+++ /dev/null
-package org.apache.lucene.queryParser.core.nodes;
-
-/**
- * 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.QueryNodeError;
-import org.apache.lucene.queryParser.core.QueryNodeException;
-import org.apache.lucene.queryParser.core.messages.QueryParserMessages;
-import org.apache.lucene.queryParser.core.parser.EscapeQuerySyntax;
-
-/**
- * A {@link BoostQueryNode} boosts the QueryNode tree which is under this node.
- * So, it must only and always have one child.
- *
- * The boost value may vary from 0.0 to 1.0.
- *
- */
-public class BoostQueryNode extends QueryNodeImpl {
-
- private static final long serialVersionUID = -3929082630855807593L;
-
- private float value = 0;
-
- /**
- * Constructs a boost node
- *
- * @param query
- * the query to be boosted
- * @param value
- * the boost value, it may vary from 0.0 to 1.0
- *
- * @throws QueryNodeException
- */
- public BoostQueryNode(QueryNode query, float value) throws QueryNodeException {
- if (query == null) {
- throw new QueryNodeError(new MessageImpl(
- QueryParserMessages.NODE_ACTION_NOT_SUPPORTED, "query", "null"));
- }
-
- this.value = value;
- setLeaf(false);
- allocate();
- add(query);
- }
-
- /**
- * Returns the single child which this node boosts.
- *
- * @return the single child which this node boosts
- */
- public QueryNode getChild() {
- List<QueryNode> children = getChildren();
-
- if (children == null || children.size() == 0) {
- return null;
- }
-
- return children.get(0);
-
- }
-
- /**
- * Returns the boost value. It may vary from 0.0 to 1.0.
- *
- * @return the boost value
- */
- public float getValue() {
- return this.value;
- }
-
- /**
- * Returns the boost value parsed to a string.
- *
- * @return the parsed value
- */
- private CharSequence getValueString() {
- Float f = Float.valueOf(this.value);
- if (f == f.longValue())
- return "" + f.longValue();
- else
- return "" + f;
-
- }
-
- @Override
- public String toString() {
- return "<boost value='" + getValueString() + "'>" + "\n"
- + getChild().toString() + "\n</boost>";
- }
-
- public CharSequence toQueryString(EscapeQuerySyntax escapeSyntaxParser) {
- if (getChild() == null)
- return "";
- return getChild().toQueryString(escapeSyntaxParser) + "^"
- + getValueString();
- }
-
- @Override
- public QueryNode cloneTree() throws CloneNotSupportedException {
- BoostQueryNode clone = (BoostQueryNode) super.cloneTree();
-
- clone.value = this.value;
-
- return clone;
- }
-
-}