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.kotlin;
018    
019    import org.jetbrains.annotations.NotNull;
020    import org.jetbrains.kotlin.resolve.jvm.JvmClassName;
021    import org.jetbrains.kotlin.name.ClassId;
022    import org.jetbrains.kotlin.name.FqName;
023    import org.jetbrains.kotlin.name.Name;
024    
025    public final class PackageClassUtils {
026        public static final String PACKAGE_CLASS_NAME_SUFFIX = "Package";
027        private static final String DEFAULT_PACKAGE_CLASS_NAME = "_Default" + PACKAGE_CLASS_NAME_SUFFIX;
028    
029        private PackageClassUtils() {
030        }
031    
032        // ex. <root> -> _DefaultPackage, a -> APackage, a.b -> BPackage
033        @NotNull
034        public static String getPackageClassName(@NotNull FqName packageFQN) {
035            if (packageFQN.isRoot()) {
036                return DEFAULT_PACKAGE_CLASS_NAME;
037            }
038            return capitalizeNonEmptyString(packageFQN.shortName().asString()) + PACKAGE_CLASS_NAME_SUFFIX;
039        }
040    
041        @NotNull
042        private static String capitalizeNonEmptyString(@NotNull String s) {
043            return Character.isUpperCase(s.charAt(0)) ? s : Character.toUpperCase(s.charAt(0)) + s.substring(1);
044        }
045    
046        @NotNull
047        public static FqName getPackageClassFqName(@NotNull FqName packageFQN) {
048            return packageFQN.child(Name.identifier(getPackageClassName(packageFQN)));
049        }
050    
051        @NotNull
052        public static ClassId getPackageClassId(@NotNull FqName packageFQN) {
053            return new ClassId(packageFQN, Name.identifier(getPackageClassName(packageFQN)));
054        }
055    }