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.types;
018    
019    import org.jetbrains.annotations.NotNull;
020    import org.jetbrains.annotations.Nullable;
021    import org.jetbrains.annotations.ReadOnly;
022    import org.jetbrains.kotlin.builtins.KotlinBuiltIns;
023    import org.jetbrains.kotlin.descriptors.ClassifierDescriptor;
024    import org.jetbrains.kotlin.descriptors.TypeParameterDescriptor;
025    
026    import java.util.Collection;
027    import java.util.List;
028    
029    public interface TypeConstructor {
030        /**
031         * It may differ from ClassDescriptor.declaredParameters if the class is inner, in such case
032         * it also contains additional parameters from outer declarations.
033         *
034         * @return list of parameters for type constructor, both from current declaration and the outer one
035         */
036        @NotNull
037        @ReadOnly
038        List<TypeParameterDescriptor> getParameters();
039    
040        @NotNull
041        @ReadOnly
042        Collection<KotlinType> getSupertypes();
043    
044        /**
045         * Cannot have subtypes.
046         */
047        boolean isFinal();
048    
049        /**
050         * If the type is non-denotable, it can't be written in code directly, it only can appear internally inside a type checker.
051         * Examples: intersection type or number value type.
052         */
053        boolean isDenotable();
054    
055        @Nullable
056        ClassifierDescriptor getDeclarationDescriptor();
057    
058        @NotNull
059        KotlinBuiltIns getBuiltIns();
060    }