| package org.apache.lucene.queryParser.standard.builders; |
| |
| /** |
| * 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. |
| */ |
| |
| import java.util.List; |
| |
| import org.apache.lucene.messages.MessageImpl; |
| import org.apache.lucene.queryParser.core.QueryNodeException; |
| import org.apache.lucene.queryParser.core.builders.QueryTreeBuilder; |
| import org.apache.lucene.queryParser.core.messages.QueryParserMessages; |
| import org.apache.lucene.queryParser.core.nodes.ModifierQueryNode; |
| import org.apache.lucene.queryParser.core.nodes.QueryNode; |
| import org.apache.lucene.queryParser.core.nodes.ModifierQueryNode.Modifier; |
| import org.apache.lucene.queryParser.standard.nodes.StandardBooleanQueryNode; |
| import org.apache.lucene.queryParser.standard.parser.EscapeQuerySyntaxImpl; |
| import org.apache.lucene.search.BooleanClause; |
| import org.apache.lucene.search.BooleanQuery; |
| import org.apache.lucene.search.Query; |
| import org.apache.lucene.search.Similarity; |
| import org.apache.lucene.search.BooleanQuery.TooManyClauses; |
| |
| /** |
| * This builder does the same as the {@link BooleanQueryNodeBuilder}, but this |
| * considers if the built {@link BooleanQuery} should have its coord disabled or |
| * not. <br/> |
| * |
| * @see BooleanQueryNodeBuilder |
| * @see BooleanQuery |
| * @see Similarity#coord(int, int) |
| */ |
| public class StandardBooleanQueryNodeBuilder implements StandardQueryBuilder { |
| |
| public StandardBooleanQueryNodeBuilder() { |
| // empty constructor |
| } |
| |
| public BooleanQuery build(QueryNode queryNode) throws QueryNodeException { |
| StandardBooleanQueryNode booleanNode = (StandardBooleanQueryNode) queryNode; |
| |
| BooleanQuery bQuery = new BooleanQuery(booleanNode.isDisableCoord()); |
| List<QueryNode> children = booleanNode.getChildren(); |
| |
| if (children != null) { |
| |
| for (QueryNode child : children) { |
| Object obj = child.getTag(QueryTreeBuilder.QUERY_TREE_BUILDER_TAGID); |
| |
| if (obj != null) { |
| Query query = (Query) obj; |
| |
| try { |
| bQuery.add(query, getModifierValue(child)); |
| } catch (TooManyClauses ex) { |
| |
| throw new QueryNodeException(new MessageImpl( |
| QueryParserMessages.TOO_MANY_BOOLEAN_CLAUSES, BooleanQuery |
| .getMaxClauseCount(), queryNode |
| .toQueryString(new EscapeQuerySyntaxImpl())), ex); |
| |
| } |
| |
| } |
| |
| } |
| |
| } |
| |
| return bQuery; |
| |
| } |
| |
| private static BooleanClause.Occur getModifierValue(QueryNode node) |
| throws QueryNodeException { |
| |
| if (node instanceof ModifierQueryNode) { |
| ModifierQueryNode mNode = ((ModifierQueryNode) node); |
| Modifier modifier = mNode.getModifier(); |
| |
| if (Modifier.MOD_NONE.equals(modifier)) { |
| return BooleanClause.Occur.SHOULD; |
| |
| } else if (Modifier.MOD_NOT.equals(modifier)) { |
| return BooleanClause.Occur.MUST_NOT; |
| |
| } else { |
| return BooleanClause.Occur.MUST; |
| } |
| } |
| |
| return BooleanClause.Occur.SHOULD; |
| |
| } |
| |
| } |