any posibility to connect to aw dimension with MdmDimension class and retrive data with that class ?
4. Can anyone provide any example programs on this?
5. Can anyone provide me a simple example how to explore data within the analytic workspace in Java. I want to retrive data from aw cube or dimension if it is posible.
I appreciate any help,
Thanks

Answer 1

Have you considered using the BI Beans? Just a thought...
Regarding your questions, 1 and 2 are probably best addressed with the OLAP Analytic Workspace API (a.k.a. AW/XML). You might want to take a look at the Javadoc. You can find the latest Oracle OLAP documentation at the following OTN site:
http://www.oracle.com/technology/products/bi/olap/olap.html
As for the other questions, here is some help from an OLAP API developer:
3. Is there any possibility to connect to AW dimension with MdmDimension class and retrieve data with that class?
The simple answer is no. The OLAP API divides functionality into metadata and data. The Mdm and Mtm classes deal with metadata. These classes represent the relationships between AW objects. The Source and Cursor classes deal with data. They are used to define queries and retrieve data. But the getSource() method can be used on just about any Mdm object to get a Source.
4. Can anyone provide any example programs on this?
The "Developer's Guide to the OLAP API" has a lot of examples. But here's a brief example of getting the member IDs of a dimension.
// given objects
DataProvider dp;
MdmPrimaryDimension dimObj;
// we will commonly work with hierarchies rather than dimensions
MdmHierarchy hierObj = dimObj.getDefaultHierarchy();
// get the Source for the hierarchy
Source hier = hierObj.getSource();
// get a Cursor
CursorManagerSpecification cursorManagerSpec =
dp.createCursorManagerSpecification(hier);
SpecifiedCursorManager cursorManager =
dp.createCursorManager(cursorManagerSpec);
Cursor cursor = cursorManager.createCursor();
// retrieve the values
do {
System.out.println(((ValueCursor) cursor).getCurrentValue());
} while (cursor.next());
5. Can anyone provide me a simple example how to explore data within the analytic workspace in Java. I want to retrieve data from AW cube or dimension if it is possible.
The preceding is one example of exploring data from a hierarchy. Getting data from a dimension is nearly identical -- don't call getDefaultHierarchy(), and call getSource() on dimObj. Getting data from a cube is a little more involved. Again, there are excellent
examples in the documentation, but here's a brief one:
// Given objects
DataProvider dp;
TransactionProvider tp;
MdmMeasure salesObj; // dimensioned by customer and time for this example
MdmHierarchy customerHier;
MdmHierarchy timeHier;
// Get Sources
Source sales = salesObj.getSource();
Source customer = customerHier.getSource();
Source time = timeHier.getSource();
// Create the query. We must join the measure to its dimensions.
Source query = sales.join(customer).join(time);
// We have created a new Source, so we need to commit the OLAP API
transaction.
tp.prepareCurrentTransaction();
tp.commitCurrentTransaction();
// Create the Cursor. This Cursor has a more complex shape because the query is more complex.
CursorManagerSpecification cursorManagerSpec =
dp.createCursorManagerSpecification(hier);
SpecifiedCursorManager cursorManager =
dp.createCursorManager(cursorManagerSpec);
CompoundCursor cursor = (CompoundCursor) cursorManager.createCursor();
// retrieve the values
do {
Iterator iter = (cursor.getOutputs().iterator();
boolean first = true;
while (iter.hasNext()) {
if (!first)
System.out.print(", ");
System.out.print(((ValueCursor) iter.next()).getCurrentValue());
first = false;
System.out.print(": ");
System.out.println(cursor.getValueCursor().getCurrentValue());
} while (cursor.next());
Hope this is helpful.