improve ilp model

jastadd-mquat-base/src/main/jastadd/solvers/ilp/ILP.ast

-ILP ::= IlpObjective IlpConstraint* IlpBound* IlpVariable* <Info:IlpVarInfo> ;
+ILP ::= IlpObjective IlpConstraint* IlpVariable* ;
 TimedOutILP:ILP ::= <Reason:String> ;
 
 // objective kind is either minimize or maximize
@@ -6,9 +6,7 @@ IlpObjective ::= <Kind:IlpObjectiveKind> IlpLeftHandSide ;
 
 IlpConstraint ::= <Name:String> IlpLeftHandSide <ClauseComparator:ClauseComparator> <RightHandSide:double> ;
 
-IlpBound ::= <Ref:IlpVariable> <Type:IlpBoundType> ;
-
-IlpVariable ::= <Name:String> <Request:Request> <Impl:Implementation> ;
+abstract IlpVariable ::= <Name:String> <Request:Request> <Impl:Implementation> <Illegal:boolean>;
 IlpAllResourcesVariable:IlpVariable ;
 IlpMappingVariable:IlpVariable ::= <Resource:Resource> ;
 

jastadd-mquat-base/src/main/jastadd/solvers/ilp/ILP.jadd

@@ -8,12 +8,6 @@ aspect ILP {
     MAXIMIZE
   }
 
-  public enum IlpBoundType {
-    BINARY,
-    ZERO,
-    GREATER_EQUAL_ZERO
-  }
-
   public class IlpString {
     StringBuilder buffer;
 
@@ -48,12 +42,10 @@ aspect ILP {
   public class IlpVarInfo {
     public java.util.Map<String, IlpVariable> vars;
     public java.util.Map<Resource, IlpConstraint> resourceConstraints;
-    public java.util.Set<IlpVariable> illegal;
 
     public IlpVarInfo() {
       vars = new java.util.TreeMap<>();
       resourceConstraints = new java.util.HashMap<>();
-      illegal = new java.util.HashSet<>();
     }
 
     public IlpVariable getIlpVariable(Request request, Implementation impl, Resource resource) {
@@ -66,22 +58,18 @@ aspect ILP {
         resourceConstraints.put(resource, resourceConstraint);
       }
       if (result == null) {
-        result = new IlpMappingVariable(varName, request, impl, resource);
+        result = new IlpMappingVariable(varName, request, impl, false, resource);
         vars.put(varName, result);
         resourceConstraint.getIlpLeftHandSide().addIlpTerm(new IlpTerm(1, result));
       }
       return result;
     }
 
-    public void setIllegal(Request request, Implementation impl, Resource resource) {
-      illegal.add(getIlpVariable(request, impl, resource));
-    }
-
     public IlpVariable getIlpVariable(Request request, Implementation impl) {
       String varName = request.getIlpName() + "#" + impl.getIlpName();
       IlpVariable result = vars.get(varName);
       if (result == null) {
-        result = new IlpAllResourcesVariable(varName, request, impl);
+        result = new IlpAllResourcesVariable(varName, request, impl, false);
         vars.put(varName, result);
       }
       return result;

