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FloatFieldMapper.java
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FloatFieldMapper.java
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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.core;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.Fieldable;
import org.apache.lucene.index.FieldInfo.IndexOptions;
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.NumericUtils;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.Numbers;
import org.elasticsearch.common.Strings;
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.cache.field.data.FieldDataCache;
import org.elasticsearch.index.field.data.FieldDataType;
import org.elasticsearch.index.mapper.*;
import org.elasticsearch.index.mapper.core.BooleanFieldMapper.Defaults;
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.MapperBuilders.floatField;
import static org.elasticsearch.index.mapper.core.TypeParsers.parseNumberField;
/**
*
*/
public class FloatFieldMapper extends NumberFieldMapper<Float> {
public static final String CONTENT_TYPE = "float";
public static class Defaults extends NumberFieldMapper.Defaults {
public static final Float NULL_VALUE = null;
}
public static class Builder extends NumberFieldMapper.Builder<Builder, FloatFieldMapper> {
protected Float nullValue = Defaults.NULL_VALUE;
public Builder(String name) {
super(name);
builder = this;
}
public Builder nullValue(float nullValue) {
this.nullValue = nullValue;
return this;
}
@Override
public FloatFieldMapper build(BuilderContext context) {
FloatFieldMapper fieldMapper = new FloatFieldMapper(buildNames(context),
precisionStep, fuzzyFactor, index, store, boost, omitNorms, indexOptions, nullValue,
ignoreMalformed(context));
fieldMapper.includeInAll(includeInAll);
return fieldMapper;
}
}
public static class TypeParser implements Mapper.TypeParser {
@Override
public Mapper.Builder parse(String name, Map<String, Object> node, ParserContext parserContext) throws MapperParsingException {
FloatFieldMapper.Builder builder = floatField(name);
parseNumberField(builder, name, node, parserContext);
for (Map.Entry<String, Object> 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 Float nullValue;
private String nullValueAsString;
protected FloatFieldMapper(Names names, int precisionStep, String fuzzyFactor, Field.Index index, Field.Store store,
float boost, boolean omitNorms, IndexOptions indexOptions,
Float nullValue, boolean ignoreMalformed) {
super(names, precisionStep, fuzzyFactor, index, store, boost, omitNorms, indexOptions,
ignoreMalformed, new NamedAnalyzer("_float/" + precisionStep, new NumericFloatAnalyzer(precisionStep)),
new NamedAnalyzer("_float/max", new NumericFloatAnalyzer(Integer.MAX_VALUE)));
this.nullValue = nullValue;
this.nullValueAsString = nullValue == null ? null : nullValue.toString();
}
@Override
protected int maxPrecisionStep() {
return 32;
}
@Override
public Float value(Fieldable field) {
byte[] value = field.getBinaryValue();
if (value == null) {
return null;
}
return Numbers.bytesToFloat(value);
}
@Override
public Float valueFromString(String value) {
return Float.parseFloat(value);
}
@Override
public String indexedValue(String value) {
return NumericUtils.floatToPrefixCoded(Float.parseFloat(value));
}
@Override
public Query fuzzyQuery(String value, String minSim, int prefixLength, int maxExpansions) {
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 fuzzyQuery(String value, double minSim, int prefixLength, int maxExpansions) {
float iValue = Float.parseFloat(value);
float iSim = (float) (minSim * dFuzzyFactor);
return NumericRangeQuery.newFloatRange(names.indexName(), precisionStep,
iValue - iSim,
iValue + iSim,
true, true);
}
@Override
public Query fieldQuery(String value, @Nullable QueryParseContext context) {
float fValue = Float.parseFloat(value);
return NumericRangeQuery.newFloatRange(names.indexName(), precisionStep,
fValue, fValue, true, true);
}
@Override
public Query rangeQuery(String lowerTerm, String upperTerm, boolean includeLower, boolean includeUpper, @Nullable QueryParseContext context) {
return NumericRangeQuery.newFloatRange(names.indexName(), precisionStep,
lowerTerm == null ? null : Float.parseFloat(lowerTerm),
upperTerm == null ? null : Float.parseFloat(upperTerm),
includeLower, includeUpper);
}
@Override
public Filter fieldFilter(String value, @Nullable QueryParseContext context) {
float fValue = Float.parseFloat(value);
return NumericRangeFilter.newFloatRange(names.indexName(), precisionStep,
fValue, fValue, true, true);
}
@Override
public Filter rangeFilter(String lowerTerm, String upperTerm, boolean includeLower, boolean includeUpper, @Nullable QueryParseContext context) {
return NumericRangeFilter.newFloatRange(names.indexName(), precisionStep,
lowerTerm == null ? null : Float.parseFloat(lowerTerm),
