Perspective.cs source code in C# .NET

                        Code:
                         / Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / ndp / fx / src / DataEntity / System / Data / Metadata / Perspective.cs / 1 / Perspective.cs
                        
                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....],[....]
//--------------------------------------------------------------------- 
using System.Diagnostics; 

namespace System.Data.Metadata.Edm 
{
    using System.Collections.Generic;

    ///  
    /// Internal helper class for query
    ///  
    internal abstract class Perspective 
    {
        #region Constructors 
        /// 
        /// Creates a new instance of perspective class so that query can work
        /// ignorant of all spaces
        ///  
        /// runtime metadata container
        /// target dataspace for the perspective 
        internal Perspective(MetadataWorkspace metadataWorkspace, 
                             DataSpace targetDataspace)
        { 
            EntityUtil.CheckArgumentNull(metadataWorkspace, "metadataWorkspace");

            m_metadataWorkspace = metadataWorkspace;
            m_targetDataspace = targetDataspace; 
        }
        #endregion 
 
        #region Fields
        private MetadataWorkspace m_metadataWorkspace; 
        private DataSpace m_targetDataspace;
        #endregion

        #region Methods 

        ///  
        /// Given the type in the target space and the member name in the source space, 
        /// get the corresponding member in the target space
        /// For e.g.  consider a Conceptual Type 'Foo' with a member 'Bar' and a CLR type 
        /// 'XFoo' with a member 'YBar'. If one has a reference to Foo one can
        /// invoke GetMember(Foo,"YBar") to retrieve the member metadata for bar
        /// 
        /// The type in the target perspective 
        /// the name of the member in the source perspective
        /// Whether to do case-sensitive member look up or not 
        /// returns the member in target space, if a match is found 
        /// 
        internal virtual bool TryGetMember(StructuralType type, String memberName, bool ignoreCase, out EdmMember outMember) 
        {
            EntityUtil.CheckArgumentNull(type, "type");
            EntityUtil.CheckStringArgument(memberName, "memberName");
            outMember = null; 

            // If a normal member is not present, check for navigation property with that name 
            return type.Members.TryGetValue(memberName, ignoreCase, out outMember); 
        }
 
        /// 
        /// Returns the extent in the target space, for the given entity container
        /// 
        /// name of the entity container in target space 
        /// name of the extent
        /// Whether to do case-sensitive member look up or not 
        /// extent in target space, if a match is found 
        /// returns true, if a match is found otherwise returns false
        internal bool TryGetExtent(EntityContainer entityContainer, String extentName, bool ignoreCase, out EntitySetBase outSet) 
        {
            // There are no entity container and extents in the OSpace. So there is no mapping
            // involved. Hence the name should be a valid name in the CSpace.
            return entityContainer.BaseEntitySets.TryGetValue(extentName, ignoreCase, out outSet); 
        }
 
        ///  
        /// Get the default entity container
        /// returns null for any perspective other 
        /// than the CLR perspective
        /// 
        /// The default container
        internal virtual EntityContainer GetDefaultContainer() 
        {
            return null; 
        } 

        ///  
        /// Get an entity container based upon the strong name of the container
        /// If no entity container is found, returns null, else returns the first one/// 
        /// name of the entity container
        /// true for case-insensitive lookup 
        /// returns the entity container if a match is found
        /// returns true if a match is found, otherwise false 
        internal virtual bool TryGetEntityContainer(string name, bool ignoreCase, out EntityContainer entityContainer) 
        {
            return MetadataWorkspace.TryGetEntityContainer(name, ignoreCase, TargetDataspace, out entityContainer); 
        }

        /// 
        /// Gets the type with the given name in the target space 
        /// 
        /// full name of the type 
        /// true for case-insensitive lookup 
        /// TypeUsage for the type you are looking for
        /// returns true if a match is found, otherwise returns false 
        internal abstract bool TryGetTypeByName(string fullName, bool ignoreCase, out TypeUsage typeUsage);

