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/*
 * 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.codecs;

import org.apache.lucene.codecs.blocktree.BlockTreeTermsReader; // javadocs
import org.apache.lucene.index.OrdTermState;
import org.apache.lucene.index.TermState;

/**
 * Holds all state required for {@link PostingsReaderBase}
 * to produce a {@link org.apache.lucene.index.PostingsEnum} without re-seeking the
 * terms dict.
 *
 * @lucene.internal
 */
public class BlockTermState extends OrdTermState {
  /** how many docs have this term */
  public int docFreq;
  /** total number of occurrences of this term */
  public long totalTermFreq;

  /** the term's ord in the current block */
  public int termBlockOrd;
  /** fp into the terms dict primary file (_X.tim) that holds this term */
  // TODO: update BTR to nuke this
  public long blockFilePointer;

  /** True if this term is "real" (e.g., not an auto-prefix term or
   *  some other "secret" term; currently only {@link BlockTreeTermsReader}
   *  sets this). */
  public boolean isRealTerm = true;

  /** Sole constructor. (For invocation by subclass 
   *  constructors, typically implicit.) */
  protected BlockTermState() {
  }

  @Override
  public void copyFrom(TermState _other) {
    assert _other instanceof BlockTermState : "can not copy from " + _other.getClass().getName();
    BlockTermState other = (BlockTermState) _other;
    super.copyFrom(_other);
    docFreq = other.docFreq;
    totalTermFreq = other.totalTermFreq;
    termBlockOrd = other.termBlockOrd;
    blockFilePointer = other.blockFilePointer;
    isRealTerm = other.isRealTerm;
  }

  @Override
  public boolean isRealTerm() {
    return isRealTerm;
  }

  @Override
  public String toString() {
    return "docFreq=" + docFreq + " totalTermFreq=" + totalTermFreq + " termBlockOrd=" + termBlockOrd + " blockFP=" + blockFilePointer + " isRealTerm=" + isRealTerm;
  }
}