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.fileClasses;
018    
019    import org.jetbrains.annotations.NotNull;
020    import org.jetbrains.kotlin.name.FqName;
021    
022    public final class OldPackageFacadeClassUtils {
023        private static final String PACKAGE_CLASS_NAME_SUFFIX = "Package";
024        private static final String DEFAULT_PACKAGE_CLASS_NAME = "_Default" + PACKAGE_CLASS_NAME_SUFFIX;
025    
026        private OldPackageFacadeClassUtils() {
027        }
028    
029        // ex. <root> -> _DefaultPackage, a -> APackage, a.b -> BPackage
030        @NotNull
031        public static String getPackageClassName(@NotNull FqName packageFQN) {
032            if (packageFQN.isRoot()) {
033                return DEFAULT_PACKAGE_CLASS_NAME;
034            }
035            return capitalizeNonEmptyString(packageFQN.shortName().asString()) + PACKAGE_CLASS_NAME_SUFFIX;
036        }
037    
038        @NotNull
039        private static String capitalizeNonEmptyString(@NotNull String s) {
040            return Character.isUpperCase(s.charAt(0)) ? s : Character.toUpperCase(s.charAt(0)) + s.substring(1);
041        }
042    }