HUGE refactoring of InjectorImpl. getBinding() now returns synthetic bindings in addition to explicit bindings. No more warnings in InjectorImpl!!!

git-svn-id: https://google-guice.googlecode.com/svn/trunk@359 d779f126-a31b-0410-b53b-1d3aecad763e
diff --git a/src/com/google/inject/LinkedProviderBindingImpl.java b/src/com/google/inject/LinkedProviderBindingImpl.java
new file mode 100644
index 0000000..c74881b
--- /dev/null
+++ b/src/com/google/inject/LinkedProviderBindingImpl.java
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2007 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.inject;
+
+import com.google.inject.spi.LinkedProviderBinding;
+import com.google.inject.spi.BindingVisitor;
+import com.google.inject.internal.ToStringBuilder;
+
+/**
+ *
+ *
+ */
+class LinkedProviderBindingImpl<T> extends BindingImpl<T>
+    implements LinkedProviderBinding<T> {
+
+  final Key<? extends Provider<? extends T>> providerKey;
+
+  LinkedProviderBindingImpl(InjectorImpl injector, Key<T> key, Object source,
+      InternalFactory<? extends T> internalFactory, Scope scope,
+      Key<? extends Provider<? extends T>> providerKey) {
+    super(injector, key, source, internalFactory, scope);
+    this.providerKey = providerKey;
+  }
+
+  public void accept(BindingVisitor<? super T> bindingVisitor) {
+    bindingVisitor.visit(this);
+  }
+
+  public Binding<? extends Provider<? extends T>> getTargetProvider() {
+    return injector.getBinding(providerKey);
+  }
+
+  @Override
+  public String toString() {
+    return new ToStringBuilder(LinkedProviderBinding.class)
+        .add("key", key)
+        .add("provider", providerKey)
+        .add("scope", scope)
+        .add("source", source)
+        .toString();
+  }
+}