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* 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.BinaryDocValues;
import org.apache.lucene.index.DocValues;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.index.SortedNumericDocValues;
import org.apache.lucene.store.ByteArrayDataInput;
import org.apache.lucene.util.Accountable;
import org.apache.lucene.util.ArrayUtil;
import org.apache.lucene.util.BytesRef;
import org.elasticsearch.common.util.ByteUtils;
import org.elasticsearch.index.Index;
import org.elasticsearch.index.fielddata.AtomicNumericFieldData;
import org.elasticsearch.index.fielddata.FieldDataType;
import org.elasticsearch.index.fielddata.IndexFieldData.XFieldComparatorSource.Nested;
import org.elasticsearch.index.fielddata.IndexNumericFieldData;
import org.elasticsearch.index.fielddata.SortedNumericDoubleValues;
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.MappedFieldType.Names;
import org.elasticsearch.search.MultiValueMode;
import java.io.IOException;
import java.util.Collection;
import java.util.Collections;
public class BinaryDVNumericIndexFieldData extends DocValuesIndexFieldData implements IndexNumericFieldData {
private final NumericType numericType;
public BinaryDVNumericIndexFieldData(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(final Object missingValue, final 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 AtomicNumericFieldData load(LeafReaderContext context) {
try {
final BinaryDocValues values = DocValues.getBinary(context.reader(), fieldNames.indexName());
if (numericType.isFloatingPoint()) {
return new AtomicDoubleFieldData(-1) {
@Override
public SortedNumericDoubleValues getDoubleValues() {
switch (numericType) {
case FLOAT:
return new BinaryAsSortedNumericFloatValues(values);
case DOUBLE:
return new BinaryAsSortedNumericDoubleValues(values);
default:
throw new IllegalArgumentException("" + numericType);
}
}
@Override
public Collection<Accountable> getChildResources() {
return Collections.emptyList();
}
};
} else {
return new AtomicLongFieldData(0) {
@Override
public SortedNumericDocValues getLongValues() {
return new BinaryAsSortedNumericDocValues(values);
}
@Override
public Collection<Accountable> getChildResources() {
return Collections.emptyList();
}
};
}
} catch (IOException e) {
throw new IllegalStateException("Cannot load doc values", e);
}
}
@Override
public AtomicNumericFieldData loadDirect(LeafReaderContext context) throws Exception {
return load(context);
}
@Override
public NumericType getNumericType() {
return numericType;
}
private static class BinaryAsSortedNumericDocValues extends SortedNumericDocValues {
private final BinaryDocValues values;
private BytesRef bytes;
private final ByteArrayDataInput in = new ByteArrayDataInput();
private long[] longs = new long[1];
private int count = 0;
BinaryAsSortedNumericDocValues(BinaryDocValues values) {
this.values = values;
}
@Override
public void setDocument(int docId) {
bytes = values.get(docId);
in.reset(bytes.bytes, bytes.offset, bytes.length);
if (!in.eof()) {
// first value uses vLong on top of zig-zag encoding, then deltas are encoded using vLong
long previousValue = longs[0] = ByteUtils.zigZagDecode(ByteUtils.readVLong(in));
count = 1;
while (!in.eof()) {
longs = ArrayUtil.grow(longs, count + 1);
previousValue = longs[count++] = previousValue + ByteUtils.readVLong(in);
}
} else {
count = 0;
}
}
@Override
public int count() {
return count;
}
@Override
public long valueAt(int index) {
return longs[index];
}
}
private static class BinaryAsSortedNumericDoubleValues extends SortedNumericDoubleValues {
private final BinaryDocValues values;
private BytesRef bytes;
private int valueCount = 0;
BinaryAsSortedNumericDoubleValues(BinaryDocValues values) {
this.values = values;
}
@Override
public void setDocument(int docId) {
bytes = values.get(docId);
assert bytes.length % 8 == 0;
valueCount = bytes.length / 8;
}
@Override
public int count() {
return valueCount;
}
@Override
public double valueAt(int index) {
return ByteUtils.readDoubleLE(bytes.bytes, bytes.offset + index * 8);
}
}
private static class BinaryAsSortedNumericFloatValues extends SortedNumericDoubleValues {
private final BinaryDocValues values;
private BytesRef bytes;
private int valueCount = 0;
BinaryAsSortedNumericFloatValues(BinaryDocValues values) {
this.values = values;
}
@Override
public void setDocument(int docId) {
bytes = values.get(docId);
assert bytes.length % 4 == 0;
valueCount = bytes.length / 4;
}
@Override
public int count() {
return valueCount;
}
@Override
public double valueAt(int index) {
return ByteUtils.readFloatLE(bytes.bytes, bytes.offset + index * 4);
}
}
}