Examples with EquationSet gov.sandia.n2a.eqset.EquationSet used on opensource projects

Example 6 with EquationSet

use of gov.sandia.n2a.eqset.EquationSet in project n2a by frothga.

the class InternalBackend method analyze.

public static void analyze(EquationSet s) {
    InternalBackendData bed = (InternalBackendData) s.backendData;
    bed.analyze(s);
    for (EquationSet p : s.parts) analyze(p);
    bed.analyzeLastT(s);
}

Example 7 with EquationSet

use of gov.sandia.n2a.eqset.EquationSet in project n2a by frothga.

the class InternalBackendData method analyze.

public void analyze(final EquationSet s) {
    System.out.println(s.name);
    if (s.connectionBindings != null) {
        // Note that populations have already been allocated in the constructor.
        endpoints = countLocalObject;
        countLocalObject += s.connectionBindings.size();
    }
    for (// we want the sub-lists to be ordered correctly
    Variable v : // we want the sub-lists to be ordered correctly
    s.ordered) {
        String className = "null";
        if (v.type != null)
            className = v.type.getClass().getSimpleName();
        System.out.println("  " + v.nameString() + " " + v.attributeString() + " " + className);
        if (v.name.equals("$index"))
            index = v;
        else if (v.name.equals("$init"))
            init = v;
        else if (v.name.equals("$live"))
            live = v;
        else if (v.name.equals("$n") && v.order == 0)
            n = v;
        else if (v.name.equals("$p") && v.order == 0)
            p = v;
        else if (v.name.equals("$type"))
            type = v;
        else if (v.name.equals("$xyz") && v.order == 0)
            xyz = v;
        else if (v.name.equals("$t")) {
            if (v.order == 0)
                t = v;
            else if (v.order == 1)
                dt = v;
        }
        if (v.hasAttribute("global")) {
            v.global = true;
            v.visit(new Visitor() {

                public boolean visit(Operator op) {
                    if (op instanceof AccessVariable) {
                        AccessVariable av = (AccessVariable) op;
                        if (av.reference.resolution.size() > 0)
                            addReferenceGlobal(av.reference, s);
                        return false;
                    }
                    if (op instanceof Output) {
                        Output o = (Output) op;
                        if (o.operands.length < 3) {
                            o.index = countGlobalObject++;
                            namesGlobalObject.add("columnName" + o.index);
                        }
                        // Continue descent, because parameters of output() may contain variable references
                        return true;
                    }
                    return true;
                }
            });
            if (// eliminate non-computed values, unless they refer to a variable outside the immediate equation set
            !v.hasAny(new String[] { "constant", "accessor", "readOnly" }) || v.hasAll(new String[] { "constant", "reference" })) {
                boolean initOnly = v.hasAttribute("initOnly");
                boolean updates = !initOnly && v.equations.size() > 0 && (v.derivative == null || v.hasAttribute("updates"));
                if (updates)
                    globalUpdate.add(v);
                if (v.hasAttribute("reference")) {
                    addReferenceGlobal(v.reference, s);
                } else {
                    boolean temporary = v.hasAttribute("temporary");
                    if (!temporary || v.hasUsers())
                        globalInit.add(v);
                    if (!temporary && !v.hasAttribute("dummy")) {
                        if (!v.hasAttribute("preexistent"))
                            globalMembers.add(v);
                        boolean external = false;
                        if (v.hasAttribute("externalWrite") || v.assignment != Variable.REPLACE) {
                            external = true;
                            globalBufferedExternalWrite.add(v);
                        }
                        if (external || (v.hasAttribute("externalRead") && updates)) {
                            external = true;
                            globalBufferedExternal.add(v);
                        }
                        if (external || v.hasAttribute("cycle")) {
                            globalBuffered.add(v);
                            if (!external) {
                                globalBufferedInternal.add(v);
                                if (!initOnly)
                                    globalBufferedInternalUpdate.add(v);
                            }
                        }
                    }
                }
            }
        } else // local
        {
            v.visit(new Visitor() {

