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comparison graal/com.oracle.jvmci.meta/src/com/oracle/jvmci/meta/MetaAccessProvider.java @ 21556:48c1ebd24120

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renamed com.oracle.graal.api[meta|code] modules to com.oracle.jvmci.[meta|code] (JBS:GRAAL-53)
author Doug Simon <doug.simon@oracle.com>
date Wed, 27 May 2015 00:36:16 +0200
parents graal/com.oracle.graal.api.meta/src/com/oracle/graal/api/meta/MetaAccessProvider.java@2906b3cc3e2f
children
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21555:d12eaef9af72 21556:48c1ebd24120
1 /*
2 * Copyright (c) 2012, 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.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23 package com.oracle.jvmci.meta;
24
25 import java.lang.reflect.*;
26
27 /**
28 * Provides access to the metadata of a class typically provided in a class file.
29 */
30 public interface MetaAccessProvider {
31
32 /**
33 * Returns the resolved Java type representing a given Java class.
34 *
35 * @param clazz the Java class object
36 * @return the resolved Java type object
37 */
38 ResolvedJavaType lookupJavaType(Class<?> clazz);
39
40 /**
41 * Returns the resolved Java types representing some given Java classes.
42 *
43 * @param classes the Java class objects
44 * @return the resolved Java type objects
45 */
46 default ResolvedJavaType[] lookupJavaTypes(Class<?>[] classes) {
47 ResolvedJavaType[] result = new ResolvedJavaType[classes.length];
48 for (int i = 0; i < result.length; i++) {
49 result[i] = lookupJavaType(classes[i]);
50 }
51 return result;
52 }
53
54 /**
55 * Provides the {@link ResolvedJavaMethod} for a {@link Method} or {@link Constructor} obtained
56 * via reflection.
57 */
58 ResolvedJavaMethod lookupJavaMethod(Executable reflectionMethod);
59
60 /**
61 * Provides the {@link ResolvedJavaField} for a {@link Field} obtained via reflection.
62 */
63 ResolvedJavaField lookupJavaField(Field reflectionField);
64
65 /**
66 * Returns the resolved Java type of the given {@link JavaConstant} object.
67 *
68 * @return {@code null} if {@code constant.isNull() || !constant.kind.isObject()}
69 */
70 ResolvedJavaType lookupJavaType(JavaConstant constant);
71
72 /**
73 * Returns the number of bytes occupied by this constant value or constant object.
74 *
75 * @param constant the constant whose bytes should be measured
76 * @return the number of bytes occupied by this constant
77 */
78 long getMemorySize(JavaConstant constant);
79
80 /**
81 * Parses a <a
82 * href="http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.3.3">method
83 * descriptor</a> into a {@link Signature}. The behavior of this method is undefined if the
84 * method descriptor is not well formed.
85 */
86 Signature parseMethodDescriptor(String methodDescriptor);
87
88 /**
89 * Encodes a deoptimization action and a deoptimization reason in an integer value.
90 *
91 * @param debugId an integer that can be used to track the origin of a deoptimization at
92 * runtime. There is no guarantee that the runtime will use this value. The runtime
93 * may even keep fewer than 32 bits.
94 *
95 * @return the encoded value as an integer
96 */
97 JavaConstant encodeDeoptActionAndReason(DeoptimizationAction action, DeoptimizationReason reason, int debugId);
98
99 DeoptimizationReason decodeDeoptReason(JavaConstant constant);
100
101 DeoptimizationAction decodeDeoptAction(JavaConstant constant);
102
103 int decodeDebugId(JavaConstant constant);
104 }