upperTerm == null ? null : Float.parseFloat(upperTerm),
includeLower, includeUpper);
}
@Override
public Filter rangeFilter(FieldDataCache fieldDataCache, String lowerTerm, String upperTerm, boolean includeLower, boolean includeUpper, @Nullable QueryParseContext context) {
return NumericRangeFieldDataFilter.newFloatRange(fieldDataCache, names.indexName(),
lowerTerm == null ? null : Float.parseFloat(lowerTerm),
upperTerm == null ? null : Float.parseFloat(upperTerm),
includeLower, includeUpper);
}
@Override
public Filter nullValueFilter() {
if (nullValue == null) {
return null;
}
return NumericRangeFilter.newFloatRange(names.indexName(), precisionStep,
nullValue,
nullValue,
true, true);
}
@Override
protected boolean customBoost() {
return true;
}
@Override
protected Fieldable innerParseCreateField(ParseContext context) throws IOException {
float value;
float boost = this.boost;
if (context.externalValueSet()) {
Object externalValue = context.externalValue();
if (externalValue == null) {
if (nullValue == null) {
return null;
}
value = nullValue;
} else if (externalValue instanceof String) {
String sExternalValue = (String) externalValue;
if (sExternalValue.length() == 0) {
if (nullValue == null) {
return null;
}
value = nullValue;
} else {
value = Float.parseFloat(sExternalValue);
}
} else {
value = ((Number) externalValue).floatValue();
}
if (context.includeInAll(includeInAll, this)) {
context.allEntries().addText(names.fullName(), Float.toString(value), boost);
}
} else {
XContentParser parser = context.parser();
if (parser.currentToken() == XContentParser.Token.VALUE_NULL ||
(parser.currentToken() == XContentParser.Token.VALUE_STRING && parser.textLength() == 0)) {
if (nullValue == null) {
return null;
}
value = nullValue;
if (nullValueAsString != null && (context.includeInAll(includeInAll, this))) {
context.allEntries().addText(names.fullName(), nullValueAsString, boost);
}
} else if (parser.currentToken() == XContentParser.Token.START_OBJECT) {
XContentParser.Token token;
String currentFieldName = null;
Float objValue = nullValue;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else {
if ("value".equals(currentFieldName) || "_value".equals(currentFieldName)) {
if (parser.currentToken() != XContentParser.Token.VALUE_NULL) {
objValue = parser.floatValue();
}
} else if ("boost".equals(currentFieldName) || "_boost".equals(currentFieldName)) {
boost = parser.floatValue();
}
}
}
if (objValue == null) {
// no value
return null;
}
value = objValue;
} else {
value = parser.floatValue();
if (context.includeInAll(includeInAll, this)) {
context.allEntries().addText(names.fullName(), parser.text(), boost);
}
}
}
CustomFloatNumericField field = new CustomFloatNumericField(this, value);
field.setBoost(boost);
return field;
}
@Override
public FieldDataType fieldDataType() {
return FieldDataType.DefaultTypes.FLOAT;
}
@Override
protected String contentType() {
return CONTENT_TYPE;
}
@Override
public void merge(Mapper mergeWith, MergeContext mergeContext) throws MergeMappingException {
super.merge(mergeWith, mergeContext);
if (!this.getClass().equals(mergeWith.getClass())) {
return;
}
if (!mergeContext.mergeFlags().simulate()) {
this.nullValue = ((FloatFieldMapper) mergeWith).nullValue;
this.nullValueAsString = ((FloatFieldMapper) mergeWith).nullValueAsString;
}
}
@Override
protected void doXContentBody(XContentBuilder builder) throws IOException {
super.doXContentBody(builder);
if (index != Defaults.INDEX) {
builder.field("index", index.name().toLowerCase());
}
if (store != Defaults.STORE) {
builder.field("store", store.name().toLowerCase());
}
if (termVector != Defaults.TERM_VECTOR) {
builder.field("term_vector", termVector.name().toLowerCase());
}
if (omitNorms != Defaults.OMIT_NORMS) {
builder.field("omit_norms", omitNorms);
}
if (indexOptions != Defaults.INDEX_OPTIONS) {
builder.field("index_options", indexOptionToString(indexOptions));
}
if (precisionStep != Defaults.PRECISION_STEP) {
builder.field("precision_step", precisionStep);
}
if (fuzzyFactor != Defaults.FUZZY_FACTOR) {
builder.field("fuzzy_factor", fuzzyFactor);
}
if (nullValue != null) {
builder.field("null_value", nullValue);
}
if (includeInAll != null) {
builder.field("include_in_all", includeInAll);
}
}
public static class CustomFloatNumericField extends CustomNumericField {
private final float number;
private final NumberFieldMapper mapper;
public CustomFloatNumericField(NumberFieldMapper mapper, float number) {
super(mapper, mapper.stored() ? Numbers.floatToBytes(number) : null);
this.mapper = mapper;
this.number = number;
}
@Override
public TokenStream tokenStreamValue() {
if (isIndexed) {
return mapper.popCachedStream().setFloatValue(number);
}
return null;
}
@Override
public String numericAsString() {
return Float.toString(number);
}
}
}