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* this work for additional information regarding copyright
* ownership. Elasticsearch 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.
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package org.elasticsearch.index.query;
import org.apache.lucene.search.*;
import org.apache.lucene.spatial.prefix.PrefixTreeStrategy;
import org.apache.lucene.spatial.prefix.RecursivePrefixTreeStrategy;
import org.apache.lucene.spatial.query.SpatialArgs;
import org.apache.lucene.spatial.query.SpatialOperation;
import org.elasticsearch.action.get.GetRequest;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.geo.ShapeRelation;
import org.elasticsearch.common.geo.builders.ShapeBuilder;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.mapper.FieldMapper;
import org.elasticsearch.index.mapper.MappedFieldType;
import org.elasticsearch.index.mapper.geo.GeoShapeFieldMapper;
import org.elasticsearch.index.search.shape.ShapeFetchService;
import org.elasticsearch.search.internal.SearchContext;
import java.io.IOException;
public class GeoShapeQueryParser implements QueryParser {
public static final String NAME = "geo_shape";
private ShapeFetchService fetchService;
public static class DEFAULTS {
public static final String INDEX_NAME = "shapes";
public static final String SHAPE_FIELD_NAME = "shape";
}
@Override
public String[] names() {
return new String[]{NAME};
}
@Override
public Query parse(QueryParseContext parseContext) throws IOException, QueryParsingException {
XContentParser parser = parseContext.parser();
String fieldName = null;
ShapeRelation shapeRelation = ShapeRelation.INTERSECTS;
String strategyName = null;
ShapeBuilder shape = null;
String id = null;
String type = null;
String index = DEFAULTS.INDEX_NAME;
String shapePath = DEFAULTS.SHAPE_FIELD_NAME;
XContentParser.Token token;
String currentFieldName = null;
float boost = 1f;
String queryName = null;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token == XContentParser.Token.START_OBJECT) {
fieldName = currentFieldName;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
token = parser.nextToken();
if ("shape".equals(currentFieldName)) {
shape = ShapeBuilder.parse(parser);
} else if ("strategy".equals(currentFieldName)) {
strategyName = parser.text();
} else if ("relation".equals(currentFieldName)) {
shapeRelation = ShapeRelation.getRelationByName(parser.text());
if (shapeRelation == null) {
throw new QueryParsingException(parseContext, "Unknown shape operation [" + parser.text() + " ]");
}
} else if ("indexed_shape".equals(currentFieldName) || "indexedShape".equals(currentFieldName)) {
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token.isValue()) {
if ("id".equals(currentFieldName)) {
id = parser.text();
} else if ("type".equals(currentFieldName)) {
type = parser.text();
} else if ("index".equals(currentFieldName)) {
index = parser.text();
} else if ("path".equals(currentFieldName)) {
shapePath = parser.text();
}
}
}
if (id == null) {
throw new QueryParsingException(parseContext, "ID for indexed shape not provided");
} else if (type == null) {
throw new QueryParsingException(parseContext, "Type for indexed shape not provided");
}
GetRequest getRequest = new GetRequest(index, type, id);
getRequest.copyContextAndHeadersFrom(SearchContext.current());
shape = fetchService.fetch(getRequest, shapePath);
} else {
throw new QueryParsingException(parseContext, "[geo_shape] query does not support [" + currentFieldName + "]");
}
}
}
} else if (token.isValue()) {
if ("boost".equals(currentFieldName)) {
boost = parser.floatValue();
} else if ("_name".equals(currentFieldName)) {
queryName = parser.text();
} else {
throw new QueryParsingException(parseContext, "[geo_shape] query does not support [" + currentFieldName + "]");
}
}
}
if (shape == null) {
throw new QueryParsingException(parseContext, "No Shape defined");
} else if (shapeRelation == null) {
throw new QueryParsingException(parseContext, "No Shape Relation defined");
}
MappedFieldType fieldType = parseContext.fieldMapper(fieldName);
if (fieldType == null) {
throw new QueryParsingException(parseContext, "Failed to find geo_shape field [" + fieldName + "]");
}
// TODO: This isn't the nicest way to check this
if (!(fieldType instanceof GeoShapeFieldMapper.GeoShapeFieldType)) {
throw new QueryParsingException(parseContext, "Field [" + fieldName + "] is not a geo_shape");
}
GeoShapeFieldMapper.GeoShapeFieldType shapeFieldType = (GeoShapeFieldMapper.GeoShapeFieldType) fieldType;
PrefixTreeStrategy strategy = shapeFieldType.defaultStrategy();
if (strategyName != null) {
strategy = shapeFieldType.resolveStrategy(strategyName);
}
Query query;
if (strategy instanceof RecursivePrefixTreeStrategy && shapeRelation == ShapeRelation.DISJOINT) {
// this strategy doesn't support disjoint anymore: but it did before, including creating lucene fieldcache (!)
// in this case, execute disjoint as exists && !intersects
BooleanQuery.Builder bool = new BooleanQuery.Builder();
Query exists = ExistsQueryParser.newFilter(parseContext, fieldName, null);
Query intersects = strategy.makeQuery(getArgs(shape, ShapeRelation.INTERSECTS));
bool.add(exists, BooleanClause.Occur.MUST);
bool.add(intersects, BooleanClause.Occur.MUST_NOT);
query = new ConstantScoreQuery(bool.build());
} else {
query = new ConstantScoreQuery(strategy.makeQuery(getArgs(shape, shapeRelation)));
}
query.setBoost(boost);
if (queryName != null) {
parseContext.addNamedQuery(queryName, query);
}
return query;
}
@Inject(optional = true)
public void setFetchService(@Nullable ShapeFetchService fetchService) {
this.fetchService = fetchService;
}
public static SpatialArgs getArgs(ShapeBuilder shape, ShapeRelation relation) {
switch(relation) {
case DISJOINT:
return new SpatialArgs(SpatialOperation.IsDisjointTo, shape.build());
case INTERSECTS:
return new SpatialArgs(SpatialOperation.Intersects, shape.build());
case WITHIN:
return new SpatialArgs(SpatialOperation.IsWithin, shape.build());
case CONTAINS:
return new SpatialArgs(SpatialOperation.Contains, shape.build());
default:
throw new IllegalArgumentException("");
}
}
}