                public boolean visit(Operator op) {
                    if (op instanceof AccessVariable) {
                        AccessVariable av = (AccessVariable) op;
                        if (av.reference.resolution.size() > 0)
                            addReferenceLocal(av.reference, s);
                        return false;
                    }
                    if (op instanceof Output) {
                        Output o = (Output) op;
                        if (o.operands.length < 3) {
                            o.index = countLocalObject++;
                            namesLocalObject.add("columnName" + o.index);
                        }
                        // Continue descent, because parameters of output() may contain variable references
                        return true;
                    }
                    return true;
                }
            });
            if (!v.hasAny(new String[] { "constant", "accessor", "readOnly" }) || v.hasAll(new String[] { "constant", "reference" })) {
                boolean initOnly = v.hasAttribute("initOnly");
                boolean updates = !initOnly && v.equations.size() > 0 && (v.derivative == null || v.hasAttribute("updates"));
                if (updates)
                    localUpdate.add(v);
                if (v.hasAttribute("reference")) {
                    addReferenceLocal(v.reference, s);
                } else {
                    boolean temporary = v.hasAttribute("temporary");
                    if (!temporary || v.hasUsers()) {
                        if (v.name.startsWith("$") || (temporary && v.neededBySpecial())) {
                            if (!v.name.equals("$index") && !v.name.equals("$live"))
                                localInitSpecial.add(v);
                        } else {
                            localInitRegular.add(v);
                        }
                    }
                    if (!temporary && !v.hasAttribute("dummy")) {
                        if (!v.hasAttribute("preexistent"))
                            localMembers.add(v);
                        boolean external = false;
                        if (v.hasAttribute("externalWrite") || v.assignment != Variable.REPLACE) {
                            external = true;
                            localBufferedExternalWrite.add(v);
                        }
                        if (external || (v.hasAttribute("externalRead") && updates)) {
                            external = true;
                            localBufferedExternal.add(v);
                        }
                        if (external || v.hasAttribute("cycle")) {
                            if (v.name.startsWith("$"))
                                localBufferedSpecial.add(v);
                            else
                                localBufferedRegular.add(v);
                            if (// v got here only by being a "cycle", not "externalRead" or "externalWrite"
                            !external) {
                                localBufferedInternal.add(v);
                                if (!initOnly)
                                    localBufferedInternalUpdate.add(v);
                            }
                        }
                    }
                }
            }
        }
    }
    for (// we need these to be in order by differential level, not by dependency
    Variable v : // we need these to be in order by differential level, not by dependency
    s.variables) {
        if (v.derivative != null && !v.hasAny(new String[] { "constant", "initOnly" })) {
            if (v.hasAttribute("global"))
                globalIntegrated.add(v);
            else
                localIntegrated.add(v);
        }
    }
    populationCanGrowOrDie = s.lethalP || s.lethalType || s.canGrow();
    if (n != null) {
        populationCanResize = globalMembers.contains(n);
        // See EquationSet.forceTemporaryStorageForSpecials() for a related issue.
        if (!populationCanResize && populationCanGrowOrDie && n.hasUsers()) {
