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//---------------------------------------------------------------------
// <copyright file="MetadataArtifactLoaderComposite.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//
// @owner Microsoft
// @backupOwner Microsoft
//---------------------------------------------------------------------
using System.Collections.Generic;
using System.Collections;
using System.Diagnostics;
using System.Globalization;
using System.Reflection;
using System.Text;
using System.Xml;
using System.Data.Mapping;
using System.IO;
using System.Security;
using System.Security.Permissions;
using System.Collections.ObjectModel;
namespace System.Data.Metadata.Edm
{
/// <summary>
/// This class represents a super-collection (a collection of collections)
/// of artifact resources. Typically, this "meta-collection" would contain
/// artifacts represented as individual files, directories (which are in
/// turn collections of files), and embedded resources.
/// </summary>
/// <remarks>This is the root class for access to all loader objects.</remarks>
internal class MetadataArtifactLoaderComposite : MetadataArtifactLoader, IEnumerable<MetadataArtifactLoader>
{
/// <summary>
/// The list of loaders aggregated by the composite.
/// </summary>
private readonly ReadOnlyCollection<MetadataArtifactLoader> _children;
/// <summary>
/// Constructor - loads all resources into the _children collection
/// </summary>
/// <param name="children">A list of collections to aggregate</param>
public MetadataArtifactLoaderComposite(List<MetadataArtifactLoader> children)
{
Debug.Assert(children != null);
_children = new List<MetadataArtifactLoader>(children).AsReadOnly();
}
public override string Path
{
get { return string.Empty; }
}
public override void CollectFilePermissionPaths(List<string> paths, DataSpace spaceToGet)
{
foreach (MetadataArtifactLoader loader in _children)
{
loader.CollectFilePermissionPaths(paths, spaceToGet);
}
}
public override bool IsComposite
{
get
{
return true;
}
}
/// <summary>
/// Get the list of paths to all artifacts in the original, unexpanded form
/// </summary>
/// <returns>A List of strings identifying paths to all resources</returns>
public override List<string> GetOriginalPaths()
{
List<string> list = new List<string>();
foreach (MetadataArtifactLoader loader in _children)
{
list.AddRange(loader.GetOriginalPaths());
}
return list;
}
/// <summary>
/// Get paths to artifacts for a specific DataSpace, in the original, unexpanded
/// form
/// </summary>
/// <param name="spaceToGet">The DataSpace for the artifacts of interest</param>
/// <returns>A List of strings identifying paths to all artifacts for a specific DataSpace</returns>
public override List<string> GetOriginalPaths(DataSpace spaceToGet)
{
List<string> list = new List<string>();
foreach (MetadataArtifactLoader loader in _children)
{
list.AddRange(loader.GetOriginalPaths(spaceToGet));
}
return list;
}
/// <summary>
/// Get paths to artifacts for a specific DataSpace.
/// </summary>
/// <param name="spaceToGet">The DataSpace for the artifacts of interest</param>
/// <returns>A List of strings identifying paths to all artifacts for a specific DataSpace</returns>
public override List<string> GetPaths(DataSpace spaceToGet)
{
List<string> list = new List<string>();
foreach (MetadataArtifactLoader loader in _children)
{
list.AddRange(loader.GetPaths(spaceToGet));
}
return list;
}
/// <summary>
/// Get paths to all artifacts
/// </summary>
/// <returns>A List of strings identifying paths to all resources</returns>
public override List<string> GetPaths()
{
List<string> list = new List<string>();
foreach (MetadataArtifactLoader resource in _children)
{
list.AddRange(resource.GetPaths());
}
return list;
}
/// <summary>
/// Aggregates all resource streams from the _children collection
/// </summary>
/// <returns>A List of XmlReader objects; cannot be null</returns>
public override List<XmlReader> GetReaders(Dictionary<MetadataArtifactLoader, XmlReader> sourceDictionary)
{
List<XmlReader> list = new List<XmlReader>();
foreach (MetadataArtifactLoader resource in _children)
{
list.AddRange(resource.GetReaders(sourceDictionary));
}
return list;
}
/// <summary>
/// Get XmlReaders for a specific DataSpace.
/// </summary>
/// <param name="spaceToGet">The DataSpace corresponding to the requested artifacts</param>
/// <returns>A List of XmlReader objects</returns>
public override List<XmlReader> CreateReaders(DataSpace spaceToGet)
{
List<XmlReader> list = new List<XmlReader>();
foreach (MetadataArtifactLoader resource in _children)
{
list.AddRange(resource.CreateReaders(spaceToGet));
}
return list;
}
#region IEnumerable<MetadataArtifactLoader> Members
public IEnumerator<MetadataArtifactLoader> GetEnumerator()
{
return this._children.GetEnumerator();
}
#endregion
#region IEnumerable Members
IEnumerator IEnumerable.GetEnumerator()
{
return this._children.GetEnumerator();
}
#endregion
}
}
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