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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  javax.annotation.Nullable;

A map, each entry of which maps a Java raw type to an instance of that type. In addition to implementing Map, the additional type-safe operations putInstance and getInstance are available.

Like any other 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.

See the Guava User Guide article on ClassToInstanceMap.

To map a generic type to an instance of that type, use com.google.common.reflect.TypeToInstanceMap instead.

Parameters:
<B> the common supertype that all entries must share; often this is simply Object
Author(s):
Kevin Bourrillion
Since:
2.0 (imported from Google Collections Library)
public interface ClassToInstanceMap<B> extends Map<Class<? extends B>, B> {
  
Returns the value the specified class is mapped to, or 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 not associate this value with any of the class's supertypes.

Returns:
the value previously associated with this class (possibly null), or null if there was no previous entry.
  <T extends B> T putInstance(Class<T> type, @Nullable T value);
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