/*
* 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;
using System.Linq;
using System.Collections.Generic;
using Lucene.Net.Support;
namespace Lucene.Net.Documents
{
/// A based on a Map of field names to s
[Serializable]
public class MapFieldSelector : FieldSelector
{
internal IDictionary fieldSelections;
/// Create a a MapFieldSelector
/// maps from field names (String) to s
///
public MapFieldSelector(IDictionary fieldSelections)
{
this.fieldSelections = fieldSelections;
}
/// Create a a MapFieldSelector
/// fields to LOAD. List of Strings. All other fields are NO_LOAD.
///
public MapFieldSelector(IList fields)
{
fieldSelections = new HashMap(fields.Count * 5 / 3);
foreach(var field in fields)
fieldSelections[field] = FieldSelectorResult.LOAD;
}
/// Create a a MapFieldSelector
/// fields to LOAD. All other fields are NO_LOAD.
///
public MapFieldSelector(params System.String[] fields)
: this(fields.ToList()) // TODO: this is slow
{
}
/// Load field according to its associated value in fieldSelections
/// a field name
///
/// the fieldSelections value that field maps to or NO_LOAD if none.
///
public virtual FieldSelectorResult Accept(System.String field)
{
FieldSelectorResult selection = fieldSelections[field];
return selection != FieldSelectorResult.INVALID ? selection : FieldSelectorResult.NO_LOAD; // TODO: See FieldSelectorResult
}
}
}