| /* |
| * 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.lucene.queryparser.flexible.core.nodes; |
| |
| import org.apache.lucene.queryparser.flexible.core.parser.EscapeQuerySyntax; |
| |
| /** |
| * A {@link MatchAllDocsQueryNode} indicates that a query node tree or subtree |
| * will match all documents if executed in the index. |
| */ |
| public class MatchAllDocsQueryNode extends QueryNodeImpl { |
| |
| public MatchAllDocsQueryNode() { |
| // empty constructor |
| } |
| |
| @Override |
| public String toString() { |
| return "<matchAllDocs field='*' term='*'/>"; |
| } |
| |
| @Override |
| public CharSequence toQueryString(EscapeQuerySyntax escapeSyntaxParser) { |
| return "*:*"; |
| } |
| |
| @Override |
| public MatchAllDocsQueryNode cloneTree() throws CloneNotSupportedException { |
| MatchAllDocsQueryNode clone = (MatchAllDocsQueryNode) super.cloneTree(); |
| |
| // nothing to clone |
| |
| return clone; |
| } |
| } |