honeymoose
/
OpenSearch
mirror of https://github.com/honeymoose/OpenSearch.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

refactor custom sort parsing to be "code" pluggable

This commit is contained in:
kimchy 2010-08-09 08:57:56 +03:00
parent ff8d743337
commit 6611e7db44
6 changed files with 375 additions and 279 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
modules/elasticsearch/src/main/java/org/elasticsearch/search/query/QueryPhase.java
View File

@ -33,6 +33,7 @@ import org.elasticsearch.search.SearchParseException;
import org.elasticsearch.search.SearchPhase;
import org.elasticsearch.search.facets.FacetsPhase;
import org.elasticsearch.search.internal.SearchContext;
import org.elasticsearch.search.sort.SortParseElement;
import java.util.Map;

279
modules/elasticsearch/src/main/java/org/elasticsearch/search/query/SortParseElement.java
View File

@ -1,279 +0,0 @@
/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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.query;
import org.apache.lucene.search.FieldComparatorSource;
import org.apache.lucene.search.Sort;
import org.apache.lucene.search.SortField;
import org.elasticsearch.common.collect.Lists;
import org.elasticsearch.common.lucene.geo.GeoDistance;
import org.elasticsearch.common.lucene.geo.GeoDistanceDataComparator;
import org.elasticsearch.common.lucene.geo.GeoHashUtils;
import org.elasticsearch.common.unit.DistanceUnit;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.field.function.FieldsFunction;
import org.elasticsearch.index.field.function.script.ScriptFieldsFunction;
import org.elasticsearch.index.field.function.sort.DoubleFieldsFunctionDataComparator;
import org.elasticsearch.index.field.function.sort.StringFieldsFunctionDataComparator;
import org.elasticsearch.index.mapper.FieldMapper;
import org.elasticsearch.index.mapper.xcontent.XContentGeoPointFieldMapper;
import org.elasticsearch.search.SearchParseElement;
import org.elasticsearch.search.SearchParseException;
import org.elasticsearch.search.internal.SearchContext;
import java.io.IOException;
import java.util.List;
import java.util.Map;
/**
* @author kimchy (shay.banon)
*/
public class SortParseElement implements SearchParseElement {
private static final SortField SORT_SCORE = new SortField(null, SortField.SCORE);
private static final SortField SORT_SCORE_REVERSE = new SortField(null, SortField.SCORE, true);
private static final SortField SORT_DOC = new SortField(null, SortField.DOC);
private static final SortField SORT_DOC_REVERSE = new SortField(null, SortField.DOC, true);
public static final String SCRIPT_FIELD_NAME = "_script";
public static final String SCORE_FIELD_NAME = "_score";
public static final String DOC_FIELD_NAME = "_doc";
public static final String GEO_DISTANCE_FIELD_NAME = "_geo_distance";
public SortParseElement() {
}
@Override public void parse(XContentParser parser, SearchContext context) throws Exception {
XContentParser.Token token = parser.currentToken();
List<SortField> sortFields = Lists.newArrayListWithCapacity(2);
if (token == XContentParser.Token.START_ARRAY) {
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
if (token == XContentParser.Token.START_OBJECT) {
//TODO move to pluggable parsers, similar to facets. Builders already exists...
addCompoundSortField(parser, context, sortFields);
} else if (token == XContentParser.Token.VALUE_STRING) {
addSortField(context, sortFields, parser.text(), false);
}
}
} else {
addCompoundSortField(parser, context, sortFields);
}
if (!sortFields.isEmpty()) {
context.sort(new Sort(sortFields.toArray(new SortField[sortFields.size()])));
}
}
private void addCompoundSortField(XContentParser parser, SearchContext context, List<SortField> sortFields) throws IOException {
XContentParser.Token token;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
String fieldName = parser.currentName();
boolean reverse = false;
String innerJsonName = null;
token = parser.nextToken();
if (token == XContentParser.Token.VALUE_STRING) {
String direction = parser.text();
if (direction.equals("asc")) {
reverse = SCORE_FIELD_NAME.equals(fieldName);
} else if (direction.equals("desc")) {
reverse = !SCORE_FIELD_NAME.equals(fieldName);
}
addSortField(context, sortFields, fieldName, reverse);
} else if (GEO_DISTANCE_FIELD_NAME.equals(fieldName)) {
addGeoDistanceSortField(parser, context, sortFields);
} else if (SCRIPT_FIELD_NAME.equals(fieldName)) {
addScriptSortField(parser, context, sortFields);
} else {
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
innerJsonName = parser.currentName();
} else if (token.isValue()) {
if ("reverse".equals(innerJsonName)) {
reverse = parser.booleanValue();
} else if ("order".equals(innerJsonName)) {
if ("asc".equals(parser.text())) {
reverse = SCORE_FIELD_NAME.equals(fieldName);
} else if ("desc".equals(parser.text())) {
reverse = !SCORE_FIELD_NAME.equals(fieldName);
}
}
}
}
