1 /*******************************************************************************
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2 * Copyright (c) 2007, 2011 Association for Decentralized Information Management in
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4 * All rights reserved. This program and the accompanying materials
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5 * are made available under the terms of the Eclipse Public License v1.0
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6 * which accompanies this distribution, and is available at
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7 * http://www.eclipse.org/legal/epl-v10.html
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10 * VTT Technical Research Centre of Finland - initial API and implementation
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11 *******************************************************************************/
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12 package org.simantics.modeling.subscription;
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14 import java.util.Collection;
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15 import java.util.HashSet;
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16 import java.util.Set;
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18 import org.simantics.db.ReadGraph;
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19 import org.simantics.db.Resource;
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20 import org.simantics.db.common.request.UniqueRead;
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21 import org.simantics.db.exception.DatabaseException;
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22 import org.simantics.layer0.Layer0;
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23 import org.simantics.modeling.ModelingResources;
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27 * This query returns all subscription items for a collection of subscriptions.
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29 public class SubscriptionItemsQuery extends UniqueRead<Set<Resource>> {
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31 Collection<Resource> resources;
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33 public SubscriptionItemsQuery(Collection<Resource> resources) {
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35 this.resources = resources;
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39 public Set<Resource> perform(ReadGraph graph) throws DatabaseException {
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41 Set<Resource> result = new HashSet<Resource>();
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42 ModelingResources MOD = ModelingResources.getInstance(graph);
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43 Layer0 L0 = Layer0.getInstance(graph);
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45 for (Resource r : resources) {
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46 if ( graph.isInstanceOf(r, MOD.Subscription_Item)) result.add(r);
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47 else if ( graph.isInstanceOf(r, MOD.Subscription)) {
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48 for (Resource rr : graph.getObjects(r, L0.ConsistsOf)) {
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49 if ( graph.isInstanceOf(rr, MOD.Subscription_Item)) result.add(rr);
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