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34 package info.magnolia.objectfactory.guice;
35
36 import java.util.Arrays;
37 import java.util.HashSet;
38 import java.util.Map;
39 import java.util.Set;
40 import java.util.logging.Logger;
41
42 import com.google.inject.AbstractModule;
43 import com.google.inject.Binding;
44 import com.google.inject.Injector;
45 import com.google.inject.Key;
46 import com.google.inject.Provider;
47 import com.google.inject.Stage;
48
49
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53
54 public class GuiceParentBindingsModule extends AbstractModule {
55
56 private Injector parentInjector;
57 private Set<Key<?>> excluded = new HashSet<Key<?>>();
58
59 public GuiceParentBindingsModule(Injector parentInjector) {
60 this.parentInjector = parentInjector;
61 exclude(Injector.class, Stage.class, Logger.class);
62 }
63
64 public void exclude(Key<?>... keys) {
65 this.excluded.addAll(Arrays.asList(keys));
66 }
67
68 public void exclude(Class<?>... classes) {
69 for (Class<?> clazz : classes) {
70 this.excluded.add(Key.get(clazz));
71 }
72 }
73
74 @Override
75 protected void configure() {
76
77 Injector injector = parentInjector;
78 do {
79 Map<Key<?>, Binding<?>> explicitBindings = injector.getBindings();
80 for (Map.Entry<Key<?>, Binding<?>> entry : explicitBindings.entrySet()) {
81 Key<?> key = entry.getKey();
82 if (!excluded.contains(key)) {
83 final Provider<?> provider = entry.getValue().getProvider();
84
85 bind(key).toProvider(new Provider() {
86 @Override
87 public Object get() {
88 return provider.get();
89 }
90 });
91 }
92 }
93 injector = injector.getParent();
94 } while (injector != null);
95 }
96 }