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 
26 package jdk.incubator.code.dialect.java;
27 
28 import jdk.incubator.code.TypeElement;
29 import jdk.incubator.code.dialect.java.impl.ConstructorRefImpl;
30 import jdk.incubator.code.dialect.core.FunctionType;
31 
32 import java.lang.invoke.MethodHandle;
33 import java.lang.invoke.MethodHandles;
34 import java.lang.invoke.MethodType;
35 import java.lang.reflect.Constructor;
36 import java.util.List;
37 
38 import static jdk.incubator.code.dialect.core.CoreType.functionType;
39 
40 /**
41  * The symbolic reference to a Java constructor.
42  */
43 public sealed interface ConstructorRef extends JavaRef, TypeVariableType.Owner
44         permits ConstructorRefImpl {
45 
46     FunctionType type();
47 
48     default TypeElement refType() {
49         return type().returnType();
50     }
51 
52     // Resolutions to constructors and method handles
53 
54     // Resolve to constructor on referenced class
55     Constructor<?> resolveToConstructor(MethodHandles.Lookup l) throws ReflectiveOperationException;
56 
57     // Resolve to constructor on referenced class
58     MethodHandle resolveToHandle(MethodHandles.Lookup l) throws ReflectiveOperationException;
59 
60     // Factories
61 
62     static ConstructorRef constructor(Constructor<?> c) {
63         return constructor(c.getDeclaringClass(),
64                 c.getParameterTypes());
65     }
66 
67     static ConstructorRef constructor(MethodType mt) {
68         return constructor(mt.returnType(), mt.parameterList());
69     }
70 
71     static ConstructorRef constructor(Class<?> refType, Class<?>... params) {
72         return constructor(refType, List.of(params));
73     }
74 
75     static ConstructorRef constructor(Class<?> refType, List<Class<?>> params) {
76         return constructor(JavaType.type(refType), params.stream().map(JavaType::type).toList());
77     }
78 
79     static ConstructorRef constructor(TypeElement refType, List<? extends TypeElement> params) {
80         return constructor(functionType(refType, params));
81     }
82 
83     static ConstructorRef constructor(TypeElement refType, TypeElement... params) {
84         return constructor(functionType(refType, params));
85     }
86 
87     static ConstructorRef constructor(FunctionType type) {
88         return new ConstructorRefImpl(type);
89     }
90 }