1 /*
 2  * Copyright (c) 2024, 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 optkl.ifacemapper;
26 
27 import optkl.IfaceValue;
28 
29 import java.lang.annotation.ElementType;
30 import java.lang.annotation.Retention;
31 import java.lang.annotation.RetentionPolicy;
32 import java.lang.annotation.Target;
33 import java.lang.foreign.MemoryLayout;
34 import java.lang.foreign.MemorySegment;
35 import java.lang.reflect.InvocationTargetException;
36 
37 import static optkl.ifacemapper.MapperUtil.SECRET_BOUND_SCHEMA_METHOD_NAME;
38 import static optkl.ifacemapper.MapperUtil.SECRET_LAYOUT_METHOD_NAME;
39 import static optkl.ifacemapper.MapperUtil.SECRET_OFFSET_METHOD_NAME;
40 import static optkl.ifacemapper.MapperUtil.SECRET_SEGMENT_METHOD_NAME;
41 
42 public interface MappableIface extends IfaceValue {
43     @Retention(RetentionPolicy.RUNTIME)
44     @Target(ElementType.PARAMETER)
45     @interface RW  {}
46     @Retention(RetentionPolicy.RUNTIME)
47     @Target(ElementType.PARAMETER)
48     @interface RO {}
49     @Retention(RetentionPolicy.RUNTIME)
50     @Target(ElementType.PARAMETER)
51     @interface WO {}
52 
53 
54     default int getState(){
55         return BufferState.of(this).getState();
56     }
57     default void setState(int newState ){
58         BufferState.of(this).setState(newState);
59     }
60 
61     default String getStateString(){
62         return BufferState.of(this).getStateString();
63     }
64 
65     static <T extends MappableIface> MemorySegment getMemorySegment(T buffer) {
66         try {
67             return (MemorySegment) buffer.getClass().getDeclaredMethod(SECRET_SEGMENT_METHOD_NAME).invoke(buffer);
68         } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {
69             throw new RuntimeException(e);
70         }
71     }
72 
73     static <T extends Buffer> BoundSchema<?> getBoundSchema(T buffer) {
74         try {
75             return (BoundSchema<?>) buffer.getClass().getDeclaredMethod(SECRET_BOUND_SCHEMA_METHOD_NAME).invoke(buffer);
76         } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {
77             throw new RuntimeException(e);
78         }
79     }
80 
81     static <T extends Buffer> MemoryLayout getLayout(T buffer) {
82         try {
83             return (MemoryLayout) buffer.getClass().getDeclaredMethod(SECRET_LAYOUT_METHOD_NAME).invoke(buffer);
84         } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {
85             throw new RuntimeException(e);
86         }
87     }
88 
89     static <T extends Buffer> long getOffset(T buffer) {
90         try {
91             return (long) buffer.getClass().getDeclaredMethod(SECRET_OFFSET_METHOD_NAME).invoke(buffer);
92         } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {
93             throw new RuntimeException(e);
94         }
95     }
96 }