| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.jackrabbit.oak.spi.query.fulltext; |
| |
| /** |
| * A visitor for full-text expressions. This class is abstract because at least |
| * one of the methods needs to be implemented to make anything useful, most |
| * likely visit(FullTextTerm). |
| */ |
| public interface FullTextVisitor { |
| |
| /** |
| * Visit an "contains" expression. |
| * |
| * @param contains the "contains" expression |
| * @return true if visiting should continue |
| */ |
| boolean visit(FullTextContains contains); |
| |
| /** |
| * Visit an "and" expression. |
| * |
| * @param and the "and" expression |
| * @return true if visiting should continue |
| */ |
| boolean visit(FullTextAnd and); |
| |
| /** |
| * Visit an "or" expression. |
| * |
| * @param or the "or" expression |
| * @return true if visiting should continue |
| */ |
| boolean visit(FullTextOr or); |
| |
| /** |
| * Visit a term |
| * |
| * @param term the term |
| * @return true if visiting should continue |
| */ |
| boolean visit(FullTextTerm term); |
| |
| /** |
| * The base implementation of a full-text visitor. |
| */ |
| public abstract static class FullTextVisitorBase implements FullTextVisitor { |
| |
| @Override |
| public boolean visit(FullTextContains contains) { |
| return contains.getBase().accept(this); |
| } |
| |
| @Override |
| public boolean visit(FullTextAnd and) { |
| for (FullTextExpression e : and.list) { |
| if (!e.accept(this)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| @Override |
| public boolean visit(FullTextOr or) { |
| for (FullTextExpression e : or.list) { |
| if (!e.accept(this)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| } |
| |
| } |