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.AbstractQueryConfig;
import org.apache.lucene.queryParser.core.config.ConfigAttribute;
import org.apache.lucene.queryParser.core.config.QueryConfigHandler;
import org.apache.lucene.queryParser.standard.config.StandardQueryConfigHandler.ConfigurationKeys;
import org.apache.lucene.queryParser.standard.processors.PhraseSlopQueryNodeProcessor;
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.DefaultOperatorAttribute
 * 
 * @deprecated
 * 
 */
@Deprecated
public class DefaultPhraseSlopAttributeImpl extends AttributeImpl 
				implements DefaultPhraseSlopAttribute, ConfigAttribute {

  private static final long serialVersionUID = -2104763012527049527L;
  
  private AbstractQueryConfig config;

  { enableBackwards = false; }
  
  public DefaultPhraseSlopAttributeImpl() {}

  public void setDefaultPhraseSlop(int defaultPhraseSlop) {
    this.config.set(ConfigurationKeys.PHRASE_SLOP, defaultPhraseSlop);
  }

  public int getDefaultPhraseSlop() {
    return config.get(ConfigurationKeys.PHRASE_SLOP, 0);
  }

  @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 DefaultPhraseSlopAttributeImpl
        && ((DefaultPhraseSlopAttributeImpl) other).getDefaultPhraseSlop() == getDefaultPhraseSlop()) {

      return true;

    }

    return false;

  }

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

  @Override
  public String toString() {
    return "<defaultPhraseSlop defaultPhraseSlop=" + getDefaultPhraseSlop()
        + "/>";
  }
  
  public void setQueryConfigHandler(AbstractQueryConfig config) {
    this.config = config;
    
    if (!config.has(ConfigurationKeys.PHRASE_SLOP)) {
      setDefaultPhraseSlop(0);
    }
    
  }

}