            Backend.err.get().println("WARNING: $n can change (due to structural dynamics) but it was detected as a constant. Equations that depend on $n may give incorrect results.");
        }
    }
    if (index != null) {
        indexNext = countGlobalFloat++;
        namesGlobalFloat.add("indexNext");
        indexAvailable = countGlobalObject++;
        namesGlobalObject.add("indexAvailable");
    }
    if (// track instances
    s.connected || s.needInstanceTracking || populationCanResize) {
        // The reason populationCanResize forces use of the instances array is to enable pruning of parts when $n decreases.
        instances = countGlobalObject++;
        namesGlobalObject.add("instances");
        if (// in addition, track newly created instances
        s.connected) {
            firstborn = countGlobalFloat++;
            namesGlobalFloat.add("firstborn");
            newborn = countLocalFloat++;
            namesLocalFloat.add("newborn");
        }
    }
    if (p != null) {
        Pdependencies = new ArrayList<Variable>();
        for (Variable t : s.ordered) {
            if (t.hasAttribute("temporary") && p.dependsOn(t) != null) {
                Pdependencies.add(t);
            }
        }
    }
    populationIndex = 0;
    if (// check for null specifically to guard against the Wrapper equation set (which is not fully constructed)
    s.container != null && s.container.parts != null) {
        for (EquationSet p : s.container.parts) {
            if (p == s)
                break;
            populationIndex++;
        }
    }
    if (// connection-specific stuff
    s.connectionBindings != null) {
        int size = s.connectionBindings.size();
        // endpoints is allocated at the top of this function, because it is needed for reference handling in the variable analysis loop
        projectDependencies = new Object[size];
        projectReferences = new Object[size];
        count = new int[size];
        k = new Variable[size];
        max = new Variable[size];
        min = new Variable[size];
        project = new Variable[size];
        radius = new Variable[size];
        for (int i = 0; i < s.connectionBindings.size(); i++) {
            ConnectionBinding c = s.connectionBindings.get(i);
            count[i] = -1;
            k[i] = s.find(new Variable(c.alias + ".$k"));
            max[i] = s.find(new Variable(c.alias + ".$max"));
            min[i] = s.find(new Variable(c.alias + ".$min"));
            project[i] = s.find(new Variable(c.alias + ".$project"));
            radius[i] = s.find(new Variable(c.alias + ".$radius"));
            if (c.endpoint.accountableConnections != null) {
                AccountableConnection query = new AccountableConnection(s, c.alias);
                AccountableConnection ac = c.endpoint.accountableConnections.floor(query);
                if (// Only true if this endpoint is accountable.
                ac.equals(query)) {
                    // Allocate space for counter in target part
                    InternalBackendData endpointBed = (InternalBackendData) c.endpoint.backendData;
                    count[i] = endpointBed.countLocalFloat++;
                    endpointBed.namesLocalFloat.add(s.prefix() + ".$count");
                    if (// $count is referenced explicitly, so need to finish setting it up
                    ac.count != null) {
                        ac.count.readIndex = ac.count.writeIndex = count[i];
                    }
                }
            }
            // Note that countLocalObject has already been incremented above
            namesLocalObject.add(c.alias);
            if (project[i] != null) {
                ArrayList<Variable> dependencies = new ArrayList<Variable>();
                // Always assign, even if empty.
                projectDependencies[i] = dependencies;
                for (Variable t : s.ordered) {
                    if (t.hasAttribute("temporary") && project[i].dependsOn(t) != null) {
                        dependencies.add(t);
                    }
                }
                final TreeSet<VariableReference> references = new TreeSet<VariableReference>(referenceComparator);
                class ProjectVisitor extends Visitor {

