1 /*******************************************************************************
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2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
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3 * in Industry THTH ry.
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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.browsing.ui.graph.impl;
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14 import org.simantics.browsing.ui.common.modifiers.AbstractEnumerationModifier;
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15 import org.simantics.browsing.ui.common.modifiers.EnumeratedValue;
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16 import org.simantics.browsing.ui.common.modifiers.Enumeration;
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17 import org.simantics.db.Session;
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18 import org.simantics.db.WriteGraph;
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19 import org.simantics.db.common.request.WriteRequest;
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20 import org.simantics.db.exception.DatabaseException;
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21 import org.simantics.utils.ObjectUtils;
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24 * A graph resource based EnumerationModifier utility implementation.
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26 * @author Tuukka Lehtonen
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28 public abstract class GraphEnumerationModifierBase<T> extends AbstractEnumerationModifier<T> {
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30 protected final Session session;
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32 public GraphEnumerationModifierBase(Session session, Enumeration<T> enumeration, T value) {
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33 this(session, enumeration, enumeration.find(value));
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36 public GraphEnumerationModifierBase(Session session, Enumeration<T> enumeration, EnumeratedValue<T> value) {
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37 super(enumeration, value);
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38 if (session == null)
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39 throw new NullPointerException("null session");
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40 this.session = session;
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44 protected void modifyWithObject(final T oldEnumObject, final T enumObject) {
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45 if (ObjectUtils.objectEquals(oldEnumObject, enumObject))
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49 session.getSession().syncRequest(new WriteRequest() {
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51 public void perform(WriteGraph graph) throws DatabaseException {
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52 // System.out.println("old enum object: " + oldEnumObject);
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53 // System.out.println("enum object: " + enumObject);
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54 modifyWithObject(graph, oldEnumObject, enumObject);
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57 } catch (DatabaseException e) {
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63 * Implement this modifier to perform database modifications.
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66 * @param oldEnumObject
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69 protected abstract void modifyWithObject(WriteGraph graph, T oldEnumObject, T enumObject) throws DatabaseException;
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72 * Client overridable handler for possible exceptions that may occur while
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73 * performing the database modifications.
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76 * This default implementation merely forwards the exception as a runtime
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81 protected void handleException(DatabaseException e) {
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82 throw new RuntimeException(e);
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