1 package org.simantics.structural2.scl;
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3 import org.simantics.db.ReadGraph;
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4 import org.simantics.db.Resource;
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5 import org.simantics.db.common.procedure.adapter.TransientCacheListener;
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6 import org.simantics.db.exception.DatabaseException;
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7 import org.simantics.db.layer0.variable.Variable;
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8 import org.simantics.scl.runtime.SCLContext;
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9 import org.simantics.scl.runtime.function.Function1;
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11 public class CompileProceduralExpressionValueRequest extends AbstractCompileStructuralValueRequest {
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13 protected final String expression;
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14 protected final Resource componentType;
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15 protected final Resource indexRoot;
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17 public CompileProceduralExpressionValueRequest(String expression, Resource componentType, Resource relation, Resource indexRoot) {
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19 this.expression = expression;
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20 this.componentType = componentType;
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21 this.indexRoot = indexRoot;
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24 public CompileProceduralExpressionValueRequest(ReadGraph graph, String expression, Variable context) throws DatabaseException {
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25 this(expression, context.getParent(graph).getType(graph),
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26 context.getPredicateResource(graph),
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27 context.getIndexRoot(graph));
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30 public static Object compileAndEvaluate(ReadGraph graph, String expression, Variable context) throws DatabaseException {
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31 SCLContext sclContext = SCLContext.getCurrent();
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32 Object oldGraph = sclContext.get("graph");
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34 Function1<Variable,Object> exp = graph.syncRequest(new CompileProceduralExpressionValueRequest(graph, expression, context),
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35 TransientCacheListener.<Function1<Variable,Object>>instance());
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36 sclContext.put("graph", graph);
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37 return exp.apply(context);
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38 } catch (DatabaseException e) {
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39 throw (DatabaseException)e;
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40 } catch (Throwable t) {
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41 throw new DatabaseException(t);
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43 sclContext.put("graph", oldGraph);
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48 protected String getExpressionText(ReadGraph graph) throws DatabaseException {
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53 protected Resource getIndexRoot(ReadGraph graph) throws DatabaseException {
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58 protected Resource getComponentType(ReadGraph graph) throws DatabaseException {
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59 return componentType;
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