/*
* Licensed to ElasticSearch and Shay Banon 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.facet.termsstats;
import com.google.common.collect.Maps;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.search.builder.SearchSourceBuilderException;
import org.elasticsearch.search.facet.AbstractFacetBuilder;
import java.io.IOException;
import java.util.Map;
/**
*
*/
public class TermsStatsFacetBuilder extends AbstractFacetBuilder {
private String keyField;
private String valueField;
private int size = -1;
private TermsStatsFacet.ComparatorType comparatorType;
private String script;
private String lang;
private Map<String, Object> params;
/**
* Constructs a new terms stats facet builder under the provided facet name.
*/
public TermsStatsFacetBuilder(String name) {
super(name);
}
public TermsStatsFacetBuilder keyField(String keyField) {
this.keyField = keyField;
return this;
}
public TermsStatsFacetBuilder valueField(String valueField) {
this.valueField = valueField;
return this;
}
/**
* The order by which to return the facets by. Defaults to {@link TermsStatsFacet.ComparatorType#COUNT}.
*/
public TermsStatsFacetBuilder order(TermsStatsFacet.ComparatorType comparatorType) {
this.comparatorType = comparatorType;
return this;
}
/**
* Sets the size of the result.
*/
public TermsStatsFacetBuilder size(int size) {
this.size = size;
return this;
}
/**
* Marks all terms to be returned, even ones with 0 counts.
*/
public TermsStatsFacetBuilder allTerms() {
this.size = 0;
return this;
}
/**
* A value script to be executed (instead of value field) which results (numeric) will be used
* to compute the totals.
*/
public TermsStatsFacetBuilder valueScript(String script) {
this.script = script;
return this;
}
/**
* The language of the script.
*/
public TermsStatsFacetBuilder lang(String lang) {
this.lang = lang;
return this;
}
/**
* A parameter that will be passed to the script.
*
* @param name The name of the script parameter.
* @param value The value of the script parameter.
*/
public TermsStatsFacetBuilder param(String name, Object value) {
if (params == null) {
params = Maps.newHashMap();
}
params.put(name, value);
return this;
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
if (keyField == null) {
throw new SearchSourceBuilderException("key field must be set on terms facet for facet [" + name + "]");
}
if (valueField == null && script == null) {
throw new SearchSourceBuilderException("value field or value script must be set on terms facet for facet [" + name + "]");
}
builder.startObject(name);
builder.startObject(TermsStatsFacet.TYPE);
builder.field("key_field", keyField);
if (valueField != null) {
builder.field("value_field", valueField);
}
if (script != null) {
builder.field("value_script", script);
if (lang != null) {
builder.field("lang", lang);
}
if (this.params != null) {
builder.field("params", this.params);
}
}
if (comparatorType != null) {
builder.field("order", comparatorType.name().toLowerCase());
}
if (size != -1) {
builder.field("size", size);
}
builder.endObject();
addFilterFacetAndGlobal(builder, params);
builder.endObject();
return builder;
}
}