assets/samples/Samples/ExtensibleStorageManager/SchemaWrapperTools/CS/SchemaWrapper.cs

//
// (C) Copyright 2003-2019 by Autodesk, Inc. All rights reserved.
//
// Permission to use, copy, modify, and distribute this software in
// object code form for any purpose and without fee is hereby granted
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//
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// Use, duplication, or disclosure by the U.S. Government is subject to
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// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Autodesk.Revit.DB;
using Autodesk.Revit.UI;
using Autodesk.Revit.DB.ExtensibleStorage;
using System.Xml.Serialization;
using System.Runtime.Serialization;
using System.IO;
using System.Reflection;
using System.Diagnostics;

namespace SchemaWrapperTools
{
   /// <summary>
   /// This class provides a simpler level of access to the
   /// Autodesk.Revit.DB.ExtensibleStorage Schema and SchemaBuilder objects
   /// and also provides easy serialization of schema data to xml for the user.
   /// </summary>
   [Serializable]
   public class SchemaWrapper : IDisposable
   {
      #region Constructors and class Factories
      /// <summary>
      /// For serialization only -- Do not use.
      /// </summary>
      internal SchemaWrapper() { }

      /// <summary>
      /// Creates a new SchemaWrapper from an existing schema.  
      /// </summary>
      /// <param name="schema">A schema to create a wrapper from</param>
      /// <returns>A new SchemaWrapper containing all data in the schema</returns>
      public static SchemaWrapper FromSchema(Schema schema)
      {
          SchemaWrapper swReturn = new SchemaWrapper(schema);

          foreach (Field currentField in schema.ListFields())
          {
             //We need to add call AddField on the SchemaWrapper we are creating for each field in the source schema.
             //Since we do not know the data type of the field yet, we need to get the generic method first and
             //then query the field data types from the field and instantiate a new generic method with those types as parameters.
              
             //Get the "AddField" method.
             MethodInfo addFieldmethod = typeof(SchemaWrapper).GetMethod("AddField", new Type[] { typeof(string), typeof(ForgeTypeId), typeof(SchemaWrapper) });
              Type[] methodGenericParameters = null;
              
              //Get the generic type parameters.  The type will either be a single type, an IList<> of a single type, or an IDictionary<> of a key type and a value type.
              if (currentField.ContainerType == ContainerType.Simple)
                 methodGenericParameters = new Type[] { currentField.ValueType };
              else if (currentField.ContainerType == ContainerType.Array)
                 methodGenericParameters = new Type[] { typeof(IList<int>).GetGenericTypeDefinition().MakeGenericType(new Type[] { currentField.ValueType }) };
              else
                 methodGenericParameters = new Type[] { typeof(Dictionary<int, int>).GetGenericTypeDefinition().MakeGenericType(new Type[] { currentField.KeyType, currentField.ValueType }) };
              
              //Instantiate a new generic method from the "AddField" method we got before with the generic parameters we got
              //from the current field we are querying.
              MethodInfo genericAddFieldMethodInstantiated = addFieldmethod.MakeGenericMethod(methodGenericParameters);
              SchemaWrapper swSub = null;  //Our subSchema is null by default unless the field is of type "Entity," in which case
              //we will call "FromSchema" again on the field's subSchema.
              if (currentField.ValueType == typeof(Entity))
              {
                 Schema subSchema = Schema.Lookup(currentField.SubSchemaGUID);
                  swSub = SchemaWrapper.FromSchema(subSchema);  
              }
              //Invoke the "AddField" method with the generic parameters from the current field.
              genericAddFieldMethodInstantiated.Invoke(swReturn, new object[] { currentField.FieldName, currentField.GetSpecTypeId(), swSub });  
          }
          //Note that we don't call SchemaWrapper.FinishSchema here. 
          //The Autodesk.Revit.DB.ExtensibleStorage.Schema object already exists and is registered -- we're just populating the outer wrapper.
          return swReturn;
      }
      

      /// <summary>
      /// Creates a new SchemaWrapper from a Guid
      /// </summary>
      /// <param name="schemaId">The schemaId guid</param>
      /// <returns>A new SchemaWrapper</returns>
      public static SchemaWrapper NewSchema(Guid schemaId, AccessLevel readAccess, AccessLevel writeAccess, string vendorId, string applicationId, string name, string description)
      {
         return new SchemaWrapper(schemaId, readAccess, writeAccess, vendorId, applicationId, name, description);
      }

      /// <summary>
      /// Creates a new SchemaWrapper from an XML file on disk
      /// </summary>
      /// <param name="xmlDataPath">The path to the XML file containing a schema definition</param>
      /// <returns>A new SchemaWrapper</returns>
      public static SchemaWrapper FromXml(string xmlDataPath)
      {
         XmlSerializer sampleSchemaInXml = new XmlSerializer(typeof(SchemaWrapper));
         Stream streamXmlIn = new FileStream(xmlDataPath, FileMode.Open, FileAccess.Read, FileShare.Read);
         SchemaWrapper wrapperIn = null;
         try
         {
            wrapperIn = sampleSchemaInXml.Deserialize(streamXmlIn) as SchemaWrapper;
         }
         catch (Exception ex)
         {
            Debug.WriteLine("Could not deserialize schema file." + ex.ToString());
            return null;
         }
         wrapperIn.SetRevitAssembly();
         streamXmlIn.Close();
         try
         {
            wrapperIn.FinishSchema();
         }
         catch (Exception ex)
         {
            Debug.WriteLine("Could not create schema." + ex.ToString());
            return null;
         }
         return wrapperIn;
      }

