//------------------------------------------------------------------------------
// <copyright file="CodeNamespace.cs" company="Microsoft">
// 
// <OWNER>Microsoft</OWNER>
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// </copyright>                                                                
//------------------------------------------------------------------------------

namespace System.CodeDom {

    using System.Diagnostics;
    using System;
    using Microsoft.Win32;
    using System.Collections;
    using System.Runtime.Serialization;
    using System.Runtime.InteropServices;

    /// <devdoc>
    ///    <para>
    ///       Represents a
    ///       namespace declaration.
    ///    </para>
    /// </devdoc>
    [
        ClassInterface(ClassInterfaceType.AutoDispatch),
        ComVisible(true),
        Serializable,
    ]
    public class CodeNamespace: CodeObject {
        private string name;
        private CodeNamespaceImportCollection imports = new CodeNamespaceImportCollection();
        private CodeCommentStatementCollection comments = new CodeCommentStatementCollection();
        private CodeTypeDeclarationCollection classes = new CodeTypeDeclarationCollection();
#if CODEDOM_NESTED_NAMESPACES
        private CodeNamespaceCollection namespaces = new CodeNamespaceCollection();
#endif
        
        private int  populated = 0x0;
        private const int ImportsCollection = 0x1;
        private const int CommentsCollection = 0x2;
        private const int TypesCollection = 0x4;
        
#if CODEDOM_NESTED_NAMESPACES
        private const int NamespacesCollection = 0x8;
#endif
        
        
       
        /// <devdoc>
        ///    <para>
        ///       An event that will be fired the first time the Comments Collection is accessed.  
        ///    </para>
        /// </devdoc>
        public event EventHandler PopulateComments;
        
         /// <devdoc>
        ///    <para>
        ///       An event that will be fired the first time the Imports Collection is accessed.  
        ///    </para>
        /// </devdoc>
        public event EventHandler PopulateImports;

#if CODEDOM_NESTED_NAMESPACES
         /// <devdoc>
        ///    <para>
        ///       An event that will be fired the first time the Namespaces Collection is accessed.  
        ///    </para>
        /// </devdoc>
        public event EventHandler PopulateNamespaces;
#endif
        
        
        /// <devdoc>
        ///    <para>
        ///       An event that will be fired the first time the Types Collection is accessed.  
        ///    </para>
        /// </devdoc>
        public event EventHandler PopulateTypes;

        /// <devdoc>
        ///    <para>
        ///       Initializes a new instance of <see cref='System.CodeDom.CodeNamespace'/>.
        ///    </para>
        /// </devdoc>
        public CodeNamespace() {
        }

        /// <devdoc>
        ///    <para>
        ///       Initializes a new instance of <see cref='System.CodeDom.CodeNamespace'/> using the specified name.
        ///    </para>
        /// </devdoc>
        public CodeNamespace(string name) {
            Name = name;
        }

        private CodeNamespace(SerializationInfo info, StreamingContext context) {
        }

        /// <devdoc>
        ///    <para>
        ///       Gets or sets the collection of classes.
        ///    </para>
        /// </devdoc>
        public CodeTypeDeclarationCollection Types {
            get {
                if (0 == (populated & TypesCollection)) {
                    populated |= TypesCollection;
                    if (PopulateTypes != null) PopulateTypes(this, EventArgs.Empty);
                }
                return classes;
            }
        }

        /// <devdoc>
        ///    <para>
        ///       Gets or sets the collection of namespace imports used by the represented
        ///       namespace.
        ///    </para>
        /// </devdoc>
        public CodeNamespaceImportCollection Imports {
            get {
                if (0 == (populated & ImportsCollection)) {
                    populated |= ImportsCollection;
                    if (PopulateImports != null) PopulateImports(this, EventArgs.Empty);
                }
                return imports;
            }
        }

        /// <devdoc>
        ///    <para>
        ///       Gets or sets the name of the namespace.
        ///    </para>
        /// </devdoc>
        public string Name {
            get {
                return (name == null) ? string.Empty : name;
            }
            set {
                name = value;
            }
        }
        
        
#if CODEDOM_NESTED_NAMESPACES
        
        /// <devdoc>
        ///    <para>
        ///       Gets or sets the collection of Namespaces.
        ///    </para>
        /// </devdoc>
        public CodeNamespaceCollection Namespaces {
            get {
                if (0 == (populated & NamespacesCollection)) {
                    populated |= NamespacesCollection;
                    if (PopulateNamespaces != null) PopulateNamespaces(this, EventArgs.Empty);
                }
                return namespaces;
            }
        }

#endif

        /// <devdoc>
        ///    <para>
        ///       Gets or sets the member comment collection members.
        ///    </para>
        /// </devdoc>
        public CodeCommentStatementCollection Comments {
            get {
                if (0 == (populated & CommentsCollection)) {
                    populated |= CommentsCollection;
                    if (PopulateComments != null) PopulateComments(this, EventArgs.Empty);
                }
                return comments;
            }
        }
    }
}