| /* |
| * 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. |
| */ |
| |
| /** |
| * Query nodes commonly used by query parser implementations. |
| * |
| * <h2>Query Nodes</h2> |
| * |
| * <p>The package <code>org.apache.lucene.queryParser.nodes</code> contains all the basic query |
| * nodes. The interface that represents a query node is {@link |
| * org.apache.lucene.queryparser.flexible.core.nodes.QueryNode}. |
| * |
| * <p>{@link org.apache.lucene.queryparser.flexible.core.nodes.QueryNode}s are used by the text |
| * parser to create a syntax tree. These nodes are designed to be used by UI or other text parsers. |
| * The default Lucene text parser is {@link |
| * org.apache.lucene.queryparser.flexible.standard.parser.StandardSyntaxParser}, it implements |
| * Lucene's standard syntax. |
| * |
| * <p>{@link org.apache.lucene.queryparser.flexible.core.nodes.QueryNode} interface should be |
| * implemented by all query nodes, the class {@link |
| * org.apache.lucene.queryparser.flexible.core.nodes.QueryNodeImpl} implements {@link |
| * org.apache.lucene.queryparser.flexible.core.nodes.QueryNode} and is extended by all current query |
| * node implementations. |
| * |
| * <p>A query node tree can be printed to the a stream, and it generates a pseudo XML representation |
| * with all the nodes. |
| * |
| * <p>A query node tree can also generate a query string that can be parsed back by the original |
| * text parser, at this point only the standard lucene syntax is supported. |
| * |
| * <p>Grouping nodes: |
| * |
| * <ul> |
| * <li>AndQueryNode - used for AND operator |
| * <li>AnyQueryNode - used for ANY operator |
| * <li>OrQueryNode - used for OR operator |
| * <li>BooleanQueryNode - used when no operator is specified |
| * <li>ModifierQueryNode - used for modifier operator |
| * <li>GroupQueryNode - used for parenthesis |
| * <li>BoostQueryNode - used for boost operator |
| * <li>SlopQueryNode - phrase slop |
| * <li>FuzzyQueryNode - fuzzy node |
| * <li>TermRangeQueryNode - used for parametric field:[low_value TO high_value] |
| * <li>ProximityQueryNode - used for proximity search |
| * <li>LegacyNumericRangeQueryNode - used for numeric range search |
| * <li>TokenizedPhraseQueryNode - used by tokenizers/lemmatizers/analyzers for phrases/autophrases |
| * </ul> |
| * |
| * <p>Leaf Nodes: |
| * |
| * <ul> |
| * <li>FieldQueryNode - field/value node |
| * <li>LegacyNumericQueryNode - used for numeric search |
| * <li>PathQueryNode - {@link org.apache.lucene.queryparser.flexible.core.nodes.QueryNode} object |
| * used with path-like queries |
| * <li>OpaqueQueryNode - Used as for part of the query that can be parsed by other parsers. |
| * schema/value |
| * <li>PrefixWildcardQueryNode - non-phrase wildcard query |
| * <li>QuotedFieldQUeryNode - regular phrase node |
| * <li>WildcardQueryNode - non-phrase wildcard query |
| * </ul> |
| * |
| * <p>Utility Nodes: |
| * |
| * <ul> |
| * <li>DeletedQueryNode - used by processors on optimizations |
| * <li>MatchAllDocsQueryNode - used by processors on optimizations |
| * <li>MatchNoDocsQueryNode - used by processors on optimizations |
| * <li>NoTokenFoundQueryNode - used by tokenizers/lemmatizers/analyzers |
| * </ul> |
| */ |
| package org.apache.lucene.queryparser.flexible.core.nodes; |
