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package org.apache.lucene.facet.index.attributes;
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* A {@link CategoryProperty} holding the ordinal from the taxonomy of the
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* current category in {@link CategoryAttribute}.
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* Ordinal properties are added internally during processing of category
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* streams, and it is recommended not to use it externally.
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* @lucene.experimental
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public class OrdinalProperty implements CategoryProperty {
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protected int ordinal = -1;
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public int getOrdinal() {
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public boolean hasBeenSet() {
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return this.ordinal >= 0;
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public void setOrdinal(int value) {
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public boolean equals(Object other) {
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if (!(other instanceof OrdinalProperty)) {
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OrdinalProperty o = (OrdinalProperty) other;
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return o.ordinal == this.ordinal;
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public int hashCode() {
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public void merge(CategoryProperty other) {
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throw new UnsupportedOperationException(
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"Merging ordinal attributes is prohibited");