1/*
2 * Copyright (c) 2017, 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
24package jdk.tools.jaotc.collect;
25
26import jdk.tools.jaotc.LoadedClass;
27
28import java.util.ArrayList;
29import java.util.List;
30
31public final class ClassSearch {
32    private final List<SourceProvider> providers = new ArrayList<>();
33
34    public void addProvider(SourceProvider provider) {
35        providers.add(provider);
36    }
37
38    public List<LoadedClass> search(List<SearchFor> search, SearchPath searchPath) {
39        List<LoadedClass> loaded = new ArrayList<>();
40
41        List<ClassSource> sources = new ArrayList<>();
42
43        for (SearchFor entry : search) {
44            sources.add(findSource(entry, searchPath));
45        }
46
47        for (ClassSource source : sources) {
48            source.eachClass((name, loader) -> loaded.add(loadClass(name, loader)));
49        }
50
51        return loaded;
52    }
53
54    private static LoadedClass loadClass(String name, ClassLoader loader) {
55        try {
56            Class<?> clzz = loader.loadClass(name);
57            return new LoadedClass(name, clzz);
58        } catch (ClassNotFoundException e) {
59            throw new InternalError("Failed to load with: " + loader, e);
60        }
61    }
62
63    private ClassSource findSource(SearchFor searchFor, SearchPath searchPath) {
64        ClassSource found = null;
65
66        for (SourceProvider provider : providers) {
67            if (!searchFor.isUnknown() && !provider.supports(searchFor.getType())) {
68                continue;
69            }
70
71            ClassSource source = provider.findSource(searchFor.getName(), searchPath);
72            if (source != null) {
73                if (found != null) {
74                    throw new InternalError("Multiple possible sources: " + source + " and: " + found);
75                }
76                found = source;
77            }
78        }
79
80        if (found == null) {
81            throw new InternalError("Failed to find " + searchFor.getType() + " file: " + searchFor.getName());
82        }
83        return found;
84    }
85
86    public static List<SearchFor> makeList(String type, String argument) {
87        List<SearchFor> list = new ArrayList<>();
88        String[] elements = argument.split(":");
89        for (String element : elements) {
90            list.add(new SearchFor(element, type));
91        }
92        return list;
93    }
94}
95