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25 
26 package jdk.tools.jlink.internal;
27 
28 import java.lang.module.Configuration;
29 import java.lang.module.ModuleDescriptor;
30 import java.lang.module.ModuleFinder;
31 import java.lang.module.ModuleReader;
32 import java.lang.module.ModuleReference;
33 import java.io.IOException;
34 import java.io.UncheckedIOException;
35 import java.nio.ByteBuffer;
36 import java.util.Collection;
37 import java.util.HashSet;
38 import java.util.Map;
39 import java.util.Optional;
40 import java.util.Set;
41 import java.util.stream.Collectors;
42 import jdk.tools.jlink.plugin.PluginException;
43 import jdk.tools.jlink.plugin.ResourcePool;
44 import jdk.tools.jlink.plugin.ResourcePoolEntry;
45 import jdk.tools.jlink.plugin.ResourcePoolModule;
46 
47 final class ResourcePoolConfiguration {
ResourcePoolConfiguration()48     private ResourcePoolConfiguration() {}
49 
descriptorOf(ResourcePoolModule mod)50     private static ModuleDescriptor descriptorOf(ResourcePoolModule mod) {
51         ModuleDescriptor md = mod.descriptor();
52 
53         // drop hashes
54         ModuleDescriptor.Builder builder = ModuleDescriptor.newModule(md.name());
55         md.requires().stream()
56           .forEach(builder::requires);
57         md.exports().stream()
58           .forEach(builder::exports);
59         md.opens().stream()
60           .forEach(builder::opens);
61         md.uses().stream()
62           .forEach(builder::uses);
63         md.provides().stream()
64           .forEach(builder::provides);
65         builder.packages(md.packages());
66 
67         md.version().ifPresent(builder::version);
68         md.mainClass().ifPresent(builder::mainClass);
69 
70         return builder.build();
71     }
72 
moduleReference(ModuleDescriptor desc)73     private static ModuleReference moduleReference(ModuleDescriptor desc) {
74         return new ModuleReference(desc, null) {
75             @Override
76             public ModuleReader open() {
77                 throw new UnsupportedOperationException();
78             }
79         };
80     }
81 
82     private static Map<String, ModuleReference> allModRefs(ResourcePool pool) {
83         return pool.moduleView().modules().
84             collect(Collectors.toMap(ResourcePoolModule::name,
85                 m -> moduleReference(descriptorOf(m))));
86     }
87 
88     private static void checkPackages(ResourcePool pool) {
89         // check that each resource pool module's packages()
90         // returns a set that is consistent with the module
91         // descriptor of that module.
92 
93         pool.moduleView().modules().forEach(m -> {
94             ModuleDescriptor desc = m.descriptor();
95             if (!desc.packages().equals(m.packages())) {
96                 throw new RuntimeException("Module " + m.name() +
97                    "'s descriptor indicates the set of packages is : " +
98                    desc.packages() + ", but module contains packages: " +
99                    m.packages());
100             }
101         });
102     }
103 
104     static Configuration validate(ResourcePool pool) {
105         checkPackages(pool);
106         final Map<String, ModuleReference> nameToModRef = allModRefs(pool);
107         final Set<ModuleReference> allRefs = new HashSet<>(nameToModRef.values());
108 
109         final ModuleFinder finder = new ModuleFinder() {
110             @Override
111             public Optional<ModuleReference> find(String name) {
112                 return Optional.ofNullable(nameToModRef.get(name));
113             }
114 
115             @Override
116             public Set<ModuleReference> findAll() {
117                 return allRefs;
118             }
119         };
120 
121         return Configuration.empty().resolve(
122             finder, ModuleFinder.of(), nameToModRef.keySet());
123     }
124 }
125