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org.elasticsearch.index.mapper.internal.BoostFieldMapper Maven / Gradle / Ivy
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/*
* 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.index.mapper.internal;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.FieldType;
import org.apache.lucene.search.Filter;
import org.apache.lucene.search.NumericRangeFilter;
import org.apache.lucene.search.NumericRangeQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.util.NumericUtils;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.Numbers;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.analysis.NamedAnalyzer;
import org.elasticsearch.index.analysis.NumericFloatAnalyzer;
import org.elasticsearch.index.codec.postingsformat.PostingsFormatProvider;
import org.elasticsearch.index.fielddata.FieldDataType;
import org.elasticsearch.index.fielddata.IndexFieldDataService;
import org.elasticsearch.index.fielddata.IndexNumericFieldData;
import org.elasticsearch.index.mapper.*;
import org.elasticsearch.index.mapper.core.FloatFieldMapper;
import org.elasticsearch.index.mapper.core.NumberFieldMapper;
import org.elasticsearch.index.query.QueryParseContext;
import org.elasticsearch.index.search.NumericRangeFieldDataFilter;
import java.io.IOException;
import java.util.Map;
import static org.elasticsearch.common.xcontent.support.XContentMapValues.nodeFloatValue;
import static org.elasticsearch.index.mapper.core.TypeParsers.parseNumberField;
/**
*
*/
public class BoostFieldMapper extends NumberFieldMapper implements InternalMapper, RootMapper {
public static final String CONTENT_TYPE = "_boost";
public static final String NAME = "_boost";
public static class Defaults extends NumberFieldMapper.Defaults {
public static final String NAME = "_boost";
public static final Float NULL_VALUE = null;
public static final FieldType FIELD_TYPE = new FieldType(NumberFieldMapper.Defaults.FIELD_TYPE);
static {
FIELD_TYPE.setIndexed(false);
FIELD_TYPE.setStored(false);
}
}
public static class Builder extends NumberFieldMapper.Builder {
protected Float nullValue = Defaults.NULL_VALUE;
public Builder(String name) {
super(name, new FieldType(Defaults.FIELD_TYPE));
builder = this;
}
public Builder nullValue(float nullValue) {
this.nullValue = nullValue;
return this;
}
@Override
public BoostFieldMapper build(BuilderContext context) {
return new BoostFieldMapper(name, buildIndexName(context),
precisionStep, boost, fieldType, nullValue, provider, fieldDataSettings);
}
}
public static class TypeParser implements Mapper.TypeParser {
@Override
public Mapper.Builder parse(String fieldName, Map node, ParserContext parserContext) throws MapperParsingException {
String name = node.get("name") == null ? BoostFieldMapper.Defaults.NAME : node.get("name").toString();
BoostFieldMapper.Builder builder = MapperBuilders.boost(name);
parseNumberField(builder, name, node, parserContext);
for (Map.Entry entry : node.entrySet()) {
String propName = Strings.toUnderscoreCase(entry.getKey());
Object propNode = entry.getValue();
if (propName.equals("null_value")) {
builder.nullValue(nodeFloatValue(propNode));
}
}
return builder;
}
}
private final Float nullValue;
public BoostFieldMapper() {
this(Defaults.NAME, Defaults.NAME);
}
protected BoostFieldMapper(String name, String indexName) {
this(name, indexName, Defaults.PRECISION_STEP, Defaults.BOOST, new FieldType(Defaults.FIELD_TYPE),
Defaults.NULL_VALUE, null, null);
}
protected BoostFieldMapper(String name, String indexName, int precisionStep, float boost, FieldType fieldType,
Float nullValue, PostingsFormatProvider provider, @Nullable Settings fieldDataSettings) {
super(new Names(name, indexName, indexName, name), precisionStep, boost, fieldType,
Defaults.IGNORE_MALFORMED, new NamedAnalyzer("_float/" + precisionStep, new NumericFloatAnalyzer(precisionStep)),
new NamedAnalyzer("_float/max", new NumericFloatAnalyzer(Integer.MAX_VALUE)), provider, null, fieldDataSettings);
this.nullValue = nullValue;
}
@Override
public FieldType defaultFieldType() {
return Defaults.FIELD_TYPE;
}
@Override
public FieldDataType defaultFieldDataType() {
return new FieldDataType("float");
}
@Override
protected int maxPrecisionStep() {
