| /* |
| * Copyright 2000-2012 JetBrains s.r.o. |
| * |
| * 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.intellij.util.keyFMap; |
| |
| import com.intellij.openapi.util.Key; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * An immutable map optimized for storing few {@link Key} entries with relatively rare updates |
| * To construct a map, start with {@link KeyFMap#EMPTY_MAP} and call {@link #plus} and {@link #minus} |
| * |
| * @author peter |
| */ |
| public interface KeyFMap { |
| KeyFMap EMPTY_MAP = new EmptyFMap(); |
| |
| @NotNull |
| <V> KeyFMap plus(@NotNull Key<V> key, @NotNull V value); |
| @NotNull |
| KeyFMap minus(@NotNull Key<?> key); |
| |
| @Nullable |
| <V> V get(@NotNull Key<V> key); |
| |
| String toString(); |
| |
| boolean isEmpty(); |
| } |