package org.apache.blur.analysis.type;
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.
*/
import java.util.Map;
import org.apache.blur.thrift.generated.Column;
import org.apache.hadoop.conf.Configuration;
import org.apache.lucene.document.DoubleField;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.FieldType;
import org.apache.lucene.search.NumericRangeQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.SortField;
import org.apache.lucene.search.SortField.Type;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.util.NumericUtils;
public class DoubleFieldTypeDefinition extends NumericFieldTypeDefinition {
public static final String NAME = "double";
private FieldType _typeStored;
private FieldType _typeNotStored;
@Override
public String getName() {
return NAME;
}
@Override
public void configure(String fieldNameForThisInstance, Map<String, String> properties, Configuration configuration) {
String precisionStepStr = properties.get(NUMERIC_PRECISION_STEP);
if (precisionStepStr != null) {
_precisionStep = Integer.parseInt(precisionStepStr);
_typeStored = new FieldType(DoubleField.TYPE_STORED);
_typeStored.setNumericPrecisionStep(_precisionStep);
_typeStored.freeze();
_typeNotStored = new FieldType(DoubleField.TYPE_NOT_STORED);
_typeNotStored.setNumericPrecisionStep(_precisionStep);
_typeNotStored.freeze();
} else {
_typeStored = DoubleField.TYPE_STORED;
_typeNotStored = DoubleField.TYPE_NOT_STORED;
}
}
@Override
public Iterable<? extends Field> getFieldsForColumn(String family, Column column) {
String name = getName(family, column.getName());
double value = Double.parseDouble(column.getValue());
DoubleField field = new DoubleField(name, value, _typeStored);
if (isSortEnable()) {
return addSort(name, Double.doubleToRawLongBits(value), field);
}
return makeIterable(field);
}
@Override
public Iterable<? extends Field> getFieldsForSubColumn(String family, Column column, String subName) {
String name = getName(family, column.getName(), subName);
double value = Double.parseDouble(column.getValue());
DoubleField field = new DoubleField(name, value, _typeNotStored);
if (isSortEnable()) {
return addSort(name, Double.doubleToRawLongBits(value), field);
}
return makeIterable(field);
}
@Override
public Query getNewRangeQuery(String field, String part1, String part2, boolean startInclusive, boolean endInclusive) {
double p1 = parseDouble(part1);
double p2 = parseDouble(part2);
return NumericRangeQuery.newDoubleRange(field, _precisionStep, p1, p2, startInclusive, endInclusive);
}
@Override
public SortField getSortField(boolean reverse) {
if (reverse) {
return new SortField(getFieldName(), Type.DOUBLE, reverse);
}
return new SortField(getFieldName(), Type.DOUBLE);
}
private double parseDouble(String number) {
if (number.toLowerCase().equals(MIN)) {
return Double.MIN_VALUE;
} else if (number.toLowerCase().equals(MAX)) {
return Double.MAX_VALUE;
} else {
return Double.parseDouble(number);
}
}
@Override
public String readTerm(BytesRef byteRef) {
if(NumericUtils.getPrefixCodedLongShift(byteRef) == 0)
return NumericUtils.sortableLongToDouble(NumericUtils.prefixCodedToLong(byteRef))+"";
return null;
}
}