return 32;
}
@Override
public Float value(Object value) {
if (value == null) {
return null;
}
if (value instanceof Number) {
return ((Number) value).floatValue();
}
if (value instanceof BytesRef) {
return Numbers.bytesToFloat((BytesRef) value);
}
return Float.parseFloat(value.toString());
}
@Override
public BytesRef indexedValueForSearch(Object value) {
int intValue = NumericUtils.floatToSortableInt(parseValue(value));
BytesRef bytesRef = new BytesRef();
NumericUtils.intToPrefixCoded(intValue, precisionStep(), bytesRef);
return bytesRef;
}
private float parseValue(Object value) {
if (value instanceof Number) {
return ((Number) value).floatValue();
}
if (value instanceof BytesRef) {
return Float.parseFloat(((BytesRef) value).utf8ToString());
}
return Float.parseFloat(value.toString());
}
@Override
public Query fuzzyQuery(String value, String minSim, int prefixLength, int maxExpansions, boolean transpositions) {
float iValue = Float.parseFloat(value);
float iSim = Float.parseFloat(minSim);
return NumericRangeQuery.newFloatRange(names.indexName(), precisionStep,
iValue - iSim,
iValue + iSim,
true, true);
}
@Override
public Query rangeQuery(Object lowerTerm, Object upperTerm, boolean includeLower, boolean includeUpper, @Nullable QueryParseContext context) {
return NumericRangeQuery.newFloatRange(names.indexName(), precisionStep,
lowerTerm == null ? null : parseValue(lowerTerm),
upperTerm == null ? null : parseValue(upperTerm),
includeLower, includeUpper);
}
@Override
public Filter rangeFilter(Object lowerTerm, Object upperTerm, boolean includeLower, boolean includeUpper, @Nullable QueryParseContext context) {
return NumericRangeFilter.newFloatRange(names.indexName(), precisionStep,
lowerTerm == null ? null : parseValue(lowerTerm),
upperTerm == null ? null : parseValue(upperTerm),
includeLower, includeUpper);
}
@Override
public Filter rangeFilter(IndexFieldDataService fieldData, Object lowerTerm, Object upperTerm, boolean includeLower, boolean includeUpper, @Nullable QueryParseContext context) {
return NumericRangeFieldDataFilter.newFloatRange((IndexNumericFieldData) fieldData.getForField(this),
lowerTerm == null ? null : parseValue(lowerTerm),
upperTerm == null ? null : parseValue(upperTerm),
includeLower, includeUpper);
}
@Override
public Filter nullValueFilter() {
if (nullValue == null) {
return null;
}
return NumericRangeFilter.newFloatRange(names.indexName(), precisionStep,
nullValue,
nullValue,
true, true);
}
@Override
public void preParse(ParseContext context) throws IOException {
}
@Override
public void postParse(ParseContext context) throws IOException {
}
@Override
public void validate(ParseContext context) throws MapperParsingException {
}
@Override
public boolean includeInObject() {
return true;
}
@Override
public void parse(ParseContext context) throws IOException {
// we override parse since we want to handle cases where it is not indexed and not stored (the default)
float value = parseFloatValue(context);
if (!Float.isNaN(value)) {
context.docBoost(value);
}
super.parse(context);
}
@Override
protected Field innerParseCreateField(ParseContext context) throws IOException {
final float value = parseFloatValue(context);
if (Float.isNaN(value)) {
return null;
}
context.docBoost(value);
return new FloatFieldMapper.CustomFloatNumericField(this, value, fieldType);
}
private float parseFloatValue(ParseContext context) throws IOException {
float value;
if (context.parser().currentToken() == XContentParser.Token.VALUE_NULL) {
if (nullValue == null) {
return Float.NaN;
}
value = nullValue;
} else {
value = context.parser().floatValue();
}
return value;
}
@Override
protected String contentType() {
return CONTENT_TYPE;
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
// all are defaults, don't write it at all
if (name().equals(Defaults.NAME) && nullValue == null) {
return builder;
}
builder.startObject(contentType());
if (!name().equals(Defaults.NAME)) {
builder.field("name", name());
}
if (nullValue != null) {
builder.field("null_value", nullValue);
}
builder.endObject();
return builder;
}
@Override
public void merge(Mapper mergeWith, MergeContext mergeContext) throws MergeMappingException {
// do nothing here, no merging, but also no exception
}
}
