001    /*
002     * Copyright 2010-2015 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.kotlin.load.java.structure;
018    
019    import org.jetbrains.annotations.NotNull;
020    import org.jetbrains.annotations.Nullable;
021    
022    import java.util.Collections;
023    import java.util.Map;
024    
025    public interface JavaTypeSubstitutor {
026        JavaTypeSubstitutor EMPTY = new JavaTypeSubstitutor() {
027            @NotNull
028            @Override
029            public JavaType substitute(@NotNull JavaType type) {
030                return type;
031            }
032    
033            @Nullable
034            @Override
035            public JavaType substitute(@NotNull JavaTypeParameter typeParameter) {
036                return typeParameter.getType();
037            }
038    
039            @NotNull
040            @Override
041            public Map<JavaTypeParameter, JavaType> getSubstitutionMap() {
042                return Collections.emptyMap();
043            }
044    
045            @Override
046            public String toString() {
047                return "Empty JavaTypeSubstitutor";
048            }
049        };
050    
051        @NotNull
052        JavaType substitute(@NotNull JavaType type);
053    
054        @Nullable
055        JavaType substitute(@NotNull JavaTypeParameter typeParameter);
056    
057        @NotNull
058        Map<JavaTypeParameter, JavaType> getSubstitutionMap();
059    }