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.db.layer0.request;
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14 import org.simantics.db.AsyncRequestProcessor;
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15 import org.simantics.db.RequestProcessor;
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16 import org.simantics.db.exception.DatabaseException;
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17 import org.simantics.db.layer0.variable.Variable;
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18 import org.simantics.db.procedure.AsyncListener;
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19 import org.simantics.db.procedure.AsyncProcedure;
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20 import org.simantics.db.procedure.Listener;
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21 import org.simantics.db.procedure.Procedure;
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22 import org.simantics.db.procedure.SyncListener;
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23 import org.simantics.db.procedure.SyncProcedure;
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24 import org.simantics.db.request.Read;
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25 import org.simantics.db.request.ReadInterface;
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27 public abstract class VariableRead<T> implements Read<T>, ReadInterface<T> {
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29 final protected Variable variable;
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32 public int hashCode() {
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33 return variable.hashCode();
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36 protected Class<?> clazz() {
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41 public boolean equals(Object object) {
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44 else if (object == null)
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46 else if (!clazz().isInstance(object))
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48 VariableRead<?> r = (VariableRead<?>) object;
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49 return variable.equals(r.variable);
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52 public VariableRead(Variable variable) {
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53 if(variable == null) throw new IllegalArgumentException("Null variable.");
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54 this.variable = variable;
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58 public void request(AsyncRequestProcessor processor, AsyncProcedure<T> procedure) {
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59 processor.asyncRequest(this, procedure);
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63 public void request(AsyncRequestProcessor processor, Procedure<T> procedure) {
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64 processor.asyncRequest(this, procedure);
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68 public void request(AsyncRequestProcessor processor, SyncProcedure<T> procedure) {
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69 processor.asyncRequest(this, procedure);
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73 public void request(AsyncRequestProcessor processor, AsyncListener<T> procedure) {
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74 processor.asyncRequest(this, procedure);
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78 public void request(AsyncRequestProcessor processor, Listener<T> procedure) {
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79 processor.asyncRequest(this, procedure);
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83 public void request(AsyncRequestProcessor processor, SyncListener<T> procedure) {
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84 processor.asyncRequest(this, procedure);
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88 public T request(RequestProcessor processor) throws DatabaseException {
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89 return processor.syncRequest(this);
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93 public String toString() {
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94 return getClass().getSimpleName() + "|" + variable;
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