/*
* 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.facet.termsstats;
import org.elasticsearch.common.component.AbstractComponent;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.field.data.FieldDataType;
import org.elasticsearch.index.mapper.FieldMapper;
import org.elasticsearch.search.facet.Facet;
import org.elasticsearch.search.facet.FacetCollector;
import org.elasticsearch.search.facet.FacetPhaseExecutionException;
import org.elasticsearch.search.facet.FacetProcessor;
import org.elasticsearch.search.facet.termsstats.doubles.TermsStatsDoubleFacetCollector;
import org.elasticsearch.search.facet.termsstats.longs.TermsStatsLongFacetCollector;
import org.elasticsearch.search.facet.termsstats.strings.TermsStatsStringFacetCollector;
import org.elasticsearch.search.internal.SearchContext;
import java.io.IOException;
import java.util.List;
import java.util.Map;
public class TermsStatsFacetProcessor extends AbstractComponent implements FacetProcessor {
@Inject public TermsStatsFacetProcessor(Settings settings) {
super(settings);
InternalTermsStatsFacet.registerStreams();
}
@Override public String[] types() {
return new String[]{TermsStatsFacet.TYPE, "termsStats"};
}
@Override public FacetCollector parse(String facetName, XContentParser parser, SearchContext context) throws IOException {
String keyField = null;
String valueField = null;
int size = 10;
TermsStatsFacet.ComparatorType comparatorType = TermsStatsFacet.ComparatorType.COUNT;
String scriptLang = null;
String script = null;
Map<String, Object> params = null;
String currentFieldName = null;
XContentParser.Token token;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token == XContentParser.Token.START_OBJECT) {
if ("params".equals(currentFieldName)) {
params = parser.map();
}
} else if (token.isValue()) {
if ("key_field".equals(currentFieldName) || "keyField".equals(currentFieldName)) {
keyField = parser.text();
} else if ("value_field".equals(currentFieldName) || "valueField".equals(currentFieldName)) {
valueField = parser.text();
} else if ("script_field".equals(currentFieldName)) {
script = parser.text();
} else if ("value_script".equals(currentFieldName)) {
script = parser.text();
} else if ("size".equals(currentFieldName)) {
size = parser.intValue();
} else if ("all_terms".equals(currentFieldName) || "allTerms".equals(currentFieldName)) {
if (parser.booleanValue()) {
size = 0; // indicates all terms
}
} else if ("order".equals(currentFieldName) || "comparator".equals(currentFieldName)) {
comparatorType = TermsStatsFacet.ComparatorType.fromString(parser.text());
} else if ("value_script".equals(currentFieldName)) {
script = parser.text();
} else if ("lang".equals(currentFieldName)) {
scriptLang = parser.text();
}
}
}
if (keyField == null) {
throw new FacetPhaseExecutionException(facetName, "[key_field] is required to be set for terms stats facet");
}
if (valueField == null && script == null) {
throw new FacetPhaseExecutionException(facetName, "either [value_field] or [script] are required to be set for terms stats facet");
}
FieldMapper keyFieldMapper = context.mapperService().smartNameFieldMapper(keyField);
if (keyFieldMapper != null) {
if (keyFieldMapper.fieldDataType() == FieldDataType.DefaultTypes.LONG) {
return new TermsStatsLongFacetCollector(facetName, keyField, valueField, size, comparatorType, context, scriptLang, script, params);
} else if (keyFieldMapper.fieldDataType() == FieldDataType.DefaultTypes.INT) {
return new TermsStatsLongFacetCollector(facetName, keyField, valueField, size, comparatorType, context, scriptLang, script, params);
} else if (keyFieldMapper.fieldDataType() == FieldDataType.DefaultTypes.SHORT) {
return new TermsStatsLongFacetCollector(facetName, keyField, valueField, size, comparatorType, context, scriptLang, script, params);
} else if (keyFieldMapper.fieldDataType() == FieldDataType.DefaultTypes.BYTE) {
return new TermsStatsLongFacetCollector(facetName, keyField, valueField, size, comparatorType, context, scriptLang, script, params);
} else if (keyFieldMapper.fieldDataType() == FieldDataType.DefaultTypes.DOUBLE) {
return new TermsStatsDoubleFacetCollector(facetName, keyField, valueField, size, comparatorType, context, scriptLang, script, params);
} else if (keyFieldMapper.fieldDataType() == FieldDataType.DefaultTypes.FLOAT) {
return new TermsStatsDoubleFacetCollector(facetName, keyField, valueField, size, comparatorType, context, scriptLang, script, params);
}
}
return new TermsStatsStringFacetCollector(facetName, keyField, valueField, size, comparatorType, context, scriptLang, script, params);
}
@Override public Facet reduce(String name, List<Facet> facets) {
InternalTermsStatsFacet first = (InternalTermsStatsFacet) facets.get(0);
return first.reduce(name, facets);
}
}