                    public boolean visit(Operator op) {
                        if (op instanceof AccessVariable) {
                            AccessVariable av = (AccessVariable) op;
                            if (av.reference.resolution.size() > 0)
                                references.add(av.reference);
                            return false;
                        }
                        return true;
                    }
                }
                ProjectVisitor visitor = new ProjectVisitor();
                project[i].visit(visitor);
                for (Variable v : dependencies) v.visit(visitor);
                if (references.size() > 0)
                    projectReferences[i] = references;
            }
            c.resolution = translateResolution(c.resolution, s);
        }
    }
    // Locals
    for (Variable v : localMembers) {
        // in the type array rather than the float array.
        if (v.type instanceof Scalar && v.reference.variable == v) {
            v.readIndex = v.writeIndex = countLocalFloat++;
            namesLocalFloat.add(v.nameString());
        } else {
            v.readIndex = v.writeIndex = countLocalObject++;
            namesLocalObject.add(v.nameString());
        }
    }
    for (Variable v : localBufferedExternal) {
        if (v.type instanceof Scalar && v.reference.variable == v) {
            v.writeIndex = countLocalFloat++;
            namesLocalFloat.add("next_" + v.nameString());
        } else {
            v.writeIndex = countLocalObject++;
            namesLocalObject.add("next_" + v.nameString());
        }
    }
    for (Variable v : localBufferedInternal) {
        v.writeTemp = true;
        if (v.type instanceof Scalar && v.reference.variable == v) {
            v.writeIndex = countLocalTempFloat++;
            namesLocalTempFloat.add("next_" + v.nameString());
        } else {
            v.writeIndex = countLocalTempObject++;
            namesLocalTempObject.add("next_" + v.nameString());
        }
    }
    // Globals
    for (Variable v : globalMembers) {
        if (v.type instanceof Scalar && v.reference.variable == v) {
            v.readIndex = v.writeIndex = countGlobalFloat++;
            namesGlobalFloat.add(v.nameString());
        } else {
            v.readIndex = v.writeIndex = countGlobalObject++;
            namesGlobalObject.add(v.nameString());
        }
    }
    for (Variable v : globalBufferedExternal) {
        if (v.type instanceof Scalar && v.reference.variable == v) {
            v.writeIndex = countGlobalFloat++;
            namesGlobalFloat.add("next_" + v.nameString());
        } else {
            v.writeIndex = countGlobalObject++;
            namesGlobalObject.add("next_" + v.nameString());
        }
    }
    for (Variable v : globalBufferedInternal) {
        v.writeTemp = true;
        if (v.type instanceof Scalar && v.reference.variable == v) {
            v.writeIndex = countGlobalTempFloat++;
            namesGlobalTempFloat.add("next_" + v.nameString());
        } else {
            v.writeIndex = countGlobalTempObject++;
            namesGlobalTempObject.add("next_" + v.nameString());
        }
    }
    // fully temporary values
    for (Variable v : s.variables) {
        if (!v.hasAttribute("temporary"))
            continue;
        v.readTemp = v.writeTemp = true;
        if (v.hasAttribute("global")) {
            if (v.type instanceof Scalar && v.reference.variable == v) {
                v.readIndex = v.writeIndex = countGlobalTempFloat++;
                namesGlobalTempFloat.add(v.nameString());
            } else {
                v.readIndex = v.writeIndex = countGlobalTempObject++;
                namesGlobalTempObject.add(v.nameString());
            }
        } else {
            if (v.type instanceof Scalar && v.reference.variable == v) {
                v.readIndex = v.writeIndex = countLocalTempFloat++;
                namesLocalTempFloat.add(v.nameString());
            } else {
                v.readIndex = v.writeIndex = countLocalTempObject++;
                namesLocalTempObject.add(v.nameString());
            }
        }
    }
    if (live.hasAttribute("constant"))
        liveStorage = LIVE_CONSTANT;
    else if (live.hasAttribute("accessor"))
        liveStorage = LIVE_ACCESSOR;
    else
        // $live is "initOnly"
        liveStorage = LIVE_STORED;
    for (VariableReference r : localReference) r.resolution = translateResolution(r.resolution, s);
    for (VariableReference r : globalReference) r.resolution = translateResolution(r.resolution, s);
    // Type conversions
    String[] forbiddenAttributes = new String[] { "global", "constant", "accessor", "reference", "temporary", "dummy", "preexistent" };
    for (EquationSet target : s.getConversionTargets()) {
        if (s.connectionBindings == null) {
            if (target.connectionBindings != null)
                throw new EvaluationException("Can't change $type from compartment to connection.");
        } else {
            if (target.connectionBindings == null)
                throw new EvaluationException("Can't change $type from connection to compartment.");
        }
        Conversion conversion = new Conversion();
        conversions.put(target, conversion);
        // Match variables
        for (Variable v : target.variables) {
            if (v.name.equals("$type"))
                continue;
            if (v.hasAny(forbiddenAttributes))
                continue;
            Variable v2 = s.find(v);
            if (v2 != null && v2.equals(v)) {
                conversion.to.add(v);
                conversion.from.add(v2);
            }
        }
        // Match connection bindings
        if (// Since we checked above, we know that target is also a connection.
        s.connectionBindings != null) {
            conversion.bindings = new int[s.connectionBindings.size()];
            int i = 0;
            for (ConnectionBinding c : s.connectionBindings) {
                conversion.bindings[i] = -1;
                int j = 0;
                for (ConnectionBinding d : target.connectionBindings) {
                    if (c.alias.equals(d.alias)) {
                        conversion.bindings[i] = j;
                        break;
                    }
                    j++;
                }
                // Note: ALL bindings must match. There is no other mechanism for initializing the endpoints.
                if (conversion.bindings[i] < 0)
                    throw new EvaluationException("Unfulfilled connection binding during $type change.");
                i++;
            }
        }
    // TODO: Match populations?
    // Currently, any contained populations do not carry over to new instance. Instead, it must create them from scratch.
    }
}

