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    
017    package org.jetbrains.jet.lang.resolve.name;
018    
019    import org.jetbrains.annotations.NotNull;
020    
021    import java.util.List;
022    
023    public abstract class FqNameBase {
024    
025        protected FqNameBase() {
026            if (!(this instanceof FqName || this instanceof FqNameUnsafe)) {
027                throw new AssertionError("do not use this class directly");
028            }
029        }
030    
031        @NotNull
032        protected abstract String asString();
033    
034        @NotNull
035        private FqNameUnsafe toFqNameUnsafe() {
036            if (this instanceof FqName) {
037                return ((FqName) this).toUnsafe();
038            }
039            else if (this instanceof FqNameUnsafe) {
040                return ((FqNameUnsafe) this);
041            }
042            else {
043                throw new AssertionError();
044            }
045        }
046    
047        public final boolean equalsTo(@NotNull FqName that) {
048            return equalsTo(that.toUnsafe());
049        }
050    
051        public final boolean equalsTo(@NotNull FqNameUnsafe that) {
052            return toFqNameUnsafe().equals(that);
053        }
054    
055        @NotNull
056        public abstract Name shortNameOrSpecial();
057    
058        @NotNull
059        public abstract List<Name> pathSegments();
060    }