        /// 
        /// Returns the list of all the function with the given name 
        /// 
        /// name of the function 
        /// namespace of the function 
        /// whether to do a case-insensitive lookup or not
        ///  
        internal System.Collections.ObjectModel.ReadOnlyCollection GetFunctions(
            string name, string namespaceName, bool ignoreCase)
        {
            EntityUtil.CheckStringArgument(name, "name"); 
            EntityUtil.CheckStringArgument(namespaceName, "namespaceName");
 
            string functionFullName = namespaceName + "." + name; 

            System.Collections.ObjectModel.ReadOnlyCollection functionOverloads; 

            // First lookup canonical functions
            EdmItemCollection edmItemCollection = (EdmItemCollection)m_metadataWorkspace.GetItemCollection(DataSpace.CSpace);
            functionOverloads = edmItemCollection.GetFunctions(functionFullName, ignoreCase); 
            if (null == functionOverloads || 0 == functionOverloads.Count)
            { 
                StoreItemCollection storeItemCollection = (StoreItemCollection)m_metadataWorkspace.GetItemCollection(DataSpace.SSpace); 
                return storeItemCollection.GetCTypeFunctions(functionFullName, ignoreCase);
            } 

            return functionOverloads;
        }
 
        /// 
        /// Return the metadata workspace 
        ///  
        internal MetadataWorkspace MetadataWorkspace
        { 
            get
            {
                return m_metadataWorkspace;
            } 
        }
 
        ///  
        /// returns the primitive type for a given primitive type kind.
        ///  
        /// 
        /// 
        /// 
        internal virtual bool TryGetMappedPrimitiveType(PrimitiveTypeKind primitiveTypeKind, out PrimitiveType primitiveType) 
        {
            primitiveType = m_metadataWorkspace.GetMappedPrimitiveType(primitiveTypeKind, DataSpace.CSpace); 
 
            return (null != primitiveType);
        } 

        //
        // This property will be needed to construct keys for transient types
        // 
        /// 
        /// Returns the target dataspace for this perspective 
        ///  
        internal DataSpace TargetDataspace
        { 
            get
            {
                return m_targetDataspace;
            } 
        }
        #endregion 
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....],[....]
//--------------------------------------------------------------------- 
using System.Diagnostics; 

namespace System.Data.Metadata.Edm 
{
    using System.Collections.Generic;

    ///  
    /// Internal helper class for query
    ///  
    internal abstract class Perspective 
    {
        #region Constructors 
        /// 
        /// Creates a new instance of perspective class so that query can work
        /// ignorant of all spaces
        ///  
        /// runtime metadata container
        /// target dataspace for the perspective 
        internal Perspective(MetadataWorkspace metadataWorkspace, 
                             DataSpace targetDataspace)
        { 
            EntityUtil.CheckArgumentNull(metadataWorkspace, "metadataWorkspace");

            m_metadataWorkspace = metadataWorkspace;
            m_targetDataspace = targetDataspace; 
        }
        #endregion 
 
        #region Fields
        private MetadataWorkspace m_metadataWorkspace; 
        private DataSpace m_targetDataspace;
        #endregion

        #region Methods 

        ///  
        /// Given the type in the target space and the member name in the source space, 
        /// get the corresponding member in the target space
        /// For e.g.  consider a Conceptual Type 'Foo' with a member 'Bar' and a CLR type 
        /// 'XFoo' with a member 'YBar'. If one has a reference to Foo one can
        /// invoke GetMember(Foo,"YBar") to retrieve the member metadata for bar
        /// 
        /// The type in the target perspective 
        /// the name of the member in the source perspective
        /// Whether to do case-sensitive member look up or not 
        /// returns the member in target space, if a match is found 
        /// 
        internal virtual bool TryGetMember(StructuralType type, String memberName, bool ignoreCase, out EdmMember outMember) 
        {
            EntityUtil.CheckArgumentNull(type, "type");
            EntityUtil.CheckStringArgument(memberName, "memberName");
            outMember = null; 

            // If a normal member is not present, check for navigation property with that name 
            return type.Members.TryGetValue(memberName, ignoreCase, out outMember); 
        }
 
