001    /*
002     * Copyright 2010-2013 JetBrains s.r.o.
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    
017    package org.jetbrains.jet.utils;
018    
019    import com.intellij.util.NotNullFunction;
020    import org.jetbrains.annotations.NotNull;
021    
022    import java.util.Map;
023    
024    public abstract class NotNullMemoizedFunction<K, V> extends NullableMemoizedFunction<K, V>  implements NotNullFunction<K, V> {
025    
026        public static <K, V> NotNullFunction<K, V> create(@NotNull final NotNullFunction<K, V> compute) {
027            return new NotNullMemoizedFunction<K, V>() {
028                @NotNull
029                @Override
030                protected V compute(@NotNull K input) {
031                    return compute.fun(input);
032                }
033            };
034        }
035    
036        public NotNullMemoizedFunction(@NotNull Map<K, Object> map) {
037            super(map);
038        }
039    
040        public NotNullMemoizedFunction() {
041            super();
042        }
043    
044        @NotNull
045        @Override
046        public V fun(@NotNull K input) {
047            //noinspection ConstantConditions
048            return super.fun(input);
049        }
050    
051        @NotNull
052        @Override
053        protected abstract V compute(@NotNull K input);
054    }