addSortField(context, sortFields, fieldName, reverse);
}
}
}
}
private void addSortField(SearchContext context, List<SortField> sortFields, String fieldName, boolean reverse) {
if (SCORE_FIELD_NAME.equals(fieldName)) {
if (reverse) {
sortFields.add(SORT_SCORE_REVERSE);
} else {
sortFields.add(SORT_SCORE);
}
} else if (DOC_FIELD_NAME.equals(fieldName)) {
if (reverse) {
sortFields.add(SORT_DOC_REVERSE);
} else {
sortFields.add(SORT_DOC);
}
} else {
FieldMapper fieldMapper = context.mapperService().smartNameFieldMapper(fieldName);
if (fieldMapper == null) {
throw new SearchParseException(context, "No mapping found for [" + fieldName + "]");
}
sortFields.add(new SortField(fieldName, fieldMapper.fieldDataType().newFieldComparatorSource(context.fieldDataCache()), reverse));
}
}
/**
* <pre>
* "_script" : {
* "script" : "doc[...]",
* "order" : "asc"
* }
* </pre>
*/
private void addScriptSortField(XContentParser parser, SearchContext context, List<SortField> sortFields) throws IOException {
String script = null;
String type = null;
Map<String, Object> params = null;
boolean reverse = false;
XContentParser.Token token;
String currentName = parser.currentName();
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentName = parser.currentName();
} else if (token.isValue()) {
if ("reverse".equals(currentName)) {
reverse = parser.booleanValue();
} else if ("order".equals(currentName)) {
reverse = "desc".equals(parser.text());
} else if ("script".equals(currentName)) {
script = parser.text();
} else if ("type".equals(currentName)) {
type = parser.text();
} else if ("params".equals(currentName)) {
params = parser.map();
}
}
}
if (script == null) {
throw new SearchParseException(context, "_script sorting requires setting the script to sort by");
}
if (type == null) {
throw new SearchParseException(context, "_script sorting requires setting the type of the script");
}
FieldsFunction fieldsFunction = new ScriptFieldsFunction(script, context.scriptService(), context.mapperService(), context.fieldDataCache());
FieldComparatorSource fieldComparatorSource;
if ("string".equals(type)) {
fieldComparatorSource = StringFieldsFunctionDataComparator.comparatorSource(fieldsFunction, params);
} else if ("number".equals(type)) {
fieldComparatorSource = DoubleFieldsFunctionDataComparator.comparatorSource(fieldsFunction, params);
} else {
throw new SearchParseException(context, "custom script sort type [" + type + "] not supported");
}
sortFields.add(new SortField("_script", fieldComparatorSource, reverse));
}
/**
* <pre>
* "_geo_distance" : {
* "pin.location" : {
*
* },
* "order" : "asc"
* }
* </pre>
*/
private void addGeoDistanceSortField(XContentParser parser, SearchContext context, List<SortField> sortFields) throws IOException {
String fieldName = null;
double lat = Double.NaN;
double lon = Double.NaN;
DistanceUnit unit = DistanceUnit.KILOMETERS;
GeoDistance geoDistance = GeoDistance.ARC;
boolean reverse = false;
XContentParser.Token token;
String currentName = parser.currentName();
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentName = parser.currentName();
} else if (token == XContentParser.Token.START_ARRAY) {
token = parser.nextToken();
lat = parser.doubleValue();
token = parser.nextToken();
lon = parser.doubleValue();
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
}
fieldName = currentName;
} else if (token == XContentParser.Token.START_OBJECT) {
// the json in the format of -> field : { lat : 30, lon : 12 }
fieldName = currentName;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentName = parser.currentName();
} else if (token.isValue()) {
if (currentName.equals(XContentGeoPointFieldMapper.Names.LAT)) {
lat = parser.doubleValue();
} else if (currentName.equals(XContentGeoPointFieldMapper.Names.LON)) {
lon = parser.doubleValue();
} else if (currentName.equals(XContentGeoPointFieldMapper.Names.GEOHASH)) {
double[] values = GeoHashUtils.decode(parser.text());
lat = values[0];
lon = values[1];
}
}
}
} else if (token.isValue()) {
if ("reverse".equals(currentName)) {
reverse = parser.booleanValue();
} else if ("order".equals(currentName)) {
reverse = "desc".equals(parser.text());
} else if (currentName.equals("unit")) {
unit = DistanceUnit.fromString(parser.text());
} else if (currentName.equals("distance_type") || currentName.equals("distanceType")) {
geoDistance = GeoDistance.fromString(parser.text());
} else {
// assume the value is the actual value
String value = parser.text();
int comma = value.indexOf(',');
if (comma != -1) {
lat = Double.parseDouble(value.substring(0, comma).trim());
lon = Double.parseDouble(value.substring(comma + 1).trim());
} else {
double[] values = GeoHashUtils.decode(value);
lat = values[0];
lon = values[1];
}
fieldName = currentName;
}
}
}
sortFields.add(new SortField(fieldName, GeoDistanceDataComparator.comparatorSource(fieldName, lat, lon, unit, geoDistance, context.fieldDataCache(), context.mapperService()), reverse));
}
}