        /// 
        /// Returns the extent in the target space, for the given entity container
        /// 
        /// name of the entity container in target space 
        /// name of the extent
        /// Whether to do case-sensitive member look up or not 
        /// extent in target space, if a match is found 
        /// returns true, if a match is found otherwise returns false
        internal bool TryGetExtent(EntityContainer entityContainer, String extentName, bool ignoreCase, out EntitySetBase outSet) 
        {
            // There are no entity container and extents in the OSpace. So there is no mapping
            // involved. Hence the name should be a valid name in the CSpace.
            return entityContainer.BaseEntitySets.TryGetValue(extentName, ignoreCase, out outSet); 
        }
 
        ///  
        /// Get the default entity container
        /// returns null for any perspective other 
        /// than the CLR perspective
        /// 
        /// The default container
        internal virtual EntityContainer GetDefaultContainer() 
        {
            return null; 
        } 

        ///  
        /// Get an entity container based upon the strong name of the container
        /// If no entity container is found, returns null, else returns the first one/// 
        /// name of the entity container
        /// true for case-insensitive lookup 
        /// returns the entity container if a match is found
        /// returns true if a match is found, otherwise false 
        internal virtual bool TryGetEntityContainer(string name, bool ignoreCase, out EntityContainer entityContainer) 
        {
            return MetadataWorkspace.TryGetEntityContainer(name, ignoreCase, TargetDataspace, out entityContainer); 
        }

        /// 
        /// Gets the type with the given name in the target space 
        /// 
        /// full name of the type 
        /// true for case-insensitive lookup 
        /// TypeUsage for the type you are looking for
        /// returns true if a match is found, otherwise returns false 
        internal abstract bool TryGetTypeByName(string fullName, bool ignoreCase, out TypeUsage typeUsage);

        /// 
        /// Returns the list of all the function with the given name 
        /// 
        /// name of the function 
        /// namespace of the function 
        /// whether to do a case-insensitive lookup or not
        ///  
        internal System.Collections.ObjectModel.ReadOnlyCollection GetFunctions(
            string name, string namespaceName, bool ignoreCase)
        {
            EntityUtil.CheckStringArgument(name, "name"); 
            EntityUtil.CheckStringArgument(namespaceName, "namespaceName");
 
            string functionFullName = namespaceName + "." + name; 

            System.Collections.ObjectModel.ReadOnlyCollection functionOverloads; 

            // First lookup canonical functions
            EdmItemCollection edmItemCollection = (EdmItemCollection)m_metadataWorkspace.GetItemCollection(DataSpace.CSpace);
            functionOverloads = edmItemCollection.GetFunctions(functionFullName, ignoreCase); 
            if (null == functionOverloads || 0 == functionOverloads.Count)
            { 
                StoreItemCollection storeItemCollection = (StoreItemCollection)m_metadataWorkspace.GetItemCollection(DataSpace.SSpace); 
                return storeItemCollection.GetCTypeFunctions(functionFullName, ignoreCase);
            } 

            return functionOverloads;
        }
 
        /// 
        /// Return the metadata workspace 
        ///  
        internal MetadataWorkspace MetadataWorkspace
        { 
            get
            {
                return m_metadataWorkspace;
            } 
        }
 
        ///  
        /// returns the primitive type for a given primitive type kind.
        ///  
        /// 
        /// 
        /// 
        internal virtual bool TryGetMappedPrimitiveType(PrimitiveTypeKind primitiveTypeKind, out PrimitiveType primitiveType) 
        {
            primitiveType = m_metadataWorkspace.GetMappedPrimitiveType(primitiveTypeKind, DataSpace.CSpace); 
 
            return (null != primitiveType);
        } 

        //
        // This property will be needed to construct keys for transient types
        // 
        /// 
        /// Returns the target dataspace for this perspective 
        ///  
        internal DataSpace TargetDataspace
        { 
            get
            {
                return m_targetDataspace;
            } 
        }
        #endregion 
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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Perspective.cs source code in C# .NET

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