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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* 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.
*/
package org.elasticsearch.search.aggregations.support;
import org.apache.lucene.util.BytesRef;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.geo.GeoPoint;
import org.elasticsearch.common.geo.GeoUtils;
import org.elasticsearch.common.util.BigArrays;
import org.elasticsearch.index.fielddata.IndexFieldData;
import org.elasticsearch.index.fielddata.IndexGeoPointFieldData;
import org.elasticsearch.index.fielddata.IndexNumericFieldData;
import org.elasticsearch.index.fielddata.IndexOrdinalsFieldData;
import org.elasticsearch.index.fielddata.plain.ParentChildIndexFieldData;
import org.elasticsearch.search.SearchParseException;
import org.elasticsearch.search.aggregations.AggregationExecutionException;
import org.elasticsearch.search.internal.SearchContext;
import org.joda.time.DateTimeZone;
import java.io.IOException;
public class AggregationContext {
private final SearchContext searchContext;
public AggregationContext(SearchContext searchContext) {
this.searchContext = searchContext;
}
public SearchContext searchContext() {
return searchContext;
}
public BigArrays bigArrays() {
return searchContext.bigArrays();
}
/** Get a value source given its configuration. A return value of null indicates that
* no value source could be built. */
@Nullable
public <VS extends ValuesSource> VS valuesSource(ValuesSourceConfig<VS> config, SearchContext context) throws IOException {
if (!config.valid()) {
throw new IllegalStateException(
"value source config is invalid; must have either a field context or a script or marked as unwrapped");
}
final VS vs;
if (config.unmapped()) {
if (config.missing() == null) {
// otherwise we will have values because of the missing value
vs = null;
} else if (config.valueSourceType() == ValuesSourceType.NUMERIC) {
vs = (VS) ValuesSource.Numeric.EMPTY;
} else if (config.valueSourceType() == ValuesSourceType.GEOPOINT) {
vs = (VS) ValuesSource.GeoPoint.EMPTY;
} else if (config.valueSourceType() == ValuesSourceType.ANY || config.valueSourceType() == ValuesSourceType.BYTES) {
vs = (VS) ValuesSource.Bytes.WithOrdinals.EMPTY;
} else {
throw new SearchParseException(searchContext, "Can't deal with unmapped ValuesSource type "
+ config.valueSourceType(), null);
}
} else {
vs = originalValuesSource(config);
}
if (config.missing() == null) {
return vs;
}
if (vs instanceof ValuesSource.Bytes) {
final BytesRef missing = new BytesRef(config.missing().toString());
if (vs instanceof ValuesSource.Bytes.WithOrdinals) {
return (VS) MissingValues.replaceMissing((ValuesSource.Bytes.WithOrdinals) vs, missing);
} else {
return (VS) MissingValues.replaceMissing((ValuesSource.Bytes) vs, missing);
}
} else if (vs instanceof ValuesSource.Numeric) {
Number missing = null;
if (config.missing() instanceof Number) {
missing = (Number) config.missing();
} else {
if (config.fieldContext() != null && config.fieldContext().fieldType() != null) {
missing = config.fieldContext().fieldType().docValueFormat(null, DateTimeZone.UTC)
.parseDouble(config.missing().toString(), false, context::nowInMillis);
} else {
missing = Double.parseDouble(config.missing().toString());
}
}
return (VS) MissingValues.replaceMissing((ValuesSource.Numeric) vs, missing);
} else if (vs instanceof ValuesSource.GeoPoint) {
// TODO: also support the structured formats of geo points
final GeoPoint missing = GeoUtils.parseGeoPoint(config.missing().toString(), new GeoPoint());
return (VS) MissingValues.replaceMissing((ValuesSource.GeoPoint) vs, missing);
} else {
// Should not happen
throw new SearchParseException(searchContext, "Can't apply missing values on a " + vs.getClass(), null);
}
}
/**
* Return the original values source, before we apply `missing`.
*/
private <VS extends ValuesSource> VS originalValuesSource(ValuesSourceConfig<VS> config) throws IOException {
if (config.fieldContext() == null) {
if (config.valueSourceType() == ValuesSourceType.NUMERIC) {
return (VS) numericScript(config);
}
if (config.valueSourceType() == ValuesSourceType.BYTES) {
return (VS) bytesScript(config);
}
throw new AggregationExecutionException("value source of type [" + config.valueSourceType().name()
+ "] is not supported by scripts");
}
if (config.valueSourceType() == ValuesSourceType.NUMERIC) {
return (VS) numericField(config);
}
if (config.valueSourceType() == ValuesSourceType.GEOPOINT) {
return (VS) geoPointField(config);
}
// falling back to bytes values
return (VS) bytesField(config);
}
private ValuesSource.Numeric numericScript(ValuesSourceConfig<?> config) throws IOException {
return new ValuesSource.Numeric.Script(config.script(), config.scriptValueType());
}
private ValuesSource.Numeric numericField(ValuesSourceConfig<?> config) throws IOException {
if (!(config.fieldContext().indexFieldData() instanceof IndexNumericFieldData)) {
throw new IllegalArgumentException("Expected numeric type on field [" + config.fieldContext().field() +
"], but got [" + config.fieldContext().fieldType().typeName() + "]");
}
ValuesSource.Numeric dataSource = new ValuesSource.Numeric.FieldData((IndexNumericFieldData)config.fieldContext().indexFieldData());
if (config.script() != null) {
dataSource = new ValuesSource.Numeric.WithScript(dataSource, config.script());
}
return dataSource;
}
private ValuesSource bytesField(ValuesSourceConfig<?> config) throws IOException {
final IndexFieldData<?> indexFieldData = config.fieldContext().indexFieldData();
ValuesSource dataSource;
if (indexFieldData instanceof ParentChildIndexFieldData) {
dataSource = new ValuesSource.Bytes.WithOrdinals.ParentChild((ParentChildIndexFieldData) indexFieldData);
} else if (indexFieldData instanceof IndexOrdinalsFieldData) {
dataSource = new ValuesSource.Bytes.WithOrdinals.FieldData((IndexOrdinalsFieldData) indexFieldData);
} else {
dataSource = new ValuesSource.Bytes.FieldData(indexFieldData);
}
if (config.script() != null) {
dataSource = new ValuesSource.WithScript(dataSource, config.script());
}
return dataSource;
}
private ValuesSource.Bytes bytesScript(ValuesSourceConfig<?> config) throws IOException {
return new ValuesSource.Bytes.Script(config.script());
}
private ValuesSource.GeoPoint geoPointField(ValuesSourceConfig<?> config) throws IOException {
if (!(config.fieldContext().indexFieldData() instanceof IndexGeoPointFieldData)) {
throw new IllegalArgumentException("Expected geo_point type on field [" + config.fieldContext().field() +
"], but got [" + config.fieldContext().fieldType().typeName() + "]");
}
return new ValuesSource.GeoPoint.Fielddata((IndexGeoPointFieldData) config.fieldContext().indexFieldData());
}
}
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