/*
* 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.fielddata.plain;
import com.google.common.base.Preconditions;
import org.apache.lucene.index.*;
import org.apache.lucene.util.Accountable;
import org.apache.lucene.util.NumericUtils;
import org.elasticsearch.ElasticsearchIllegalStateException;
import org.elasticsearch.index.Index;
import org.elasticsearch.index.fielddata.*;
import org.elasticsearch.index.fielddata.IndexFieldData.XFieldComparatorSource.Nested;
import org.elasticsearch.index.fielddata.fieldcomparator.DoubleValuesComparatorSource;
import org.elasticsearch.index.fielddata.fieldcomparator.FloatValuesComparatorSource;
import org.elasticsearch.index.fielddata.fieldcomparator.LongValuesComparatorSource;
import org.elasticsearch.index.mapper.FieldMapper.Names;
import org.elasticsearch.search.MultiValueMode;
import java.io.IOException;
import java.util.Collections;
/**
* FieldData backed by {@link LeafReader#getSortedNumericDocValues(String)}
* @see FieldInfo.DocValuesType#SORTED_NUMERIC
*/
public class SortedNumericDVIndexFieldData extends DocValuesIndexFieldData implements IndexNumericFieldData {
private final NumericType numericType;
public SortedNumericDVIndexFieldData(Index index, Names fieldNames, NumericType numericType, FieldDataType fieldDataType) {
super(index, fieldNames, fieldDataType);
Preconditions.checkArgument(numericType != null, "numericType must be non-null");
this.numericType = numericType;
}
@Override
public org.elasticsearch.index.fielddata.IndexFieldData.XFieldComparatorSource comparatorSource(Object missingValue, MultiValueMode sortMode, Nested nested) {
switch (numericType) {
case FLOAT:
return new FloatValuesComparatorSource(this, missingValue, sortMode, nested);
case DOUBLE:
return new DoubleValuesComparatorSource(this, missingValue, sortMode, nested);
default:
assert !numericType.isFloatingPoint();
return new LongValuesComparatorSource(this, missingValue, sortMode, nested);
}
}
@Override
public NumericType getNumericType() {
return numericType;
}
@Override
public AtomicNumericFieldData loadDirect(LeafReaderContext context) throws Exception {
return load(context);
}
@Override
public AtomicNumericFieldData load(LeafReaderContext context) {
final LeafReader reader = context.reader();
final String field = fieldNames.indexName();
switch (numericType) {
case FLOAT:
return new SortedNumericFloatFieldData(reader, field);
case DOUBLE:
return new SortedNumericDoubleFieldData(reader, field);
default:
return new SortedNumericLongFieldData(reader, field);
}
}
/**
* FieldData implementation for integral types.
* <p>
* Order of values within a document is consistent with
* {@link Long#compareTo(Long)}.
* <p>
* Although the API is multi-valued, most codecs in Lucene specialize
* for the case where documents have at most one value. In this case
* {@link DocValues#unwrapSingleton(SortedNumericDocValues)} will return
* the underlying single-valued NumericDocValues representation, and
* {@link DocValues#unwrapSingletonBits(SortedNumericDocValues)} will return
* a Bits matching documents that have a real value (as opposed to missing).
*/
static final class SortedNumericLongFieldData extends AtomicLongFieldData {
final LeafReader reader;
final String field;
SortedNumericLongFieldData(LeafReader reader, String field) {
super(0L);
this.reader = reader;
this.field = field;
}
@Override
public SortedNumericDocValues getLongValues() {
try {
return DocValues.getSortedNumeric(reader, field);
} catch (IOException e) {
throw new ElasticsearchIllegalStateException("Cannot load doc values", e);
}
}
@Override
public Iterable<? extends Accountable> getChildResources() {
return Collections.emptyList();
}
}
/**
* FieldData implementation for 32-bit float values.
* <p>
* Order of values within a document is consistent with
* {@link Float#compareTo(Float)}, hence the following reversible
* transformation is applied at both index and search:
* {code}
* bits ^ (bits >> 31) & 0x7fffffff
* {code}
* <p>
* Although the API is multi-valued, most codecs in Lucene specialize
* for the case where documents have at most one value. In this case
* {@link FieldData#unwrapSingleton(SortedNumericDoubleValues)} will return
* the underlying single-valued NumericDoubleValues representation, and
* {@link FieldData#unwrapSingletonBits(SortedNumericDoubleValues)} will return
* a Bits matching documents that have a real value (as opposed to missing).
*/
static final class SortedNumericFloatFieldData extends AtomicDoubleFieldData {
final LeafReader reader;
final String field;
SortedNumericFloatFieldData(LeafReader reader, String field) {
super(0L);
this.reader = reader;
this.field = field;
}
@Override
public SortedNumericDoubleValues getDoubleValues() {
try {
SortedNumericDocValues raw = DocValues.getSortedNumeric(reader, field);
NumericDocValues single = DocValues.unwrapSingleton(raw);
if (single != null) {
return FieldData.singleton(new SingleFloatValues(single), DocValues.unwrapSingletonBits(raw));
} else {
return new MultiFloatValues(raw);
}
} catch (IOException e) {
throw new ElasticsearchIllegalStateException("Cannot load doc values", e);
}
}
@Override
public Iterable<? extends Accountable> getChildResources() {
return Collections.emptyList();
}
}
/**
* Wraps a NumericDocValues and exposes a single 32-bit float per document.
*/
static final class SingleFloatValues extends NumericDoubleValues {
final NumericDocValues in;
SingleFloatValues(NumericDocValues in) {
this.in = in;
}
@Override
public double get(int docID) {
return NumericUtils.sortableIntToFloat((int) in.get(docID));
}
}
/**
* Wraps a SortedNumericDocValues and exposes multiple 32-bit floats per document.
*/
static final class MultiFloatValues extends SortedNumericDoubleValues {
final SortedNumericDocValues in;
MultiFloatValues(SortedNumericDocValues in) {
this.in = in;
}
@Override
public void setDocument(int doc) {
in.setDocument(doc);
}
@Override
public double valueAt(int index) {
return NumericUtils.sortableIntToFloat((int) in.valueAt(index));
}
@Override
public int count() {
return in.count();
}
}
/**
* FieldData implementation for 64-bit double values.
* <p>
* Order of values within a document is consistent with
* {@link Double#compareTo(Double)}, hence the following reversible
* transformation is applied at both index and search:
* {code}
* bits ^ (bits >> 63) & 0x7fffffffffffffffL
* {code}
* <p>
* Although the API is multi-valued, most codecs in Lucene specialize
* for the case where documents have at most one value. In this case
* {@link FieldData#unwrapSingleton(SortedNumericDoubleValues)} will return
* the underlying single-valued NumericDoubleValues representation, and
* {@link FieldData#unwrapSingletonBits(SortedNumericDoubleValues)} will return
* a Bits matching documents that have a real value (as opposed to missing).
*/
static final class SortedNumericDoubleFieldData extends AtomicDoubleFieldData {
final LeafReader reader;
final String field;
SortedNumericDoubleFieldData(LeafReader reader, String field) {
super(0L);
this.reader = reader;
this.field = field;
}
@Override
public SortedNumericDoubleValues getDoubleValues() {
try {
SortedNumericDocValues raw = DocValues.getSortedNumeric(reader, field);
return FieldData.sortableLongBitsToDoubles(raw);
} catch (IOException e) {
throw new ElasticsearchIllegalStateException("Cannot load doc values", e);
}
}
@Override
public Iterable<? extends Accountable> getChildResources() {
return Collections.emptyList();
}
}
}