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diff --git a/guava/src/com/google/common/collect/ClassToInstanceMap.java b/guava/src/com/google/common/collect/ClassToInstanceMap.java
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+/*
+ * Copyright (C) 2007 The Guava Authors
+ *
+ * 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.common.collect;
+
+import com.google.common.annotations.GwtCompatible;
+
+import java.util.Map;
+
+import javax.annotation.Nullable;
+
+/**
+ * A map, each entry of which maps a Java
+ * <a href="http://tinyurl.com/2cmwkz">raw type</a> to an instance of that type.
+ * In addition to implementing {@code Map}, the additional type-safe operations
+ * {@link #putInstance} and {@link #getInstance} are available.
+ *
+ * <p>Like any other {@code Map<Class, Object>}, this map may contain entries
+ * for primitive types, and a primitive type and its corresponding wrapper type
+ * may map to different values.
+ * 
+ * <p>See the Guava User Guide article on <a href=
+ * "http://code.google.com/p/guava-libraries/wiki/NewCollectionTypesExplained#ClassToInstanceMap">
+ * {@code ClassToInstanceMap}</a>.
+ *
+ * <p>To map a generic type to an instance of that type, use {@link
+ * com.google.common.reflect.TypeToInstanceMap} instead.
+ *
+ * @param <B> the common supertype that all entries must share; often this is
+ *     simply {@link Object}
+ *
+ * @author Kevin Bourrillion
+ * @since 2.0 (imported from Google Collections Library)
+ */
+@GwtCompatible
+public interface ClassToInstanceMap<B> extends Map<Class<? extends B>, B> {
+  /**
+   * Returns the value the specified class is mapped to, or {@code null} if no
+   * entry for this class is present. This will only return a value that was
+   * bound to this specific class, not a value that may have been bound to a
+   * subtype.
+   */
+  <T extends B> T getInstance(Class<T> type);
+
+  /**
+   * Maps the specified class to the specified value. Does <i>not</i> associate
+   * this value with any of the class's supertypes.
+   *
+   * @return the value previously associated with this class (possibly {@code
+   *     null}), or {@code null} if there was no previous entry.
+   */
+  <T extends B> T putInstance(Class<T> type, @Nullable T value);
+}