1 /*******************************************************************************
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2 * Copyright (c) 2013 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 * Semantum Oy - initial API and implementation
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11 *******************************************************************************/
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12 package org.simantics.diagram.symbolcontribution;
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14 import org.eclipse.core.runtime.IAdaptable;
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17 * A basic triple structure that implements IAdaptable. It tries to adapt the
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18 * objects to the requested class in order (first, second, third).
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20 * @author Tuukka Lehtonen
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22 * @param <T1> type of first
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23 * @param <T2> type of second
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24 * @param <T3> type of third
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26 final class AdaptableTriple<T1, T2, T3> implements IAdaptable {
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27 public final T1 first;
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28 public final T2 second;
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29 public final T3 third;
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30 private final int hash;
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32 public static <T1, T2, T3> AdaptableTriple<T1, T2, T3> make(T1 t1, T2 t2, T3 t3) {
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33 return new AdaptableTriple<T1, T2, T3>(t1, t2, t3);
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36 public AdaptableTriple(T1 first, T2 second, T3 third) {
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38 this.second = second;
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40 this.hash = makeHash();
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44 public boolean equals(Object obj) {
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47 if (!(obj.getClass().equals(this.getClass())))
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49 AdaptableTriple<?, ?, ?> other = (AdaptableTriple<?, ?, ?>) obj;
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50 if (other.first != first && (other.first == null || !other.first.equals(first)))
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52 if (other.second != second && (other.second == null || !other.second.equals(second)))
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54 if (other.third != third && (other.third == null || !other.third.equals(third)))
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60 public int hashCode() {
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65 public String toString() {
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66 return "<"+first+", "+second+", "+third+">";
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69 private int makeHash() {
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70 return (first == null ? 0 : first.hashCode())
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71 + (second == null ? 0 : second.hashCode())*31
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72 + (third == null ? 0 : third.hashCode())*31*31;
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75 private Object adapt(Object o, Class<?> clazz) {
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76 if (clazz.isInstance(o))
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78 if (o instanceof IAdaptable)
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79 return ((IAdaptable) o).getAdapter(clazz);
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83 @SuppressWarnings("rawtypes")
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85 public Object getAdapter(Class adapter) {
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86 Object o = adapt(first, adapter);
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88 o = adapt(second, adapter);
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90 o = adapt(third, adapter);
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