1 /*******************************************************************************
2 * Copyright (c) 2013 Association for Decentralized Information Management
4 * All rights reserved. This program and the accompanying materials
5 * are made available under the terms of the Eclipse Public License v1.0
6 * which accompanies this distribution, and is available at
7 * http://www.eclipse.org/legal/epl-v10.html
10 * Semantum Oy - initial API and implementation
11 *******************************************************************************/
12 package org.simantics.diagram.symbolcontribution;
14 import org.eclipse.core.runtime.IAdaptable;
17 * A basic triple structure that implements IAdaptable. It tries to adapt the
18 * objects to the requested class in order (first, second, third).
20 * @author Tuukka Lehtonen
22 * @param <T1> type of first
23 * @param <T2> type of second
24 * @param <T3> type of third
26 final class AdaptableTriple<T1, T2, T3> implements IAdaptable {
27 public final T1 first;
28 public final T2 second;
29 public final T3 third;
30 private final int hash;
32 public static <T1, T2, T3> AdaptableTriple<T1, T2, T3> make(T1 t1, T2 t2, T3 t3) {
33 return new AdaptableTriple<T1, T2, T3>(t1, t2, t3);
36 public AdaptableTriple(T1 first, T2 second, T3 third) {
40 this.hash = makeHash();
44 public boolean equals(Object obj) {
47 if (!(obj.getClass().equals(this.getClass())))
49 AdaptableTriple<?, ?, ?> other = (AdaptableTriple<?, ?, ?>) obj;
50 if (other.first != first && (other.first == null || !other.first.equals(first)))
52 if (other.second != second && (other.second == null || !other.second.equals(second)))
54 if (other.third != third && (other.third == null || !other.third.equals(third)))
60 public int hashCode() {
65 public String toString() {
66 return "<"+first+", "+second+", "+third+">";
69 private int makeHash() {
70 return (first == null ? 0 : first.hashCode())
71 + (second == null ? 0 : second.hashCode())*31
72 + (third == null ? 0 : third.hashCode())*31*31;
75 private Object adapt(Object o, Class<?> clazz) {
76 if (clazz.isInstance(o))
78 if (o instanceof IAdaptable)
79 return ((IAdaptable) o).getAdapter(clazz);
83 @SuppressWarnings("rawtypes")
85 public Object getAdapter(Class adapter) {
86 Object o = adapt(first, adapter);
88 o = adapt(second, adapter);
90 o = adapt(third, adapter);