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ByteFieldMapper.java
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ByteFieldMapper.java
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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.core;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.TokenStream;
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.ElasticSearchIllegalArgumentException;
import org.elasticsearch.common.Explicit;
import org.elasticsearch.common.Nullable;
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.NumericIntegerAnalyzer;
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.query.QueryParseContext;
import org.elasticsearch.index.search.NumericRangeFieldDataFilter;
import org.elasticsearch.index.similarity.SimilarityProvider;
import java.io.IOException;
import java.util.Map;
import static org.elasticsearch.common.xcontent.support.XContentMapValues.nodeByteValue;
import static org.elasticsearch.index.mapper.MapperBuilders.byteField;
import static org.elasticsearch.index.mapper.core.TypeParsers.parseNumberField;
/**
*
*/
public class ByteFieldMapper extends NumberFieldMapper<Byte> {
public static final String CONTENT_TYPE = "byte";
public static class Defaults extends NumberFieldMapper.Defaults {
public static final FieldType FIELD_TYPE = new FieldType(NumberFieldMapper.Defaults.FIELD_TYPE);
static {
FIELD_TYPE.freeze();
}
public static final Byte NULL_VALUE = null;
}
public static class Builder extends NumberFieldMapper.Builder<Builder, ByteFieldMapper> {
protected Byte nullValue = Defaults.NULL_VALUE;
public Builder(String name) {
super(name, new FieldType(Defaults.FIELD_TYPE));
builder = this;
}
public Builder nullValue(byte nullValue) {
this.nullValue = nullValue;
return this;
}
@Override
public ByteFieldMapper build(BuilderContext context) {
fieldType.setOmitNorms(fieldType.omitNorms() && boost == 1.0f);
ByteFieldMapper fieldMapper = new ByteFieldMapper(buildNames(context),
precisionStep, boost, fieldType, nullValue, ignoreMalformed(context),
provider, similarity, normsLoading, fieldDataSettings);
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 {
ByteFieldMapper.Builder builder = byteField(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(nodeByteValue(propNode));
}
}
return builder;
}
}
private Byte nullValue;
private String nullValueAsString;
protected ByteFieldMapper(Names names, int precisionStep, float boost, FieldType fieldType,
Byte nullValue, Explicit<Boolean> ignoreMalformed, PostingsFormatProvider provider, SimilarityProvider similarity, Loading normsLoading, @Nullable Settings fieldDataSettings) {
super(names, precisionStep, boost, fieldType,
ignoreMalformed, new NamedAnalyzer("_byte/" + precisionStep, new NumericIntegerAnalyzer(precisionStep)),
new NamedAnalyzer("_byte/max", new NumericIntegerAnalyzer(Integer.MAX_VALUE)), provider, similarity, normsLoading, fieldDataSettings);
this.nullValue = nullValue;
this.nullValueAsString = nullValue == null ? null : nullValue.toString();
}
@Override
public FieldType defaultFieldType() {
return Defaults.FIELD_TYPE;
}
@Override
public FieldDataType defaultFieldDataType() {
return new FieldDataType("byte");
}
@Override
protected int maxPrecisionStep() {
return 32;
}
@Override
public Byte value(Object value) {
if (value == null) {
return null;
}
if (value instanceof Number) {
return ((Number) value).byteValue();
}
if (value instanceof BytesRef) {
return ((BytesRef) value).bytes[((BytesRef) value).offset];
}
return Byte.parseByte(value.toString());
}
@Override
public BytesRef indexedValueForSearch(Object value) {
BytesRef bytesRef = new BytesRef();
NumericUtils.intToPrefixCoded(parseValue(value), 0, bytesRef); // 0 because of exact match
return bytesRef;
}
private byte parseValue(Object value) {
if (value instanceof Number) {
return ((Number) value).byteValue();
}
if (value instanceof BytesRef) {
return Byte.parseByte(((BytesRef) value).utf8ToString());
}
return Byte.parseByte(value.toString());
}
private int parseValueAsInt(Object value) {
return parseValue(value);
}
@Override
public Query fuzzyQuery(String value, String minSim, int prefixLength, int maxExpansions, boolean transpositions) {
byte iValue = Byte.parseByte(value);
