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DatabaseNamespace.cs
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DatabaseNamespace.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 System;
using MongoDB.Driver.Core.Misc;
namespace MongoDB.Driver
{
/// <summary>
/// Represents a database namespace.
/// </summary>
public sealed class DatabaseNamespace : IEquatable<DatabaseNamespace>
{
// static fields
private static readonly DatabaseNamespace __admin = new DatabaseNamespace("admin");
// static properties
/// <summary>
/// Gets the admin database namespace.
/// </summary>
/// <value>
/// The admin database namespace.
/// </value>
public static DatabaseNamespace Admin
{
get { return __admin; }
}
// static methods
/// <summary>
/// Determines whether the specified database name is valid.
/// </summary>
/// <param name="name">The database name.</param>
/// <returns>True if the database name is valid.</returns>
public static bool IsValid(string name)
{
if (string.IsNullOrWhiteSpace(name))
{
return false;
}
var index = name.IndexOfAny(new[] { '\0', '.' });
return index == -1;
}
// fields
private readonly string _databaseName;
// constructors
/// <summary>
/// Initializes a new instance of the <see cref="DatabaseNamespace"/> class.
/// </summary>
/// <param name="databaseName">The name of the database.</param>
public DatabaseNamespace(string databaseName)
{
Ensure.IsNotNull(databaseName, nameof(databaseName));
_databaseName = Ensure.That(databaseName, IsValid, nameof(databaseName), "Database names must be non-empty and not contain '.' or the null character.");
}
// properties
internal CollectionNamespace CommandCollection
{
get { return new CollectionNamespace(this, "$cmd"); }
}
/// <summary>
/// Gets the name of the database.
/// </summary>
/// <value>
/// The name of the database.
/// </value>
public string DatabaseName
{
get { return _databaseName; }
}
internal CollectionNamespace SystemIndexesCollection
{
get { return new CollectionNamespace(this, "system.indexes"); }
}
internal CollectionNamespace SystemNamespacesCollection
{
get { return new CollectionNamespace(this, "system.namespaces"); }
}
// methods
/// <inheritdoc/>
public bool Equals(DatabaseNamespace other)
{
if (other == null)
{
return false;
}
return _databaseName == other._databaseName;
}
/// <inheritdoc/>
public override bool Equals(object obj)
{
return Equals(obj as DatabaseNamespace);
}
/// <inheritdoc/>
public override int GetHashCode()
{
return _databaseName.GetHashCode();
}
/// <inheritdoc/>
public override string ToString()
{
return _databaseName;
}
}
}