Example 8 with EquationSet

use of gov.sandia.n2a.eqset.EquationSet in project n2a by frothga.

the class InternalBackendData method analyzeLastT.

/**
 *        Determine if time of last integration must be stored.
 *        Note: global (population) variables are integrated at same time as container using its dt value.
 *        Thus, we only handle local variables here.
 */
public void analyzeLastT(EquationSet s) {
    boolean hasIntegrated = localIntegrated.size() > 0;
    for (EquationSet p : s.parts) {
        if (hasIntegrated)
            break;
        hasIntegrated = ((InternalBackendData) p.backendData).globalIntegrated.size() > 0;
    }
    boolean dtCanChange = dt != null && dt.equations.size() > 0 && !dt.hasAttribute("initOnly");
    if (hasIntegrated && (eventTargets.size() > 0 || dtCanChange)) {
        lastT = new Variable("$lastT");
        lastT.readIndex = lastT.writeIndex = countLocalFloat++;
        namesLocalFloat.add(lastT.nameString());
        lastT.type = new Scalar(0);
    }
}

Example 9 with EquationSet

use of gov.sandia.n2a.eqset.EquationSet in project n2a by frothga.

the class InternalBackendData method analyzeEvents.

public static void analyzeEvents(final EquationSet s, final List<EventTarget> eventTargets, final List<Variable> eventReferences) {
    class EventVisitor extends Visitor {

        public boolean found;

