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comparison truffle/com.oracle.truffle.api.interop.java/src/com/oracle/truffle/api/interop/java/ReadFieldNode.java @ 22135:e70b20f4bb00

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Implementing API for Java/Truffle interop. Based around JavaInterop.asJavaObject and JavaInterop.asTruffleObject methods. Connected to TruffleVM via Symbol.as(Class) wrapper. Verified by extended TCK.
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Mon, 07 Sep 2015 17:07:20 +0200
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22134:025869c88840 22135:e70b20f4bb00
1 /*
2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 package com.oracle.truffle.api.interop.java;
26
27 import com.oracle.truffle.api.frame.VirtualFrame;
28 import com.oracle.truffle.api.interop.ForeignAccess;
29 import com.oracle.truffle.api.nodes.RootNode;
30 import java.lang.reflect.Array;
31 import java.lang.reflect.Field;
32 import java.lang.reflect.Method;
33 import java.lang.reflect.Modifier;
34
35 final class ReadFieldNode extends RootNode {
36 ReadFieldNode() {
37 super(JavaInteropLanguage.class, null, null);
38 }
39
40 @Override
41 public Object execute(VirtualFrame frame) {
42 try {
43 JavaInterop.JavaObject receiver = (JavaInterop.JavaObject) ForeignAccess.getReceiver(frame);
44 Object obj = receiver.obj;
45 final boolean onlyStatic = obj == null;
46 final Object nameOrIndex = ForeignAccess.getArguments(frame).get(0);
47 Object val;
48 if (nameOrIndex instanceof Integer) {
49 val = Array.get(obj, (int) nameOrIndex);
50 } else {
51 String name = (String) nameOrIndex;
52 try {
53 final Field field = receiver.clazz.getField(name);
54 final boolean isStatic = (field.getModifiers() & Modifier.STATIC) != 0;
55 if (onlyStatic != isStatic) {
56 throw new NoSuchFieldException();
57 }
58 val = field.get(obj);
59 } catch (NoSuchFieldException ex) {
60 for (Method m : receiver.clazz.getMethods()) {
61 final boolean isStatic = (m.getModifiers() & Modifier.STATIC) != 0;
62 if (onlyStatic != isStatic) {
63 continue;
64 }
65 if (m.getName().equals(name)) {
66 return new JavaInterop.JavaFunctionObject(m, obj);
67 }
68 }
69 throw (NoSuchFieldError) new NoSuchFieldError(ex.getMessage()).initCause(ex);
70 }
71 }
72 if (JavaInterop.isPrimitive(val)) {
73 return val;
74 }
75 return JavaInterop.asTruffleObject(val);
76 } catch (IllegalAccessException ex) {
77 throw new RuntimeException(ex);
78 }
79 }
80
81 }