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//
// 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.apache.couchdb.nouveau.lucene9;
import java.text.NumberFormat;
import java.text.ParseException;
import java.util.List;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.queryparser.flexible.core.QueryNodeException;
import org.apache.lucene.queryparser.flexible.core.QueryParserHelper;
import org.apache.lucene.queryparser.flexible.core.nodes.FieldQueryNode;
import org.apache.lucene.queryparser.flexible.core.nodes.QueryNode;
import org.apache.lucene.queryparser.flexible.core.nodes.RangeQueryNode;
import org.apache.lucene.queryparser.flexible.core.processors.NoChildOptimizationQueryNodeProcessor;
import org.apache.lucene.queryparser.flexible.core.processors.QueryNodeProcessorImpl;
import org.apache.lucene.queryparser.flexible.core.processors.QueryNodeProcessorPipeline;
import org.apache.lucene.queryparser.flexible.core.processors.RemoveDeletedQueryNodesProcessor;
import org.apache.lucene.queryparser.flexible.standard.builders.StandardQueryTreeBuilder;
import org.apache.lucene.queryparser.flexible.standard.config.PointsConfig;
import org.apache.lucene.queryparser.flexible.standard.config.StandardQueryConfigHandler;
import org.apache.lucene.queryparser.flexible.standard.config.StandardQueryConfigHandler.ConfigurationKeys;
import org.apache.lucene.queryparser.flexible.standard.nodes.PointQueryNode;
import org.apache.lucene.queryparser.flexible.standard.nodes.PointRangeQueryNode;
import org.apache.lucene.queryparser.flexible.standard.nodes.TermRangeQueryNode;
import org.apache.lucene.queryparser.flexible.standard.parser.StandardSyntaxParser;
import org.apache.lucene.queryparser.flexible.standard.processors.AllowLeadingWildcardProcessor;
import org.apache.lucene.queryparser.flexible.standard.processors.AnalyzerQueryNodeProcessor;
import org.apache.lucene.queryparser.flexible.standard.processors.BooleanQuery2ModifierNodeProcessor;
import org.apache.lucene.queryparser.flexible.standard.processors.BooleanSingleChildOptimizationQueryNodeProcessor;
import org.apache.lucene.queryparser.flexible.standard.processors.BoostQueryNodeProcessor;
import org.apache.lucene.queryparser.flexible.standard.processors.DefaultPhraseSlopQueryNodeProcessor;
import org.apache.lucene.queryparser.flexible.standard.processors.FuzzyQueryNodeProcessor;
import org.apache.lucene.queryparser.flexible.standard.processors.IntervalQueryNodeProcessor;
import org.apache.lucene.queryparser.flexible.standard.processors.MatchAllDocsQueryNodeProcessor;
import org.apache.lucene.queryparser.flexible.standard.processors.MultiFieldQueryNodeProcessor;
import org.apache.lucene.queryparser.flexible.standard.processors.MultiTermRewriteMethodProcessor;
import org.apache.lucene.queryparser.flexible.standard.processors.OpenRangeQueryNodeProcessor;
import org.apache.lucene.queryparser.flexible.standard.processors.PhraseSlopQueryNodeProcessor;
import org.apache.lucene.queryparser.flexible.standard.processors.RegexpQueryNodeProcessor;
import org.apache.lucene.queryparser.flexible.standard.processors.RemoveEmptyNonLeafQueryNodeProcessor;
import org.apache.lucene.queryparser.flexible.standard.processors.TermRangeQueryNodeProcessor;
import org.apache.lucene.queryparser.flexible.standard.processors.WildcardQueryNodeProcessor;
import org.apache.lucene.search.Query;
public final class NouveauQueryParser extends QueryParserHelper {
public NouveauQueryParser(final Analyzer analyzer) {
super(
new StandardQueryConfigHandler(),
new StandardSyntaxParser(),
new NouveauQueryNodeProcessorPipeline(),
new StandardQueryTreeBuilder());
getQueryConfigHandler().set(ConfigurationKeys.ENABLE_POSITION_INCREMENTS, true);
getQueryConfigHandler().set(ConfigurationKeys.ANALYZER, analyzer);
}
@Override
public Query parse(String query, String defaultField) throws QueryNodeException {
return (Query) super.parse(query, defaultField);
}
/**
* Same pipeline as StandardQueryParser but we substitute
* PointQueryNodeProcessor and PointRangeQueryNodeProcessor for
* NouveauPointProcessor below.
