package org.apache.lucene.queryParser.standard.config;

/**
 * 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.
 */

import org.apache.lucene.queryParser.core.config.QueryConfigHandler;
import org.apache.lucene.queryParser.standard.processors.PhraseSlopQueryNodeProcessor;
import org.apache.lucene.search.FuzzyQuery;
import org.apache.lucene.util.AttributeImpl;

/**
 * This attribute is used by {@link PhraseSlopQueryNodeProcessor} processor and
 * must be defined in the {@link QueryConfigHandler}. This attribute tells the
 * processor what is the default phrase slop when no slop is defined in a
 * phrase. <br/>
 * 
 * @see org.apache.lucene.queryParser.standard.config.FuzzyAttribute
 */
public class FuzzyAttributeImpl extends AttributeImpl 
				implements FuzzyAttribute {

  private static final long serialVersionUID = -2104763012527049527L;

  private int prefixLength = FuzzyQuery.defaultPrefixLength;

  private float minSimilarity = FuzzyQuery.defaultMinSimilarity;

  public FuzzyAttributeImpl() {
    // empty constructor
  }

  public void setPrefixLength(int prefixLength) {
    this.prefixLength = prefixLength;
  }

  public int getPrefixLength() {
    return this.prefixLength;
  }

  public void setFuzzyMinSimilarity(float minSimilarity) {
    this.minSimilarity = minSimilarity;
  }

  public float getFuzzyMinSimilarity() {
    return this.minSimilarity;
  }

  @Override
  public void clear() {
    throw new UnsupportedOperationException();
  }

  @Override
  public void copyTo(AttributeImpl target) {
    throw new UnsupportedOperationException();
  }

  @Override
  public boolean equals(Object other) {

    if (other instanceof FuzzyAttributeImpl
        && ((FuzzyAttributeImpl) other).prefixLength == this.prefixLength) {

      return true;

    }

    return false;

  }

  @Override
  public int hashCode() {
    return Integer.valueOf(this.prefixLength).hashCode();
  }

  @Override
  public String toString() {
    return "<fuzzyAttribute prefixLength=" + this.prefixLength + "/>";
  }

}