001    /*
002     * Copyright 2010-2016 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.asJava;
018    
019    import org.jetbrains.annotations.NotNull;
020    import org.jetbrains.kotlin.name.ClassId;
021    import org.jetbrains.kotlin.name.FqName;
022    import org.jetbrains.kotlin.name.Name;
023    
024    public final class OldPackageFacadeClassUtils {
025        private static final String PACKAGE_CLASS_NAME_SUFFIX = "Package";
026        private static final String DEFAULT_PACKAGE_CLASS_NAME = "_Default" + PACKAGE_CLASS_NAME_SUFFIX;
027    
028        private OldPackageFacadeClassUtils() {
029        }
030    
031        // ex. <root> -> _DefaultPackage, a -> APackage, a.b -> BPackage
032        @NotNull
033        public static String getPackageClassName(@NotNull FqName packageFQN) {
034            if (packageFQN.isRoot()) {
035                return DEFAULT_PACKAGE_CLASS_NAME;
036            }
037            return capitalizeNonEmptyString(packageFQN.shortName().asString()) + PACKAGE_CLASS_NAME_SUFFIX;
038        }
039    
040        @NotNull
041        private static String capitalizeNonEmptyString(@NotNull String s) {
042            return Character.isUpperCase(s.charAt(0)) ? s : Character.toUpperCase(s.charAt(0)) + s.substring(1);
043        }
044    
045        @NotNull
046        public static FqName getPackageClassFqName(@NotNull FqName packageFQN) {
047            return packageFQN.child(Name.identifier(getPackageClassName(packageFQN)));
048        }
049    
050        @NotNull
051        public static ClassId getPackageClassId(@NotNull FqName packageFQN) {
052            return new ClassId(packageFQN, Name.identifier(getPackageClassName(packageFQN)));
053        }
054    }