1 package org.simantics.structural2.scl;
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3 import org.simantics.databoard.Bindings;
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4 import org.simantics.db.ReadGraph;
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5 import org.simantics.db.Resource;
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6 import org.simantics.db.common.procedure.adapter.TransientCacheListener;
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7 import org.simantics.db.common.request.IndexRoot;
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8 import org.simantics.db.exception.DatabaseException;
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9 import org.simantics.db.layer0.variable.Variable;
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10 import org.simantics.layer0.Layer0;
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11 import org.simantics.scl.runtime.SCLContext;
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12 import org.simantics.scl.runtime.function.Function1;
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15 * Compiles an SCL expression that is attached to a literal
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16 * whose parent is a component that is a part of a component type.
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18 * @author Hannu Niemistö
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20 public class CompileStructuralValueRequest extends AbstractCompileStructuralValueRequest {
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22 protected final Resource component;
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23 protected final Resource literal;
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25 public CompileStructuralValueRequest(Resource component, Resource literal, Resource relation) {
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27 this.component = component;
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28 this.literal = literal;
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31 public CompileStructuralValueRequest(ReadGraph graph, Variable context) throws DatabaseException {
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32 this(context.getParent(graph).getRepresents(graph),
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33 context.getRepresents(graph),
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34 context.getPredicateResource(graph));
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37 public static Object compileAndEvaluate(ReadGraph graph, Variable context) throws DatabaseException {
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38 SCLContext sclContext = SCLContext.getCurrent();
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39 Object oldGraph = sclContext.get("graph");
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40 CompileStructuralValueRequest request = new CompileStructuralValueRequest(graph, context);
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42 Function1<Variable,Object> exp = graph.syncRequest(request, TransientCacheListener.<Function1<Variable,Object>>instance());
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43 sclContext.put("graph", graph);
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44 return exp.apply(context);
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45 } catch (Throwable t) {
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46 throw new DatabaseException("Compiling structural value request for component=" + request.component + ", literal=" + request.literal + " and relation " + request.relation + " failed!", t);
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48 sclContext.put("graph", oldGraph);
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53 protected String getExpressionText(ReadGraph graph)
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54 throws DatabaseException {
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55 Layer0 L0 = Layer0.getInstance(graph);
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56 return graph.getRelatedValue(literal, L0.SCLValue_expression, Bindings.STRING);
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60 protected Resource getIndexRoot(ReadGraph graph) throws DatabaseException {
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61 return graph.syncRequest(new IndexRoot(literal));
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65 protected Resource getComponentType(ReadGraph graph)
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66 throws DatabaseException {
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67 // This is possible e.g. for interface expressions inside procedurals
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68 if(component == null) return null;
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69 return graph.syncRequest(new FindPossibleComponentTypeRequest(component));
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73 public int hashCode() {
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74 final int prime = 31;
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76 result = prime * result + ((component == null) ? 0 : component.hashCode());
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77 result = prime * result + ((literal == null) ? 0 : literal.hashCode());
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82 public boolean equals(Object obj) {
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87 if (getClass() != obj.getClass())
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89 CompileStructuralValueRequest other = (CompileStructuralValueRequest) obj;
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90 if (component == null) {
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91 if (other.component != null)
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93 } else if (!component.equals(other.component))
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95 if (literal == null) {
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96 if (other.literal != null)
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98 } else if (!literal.equals(other.literal))
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