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
017package org.jetbrains.jet.lang.types;
018
019import org.jetbrains.annotations.NotNull;
020
021public class CompositeTypeSubstitution implements TypeSubstitution {
022    private final TypeSubstitution[] inner;
023
024    public CompositeTypeSubstitution(@NotNull TypeSubstitution... inner) {
025        this.inner = inner;
026    }
027
028    @Override
029    public TypeProjection get(TypeConstructor key) {
030        for (TypeSubstitution substitution : inner) {
031            TypeProjection value = substitution.get(key);
032            if (value != null) return value;
033        }
034        return null;
035    }
036
037    @Override
038    public boolean isEmpty() {
039        for (TypeSubstitution substitution : inner) {
040            if (!substitution.isEmpty()) return false;
041        }
042        return true;
043    }
044
045    @Override
046    public String toString() {
047        StringBuilder builder = new StringBuilder();
048        for (TypeSubstitution substitution : inner) {
049            builder.append(substitution).append(" * ");
050        }
051        return builder.toString();
052    }
053}