/**
* Copyright 2014 National University of Ireland, Galway.
*
* This file is part of the SIREn project. Project and contact information:
*
* https://github.com/rdelbru/SIREn
*
* 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 org.sindice.siren.analysis;
import java.io.IOException;
import java.io.Reader;
import org.apache.lucene.analysis.Tokenizer;
import org.apache.lucene.document.FieldType.NumericType;
import org.apache.lucene.util.NumericUtils;
import org.sindice.siren.util.XSDPrimitiveTypeParser;
/**
* An implementation of the {@link NumericAnalyzer} for float value.
*/
public class FloatNumericAnalyzer extends NumericAnalyzer {
public FloatNumericAnalyzer(final int precisionStep) {
super(precisionStep);
}
@Override
protected TokenStreamComponents createComponents(final String fieldName,
final Reader reader) {
final Tokenizer sink = new NumericTokenizer(reader, new FloatNumericParser(), precisionStep);
return new TokenStreamComponents(sink);
}
@Override
public FloatNumericParser getNumericParser() {
return new FloatNumericParser();
}
public class FloatNumericParser extends NumericParser<Float> {
@Override
public long parseAndConvert(final Reader input) throws IOException {
return NumericUtils.floatToSortableInt(this.parse(input));
}
@Override
public NumericType getNumericType() {
return NumericType.FLOAT;
}
@Override
public int getValueSize() {
return 32;
}
@Override
public Float parse(final Reader input)
throws IOException {
return XSDPrimitiveTypeParser.parseFloat(input);
}
}
}