110
modules/elasticsearch/src/main/java/org/elasticsearch/search/sort/GeoDistanceSortParser.java Normal file
View File

@ -0,0 +1,110 @@
/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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.sort;
import org.apache.lucene.search.SortField;
import org.elasticsearch.common.lucene.geo.GeoDistance;
import org.elasticsearch.common.lucene.geo.GeoDistanceDataComparator;
import org.elasticsearch.common.lucene.geo.GeoHashUtils;
import org.elasticsearch.common.unit.DistanceUnit;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.mapper.xcontent.XContentGeoPointFieldMapper;
import org.elasticsearch.search.internal.SearchContext;
/**
* @author kimchy (shay.banon)
*/
public class GeoDistanceSortParser implements SortParser {
@Override public String[] names() {
return new String[]{"_geo_distance", "_geoDistance"};
}
@Override public SortField parse(XContentParser parser, SearchContext context) throws Exception {
String fieldName = null;
double lat = Double.NaN;
double lon = Double.NaN;
DistanceUnit unit = DistanceUnit.KILOMETERS;
GeoDistance geoDistance = GeoDistance.ARC;
boolean reverse = false;
XContentParser.Token token;
String currentName = parser.currentName();
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentName = parser.currentName();
} else if (token == XContentParser.Token.START_ARRAY) {
token = parser.nextToken();
lat = parser.doubleValue();
token = parser.nextToken();
lon = parser.doubleValue();
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
}
fieldName = currentName;
} else if (token == XContentParser.Token.START_OBJECT) {
// the json in the format of -> field : { lat : 30, lon : 12 }
fieldName = currentName;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentName = parser.currentName();
} else if (token.isValue()) {
if (currentName.equals(XContentGeoPointFieldMapper.Names.LAT)) {
lat = parser.doubleValue();
} else if (currentName.equals(XContentGeoPointFieldMapper.Names.LON)) {
lon = parser.doubleValue();
} else if (currentName.equals(XContentGeoPointFieldMapper.Names.GEOHASH)) {
double[] values = GeoHashUtils.decode(parser.text());
lat = values[0];
lon = values[1];
}
}
}
} else if (token.isValue()) {
if ("reverse".equals(currentName)) {
reverse = parser.booleanValue();
} else if ("order".equals(currentName)) {
reverse = "desc".equals(parser.text());
} else if (currentName.equals("unit")) {
unit = DistanceUnit.fromString(parser.text());
} else if (currentName.equals("distance_type") || currentName.equals("distanceType")) {
geoDistance = GeoDistance.fromString(parser.text());
} else {
// assume the value is the actual value
String value = parser.text();
int comma = value.indexOf(',');
if (comma != -1) {
lat = Double.parseDouble(value.substring(0, comma).trim());
lon = Double.parseDouble(value.substring(comma + 1).trim());
} else {
double[] values = GeoHashUtils.decode(value);
lat = values[0];
lon = values[1];
}
fieldName = currentName;
}
}
}
return new SortField(fieldName, GeoDistanceDataComparator.comparatorSource(fieldName, lat, lon, unit, geoDistance, context.fieldDataCache(), context.mapperService()), reverse);
}
}

