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SearchDefinition.cs
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SearchDefinition.cs
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/* Copyright 2010-present MongoDB Inc.
*
* Licensed 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 MongoDB.Bson;
using MongoDB.Driver.Core.Misc;
namespace MongoDB.Driver.Search
{
/// <summary>
/// Base class for search definitions.
/// </summary>
/// <typeparam name="TDocument">The type of the document.</typeparam>
public abstract class SearchDefinition<TDocument>
{
/// <summary>
/// Renders the search definition to a <see cref="BsonDocument" />.
/// </summary>
/// <param name="renderContext">The render context.</param>
/// <returns>
/// A <see cref="BsonDocument" />.
/// </returns>
public abstract BsonDocument Render(SearchDefinitionRenderContext<TDocument> renderContext);
/// <summary>
/// Performs an implicit conversion from a BSON document to a <see cref="SearchDefinition{TDocument}"/>.
/// </summary>
/// <param name="document">The BSON document specifying the search definition.</param>
/// <returns>
/// The result of the conversion.
/// </returns>
public static implicit operator SearchDefinition<TDocument>(BsonDocument document) =>
document != null ? new BsonDocumentSearchDefinition<TDocument>(document) : null;
/// <summary>
/// Performs an implicit conversion from a string to a <see cref="SearchDefinition{TDocument}"/>.
/// </summary>
/// <param name="json">The string specifying the search definition in JSON.</param>
/// <returns>
/// The result of the conversion.
/// </returns>
public static implicit operator SearchDefinition<TDocument>(string json) =>
json != null ? new JsonSearchDefinition<TDocument>(json) : null;
}
/// <summary>
/// A search definition based on a BSON document.
/// </summary>
/// <typeparam name="TDocument">The type of the document.</typeparam>
public sealed class BsonDocumentSearchDefinition<TDocument> : SearchDefinition<TDocument>
{
/// <summary>
/// Initializes a new instance of the <see cref="BsonDocumentSearchDefinition{TDocument}"/> class.
/// </summary>
/// <param name="document">The BSON document specifying the search definition.</param>
public BsonDocumentSearchDefinition(BsonDocument document)
{
Document = Ensure.IsNotNull(document, nameof(document));
}
/// <summary>
/// Gets the BSON document.
/// </summary>
public BsonDocument Document { get; private set; }
/// <inheritdoc />
public override BsonDocument Render(SearchDefinitionRenderContext<TDocument> renderContext) =>
(BsonDocument)Document.Clone();
}
/// <summary>
/// A search definition based on a JSON string.
/// </summary>
/// <typeparam name="TDocument">The type of the document.</typeparam>
public sealed class JsonSearchDefinition<TDocument> : SearchDefinition<TDocument>
{
/// <summary>
/// Initializes a new instance of the <see cref="JsonSearchDefinition{TDocument}"/> class.
/// </summary>
/// <param name="json">The JSON string specifying the search definition.</param>
public JsonSearchDefinition(string json)
{
Json = Ensure.IsNotNullOrEmpty(json, nameof(json));
}
/// <summary>
/// Gets the JSON string.
/// </summary>
public string Json { get; private set; }
/// <inheritdoc />
public override BsonDocument Render(SearchDefinitionRenderContext<TDocument> renderContext) =>
BsonDocument.Parse(Json);
}
internal abstract class OperatorSearchDefinition<TDocument> : SearchDefinition<TDocument>
{
private protected enum OperatorType
{
Autocomplete,
Compound,
EmbeddedDocument,
Equals,
Exists,
Facet,
GeoShape,
GeoWithin,
In,
MoreLikeThis,
Near,
Phrase,
QueryString,
Range,
Regex,
Search,
Span,
Term,
Text,
Wildcard
}
private readonly OperatorType _operatorType;
// _path and _score used by many but not all subclasses
protected readonly SearchPathDefinition<TDocument> _path;
protected readonly SearchScoreDefinition<TDocument> _score;
private protected OperatorSearchDefinition(OperatorType operatorType)
: this(operatorType, null)
{
}
private protected OperatorSearchDefinition(OperatorType operatorType, SearchScoreDefinition<TDocument> score)
{
_operatorType = operatorType;
_score = score;
}
private protected OperatorSearchDefinition(OperatorType operatorType, SearchPathDefinition<TDocument> path, SearchScoreDefinition<TDocument> score)
{
_operatorType = operatorType;
_path = Ensure.IsNotNull(path, nameof(path));
_score = score;
}
/// <inheritdoc />
public sealed override BsonDocument Render(SearchDefinitionRenderContext<TDocument> renderContext)
{
var renderedArgs = RenderArguments(renderContext);
renderedArgs.Add("path", () => _path.Render(renderContext), _path != null);
renderedArgs.Add("score", () => _score.Render(renderContext), _score != null);
return new(_operatorType.ToCamelCase(), renderedArgs);
}
private protected virtual BsonDocument RenderArguments(SearchDefinitionRenderContext<TDocument> renderContext) => new();
}
}