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This OSGi bundle wraps ${pkgArtifactId} ${pkgVersion} jar file.
/*
* 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.facet.statistical;
import com.google.common.collect.Lists;
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.fielddata.IndexNumericFieldData;
import org.elasticsearch.index.mapper.FieldMapper;
import org.elasticsearch.index.mapper.core.NumberFieldMapper;
import org.elasticsearch.script.ScriptService;
import org.elasticsearch.search.facet.FacetExecutor;
import org.elasticsearch.search.facet.FacetParser;
import org.elasticsearch.search.facet.FacetPhaseExecutionException;
import org.elasticsearch.search.internal.SearchContext;
import java.io.IOException;
import java.util.List;
import java.util.Map;
/**
*
*/
public class StatisticalFacetParser extends AbstractComponent implements FacetParser {
@Inject
public StatisticalFacetParser(Settings settings) {
super(settings);
InternalStatisticalFacet.registerStreams();
}
@Override
public String[] types() {
return new String[]{StatisticalFacet.TYPE};
}
@Override
public FacetExecutor.Mode defaultMainMode() {
return FacetExecutor.Mode.COLLECTOR;
}
@Override
public FacetExecutor.Mode defaultGlobalMode() {
return FacetExecutor.Mode.COLLECTOR;
}
@Override
public FacetExecutor parse(String facetName, XContentParser parser, SearchContext context) throws IOException {
String field = null;
String[] fieldsNames = null;
String script = null;
String scriptLang = null;
ScriptService.ScriptType scriptType = null;
Map 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 == XContentParser.Token.START_ARRAY) {
if ("fields".equals(currentFieldName)) {
List fields = Lists.newArrayListWithCapacity(4);
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
fields.add(parser.text());
}
fieldsNames = fields.toArray(new String[fields.size()]);
}
} else if (token.isValue()) {
if ("field".equals(currentFieldName)) {
field = parser.text();
} else if ("script".equals(currentFieldName)) {
script = parser.text();
scriptType = ScriptService.ScriptType.INLINE;
} else if ("script_id".equals(currentFieldName)) {
script = parser.text();
scriptType = ScriptService.ScriptType.INDEXED;
} else if ("file".equals(currentFieldName)) {
script = parser.text();
scriptType = ScriptService.ScriptType.FILE;
} else if ("lang".equals(currentFieldName)) {
scriptLang = parser.text();
}
}
}
if (fieldsNames != null) {
IndexNumericFieldData[] indexFieldDatas = new IndexNumericFieldData[fieldsNames.length];
for (int i = 0; i < fieldsNames.length; i++) {
FieldMapper fieldMapper = context.smartNameFieldMapper(fieldsNames[i]);
if (fieldMapper == null) {
throw new FacetPhaseExecutionException(facetName, "No mapping found for field [" + fieldsNames[i] + "]");
}
if (!(fieldMapper instanceof NumberFieldMapper)) {
throw new FacetPhaseExecutionException(facetName, "field [" + field + "] isn't a number field, but a " + fieldMapper.fieldDataType().getType());
}
indexFieldDatas[i] = context.fieldData().getForField(fieldMapper);
}
return new StatisticalFieldsFacetExecutor(indexFieldDatas, context);
}
if (script == null && field == null) {
throw new FacetPhaseExecutionException(facetName, "statistical facet requires either [script] or [field] to be set");
}
if (field != null) {
FieldMapper fieldMapper = context.smartNameFieldMapper(field);
if (fieldMapper == null) {
throw new FacetPhaseExecutionException(facetName, "No mapping found for field [" + field + "]");
}
if (!(fieldMapper instanceof NumberFieldMapper)) {
throw new FacetPhaseExecutionException(facetName, "field [" + field + "] isn't a number field, but a " + fieldMapper.fieldDataType().getType());
}
IndexNumericFieldData indexFieldData = context.fieldData().getForField(fieldMapper);
return new StatisticalFacetExecutor(indexFieldData, context);
} else {
return new ScriptStatisticalFacetExecutor(scriptLang, script, scriptType, params, context);
}
}
}