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    public abstract class FqNameBase {
022    
023        protected FqNameBase() {
024            if (!(this instanceof FqName || this instanceof FqNameUnsafe)) {
025                throw new AssertionError("do not use this class directly");
026            }
027        }
028    
029        @NotNull
030        protected abstract String asString();
031    
032        @NotNull
033        private FqNameUnsafe toFqNameUnsafe() {
034            if (this instanceof FqName) {
035                return ((FqName) this).toUnsafe();
036            }
037            else if (this instanceof FqNameUnsafe) {
038                return ((FqNameUnsafe) this);
039            }
040            else {
041                throw new AssertionError();
042            }
043        }
044    
045        public final boolean equalsTo(@NotNull FqName that) {
046            return equalsTo(that.toUnsafe());
047        }
048    
049        public final boolean equalsTo(@NotNull FqNameUnsafe that) {
050            return toFqNameUnsafe().equals(that);
051        }
052    
053        public final boolean equalsTo(@NotNull String that) {
054            return asString().equals(that);
055        }
056    }