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annotate truffle/com.oracle.truffle.api.object/src/com/oracle/truffle/api/object/ObjectType.java @ 22548:6b76a24fffbd default tip

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author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Thu, 14 Jan 2016 14:20:57 +0100
parents 0ad8cb1608be
children
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1 /*
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2 * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation. Oracle designates this
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8 * particular file as subject to the "Classpath" exception as provided
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9 * by Oracle in the LICENSE file that accompanied this code.
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10 *
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11 * This code is distributed in the hope that it will be useful, but WITHOUT
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 * version 2 for more details (a copy is included in the LICENSE file that
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15 * accompanied this code).
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16 *
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17 * You should have received a copy of the GNU General Public License version
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18 * 2 along with this work; if not, write to the Free Software Foundation,
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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20 *
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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22 * or visit www.oracle.com if you need additional information or have any
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23 * questions.
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24 */
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25 package com.oracle.truffle.api.object;
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26
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27 import com.oracle.truffle.api.CallTarget;
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28 import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
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29 import com.oracle.truffle.api.interop.ForeignAccess;
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30 import com.oracle.truffle.api.interop.Message;
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31 import com.oracle.truffle.api.interop.TruffleObject;
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32
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33 /**
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34 * An extensible object type descriptor for {@link DynamicObject}s.
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35 */
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36 public class ObjectType {
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37 /**
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38 * Delegate method for {@link DynamicObject#equals(Object)}.
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39 */
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40 public boolean equals(DynamicObject object, Object other) {
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41 return object == other;
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42 }
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43
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44 /**
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45 * Delegate method for {@link DynamicObject#hashCode()}.
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46 */
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47 public int hashCode(DynamicObject object) {
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48 return System.identityHashCode(object);
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49 }
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50
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51 /**
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52 * Delegate method for {@link DynamicObject#toString()}.
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53 */
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54 @TruffleBoundary
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55 public String toString(DynamicObject object) {
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56 return "DynamicObject<" + this.toString() + ">@" + Integer.toHexString(hashCode(object));
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57 }
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58
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59 /**
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60 * Creates a data object to be associated with a newly created shape.
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61 *
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62 * @param shape the shape for which to create the data object
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63 */
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64 public Object createShapeData(Shape shape) {
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65 return null;
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66 }
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67
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68 @Deprecated
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69 public ForeignAccess getForeignAccessFactory() {
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70 return ForeignAccess.create(new com.oracle.truffle.api.interop.ForeignAccess.Factory() {
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71
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72 public boolean canHandle(TruffleObject obj) {
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73 throw new IllegalArgumentException(this.toString() + " cannot be shared");
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74 }
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75
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76 public CallTarget accessMessage(Message tree) {
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77 throw new IllegalArgumentException(this.toString() + " cannot be shared; Message not possible: " + tree.toString());
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78 }
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79 });
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80 }
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81
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82 /**
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83 * Create a {@link ForeignAccess} to access a specific {@link DynamicObject}.
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84 *
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85 * @param object the object to be accessed
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86 */
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87 public ForeignAccess getForeignAccessFactory(DynamicObject object) {
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88 return getForeignAccessFactory();
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89 }
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90 }