        public boolean visit(Operator op) {
            if (op instanceof Event) {
                found = true;
                Event de = (Event) op;
                if (// this event has not yet been analyzed
                de.eventType == null) {
                    final EventTarget et = new EventTarget(de);
                    int targetIndex = eventTargets.indexOf(et);
                    if (// event target already exists
                    targetIndex >= 0) {
                        de.eventType = eventTargets.get(targetIndex);
                    } else // we must create a new event target, or more properly, fill in the event target we just used as a query object
                    {
                        // Create an entry and save the index
                        targetIndex = eventTargets.size();
                        eventTargets.add(et);
                        de.eventType = et;
                        et.container = s;
                        // Determine edge type
                        if (de.operands.length < 3) {
                            et.edge = EventTarget.RISE;
                        } else if (de.operands[2] instanceof Constant) {
                            Constant c = (Constant) de.operands[2];
                            if (c.value instanceof Text) {
                                Text t = (Text) c.value;
                                if (t.value.equalsIgnoreCase("nonzero"))
                                    et.edge = EventTarget.NONZERO;
                                else if (t.value.equalsIgnoreCase("change"))
                                    et.edge = EventTarget.CHANGE;
                                else if (t.value.equalsIgnoreCase("fall"))
                                    et.edge = EventTarget.FALL;
                                else
                                    et.edge = EventTarget.RISE;
                            } else {
                                Backend.err.get().println("ERROR: event() edge type must be a string.");
                                throw new Backend.AbortRun();
                            }
                        } else {
                            Backend.err.get().println("ERROR: event() edge type must be constant.");
                            throw new Backend.AbortRun();
                        }
                        // Allocate auxiliary variable
                        if (de.operands[0] instanceof AccessVariable) {
                            AccessVariable av = (AccessVariable) de.operands[0];
                            VariableReference reference = av.reference;
                            Variable v = reference.variable;
                            // then the user has broken the rule that we can't see temporaries in other parts.
                            if (v.hasAttribute("temporary") && v.container != s) {
                                Backend.err.get().println("WARNING: Cannot be temporary due to event monitor: " + v.container.name + "." + v.nameString() + " from " + s.name);
                                v.removeAttribute("temporary");
                            }
                            // so fall through to the !trackOne case below.
                            if (!v.hasAttribute("temporary")) {
                                // ensure it's buffered, so we can detect change
                                v.addAttribute("externalRead");
                                et.trackOne = true;
                                // just a holder for the reference
                                et.track = new Variable();
                                et.track.reference = reference;
                            }
                        }
                        if (// Expression, so create auxiliary variable. Aux not needed for NONZERO, because no change detection.
                        !et.trackOne && et.edge != EventTarget.NONZERO) {
                            et.track = new Variable("eventAux" + targetIndex, 0);
                            et.track.type = new Scalar(0);
                            et.track.reference = new VariableReference();
                            et.track.reference.variable = et.track;
                        }
                        // Locate any temporaries for evaluation. TODO: for more efficiency, we could have separate lists of temporaries for the condition and delay operands
                        // Tie into the dependency graph using a phantom variable (which can go away afterward without damaging the graph).
                        final Variable phantom = new Variable("event");
                        phantom.uses = new IdentityHashMap<Variable, Integer>();
                        for (int i = 0; i < et.event.operands.length; i++) et.event.operands[i].visit(new Visitor() {

                            public boolean visit(Operator op) {
                                if (op instanceof AccessVariable) {
                                    AccessVariable av = (AccessVariable) op;
                                    Variable v = av.reference.variable;
                                    if (!phantom.uses.containsKey(v))
                                        phantom.uses.put(v, 1);
                                    return false;
                                }
                                return true;
                            }
                        });
                        // Scan all variables in equation set to see if we need them
                        for (Variable t : s.variables) {
                            if (t.hasAttribute("temporary") && phantom.dependsOn(t) != null)
                                et.dependencies.add(t);
                        }
                        // Note the default is already set to -1 (no care)
                        class DelayVisitor extends Visitor {

                            TreeSet<EquationSet> containers = new TreeSet<EquationSet>();

                            public boolean visit(Operator op) {
                                if (op instanceof AccessVariable) {
                                    AccessVariable av = (AccessVariable) op;
                                    // could include the target part itself, if in fact we use local variables
                                    containers.add(av.reference.variable.container);
                                    return false;
                                }
                                return true;
                            }
                        }
                        DelayVisitor dv = new DelayVisitor();
                        if (de.operands.length >= 2) {
                            if (de.operands[1] instanceof Constant) {
                                Constant c = (Constant) de.operands[1];
                                et.delay = (float) ((Scalar) c.value).value;
                                if (et.delay < 0)
                                    et.delay = -1;
                            } else {
                                // indicates that we need to evaluate delay at run time
                                et.delay = -2;
                                de.operands[1].visit(dv);
                            }
                        }
                        // Set up monitors in source parts
                        class ConditionVisitor extends Visitor {

                            TreeSet<EquationSet> containers = new TreeSet<EquationSet>();

