/*
 * 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.
 */

using System;

namespace Lucene.Net.Search
{
	
	
	/// <summary> Expert: A ScoreDoc which also contains information about
	/// how to sort the referenced document.  In addition to the
	/// document number and score, this object contains an array
	/// of values for the document from the field(s) used to sort.
	/// For example, if the sort criteria was to sort by fields
	/// "a", "b" then "c", the <code>fields</code> object array
	/// will have three elements, corresponding respectively to
	/// the term values for the document in fields "a", "b" and "c".
	/// The class of each element in the array will be either
	/// Integer, Float or String depending on the type of values
	/// in the terms of each field.
	/// 
	/// <p>Created: Feb 11, 2004 1:23:38 PM
	/// 
	/// </summary>
	/// <author>   Tim Jones (Nacimiento Software)
	/// </author>
	/// <since>   lucene 1.4
	/// </since>
	/// <version>  $Id: FieldDoc.java 472959 2006-11-09 16:21:50Z yonik $
	/// </version>
	/// <seealso cref="ScoreDoc">
	/// </seealso>
	/// <seealso cref="TopFieldDocs">
	/// </seealso>
    [Serializable]
    public class FieldDoc : ScoreDoc
    {
		
        /// <summary>Expert: The values which are used to sort the referenced document.
        /// The order of these will match the original sort criteria given by a
        /// Sort object.  Each Object will be either an Integer, Float or String,
        /// depending on the type of values in the terms of the original field.
        /// </summary>
        /// <seealso cref="Sort">
        /// </seealso>
        /// <seealso cref="Searcher#Search(Query,Filter,int,Sort)">
        /// </seealso>
#if !FRAMEWORK_1_1
        [NonSerialized]     // Do not serialize "fields". Instead serialize "fieldsClone"
#endif
        public System.IComparable[] fields;
		
        /// <summary>Expert: Creates one of these objects with empty sort information. </summary>
        public FieldDoc(int doc, float score) : base(doc, score)
        {
        }
		
        /// <summary>Expert: Creates one of these objects with the given sort information. </summary>
        public FieldDoc(int doc, float score, System.IComparable[] fields) : base(doc, score)
        {
            this.fields = fields;
        }

#if !FRAMEWORK_1_1
#region SERIALIZATION
        internal object[] fieldsClone = null;

        [System.Runtime.Serialization.OnSerializing]
        void OnSerializing(System.Runtime.Serialization.StreamingContext context)
        {
            if (fields == null) return;

            // Copy "fields" to "fieldsClone"
            fieldsClone = new object[fields.Length];
            for (int i = 0; i < fields.Length; i++)
            {
                fieldsClone[i] = fields[i];
            }
        }

        [System.Runtime.Serialization.OnDeserialized]
        void OnDeserialized(System.Runtime.Serialization.StreamingContext context)
        {
            if (fieldsClone == null) return;

            // Form "fields" from "fieldsClone"
            fields = new IComparable[fieldsClone.Length];
            for (int i = 0; i < fields.Length; i++)
            {
                fields[i] = (IComparable)fieldsClone[i];
            }
        }
#endregion
#endif
    }
}