Mercurial > hg > graal-jvmci-8
comparison graal/com.oracle.truffle.api/src/com/oracle/truffle/api/impl/Accessor.java @ 21468:99942eac9c6d
Introducing TruffleVM - a central place to invoke code in any registered TruffleLanguage.
author | Jaroslav Tulach <jaroslav.tulach@oracle.com> |
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date | Fri, 22 May 2015 13:41:10 +0200 |
parents | |
children | bb51b9a142b3 |
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21467:d4db9d812c8d | 21468:99942eac9c6d |
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1 /* | |
2 * Copyright (c) 2014, 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.impl; | |
26 | |
27 import com.oracle.truffle.api.TruffleLanguage; | |
28 import com.oracle.truffle.api.TruffleLanguage.Env; | |
29 import com.oracle.truffle.api.vm.TruffleVM; | |
30 import com.oracle.truffle.api.source.Source; | |
31 import java.io.IOException; | |
32 import java.util.ServiceLoader; | |
33 | |
34 /** | |
35 * Communication between TruffleVM and TruffleLanguage API/SPI. | |
36 */ | |
37 public abstract class Accessor { | |
38 private static Accessor API; | |
39 private static Accessor SPI; | |
40 static { | |
41 TruffleLanguage lng = new TruffleLanguage() { | |
42 @Override | |
43 protected Object eval(Source code) throws IOException { | |
44 return null; | |
45 } | |
46 | |
47 @Override | |
48 protected Object findExportedSymbol(String globalName) { | |
49 return null; | |
50 } | |
51 | |
52 @Override | |
53 protected Object getLanguageGlobal() { | |
54 return null; | |
55 } | |
56 | |
57 @Override | |
58 protected boolean isObjectOfLanguage(Object object) { | |
59 return false; | |
60 } | |
61 }; | |
62 lng.hashCode(); | |
63 } | |
64 | |
65 protected Accessor() { | |
66 if (this.getClass().getSimpleName().endsWith("API")) { | |
67 if (API != null) { | |
68 throw new IllegalStateException(); | |
69 } | |
70 API = this; | |
71 } else { | |
72 if (SPI != null) { | |
73 throw new IllegalStateException(); | |
74 } | |
75 SPI = this; | |
76 } | |
77 } | |
78 | |
79 protected Env attachEnv(TruffleVM vm, TruffleLanguage l) { | |
80 return API.attachEnv(vm, l); | |
81 } | |
82 | |
83 protected Object eval(TruffleLanguage l, Source s) throws IOException { | |
84 return API.eval(l, s); | |
85 } | |
86 | |
87 protected Object importSymbol(TruffleVM vm, TruffleLanguage queryingLang, String globalName) { | |
88 return SPI.importSymbol(vm, queryingLang, globalName); | |
89 } | |
90 | |
91 protected Object findExportedSymbol(TruffleLanguage l, String globalName) { | |
92 return API.findExportedSymbol(l, globalName); | |
93 } | |
94 | |
95 protected Object languageGlobal(TruffleLanguage l) { | |
96 return API.languageGlobal(l); | |
97 } | |
98 | |
99 protected Object invoke(Object obj, Object[] args) throws IOException { | |
100 for (SymbolInvoker si : ServiceLoader.load(SymbolInvoker.class)) { | |
101 return si.invoke(obj, args); | |
102 } | |
103 throw new IOException("No symbol invoker found!"); | |
104 } | |
105 | |
106 } |