byte iSim;
try {
iSim = Byte.parseByte(minSim);
} catch (NumberFormatException e) {
iSim = (byte) Float.parseFloat(minSim);
}
return NumericRangeQuery.newIntRange(names.indexName(), precisionStep,
iValue - iSim,
iValue + iSim,
true, true);
}
@Override
public Query termQuery(Object value, @Nullable QueryParseContext context) {
int iValue = parseValue(value);
return NumericRangeQuery.newIntRange(names.indexName(), precisionStep,
iValue, iValue, true, true);
}
@Override
public Query rangeQuery(Object lowerTerm, Object upperTerm, boolean includeLower, boolean includeUpper, @Nullable QueryParseContext context) {
return NumericRangeQuery.newIntRange(names.indexName(), precisionStep,
lowerTerm == null ? null : parseValueAsInt(lowerTerm),
upperTerm == null ? null : parseValueAsInt(upperTerm),
includeLower, includeUpper);
}
@Override
public Filter termFilter(Object value, @Nullable QueryParseContext context) {
int iValue = parseValueAsInt(value);
return NumericRangeFilter.newIntRange(names.indexName(), precisionStep,
iValue, iValue, true, true);
}
@Override
public Filter rangeFilter(Object lowerTerm, Object upperTerm, boolean includeLower, boolean includeUpper, @Nullable QueryParseContext context) {
return NumericRangeFilter.newIntRange(names.indexName(), precisionStep,
lowerTerm == null ? null : parseValueAsInt(lowerTerm),
upperTerm == null ? null : parseValueAsInt(upperTerm),
includeLower, includeUpper);
}
@Override
public Filter rangeFilter(IndexFieldDataService fieldData, Object lowerTerm, Object upperTerm, boolean includeLower, boolean includeUpper, @Nullable QueryParseContext context) {
return NumericRangeFieldDataFilter.newByteRange((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.newIntRange(names.indexName(), precisionStep,
nullValue.intValue(),
nullValue.intValue(),
true, true);
}
@Override
protected boolean customBoost() {
return true;
}
@Override
protected Field innerParseCreateField(ParseContext context) throws IOException {
byte 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 = Byte.parseByte(sExternalValue);
}
} else {
value = ((Number) externalValue).byteValue();
}
if (context.includeInAll(includeInAll, this)) {
context.allEntries().addText(names.fullName(), Byte.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;
Byte 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 = (byte) parser.shortValue();
}
} else if ("boost".equals(currentFieldName) || "_boost".equals(currentFieldName)) {
boost = parser.floatValue();
} else {
throw new ElasticSearchIllegalArgumentException("unknown property [" + currentFieldName + "]");
}
}
}
if (objValue == null) {
// no value
return null;
}
value = objValue;
} else {
value = (byte) parser.shortValue();
if (context.includeInAll(includeInAll, this)) {
context.allEntries().addText(names.fullName(), parser.text(), boost);
}
}
}
CustomByteNumericField field = new CustomByteNumericField(this, value, fieldType);
field.setBoost(boost);
return field;
}
@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 = ((ByteFieldMapper) mergeWith).nullValue;
this.nullValueAsString = ((ByteFieldMapper) mergeWith).nullValueAsString;
}
}
@Override
protected void doXContentBody(XContentBuilder builder, boolean includeDefaults, Params params) throws IOException {
super.doXContentBody(builder, includeDefaults, params);
if (includeDefaults || precisionStep != Defaults.PRECISION_STEP) {
builder.field("precision_step", precisionStep);
}
if (includeDefaults || nullValue != null) {
builder.field("null_value", nullValue);
}
if (includeInAll != null) {
builder.field("include_in_all", includeInAll);
} else if (includeDefaults) {
builder.field("include_in_all", false);
}
}
public static class CustomByteNumericField extends CustomNumericField {
private final byte number;
private final NumberFieldMapper mapper;
public CustomByteNumericField(NumberFieldMapper mapper, byte number, FieldType fieldType) {
super(mapper, number, fieldType);
this.mapper = mapper;
this.number = number;
}
@Override
public TokenStream tokenStream(Analyzer analyzer) {
if (fieldType().indexed()) {
return mapper.popCachedStream().setIntValue(number);
}
return null;
}
@Override
public String numericAsString() {
return Byte.toString(number);
}
}
}