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/*
* 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.index.mapper.xcontent;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.Fieldable;
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.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.field.data.FieldDataType;
import org.elasticsearch.index.mapper.MapperParsingException;
import org.elasticsearch.index.mapper.MergeMappingException;
import java.io.IOException;
import java.util.Map;
import static org.elasticsearch.common.xcontent.support.XContentMapValues.*;
import static org.elasticsearch.index.mapper.xcontent.XContentMapperBuilders.*;
import static org.elasticsearch.index.mapper.xcontent.XContentTypeParsers.*;
/**
* @author kimchy (shay.banon)
*/
public class FloatFieldMapper extends NumberFieldMapper {
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 {
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, index, store, boost, omitNorms, omitTermFreqAndPositions, nullValue);
fieldMapper.includeInAll(includeInAll);
return fieldMapper;
}
}
public static class TypeParser implements XContentMapper.TypeParser {
@Override public XContentMapper.Builder parse(String name, Map node, ParserContext parserContext) throws MapperParsingException {
FloatFieldMapper.Builder builder = floatField(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 Float nullValue;
private String nullValueAsString;
protected FloatFieldMapper(Names names, int precisionStep, Field.Index index, Field.Store store,
float boost, boolean omitNorms, boolean omitTermFreqAndPositions,
Float nullValue) {
super(names, precisionStep, index, store, boost, omitNorms, omitTermFreqAndPositions,
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 rangeQuery(String lowerTerm, String upperTerm, boolean includeLower, boolean includeUpper) {
return NumericRangeQuery.newFloatRange(names.indexName(), precisionStep,
lowerTerm == null ? null : Float.parseFloat(lowerTerm),
upperTerm == null ? null : Float.parseFloat(upperTerm),
includeLower, includeUpper);
}
@Override public Filter rangeFilter(String lowerTerm, String upperTerm, boolean includeLower, boolean includeUpper) {
return NumericRangeFilter.newFloatRange(names.indexName(), precisionStep,
lowerTerm == null ? null : Float.parseFloat(lowerTerm),
upperTerm == null ? null : Float.parseFloat(upperTerm),
includeLower, includeUpper);
}
@Override protected Field parseCreateField(ParseContext context) throws IOException {
float value;
if (context.externalValueSet()) {
Object externalValue = context.externalValue();
if (externalValue == null) {
if (nullValue == null) {
return null;
}
value = nullValue;
} else {
value = ((Number) externalValue).floatValue();
}
if (includeInAll == null || includeInAll) {
context.allEntries().addText(names.fullName(), Float.toString(value), boost);
}
} else {
if (context.parser().currentToken() == XContentParser.Token.VALUE_NULL) {
if (nullValue == null) {
return null;
}
value = nullValue;
if (nullValueAsString != null && (includeInAll == null || includeInAll)) {
context.allEntries().addText(names.fullName(), nullValueAsString, boost);
}
} else {
value = context.parser().floatValue();
if (includeInAll == null || includeInAll) {
context.allEntries().addText(names.fullName(), context.parser().text(), boost);
}
}
}
Field field = null;
if (stored()) {
field = new Field(names.indexName(), Numbers.floatToBytes(value), store);
if (indexed()) {
field.setTokenStream(popCachedStream(precisionStep).setFloatValue(value));
}
} else if (indexed()) {
field = new Field(names.indexName(), popCachedStream(precisionStep).setFloatValue(value));
}
return field;
}
@Override public FieldDataType fieldDataType() {
return FieldDataType.DefaultTypes.FLOAT;
}
@Override protected String contentType() {
return CONTENT_TYPE;
}
@Override public void merge(XContentMapper 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 (omitTermFreqAndPositions != Defaults.OMIT_TERM_FREQ_AND_POSITIONS) {
builder.field("omit_term_freq_and_positions", omitTermFreqAndPositions);
}
if (precisionStep != Defaults.PRECISION_STEP) {
builder.field("precision_step", precisionStep);
}
if (nullValue != null) {
builder.field("null_value", nullValue);
}
if (includeInAll != null) {
builder.field("include_in_all", includeInAll);
}
}
}