86
modules/elasticsearch/src/main/java/org/elasticsearch/search/sort/ScriptSortParser.java Normal file
View File

@ -0,0 +1,86 @@
/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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.sort;
import org.apache.lucene.search.FieldComparatorSource;
import org.apache.lucene.search.SortField;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.field.function.FieldsFunction;
import org.elasticsearch.index.field.function.script.ScriptFieldsFunction;
import org.elasticsearch.index.field.function.sort.DoubleFieldsFunctionDataComparator;
import org.elasticsearch.index.field.function.sort.StringFieldsFunctionDataComparator;
import org.elasticsearch.search.SearchParseException;
import org.elasticsearch.search.internal.SearchContext;
import java.util.Map;
/**
* @author kimchy (shay.banon)
*/
public class ScriptSortParser implements SortParser {
@Override public String[] names() {
return new String[]{"_script"};
}
@Override public SortField parse(XContentParser parser, SearchContext context) throws Exception {
String script = null;
String type = null;
Map<String, Object> params = null;
boolean reverse = false;
XContentParser.Token token;
String currentName = parser.currentName();
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentName = parser.currentName();
} else if (token.isValue()) {
if ("reverse".equals(currentName)) {
reverse = parser.booleanValue();
} else if ("order".equals(currentName)) {
reverse = "desc".equals(parser.text());
} else if ("script".equals(currentName)) {
script = parser.text();
} else if ("type".equals(currentName)) {
type = parser.text();
} else if ("params".equals(currentName)) {
params = parser.map();
}
}
}
if (script == null) {
throw new SearchParseException(context, "_script sorting requires setting the script to sort by");
}
if (type == null) {
throw new SearchParseException(context, "_script sorting requires setting the type of the script");
}
FieldsFunction fieldsFunction = new ScriptFieldsFunction(script, context.scriptService(), context.mapperService(), context.fieldDataCache());
FieldComparatorSource fieldComparatorSource;
if ("string".equals(type)) {
fieldComparatorSource = StringFieldsFunctionDataComparator.comparatorSource(fieldsFunction, params);
} else if ("number".equals(type)) {
fieldComparatorSource = DoubleFieldsFunctionDataComparator.comparatorSource(fieldsFunction, params);
} else {
throw new SearchParseException(context, "custom script sort type [" + type + "] not supported");
}
return new SortField("_script", fieldComparatorSource, reverse);
}
}

144
modules/elasticsearch/src/main/java/org/elasticsearch/search/sort/SortParseElement.java Normal file
View File

