| /* |
| * 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. |
| */ |
| |
| /** |
| * Necessary interfaces to implement text parsers. |
| * |
| * <h2>Parser</h2> |
| * <p> |
| * The package <tt>org.apache.lucene.queryparser.flexible.parser</tt> contains interfaces |
| * that should be implemented by the parsers. |
| * |
| * Parsers produce QueryNode Trees from a string object. |
| * These package still needs some work to add support to for multiple parsers. |
| * |
| * Features that should be supported for the future, related with the parser: |
| * - QueryNode tree should be able convertible to any parser syntax. |
| * - The query syntax should support calling other parsers. |
| * - QueryNode tree created by multiple parsers. |
| */ |
| package org.apache.lucene.queryparser.flexible.core.parser; |
