1 /*
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 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
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 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.
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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).
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25 package jdk.internal.foreign.abi;
26 
27 import jdk.incubator.foreign.FunctionDescriptor;
28 
29 import java.lang.invoke.MethodType;
30 import java.util.List;
31 import java.util.stream.IntStream;
32 import java.util.stream.Stream;
33 
34 public class CallingSequence {
35     private final MethodType mt;
36     private final FunctionDescriptor desc;
37     private final boolean isTrivial;
38 
39     private final List<Binding> returnBindings;
40     private final List<List<Binding>> argumentBindings;
41 
42     public CallingSequence(MethodType mt, FunctionDescriptor desc,
43                            boolean isTrivial, List<List<Binding>> argumentBindings, List<Binding> returnBindings) {
44         this.mt = mt;
45         this.desc = desc;
46         this.isTrivial = isTrivial;
47         this.returnBindings = returnBindings;
48         this.argumentBindings = argumentBindings;
49     }
50 
51     public int argumentCount() {
52         return argumentBindings.size();
53     }
54 
55     public List<Binding> argumentBindings(int i) {
56         return argumentBindings.get(i);
57     }
58 
59     public Stream<Binding> argumentBindings() {
60         return argumentBindings.stream().flatMap(List::stream);
61     }
62 
63     public List<Binding> returnBindings() {
64         return returnBindings;
65     }
66 
67     public String asString() {
68         StringBuilder sb = new StringBuilder();
69 
70         sb.append("CallingSequence: {\n");
71         sb.append("  MethodType: ").append(mt);
72         sb.append("  FunctionDescriptor: ").append(desc);
73         sb.append("  Argument Bindings:\n");
74         for (int i = 0; i < mt.parameterCount(); i++) {
75             sb.append("    ").append(i).append(": ").append(argumentBindings.get(i)).append("\n");
76         }
77         if (mt.returnType() != void.class) {
78             sb.append("    ").append("Return: ").append(returnBindings).append("\n");
79         }
80         sb.append("}\n");
81 
82         return sb.toString();
83     }
84 
85     public MethodType methodType() {
86         return mt;
87     }
88 
89     public FunctionDescriptor functionDesc() {
90         return desc;
91     }
92 
93     public boolean isTrivial() {
94         return isTrivial;
95     }
96 }