| /* |
| * 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; |
| |
| import java.util.List; |
| |
| |
| /** |
| * A {@link BooleanQueryNode} represents a list of elements which do not have an |
| * explicit boolean operator defined between them. It can be used to express a |
| * boolean query that intends to use the default boolean operator. |
| */ |
| public class BooleanQueryNode extends QueryNodeImpl { |
| |
| /** |
| * @param clauses |
| * - the query nodes to be and'ed |
| */ |
| public BooleanQueryNode(List<QueryNode> clauses) { |
| setLeaf(false); |
| allocate(); |
| set(clauses); |
| } |
| |
| @Override |
| public String toString() { |
| if (getChildren() == null || getChildren().size() == 0) |
| return "<boolean operation='default'/>"; |
| StringBuilder sb = new StringBuilder(); |
| sb.append("<boolean operation='default'>"); |
| for (QueryNode child : getChildren()) { |
| sb.append("\n"); |
| sb.append(child.toString()); |
| } |
| sb.append("\n</boolean>"); |
| return sb.toString(); |
| } |
| |
| @Override |
| public CharSequence toQueryString(EscapeQuerySyntax escapeSyntaxParser) { |
| if (getChildren() == null || getChildren().size() == 0) |
| return ""; |
| |
| StringBuilder sb = new StringBuilder(); |
| String filler = ""; |
| for (QueryNode child : getChildren()) { |
| sb.append(filler).append(child.toQueryString(escapeSyntaxParser)); |
| filler = " "; |
| } |
| |
| // in case is root or the parent is a group node avoid parenthesis |
| if ((getParent() != null && getParent() instanceof GroupQueryNode) |
| || isRoot()) |
| return sb.toString(); |
| else |
| return "( " + sb.toString() + " )"; |
| } |
| |
| @Override |
| public QueryNode cloneTree() throws CloneNotSupportedException { |
| BooleanQueryNode clone = (BooleanQueryNode) super.cloneTree(); |
| |
| // nothing to do here |
| |
| return clone; |
| } |
| |
| } |