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.js.translate.general;
018    
019    import org.jetbrains.annotations.NotNull;
020    import org.jetbrains.kotlin.js.resolve.diagnostics.ErrorsJs;
021    import org.jetbrains.kotlin.js.translate.context.TranslationContext;
022    import org.jetbrains.kotlin.psi.JetDeclaration;
023    import org.jetbrains.kotlin.psi.JetDeclarationContainer;
024    import org.jetbrains.kotlin.psi.JetElement;
025    import org.jetbrains.kotlin.psi.JetVisitor;
026    
027    /**
028     * This class is a base class for all visitors.
029     */
030    public abstract class TranslatorVisitor<T> extends JetVisitor<T, TranslationContext> {
031    
032        protected abstract T emptyResult(@NotNull TranslationContext context);
033    
034        @Override
035        public T visitJetElement(@NotNull JetElement expression, TranslationContext context) {
036            context.bindingTrace().report(ErrorsJs.NOT_SUPPORTED.on(expression, expression));
037            return emptyResult(context);
038        }
039    
040        public final void traverseContainer(@NotNull JetDeclarationContainer jetClass,
041                @NotNull TranslationContext context) {
042            for (JetDeclaration declaration : jetClass.getDeclarations()) {
043                declaration.accept(this, context);
044            }
045        }
046    }