@ -0,0 +1,144 @@
/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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.sort;
import org.apache.lucene.search.Sort;
import org.apache.lucene.search.SortField;
import org.elasticsearch.common.collect.ImmutableMap;
import org.elasticsearch.common.collect.Lists;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.mapper.FieldMapper;
import org.elasticsearch.search.SearchParseElement;
import org.elasticsearch.search.SearchParseException;
import org.elasticsearch.search.internal.SearchContext;
import java.util.List;
/**
* @author kimchy (shay.banon)
*/
public class SortParseElement implements SearchParseElement {
private static final SortField SORT_SCORE = new SortField(null, SortField.SCORE);
private static final SortField SORT_SCORE_REVERSE = new SortField(null, SortField.SCORE, true);
private static final SortField SORT_DOC = new SortField(null, SortField.DOC);
private static final SortField SORT_DOC_REVERSE = new SortField(null, SortField.DOC, true);
public static final String SCORE_FIELD_NAME = "_score";
public static final String DOC_FIELD_NAME = "_doc";
private final ImmutableMap<String, SortParser> parsers;
public SortParseElement() {
ImmutableMap.Builder<String, SortParser> builder = ImmutableMap.builder();
addParser(builder, new ScriptSortParser());
addParser(builder, new GeoDistanceSortParser());
this.parsers = builder.build();
}
private void addParser(ImmutableMap.Builder<String, SortParser> parsers, SortParser parser) {
for (String name : parser.names()) {
parsers.put(name, parser);
}
}
@Override public void parse(XContentParser parser, SearchContext context) throws Exception {
XContentParser.Token token = parser.currentToken();
List<SortField> sortFields = Lists.newArrayListWithCapacity(2);
if (token == XContentParser.Token.START_ARRAY) {
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
if (token == XContentParser.Token.START_OBJECT) {
addCompoundSortField(parser, context, sortFields);
} else if (token == XContentParser.Token.VALUE_STRING) {
addSortField(context, sortFields, parser.text(), false);
}
}
} else {
addCompoundSortField(parser, context, sortFields);
}
if (!sortFields.isEmpty()) {
context.sort(new Sort(sortFields.toArray(new SortField[sortFields.size()])));
}
}
private void addCompoundSortField(XContentParser parser, SearchContext context, List<SortField> sortFields) throws Exception {
XContentParser.Token token;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
String fieldName = parser.currentName();
boolean reverse = false;
String innerJsonName = null;
token = parser.nextToken();
if (token == XContentParser.Token.VALUE_STRING) {
String direction = parser.text();
if (direction.equals("asc")) {
reverse = SCORE_FIELD_NAME.equals(fieldName);
} else if (direction.equals("desc")) {
reverse = !SCORE_FIELD_NAME.equals(fieldName);
}
addSortField(context, sortFields, fieldName, reverse);
} else {
if (parsers.containsKey(fieldName)) {
sortFields.add(parsers.get(fieldName).parse(parser, context));
} else {
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
innerJsonName = parser.currentName();
} else if (token.isValue()) {
if ("reverse".equals(innerJsonName)) {
reverse = parser.booleanValue();
} else if ("order".equals(innerJsonName)) {
if ("asc".equals(parser.text())) {
reverse = SCORE_FIELD_NAME.equals(fieldName);
} else if ("desc".equals(parser.text())) {
reverse = !SCORE_FIELD_NAME.equals(fieldName);
}
}
}
}
addSortField(context, sortFields, fieldName, reverse);
}
}
}
}
}
private void addSortField(SearchContext context, List<SortField> sortFields, String fieldName, boolean reverse) {
if (SCORE_FIELD_NAME.equals(fieldName)) {
if (reverse) {
sortFields.add(SORT_SCORE_REVERSE);
} else {
sortFields.add(SORT_SCORE);
}
} else if (DOC_FIELD_NAME.equals(fieldName)) {
if (reverse) {
sortFields.add(SORT_DOC_REVERSE);
} else {
sortFields.add(SORT_DOC);
}
} else {
FieldMapper fieldMapper = context.mapperService().smartNameFieldMapper(fieldName);
if (fieldMapper == null) {
throw new SearchParseException(context, "No mapping found for [" + fieldName + "]");
}
sortFields.add(new SortField(fieldName, fieldMapper.fieldDataType().newFieldComparatorSource(context.fieldDataCache()), reverse));
}
}
}

34
modules/elasticsearch/src/main/java/org/elasticsearch/search/sort/SortParser.java Normal file
View File

@ -0,0 +1,34 @@
/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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.sort;
import org.apache.lucene.search.SortField;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.search.internal.SearchContext;
/**
* @author kimchy (shay.banon)
*/
public interface SortParser {
String[] names();
SortField parse(XContentParser parser, SearchContext context) throws Exception;
}