Originally posted by: Rommelds

I'm programming in Java language...

Firstly, I defined the model with IloOplModelSource modelSource = oplF.createOplModelSource(DATADIR + "/model.mod") and then created the model using IloOplModel opl=oplF.createOplModel(def,cplex).

But, I want to access the values os the decision variables. It is defined as var[a][b][c].

How can I do it?

Thanks.

Rommel.
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#DecisionOptimization

Originally posted by: SystemAdmin

I would suggest you to go through the Iterators.java example (located in the <CPLEX_StudioXXX>\opl\examples\opl_interfaces\java\iterators\src\iterators directory). It has a method called 'sample2' which talks about retrieving values of a 2D variable called "x" indexed over "s1" and "s2". You will need to extend this idea to retrieve the values of your 3D "var" variable. Here's a code snippet from the sample:

IloOplFactory oplF = 

new IloOplFactory();   IloOplRunConfiguration rc = oplF.createOplRunConfiguration(DATADIR + 
"/iterators.mod"); IloOplModel opl = rc.getOplModel(); opl.generate();   
// Get the x, s1 and s2 elements from the OplModel. IloIntMap x = opl.getElement(
"x").asIntMap(); IloSymbolSet s1 = opl.getElement(
"s1").asSymbolSet(); IloSymbolSet s2 = opl.getElement(
"s2").asSymbolSet();   
// Iterate on the first indexer. 

for (java.util.Iterator it1 = s1.iterator(); it1.hasNext();) 
{ String sub1 = (String) it1.next(); 
// Get the 2nd dimension array from the 1st dimension. IloIntMap sub = x.getSub(sub1); 
// Iterate on the second indexer of x (that is the indexer of the 
// sub array). 

for (java.util.Iterator it2 = s2.iterator(); it2.hasNext();) 
{ String sub2 = (String) it2.next(); 
// We are in the last dimension of the array, so we can directly 
// use the get method. System.out.println(sub1 + 
" " + sub2 + 
" " + sub.get(sub2)); 
} 
}

Ofcourse, in your case, you should retrieve the values after the 'solve' call.
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#DecisionOptimization

Originally posted by: Rommelds

I've seen it.

But, how do I use the Iterator with integer types?
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Originally posted by: Rommelds

Or with range types, in this case.
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Originally posted by: SystemAdmin

Yes, in the sample, the iterator goes over a string set. For integer ranges, you will need to map the indexes as asIntRange(). Here's a code snippet to do the same:

IloIntMap var = opl.getElement("var").asIntMap();
                IloIntRange i = opl.getElement("a").asIntRange();
                IloIntRange j = opl.getElement("b").asIntRange();
                IloIntRange k = opl.getElement("c").asIntRange();
        
                for (java.util.Iterator it1 = i.iterator(); it1.hasNext();) {
                    Integer sub1 = (Integer)it1.next();
                    IloIntMap sub1M = var.getSub(sub1);
                    for (java.util.Iterator it2 = j.iterator(); it2.hasNext();) {
                        Integer sub2 = (Integer) it2.next();
                        IloIntMap sub2M = sub1M.getSub(sub2);
                        for (java.util.Iterator it3 = k.iterator(); it3.hasNext();) {
                                Integer sub3 = (Integer) it3.next();
                                System.out.println("var["+sub1 + "][" + sub2 + "][" + sub3+ "]="+ sub2M.get(sub3));
                        }
                    }
                }

Hope this helps.
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#DecisionOptimization

Originally posted by: Rommelds

Oh man, thanks.

Problem solved :-)
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