code: package org.optsol.project_scheduling.mrcpsp.ctab.constraints;
  
  import com.google.ortools.linearsolver.MPConstraint;
  import com.google.ortools.linearsolver.MPSolver;
  import com.google.ortools.linearsolver.MPVariable;
  import java.util.Collection;
  import java.util.HashSet;
  import java.util.Set;
  import org.optsol.jdecor.core.AbstractVariableManager;
  import org.optsol.jdecor.ortools.AbstractOrtoolsConstraintManager;
  import org.optsol.project_scheduling.mrcpsp.constants.sub.IConstants_B_k;
  import org.optsol.project_scheduling.mrcpsp.constants.sub.IConstants_H_G;
  import org.optsol.project_scheduling.mrcpsp.constants.sub.IConstants_R;
  import org.optsol.project_scheduling.mrcpsp.constants.sub.IConstants_V;
  import org.optsol.project_scheduling.mrcpsp.ctab.variables.DecisionVars_Ctab;
  import org.optsol.project_scheduling.utils.Precedence;
  
  public class CTAB_e_NoOverlapInAssignedCapacityUnits<CONST
      extends IConstants_V & IConstants_B_k & IConstants_R & IConstants_H_G>
      extends AbstractOrtoolsConstraintManager<CONST> {
  
    public CTAB_e_NoOverlapInAssignedCapacityUnits() {
      super("k", "l", "i", "j");
    }
  
    @Override
    protected Collection<ConstraintKey> createKeys(CONST constants) {
      Set<Precedence> transitiveClosure = constants.get_H_G();
      HashSet<ConstraintKey> indexes = new HashSet<>();
      for (int k : constants.get_R()) {
        for (int l : constants.get_B_k_asList(k)) {
          for (int i : constants.get_V()) {
            for (int j : constants.get_V()) {
              if (i < j && !transitiveClosure.contains(new Precedence(i, j))) {
                indexes.add(new ConstraintKey(k, l, i, j));
              }
            }
          }
        }
      }
      return indexes;
    }
  
    @Override
    protected void configureConstraint(
        MPConstraint constraint,
        CONST constants,
        AbstractVariableManager<MPSolver, MPVariable> variables,
        ConstraintKey index) throws Exception {
  
      int k = index.get("k");
      int l = index.get("l");
      int i = index.get("i");
      int j = index.get("j");
  
      constraint.setUb(1.);
  
      constraint.setCoefficient(variables.getVar(DecisionVars_Ctab.r, l, i, k), 1.);
      constraint.setCoefficient(variables.getVar(DecisionVars_Ctab.r, l, j, k), 1.);
      constraint.setCoefficient(variables.getVar(DecisionVars_Ctab.y, i, j), -1.);
      constraint.setCoefficient(variables.getVar(DecisionVars_Ctab.y, j, i), -1.);
    }
  }
  