package org.apache.lucene.facet.index;

import org.apache.lucene.facet.index.attributes.CategoryProperty;

/**
 * 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.
 */

/**
 * An empty attribute for testing.
 */
public class DummyProperty implements CategoryProperty {

  @Override
  public boolean equals(Object o) {
    if (o instanceof DummyProperty) {
      return true;
    }
    return false;
  }

  @Override
  public int hashCode() {
    return super.hashCode();
  }
  
  public void merge(CategoryProperty other) {
    throw new UnsupportedOperationException(
        "Merging dummy attribute is prohibited");
  }
  
  @Override
  public String toString() {
    return "I am dummy property";
  }

}