*/
public static class NouveauQueryNodeProcessorPipeline extends QueryNodeProcessorPipeline {
public NouveauQueryNodeProcessorPipeline() {
super(null);
add(new WildcardQueryNodeProcessor());
add(new MultiFieldQueryNodeProcessor());
add(new FuzzyQueryNodeProcessor());
add(new RegexpQueryNodeProcessor());
add(new MatchAllDocsQueryNodeProcessor());
add(new OpenRangeQueryNodeProcessor());
add(new NouveauPointProcessor());
add(new TermRangeQueryNodeProcessor());
add(new AllowLeadingWildcardProcessor());
add(new AnalyzerQueryNodeProcessor());
add(new PhraseSlopQueryNodeProcessor());
add(new BooleanQuery2ModifierNodeProcessor());
add(new NoChildOptimizationQueryNodeProcessor());
add(new RemoveDeletedQueryNodesProcessor());
add(new RemoveEmptyNonLeafQueryNodeProcessor());
add(new BooleanSingleChildOptimizationQueryNodeProcessor());
add(new DefaultPhraseSlopQueryNodeProcessor());
add(new BoostQueryNodeProcessor());
add(new MultiTermRewriteMethodProcessor());
add(new IntervalQueryNodeProcessor());
}
}
/**
* If it looks like a number, treat it as a number.
*/
public static class NouveauPointProcessor extends QueryNodeProcessorImpl {
@Override
protected QueryNode postProcessNode(final QueryNode node) throws QueryNodeException {
final var numberFormat = NumberFormat.getInstance();
final var pointsConfig = new PointsConfig(numberFormat, Double.class);
if (node instanceof FieldQueryNode && !(node.getParent() instanceof RangeQueryNode)) {
final var fieldNode = (FieldQueryNode) node;
String text = fieldNode.getTextAsString();
if (text.length() == 0) {
return node;
}
final Number number;
try {
number = numberFormat.parse(text).doubleValue();
} catch (final ParseException e) {
return node;
}
final var lowerNode = new PointQueryNode(fieldNode.getField(), number, numberFormat);
final var upperNode = new PointQueryNode(fieldNode.getField(), number, numberFormat);
return new PointRangeQueryNode(lowerNode, upperNode, true, true, pointsConfig);
}
if (node instanceof TermRangeQueryNode) {
final var termRangeNode = (TermRangeQueryNode) node;
final var lower = termRangeNode.getLowerBound();
final var upper = termRangeNode.getUpperBound();
final var lowerText = lower.getTextAsString();
final var upperText = upper.getTextAsString();
Number lowerNumber = null, upperNumber = null;
if (lowerText.length() > 0 && !lowerText.equals("-Infinity")) {
try {
lowerNumber = numberFormat.parse(lowerText).doubleValue();
} catch (final ParseException e) {
return node;
}
}
if (upperText.length() > 0 && !upperText.equals("Infinity")) {
try {
upperNumber = numberFormat.parse(upperText).doubleValue();
} catch (final ParseException e) {
return node;
}
}
final var lowerNode = new PointQueryNode(termRangeNode.getField(), lowerNumber, numberFormat);
final var upperNode = new PointQueryNode(termRangeNode.getField(), upperNumber, numberFormat);
final var lowerInclusive = termRangeNode.isLowerInclusive();
final var upperInclusive = termRangeNode.isUpperInclusive();
return new PointRangeQueryNode(
lowerNode, upperNode, lowerInclusive, upperInclusive, pointsConfig);
}
return node;
}
@Override
protected QueryNode preProcessNode(final QueryNode node) throws QueryNodeException {
return node;
}
@Override
protected List<QueryNode> setChildrenOrder(final List<QueryNode> children) throws QueryNodeException {
return children;
}
}
}
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