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POHow to access ilog decision variable from java?
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  1. POHow to access ilog decision variable from java?
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    copied!<p>I have a linear problem modelled in IBM ILOG CPLEX Optimization Studio, that returns correct solutions, i.e. objective values. For simulation purposes I use an ILOG model model file and a data file that I both call from java:</p> <pre><code>IloOplFactory.setDebugMode(false); IloOplFactory oplF = new IloOplFactory(); IloOplErrorHandler errHandler = oplF.createOplErrorHandler(System.out); IloOplModelSource modelSource = oplF.createOplModelSource("CDA_Welfare_Examination_sparse2.mod"); IloCplex cplex = oplF.createCplex(); IloOplSettings settings = oplF.createOplSettings(errHandler); IloOplModelDefinition def=oplF.createOplModelDefinition(modelSource,settings); IloOplModel opl=oplF.createOplModel(def,cplex); String inDataFile = path; IloOplDataSource dataSource=oplF.createOplDataSource(inDataFile); opl.addDataSource(dataSource); opl.generate(); opl.convertAllIntVars(); // converts integer bounds into LP compatible format if (cplex.solve()){ } else{ System.out.println("Solution could not be achieved, probably insufficient memory or some other weird problem."); } </code></pre> <p>Now, I would like to access the actual decision variable match[Matchable] from java.</p> <p>In ILOG CPLEX Optimization Studio I use the following nomenclatura:</p> <pre><code>tuple bidAsk{ int b; int a; } {bidAsk} Matchable = ...; dvar float match[Matchable]; </code></pre> <p>In Java I access the objective value in the following way (which works fine):</p> <pre><code>double sol = new Double(opl.getSolutionGetter().getObjValue()); </code></pre> <p>Now, how do I access the decision variable "match"? So far I have started with</p> <pre><code>IloOplElement dVarMatch = opl.getElement("match"); </code></pre> <p>but I can't seem to get any further. Help is very much appreciated! Thanks a lot!</p>
 

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