/*
* 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.range;
/** Base class for a single labeled range.
*
* @lucene.experimental */
public abstract class Range {
/** Label that identifies this range. */
public final String label;
/** Sole constructor. */
protected Range(String label) {
if (label == null) {
throw new NullPointerException("label must not be null");
}
this.label = label;
}
/** Invoke this for a useless range. */
protected void failNoMatch() {
throw new IllegalArgumentException("range \"" + label + "\" matches nothing");
}
}