/*
* 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.
*/
package org.apache.lucene.facet.taxonomy;
import java.util.Arrays;
import org.apache.lucene.document.Document;
import org.apache.lucene.util.BytesRef;
/** Add an instance of this to your {@link Document} to add
* a facet label associated with a float. Use {@link
* TaxonomyFacetSumFloatAssociations} to aggregate float values
* per facet label at search time.
*
* @lucene.experimental */
public class FloatAssociationFacetField extends AssociationFacetField {
/** Creates this from {@code dim} and {@code path} and a
* float association */
public FloatAssociationFacetField(float assoc, String dim, String... path) {
super(floatToBytesRef(assoc), dim, path);
}
/** Encodes a {@code float} as a 4-byte {@link BytesRef}. */
public static BytesRef floatToBytesRef(float v) {
return IntAssociationFacetField.intToBytesRef(Float.floatToIntBits(v));
}
/** Decodes a previously encoded {@code float}. */
public static float bytesRefToFloat(BytesRef b) {
return Float.intBitsToFloat(IntAssociationFacetField.bytesRefToInt(b));
}
@Override
public String toString() {
return "FloatAssociationFacetField(dim=" + dim + " path=" + Arrays.toString(path) + " value=" + bytesRefToFloat(assoc) + ")";
}
}