/*
* Copyright 2014, Stratio.
*
* Licensed 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 com.stratio.cassandra.index.schema;
import org.apache.cassandra.db.marshal.*;
import org.apache.commons.lang3.builder.ToStringBuilder;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.document.DoubleField;
import org.apache.lucene.document.Field;
import org.apache.lucene.search.SortField;
import org.apache.lucene.search.SortField.Type;
import org.codehaus.jackson.annotate.JsonCreator;
import org.codehaus.jackson.annotate.JsonProperty;
/**
* A {@link ColumnMapper} to map a double field.
*
* @author Andres de la Pena <adelapena@stratio.com>
*/
public class ColumnMapperDouble extends ColumnMapper<Double>
{
private Float DEFAULT_BOOST = 1.0f;
private final Float boost;
@JsonCreator
public ColumnMapperDouble(@JsonProperty("boost") Float boost)
{
super(new AbstractType<?>[]{
AsciiType.instance, UTF8Type.instance, Int32Type.instance, LongType.instance,
IntegerType.instance, FloatType.instance, DoubleType.instance, DecimalType.instance});
this.boost = boost == null ? DEFAULT_BOOST : boost;
}
@Override
public Analyzer analyzer()
{
return EMPTY_ANALYZER;
}
@Override
public Double indexValue(String name, Object value)
{
if (value == null)
{
return null;
}
else if (value instanceof Number)
{
return ((Number) value).doubleValue();
}
else if (value instanceof String)
{
String svalue = (String) value;
try
{
return Double.valueOf(svalue);
}
catch (NumberFormatException e)
{
String message = String.format("Field %s requires a base 10 double, but found \"%s\"", name, svalue);
throw new IllegalArgumentException(message);
}
}
else
{
String message = String.format("Field %s requires a base 10 double, but found \"%s\"", name, value);
throw new IllegalArgumentException(message);
}
}
@Override
public Double queryValue(String name, Object value)
{
return indexValue(name, value);
}
@Override
public Field field(String name, Object value)
{
Double number = indexValue(name, value);
Field field = new DoubleField(name, number, STORE);
field.setBoost(boost);
return field;
}
@Override
public SortField sortField(String field, boolean reverse)
{
return new SortField(field, Type.DOUBLE, reverse);
}
@Override
public Class<Double> baseClass()
{
return Double.class;
}
@Override
public String toString()
{
return new ToStringBuilder(this).append("boost", boost).toString();
}
}