jastadd-mquat-base/src/main/jastadd/solvers/ilp/ILP.jrag

@@ -43,7 +43,7 @@ aspect ILP {
    */
   syn ILP Root.getILP() {
     de.tudresden.inf.st.mquat.utils.StopWatch stopWatch = de.tudresden.inf.st.mquat.utils.StopWatch.start();
-//    StopWatch stopWatch = StopWatch.start();
+
     long timeoutValue = (long) de.tudresden.inf.st.mquat.utils.StaticSettings.get(ILP_TIMEOUT_VALUE);
     java.util.concurrent.TimeUnit timeoutUnit = (java.util.concurrent.TimeUnit) de.tudresden.inf.st.mquat.utils.StaticSettings.get(ILP_TIMEOUT_UNIT);
     long timeoutNanos = timeoutUnit.toNanos(timeoutValue);
@@ -81,7 +81,6 @@ aspect ILP {
             olhs.addIlpTerm(term);
             oneImplLhs.addIlpTerm(new IlpTerm(1, var));
           }
-          // 2.3 NFP-Negotiation: Requirements to other components
           for (Clause reqClause : impl.requirementClauses()) {
             if (stopWatch.time() > timeoutNanos) {
               return ilpTimeout("Timeout in NFP-Negotiation");
@@ -102,6 +101,7 @@ aspect ILP {
                 reqLhs.addIlpTerm(new IlpTerm(makeNegative(reqClause.evalUsing(request, resource)),
                     info.getIlpVariable(request, impl, resource)));
               }
+              // 2b. non-functional requirements of required components
               result.addIlpConstraint(new IlpConstraint(
                   request.getIlpName() + "_" + impl.getIlpName() + "_reqs_" +
                       designator.asSoftwareDesignator().getPropertyRef().getRef().getIlpName() + "_from_" +
@@ -111,40 +111,39 @@ aspect ILP {
               for (Resource resource : this.getHardwareModel().getResourceList()) {
                 // check if constraint is fulfilled, otherwise remember this illegal combination
                 if (!reqClause.checkUsing(request, resource)) {
-                  info.setIllegal(request, impl, resource);
+                  info.getIlpVariable(request, impl, resource).setIllegal(true);
                 }
               }
             }
           }
 
-          // 2.2 Architecture constraints: One impl/resource and request
           oneImplLhs.addIlpTerm(new IlpTerm(-1, info.getIlpVariable(request, impl)));
+          // implementation variable definition
           result.addIlpConstraint(new IlpConstraint(request.getIlpName() + "_single_" + impl.getIlpName(),
               oneImplLhs, ClauseComparator.EQ, 0));
-          // 2.3 NFP-Negotiation: Use implementations of required components
           for (ComponentRequirement req : impl.getComponentRequirementList()) {
             IlpLeftHandSide reqImplLhs = new IlpLeftHandSide();
             for (Implementation reqImpl : req.getComponentRef().getRef().getImplementationList()) {
               reqImplLhs.addIlpTerm(new IlpTerm(1, info.getIlpVariable(request, reqImpl)));
             }
             reqImplLhs.addIlpTerm(new IlpTerm(-1, info.getIlpVariable(request, impl)));
+            // 1c. required components
             result.addIlpConstraint(new IlpConstraint(request.getIlpName() + "_" + impl.getIlpName() +
                 "_req_" + req.getComponentRef().getRef().getIlpName(),
                 reqImplLhs, ClauseComparator.GE, 0));
           }
         }
-        // 2.2 Architecture constraints: One impl per component and request
+        // 1b.
         result.addIlpConstraint(new IlpConstraint(request.getIlpName() + "_opc_" + comp.getIlpName(),
             oneCompLhs, ClauseComparator.LE, 1));
       }
-      // 2.1.a Request constraints: Target component (i.e., use one of its implementations)
       IlpLeftHandSide targetLhs = new IlpLeftHandSide();
       for (Implementation impl : request.getTarget().getRef().getImplementationList()) {
         IlpVariable var = info.getIlpVariable(request, impl);
         targetLhs.addIlpTerm(new IlpTerm(1, var));
       }
+      // 1a. functional requirement of the request
       result.addIlpConstraint(new IlpConstraint(request.getIlpName() + "_target", targetLhs, ClauseComparator.EQ, 1));
-      // 2.1.b Request constraints: Required NFPs of target component
       for (Clause requiredClause : request.getConstraintList()) {
         IlpLeftHandSide reqLhs = new IlpLeftHandSide();
         Property requiredProperty = requiredClause.getDesignator().asSoftwareDesignator().getPropertyRef().getRef();
@@ -157,6 +156,7 @@ aspect ILP {
             }
           }
         }
+        // 2a. non-functional requirement of the request
         result.addIlpConstraint(new IlpConstraint(request.getIlpName() + "_req_" + requiredProperty.getIlpName(),
             reqLhs, requiredClause.getClauseComparator(),
             requiredClause.evalUsing(request, null)));
@@ -174,25 +174,30 @@ aspect ILP {
 
