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/*
* 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.index.mapper.core;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.FieldType;
import org.apache.lucene.index.FieldInfo.IndexOptions;
import org.apache.lucene.queries.TermFilter;
import org.apache.lucene.search.Filter;
import org.apache.lucene.util.BytesRef;
import org.elasticsearch.ElasticsearchIllegalArgumentException;
import org.elasticsearch.common.Booleans;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.lucene.Lucene;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.codec.docvaluesformat.DocValuesFormatProvider;
import org.elasticsearch.index.codec.postingsformat.PostingsFormatProvider;
import org.elasticsearch.index.fielddata.FieldDataType;
import org.elasticsearch.index.mapper.*;
import org.elasticsearch.index.similarity.SimilarityProvider;
import java.io.IOException;
import java.util.List;
import java.util.Map;
import static org.elasticsearch.common.xcontent.support.XContentMapValues.nodeBooleanValue;
import static org.elasticsearch.index.mapper.MapperBuilders.booleanField;
import static org.elasticsearch.index.mapper.core.TypeParsers.parseField;
/**
*
*/
// TODO this can be made better, maybe storing a byte for it?
public class BooleanFieldMapper extends AbstractFieldMapper {
public static final String CONTENT_TYPE = "boolean";
public static class Defaults extends AbstractFieldMapper.Defaults {
public static final FieldType FIELD_TYPE = new FieldType(AbstractFieldMapper.Defaults.FIELD_TYPE);
static {
FIELD_TYPE.setOmitNorms(true);
FIELD_TYPE.setIndexOptions(IndexOptions.DOCS_ONLY);
FIELD_TYPE.setTokenized(false);
FIELD_TYPE.freeze();
}
public static final Boolean NULL_VALUE = null;
}
public static class Values {
public final static BytesRef TRUE = new BytesRef("T");
public final static BytesRef FALSE = new BytesRef("F");
}
public static class Builder extends AbstractFieldMapper.Builder {
private Boolean nullValue = Defaults.NULL_VALUE;
public Builder(String name) {
super(name, new FieldType(Defaults.FIELD_TYPE));
this.builder = this;
}
public Builder nullValue(boolean nullValue) {
this.nullValue = nullValue;
return this;
}
@Override
public Builder tokenized(boolean tokenized) {
if (tokenized) {
throw new ElasticsearchIllegalArgumentException("bool field can't be tokenized");
}
return super.tokenized(tokenized);
}
@Override
public BooleanFieldMapper build(BuilderContext context) {
return new BooleanFieldMapper(buildNames(context), boost, fieldType, nullValue, postingsProvider,
docValuesProvider, similarity, normsLoading, fieldDataSettings, context.indexSettings(), multiFieldsBuilder.build(this, context), copyTo);
}
}
public static class TypeParser implements Mapper.TypeParser {
@Override
public Mapper.Builder parse(String name, Map node, ParserContext parserContext) throws MapperParsingException {
BooleanFieldMapper.Builder builder = booleanField(name);
parseField(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")) {
if (propNode == null) {
throw new MapperParsingException("Property [null_value] cannot be null.");
}
builder.nullValue(nodeBooleanValue(propNode));
}
}
return builder;
}
}
private Boolean nullValue;
protected BooleanFieldMapper(Names names, float boost, FieldType fieldType, Boolean nullValue, PostingsFormatProvider postingsProvider,
DocValuesFormatProvider docValuesProvider, SimilarityProvider similarity, Loading normsLoading,
@Nullable Settings fieldDataSettings, Settings indexSettings, MultiFields multiFields, CopyTo copyTo) {
super(names, boost, fieldType, null, Lucene.KEYWORD_ANALYZER, Lucene.KEYWORD_ANALYZER, postingsProvider, docValuesProvider, similarity, normsLoading, fieldDataSettings, indexSettings, multiFields, copyTo);
this.nullValue = nullValue;
}
@Override
public FieldType defaultFieldType() {
return Defaults.FIELD_TYPE;
}
@Override
public FieldDataType defaultFieldDataType() {
// TODO have a special boolean type?
return new FieldDataType("string");
}
@Override
public boolean useTermQueryWithQueryString() {
return true;
}
@Override
public Boolean value(Object value) {
if (value == null) {
return Boolean.FALSE;
}
String sValue = value.toString();
if (sValue.length() == 0) {
return Boolean.FALSE;
}
if (sValue.length() == 1 && sValue.charAt(0) == 'F') {
return Boolean.FALSE;
}
if (Booleans.parseBoolean(sValue, false)) {
return Boolean.TRUE;
}
return Boolean.FALSE;
}
@Override
public Object valueForSearch(Object value) {
return value(value);
}
@Override
public BytesRef indexedValueForSearch(Object value) {
if (value == null) {
return Values.FALSE;
}
if (value instanceof Boolean) {
return ((Boolean) value) ? Values.TRUE : Values.FALSE;
}
String sValue;
if (value instanceof BytesRef) {
sValue = ((BytesRef) value).utf8ToString();
} else {
sValue = value.toString();
}
if (sValue.length() == 0) {
return Values.FALSE;
}
if (sValue.length() == 1 && sValue.charAt(0) == 'F') {
return Values.FALSE;
}
if (Booleans.parseBoolean(sValue, false)) {
return Values.TRUE;
}
return Values.FALSE;
}
@Override
public Filter nullValueFilter() {
if (nullValue == null) {
return null;
}
return new TermFilter(names().createIndexNameTerm(nullValue ? Values.TRUE : Values.FALSE));
}
@Override
protected void parseCreateField(ParseContext context, List fields) throws IOException {
if (!fieldType().indexed() && !fieldType().stored()) {
return;
}
Boolean value = context.parseExternalValue(Boolean.class);
if (value == null) {
XContentParser.Token token = context.parser().currentToken();
if (token == XContentParser.Token.VALUE_NULL) {
if (nullValue != null) {
value = nullValue;
}
} else {
value = context.parser().booleanValue();
}
}
if (value == null) {
return;
}
fields.add(new Field(names.indexName(), value ? "T" : "F", fieldType));
}
@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 = ((BooleanFieldMapper) mergeWith).nullValue;
}
}
@Override
protected String contentType() {
return CONTENT_TYPE;
}
@Override
protected void doXContentBody(XContentBuilder builder, boolean includeDefaults, Params params) throws IOException {
super.doXContentBody(builder, includeDefaults, params);
if (includeDefaults || nullValue != null) {
builder.field("null_value", nullValue);
}
}
@Override
public boolean hasDocValues() {
return false;
}
}