                            public boolean visit(Operator op) {
                                if (op instanceof AccessVariable) {
                                    AccessVariable av = (AccessVariable) op;
                                    Variable v = av.reference.variable;
                                    EquationSet sourceContainer = v.container;
                                    containers.add(sourceContainer);
                                    // Set up monitors for values that can vary during update.
                                    if (!v.hasAttribute("constant") && !v.hasAttribute("initOnly") && !et.monitors(sourceContainer)) {
                                        EventSource es = new EventSource(sourceContainer, et);
                                        // null means self-reference, a special case handled in Part
                                        if (sourceContainer != s)
                                            es.reference = av.reference;
                                        et.sources.add(es);
                                    }
                                    return false;
                                }
                                return true;
                            }
                        }
                        ConditionVisitor cv = new ConditionVisitor();
                        de.operands[0].visit(cv);
                        // Special case for event with no references that vary
                        if (et.sources.isEmpty()) {
                            // We can avoid creating a self monitor if we know for certain that the event will never fire
                            boolean neverFires = false;
                            if (de.operands[0] instanceof Constant) {
                                if (et.edge == EventTarget.NONZERO) {
                                    Type op0 = ((Constant) de.operands[0]).value;
                                    if (op0 instanceof Scalar) {
                                        neverFires = ((Scalar) op0).value == 0;
                                    } else {
                                        Backend.err.get().println("ERROR: Condition for event() must resolve to a number.");
                                        throw new Backend.AbortRun();
                                    }
                                } else {
                                    neverFires = true;
                                }
                            }
                            if (!neverFires) {
                                EventSource es = new EventSource(s, et);
                                // This is a self-reference, so es.reference should be null.
                                et.sources.add(es);
                            }
                        }
                        // Determine if monitor needs to test every target, or if one representative target is sufficient
                        for (EventSource source : et.sources) {
                            // associated with any given source instance, so every target must be evaluated separately.
                            if (cv.containers.size() > 1)
                                source.testEach = true;
                            if (dv.containers.size() > 1 || (dv.containers.size() == 1 && dv.containers.first() != source.container))
                                source.delayEach = true;
                        }
                    }
                }
            }
            return true;
        }
    }
    EventVisitor eventVisitor = new EventVisitor();
    for (Variable v : s.variables) {
        eventVisitor.found = false;
        v.visit(eventVisitor);
        if ((eventVisitor.found || v.dependsOnEvent()) && v.reference.variable != v)
            eventReferences.add(v);
    }
}

Example 10 with EquationSet

use of gov.sandia.n2a.eqset.EquationSet in project n2a by frothga.

the class InternalBackendData method translateResolution.

/**
 *         Convert resolution to a form that can be processed quickly at runtime.
 */
public ArrayList<Object> translateResolution(ArrayList<Object> resolution, EquationSet current) {
    ArrayList<Object> newResolution = new ArrayList<Object>();
    Iterator<Object> it = resolution.iterator();
    while (it.hasNext()) {
        Object o = it.next();
        if (// We are following the containment hierarchy.
        o instanceof EquationSet) {
            EquationSet next = (EquationSet) o;
            if (// ascend to our container
            next == current.container) {
                newResolution.add(new ResolveContainer());
            } else // descend to one of our contained populations
            {
                int i = 0;
                for (EquationSet p : current.parts) {
                    if (p == next) {
                        newResolution.add(new ResolvePart(i));
                        break;
                    }
                    i++;
                }
                if (i >= current.parts.size())
                    throw new EvaluationException("Could not find connection target.");
            }
            current = next;
        } else if (// We are following a part reference, which means "current" is a connection.
        o instanceof ConnectionBinding) {
            ConnectionBinding c = (ConnectionBinding) o;
            InternalBackendData bed = (InternalBackendData) current.backendData;
            newResolution.add(new ResolvePart(bed.endpoints + c.index));
            current = c.endpoint;
        }
    }
    return newResolution;
}