1/*
2 * Copyright (c) 2003, 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
26package sun.reflect.generics.reflectiveObjects;
27
28import java.lang.reflect.Type;
29import sun.reflect.generics.factory.GenericsFactory;
30import sun.reflect.generics.tree.FieldTypeSignature;
31import sun.reflect.generics.visitor.Reifier;
32
33
34/**
35 * Common infrastructure for things that lazily generate reflective generics
36 * objects.
37 * <p> In all these cases, one needs produce a visitor that will, on demand,
38 * traverse the stored AST(s) and reify them into reflective objects.
39 * The visitor needs to be initialized with a factory, which will be
40 * provided when the instance is initialized.
41 * The factory should be cached.
42 *
43*/
44public abstract class LazyReflectiveObjectGenerator {
45    private final GenericsFactory factory; // cached factory
46
47    protected LazyReflectiveObjectGenerator(GenericsFactory f) {
48        factory = f;
49    }
50
51    // accessor for factory
52    private GenericsFactory getFactory() {
53        return factory;
54    }
55
56    // produce a reifying visitor (could this be typed as a TypeTreeVisitor?
57    protected Reifier getReifier(){return Reifier.make(getFactory());}
58
59    Type[] reifyBounds(FieldTypeSignature[] boundASTs) {
60        final int length = boundASTs.length;
61        final Type[] bounds = new Type[length];
62        // iterate over bound trees, reifying each in turn
63        for (int i = 0; i < length; i++) {
64            Reifier r = getReifier();
65            boundASTs[i].accept(r);
66            bounds[i] = r.getResult();
67        }
68        return bounds;
69    }
70
71}
72