     // 2.2 Architecture constraints: Only one config per hardware resource
     for (IlpConstraint constraint : info.resourceConstraints.values()) {
+      // 1d.
       result.addIlpConstraint(constraint);
     }
 
-    // Generals
+    // variables
     for (IlpVariable var : info.vars.values()) {
       result.addIlpVariable(var);
     }
 
-    // Bounds (all binary except illegal which are zero)
-    info.vars.values().removeAll(info.illegal);
-    for (IlpVariable var : info.vars.values()) {
-      // TODO uncomment addIlpBound line. Comment out to not clutter output for the moment.
-      result.addIlpBound(new IlpBound(var, IlpBoundType.BINARY));
+    return result;
+  }
+
+  syn IlpVariable ILP.resolve(String variableName) {
+    return variableMap().get(variableName);
+  }
+
+  syn java.util.Map<String, IlpVariable> ILP.variableMap() {
+    java.util.Map<String, IlpVariable> variableMap = new java.util.HashMap();
+    for (IlpVariable variable : getIlpVariableList()) {
+      if (!variable.getIllegal()) {
+        variableMap.put(variable.getName(), variable);
       }
-    for (IlpVariable var : info.illegal) {
-      result.addIlpBound(new IlpBound(var, IlpBoundType.ZERO));
     }
-    result.setInfo(info);
-    return result;
+    return variableMap;
   }
 
 }

jastadd-mquat-base/src/main/jastadd/solvers/ilp/ILPPrinting.jrag

@@ -7,15 +7,12 @@ aspect ILPPrinting {
     for (IlpConstraint c : getIlpConstraintList()) {
       result.append(c.printIlp()).lb();
     }
-    result.append("Bounds").lb();
-    for (IlpBound b : getIlpBoundList()) {
-      result.append(b.printIlp()).lb();
-    }
-    // TODO check if "Generals" is always correct
-    result.append("Generals").lb();
+    result.append("Binary").lb();
     for (IlpVariable v : getIlpVariableList()) {
+      if (!v.getIllegal()) {
         result.append(v.getName()).append(" ");
       }
+    }
     return result.lb().append("End").lb();
   }
 
@@ -30,7 +27,12 @@ aspect ILPPrinting {
 
   syn IlpString IlpConstraint.printIlp() {
     IlpString result = new IlpString();
-    result.append(getName()).append(": ").append(getIlpLeftHandSide().printIlp()).append(" ");
+    IlpString lhs = getIlpLeftHandSide().printIlp();
+    if (lhs == null) {
+      return result;
+    }
+
+    result.append(getName()).append(": ").append(lhs).append(" ");
     switch (getClauseComparator()) {
       case LT: result.append("<"); break;
       case LE: result.append("<="); break;
@@ -42,20 +44,15 @@ aspect ILPPrinting {
     return result.append(" ").append(getRightHandSide());
   }
 
-  syn IlpString IlpBound.printIlp() {
-    IlpString result = new IlpString();
-    switch(getType()) {
-      case BINARY: result.append("0 <= ").append(getRef().getName()).append(" <= 1"); break;
-      case ZERO: result.append(getRef().getName()).append(" = 0"); break;
-      case GREATER_EQUAL_ZERO: result.append("0 <= ").append(getRef().getName()); break;
-      default: logger.error("Unknown IlpBound type {}", getType().toString());
-    }
-    return result;
-  }
-
   syn IlpString IlpLeftHandSide.printIlp() {
     IlpString result = new IlpString();
+    boolean printed = false;
     for (IlpTerm t : getIlpTermList()) {
+      if (t.getRef().getIllegal()) {
+        continue;
+      } else {
+        printed = true;
+      }
       if (t.getValue() >= 0) {
         result.append(" +");
       } else {
@@ -68,7 +65,11 @@ aspect ILPPrinting {
       }
       result.append(" ").append(t.getRef().getName());
     }
+    if (printed) {
     return result;
+    } else {
+      return null;
+    }
   }
 
 }