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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.sort;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.index.query.QueryBuilder;
import org.elasticsearch.script.Script;
import java.io.IOException;
/**
* Script sort builder allows to sort based on a custom script expression.
*/
public class ScriptSortBuilder extends SortBuilder {
private Script script;
private final String type;
private SortOrder order;
private String sortMode;
private QueryBuilder nestedFilter;
private String nestedPath;
/**
* Constructs a script sort builder with the given script.
*
* @param script
* The script to use.
*/
public ScriptSortBuilder(Script script, String type) {
this.script = script;
this.type = type;
}
/**
* Sets the sort order.
*/
@Override
public ScriptSortBuilder order(SortOrder order) {
this.order = order;
return this;
}
/**
* Not really relevant.
*/
@Override
public SortBuilder missing(Object missing) {
return this;
}
/**
* Defines which distance to use for sorting in the case a document contains multiple geo points.
* Possible values: min and max
*/
public ScriptSortBuilder sortMode(String sortMode) {
this.sortMode = sortMode;
return this;
}
/**
* Sets the nested filter that the nested objects should match with in order to be taken into account
* for sorting.
*/
public ScriptSortBuilder setNestedFilter(QueryBuilder nestedFilter) {
this.nestedFilter = nestedFilter;
return this;
}
/**
* Sets the nested path if sorting occurs on a field that is inside a nested object. For sorting by script this
* needs to be specified.
*/
public ScriptSortBuilder setNestedPath(String nestedPath) {
this.nestedPath = nestedPath;
return this;
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params builderParams) throws IOException {
builder.startObject("_script");
builder.field("script", script);
builder.field("type", type);
if (order == SortOrder.DESC) {
builder.field("reverse", true);
}
if (sortMode != null) {
builder.field("mode", sortMode);
}
if (nestedPath != null) {
builder.field("nested_path", nestedPath);
}
if (nestedFilter != null) {
builder.field("nested_filter", nestedFilter, builderParams);
}
builder.endObject();
return builder;
}
}
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