X-Git-Url: https://git.mdrn.pl/pylucene.git/blobdiff_plain/a2e61f0c04805cfcb8706176758d1283c7e3a55c..aaeed5504b982cf3545252ab528713250aa33eed:/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/standard/builders/BooleanQueryNodeBuilder.java?ds=sidebyside
diff --git a/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/standard/builders/BooleanQueryNodeBuilder.java b/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/standard/builders/BooleanQueryNodeBuilder.java
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+++ b/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/standard/builders/BooleanQueryNodeBuilder.java
@@ -0,0 +1,110 @@
+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.BooleanQueryNode;
+import org.apache.lucene.queryParser.core.nodes.ModifierQueryNode;
+import org.apache.lucene.queryParser.core.nodes.QueryNode;
+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.BooleanQuery.TooManyClauses;
+
+/**
+ * Builds a {@link BooleanQuery} object from a {@link BooleanQueryNode} object.
+ * Every children in the {@link BooleanQueryNode} object must be already tagged
+ * using {@link QueryTreeBuilder#QUERY_TREE_BUILDER_TAGID} with a {@link Query}
+ * object.
+ *
+ * It takes in consideration if the children is a {@link ModifierQueryNode} to
+ * define the {@link BooleanClause}.
+ */
+public class BooleanQueryNodeBuilder implements StandardQueryBuilder {
+
+ public BooleanQueryNodeBuilder() {
+ // empty constructor
+ }
+
+ public BooleanQuery build(QueryNode queryNode) throws QueryNodeException {
+ BooleanQueryNode booleanNode = (BooleanQueryNode) queryNode;
+
+ BooleanQuery bQuery = new BooleanQuery();
+ List 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);
+ switch (mNode.getModifier()) {
+
+ case MOD_REQ:
+ return BooleanClause.Occur.MUST;
+
+ case MOD_NOT:
+ return BooleanClause.Occur.MUST_NOT;
+
+ case MOD_NONE:
+ return BooleanClause.Occur.SHOULD;
+
+ }
+
+ }
+
+ return BooleanClause.Occur.SHOULD;
+
+ }
+
+}