public PayloadNearQuery(SpanQuery[] clauses,
    int slop,
    boolean inOrder) 
{
    this(clauses, slop, inOrder, new AveragePayloadFunction());
}

 public PayloadNearQuery(SpanQuery[] clauses,
    int slop,
    boolean inOrder,
    PayloadFunction function) 
{
    super(clauses, slop, inOrder);
    fieldName = clauses[0].getField(); // all clauses must have same field
    this.function = function;
}

 public Object clone() 
{
    int sz = clauses.size();
    SpanQuery[] newClauses = new SpanQuery[sz];
    for (int i = 0; i <  sz; i++) {
      newClauses[i] = (SpanQuery) clauses.get(i).clone();
    }
    PayloadNearQuery boostingNearQuery = new PayloadNearQuery(newClauses, slop,
        inOrder);
    boostingNearQuery.setBoost(getBoost());
    return boostingNearQuery;
}

 public Weight createWeight(Searcher searcher) throws IOException 
{
    return new PayloadNearSpanWeight(this, searcher);
}

 public boolean equals(Object obj) 
{
    if (this == obj)
      return true;
    if (!super.equals(obj))
      return false;
    if (getClass() != obj.getClass())
      return false;
    PayloadNearQuery other = (PayloadNearQuery) obj;
    if (fieldName == null) {
      if (other.fieldName != null)
        return false;
    } else if (!fieldName.equals(other.fieldName))
      return false;
    if (function == null) {
      if (other.function != null)
        return false;
    } else if (!function.equals(other.function))
      return false;
    return true;
}

 public int hashCode() 
{
    final int prime = 31;
    int result = super.hashCode();
    result = prime * result + ((fieldName == null) ? 0 : fieldName.hashCode());
    result = prime * result + ((function == null) ? 0 : function.hashCode());
    return result;
}

 public String toString(String field) 
{
    StringBuilder buffer = new StringBuilder();
    buffer.append("payloadNear([");
    Iterator< SpanQuery > i = clauses.iterator();
    while (i.hasNext()) {
      SpanQuery clause = i.next();
      buffer.append(clause.toString(field));
      if (i.hasNext()) {
        buffer.append(", ");
      }
    }
    buffer.append("], ");
    buffer.append(slop);
    buffer.append(", ");
    buffer.append(inOrder);
    buffer.append(")");
    buffer.append(ToStringUtils.boost(getBoost()));
    return buffer.toString();
}