/**
* Copyright 2014 National University of Ireland, Galway.
*
* This file is part of the SIREn project. Project and contact information:
*
* https://github.com/rdelbru/SIREn
*
* Licensed 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.sindice.siren.qparser.keyword.builders;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.document.FieldType.NumericType;
import org.apache.lucene.queryparser.flexible.core.QueryNodeException;
import org.apache.lucene.queryparser.flexible.core.messages.QueryParserMessages;
import org.apache.lucene.queryparser.flexible.core.nodes.QueryNode;
import org.apache.lucene.queryparser.flexible.messages.MessageImpl;
import org.apache.lucene.queryparser.flexible.standard.builders.NumericRangeQueryNodeBuilder;
import org.apache.lucene.queryparser.flexible.standard.config.NumericConfig;
import org.apache.lucene.queryparser.flexible.standard.nodes.NumericQueryNode;
import org.sindice.siren.analysis.NumericAnalyzer;
import org.sindice.siren.qparser.keyword.nodes.NodeNumericRangeQueryNode;
import org.sindice.siren.search.node.NodeNumericRangeQuery;
/**
* Builds a {@link NodeNumericRangeQuery} object from a
* {@link NodeNumericRangeQueryNode} object.
*
* <p>
*
* Class copied from {@link NumericRangeQueryNodeBuilder} for the Siren use case:
* in Siren, we use an {@link Analyzer} instead of a {@link NumericConfig}
* configuration object.
*/
public class NodeNumericRangeQueryNodeBuilder implements KeywordQueryBuilder {
/**
* Constructs a {@link NodeNumericRangeQueryNodeBuilder} object.
*/
public NodeNumericRangeQueryNodeBuilder() {
// empty constructor
}
public NodeNumericRangeQuery<? extends Number> build(final QueryNode queryNode)
throws QueryNodeException {
final NodeNumericRangeQueryNode numericRangeNode = (NodeNumericRangeQueryNode) queryNode;
final NumericQueryNode lowerNumericNode = numericRangeNode.getLowerBound();
final NumericQueryNode upperNumericNode = numericRangeNode.getUpperBound();
final Number lowerNumber, upperNumber;
if (lowerNumericNode != null) {
lowerNumber = lowerNumericNode.getValue();
}
else {
lowerNumber = null;
}
if (upperNumericNode != null) {
upperNumber = upperNumericNode.getValue();
}
else {
upperNumber = null;
}
final NumericAnalyzer numericAnalyzer = numericRangeNode.getNumericAnalyzer();
final NumericType numberType = numericRangeNode.getNumericType();
final String field = numericRangeNode.getField().toString();
final boolean minInclusive = numericRangeNode.isLowerInclusive();
final boolean maxInclusive = numericRangeNode.isUpperInclusive();
final int precisionStep = numericAnalyzer.getPrecisionStep();
switch (numberType) {
case LONG:
return NodeNumericRangeQuery.newLongRange(field, precisionStep,
(Long) lowerNumber, (Long) upperNumber, minInclusive, maxInclusive);
case INT:
return NodeNumericRangeQuery.newIntRange(field, precisionStep,
(Integer) lowerNumber, (Integer) upperNumber, minInclusive,
maxInclusive);
case FLOAT:
return NodeNumericRangeQuery.newFloatRange(field, precisionStep,
(Float) lowerNumber, (Float) upperNumber, minInclusive, maxInclusive);
case DOUBLE:
return NodeNumericRangeQuery.newDoubleRange(field, precisionStep,
(Double) lowerNumber, (Double) upperNumber, minInclusive,
maxInclusive);
default:
throw new QueryNodeException(new MessageImpl(QueryParserMessages.UNSUPPORTED_NUMERIC_DATA_TYPE, numberType));
}
}
}