1 package org.simantics.document.server.request;
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3 import org.simantics.db.ReadGraph;
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4 import org.simantics.db.exception.DatabaseException;
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5 import org.simantics.db.layer0.variable.Variable;
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6 import org.simantics.db.layer0.variable.Variables;
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7 import org.simantics.db.request.Read;
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8 import org.simantics.document.server.handler.AbstractEventHandler;
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9 import org.simantics.document.server.io.CommandContext;
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10 import org.simantics.structural.stubs.StructuralResource2;
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12 public class HandleEventRequest implements Read<AbstractEventHandler> {
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16 public HandleEventRequest(String id) {
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21 public AbstractEventHandler perform(ReadGraph graph) throws DatabaseException {
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23 StructuralResource2.getInstance(graph);
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25 Variable variable = Variables.getPossibleVariable(graph, id);
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26 if(variable == null) return null;
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28 // System.err.println("EVENT " + variable.getURI(graph));
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29 Object handler = variable.getValue(graph);
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30 if(handler instanceof AbstractEventHandler)
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31 return (AbstractEventHandler) handler;
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33 throw new DatabaseException("Handler for " + id + " is not instance of AbstractEventHandler (it is instance of " + (handler != null ? handler.getClass() : null) + ")");
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