      /// <summary>
      /// Constructor used by class factories
      /// </summary>
      private SchemaWrapper(Guid schemaId, AccessLevel readAccess, AccessLevel writeAccess, string vendorId, string applicationId, string schemaName, string schemaDescription)
      {
            m_SchemaDataWrapper = new SchemaDataWrapper(schemaId, readAccess, writeAccess, vendorId, applicationId, schemaName, schemaDescription);
            SetRevitAssembly();
      }

      private SchemaWrapper(Schema schema) : this(schema.GUID, schema.ReadAccessLevel, schema.WriteAccessLevel, schema.VendorId, schema.ApplicationGUID.ToString(), schema.SchemaName, schema.Documentation)
      {
         this.SetSchema(schema);
      }

      #endregion

      #region IDisposable implementation

      public void Dispose()
      {
         // Do not change this code. Put cleanup code in 'Dispose(bool disposing)' method
         Dispose(true);
         GC.SuppressFinalize(this);
      }

      protected virtual void Dispose(bool disposing)
      {
         if (!disposing || isDisposed)
            return;

         (m_Schema as IDisposable)?.Dispose();
         (m_SchemaBuilder as IDisposable)?.Dispose();

         isDisposed = true;
      }

      #endregion

      #region Active schema manipulation

      /// <summary>
      /// Adds a new field to the SchemaWrapper
      /// </summary>
      /// <typeparam name="TypeName">Currently supported types:  int, short, float, double, bool, string, ElementId, XYZ, UV, Guid, Entity, IDictionary<>, IList<>.  IDictionary<> does not support floating point types, XYZ, UV, or Entity as Key parameters.</typeparam>
      /// <param name="name">The name of the field</param>
      /// <param name="spec">The unit type of the field.  Defintion required for floating point, XYZ, and UV types</param>
      /// <param name="subSchema">A subSchemaWrapper, if the field is of type Entity</param>
       public void AddField<TypeName>(string name, ForgeTypeId spec, SchemaWrapper subSchema)
       {
           m_SchemaDataWrapper.AddData(name, typeof(TypeName), spec, subSchema);
       }

      /// <summary>
      /// Create a new Autodesk.Revit.DB.ExtensibleStorage.SchemaBuilder and Schema from
      /// the data in the SchemaWrapper.
      /// </summary>
      public void FinishSchema()
      {

         //Create the Autodesk.Revit.DB.ExtensibleStorage.SchemaBuilder that actually builds the schema
         m_SchemaBuilder = new SchemaBuilder(new Guid(m_SchemaDataWrapper.SchemaId));
         

         //We will add a new field to our schema from each FieldData object in our SchemaWrapper
         foreach (FieldData currentFieldData in m_SchemaDataWrapper.DataList)
         {

            //If the current field's type is a supported system type (int, string, etc...),
            //we can instantiate it with Type.GetType().  If the current field's type is a supported Revit API type
            //(XYZ, elementID, etc...), we need to call GetType from the RevitAPI.dll assembly object.
            Type fieldType = null;
            try
            {
               fieldType = Type.GetType(currentFieldData.Type, true, true);
            }
               
            catch (Exception ex)  //Get the type from the Revit API assembly if it is not a system type.
            {
               Debug.WriteLine(ex.ToString());
               try
               {
                  //Get the field from the Revit API assembly.
                  fieldType = m_Assembly.GetType(currentFieldData.Type);
               }

               catch (Exception exx)
               {
                  Debug.WriteLine("Error getting type: " + exx.ToString());
                  throw;
               }
              
            }

        
            //Now that we have the data type of field we need to add, we need to call either
            //SchemaBuilder.AddSimpleField, AddArrayField, or AddMapField.
            
            FieldBuilder currentFieldBuilder = null;
            Guid subSchemaId = Guid.Empty;
            Type[] genericParams = null;
            
            
            if (currentFieldData.SubSchema != null)
               subSchemaId = new Guid(currentFieldData.SubSchema.Data.SchemaId);
            
            //If our data type is a generic, it is an IList<> or an IDictionary<>, so it's an array or map type
            if (fieldType.IsGenericType)
            {
                Type tGeneric = fieldType.GetGenericTypeDefinition();  //tGeneric will be either an IList<> or an IDictionary<>.

                //Create an IList<> or an IDictionary<> to compare against tGeneric.
                Type iDictionaryType = typeof(IDictionary<int, int>).GetGenericTypeDefinition();
                Type iListType = typeof(IList<int>).GetGenericTypeDefinition();
                
                genericParams = fieldType.GetGenericArguments();  //Get the actual data type(s) stored in the field's IList<> or IDictionary<>
                if (tGeneric == iDictionaryType)
                   //Pass the key and value type of our dictionary type to AddMapField.
                   currentFieldBuilder = m_SchemaBuilder.AddMapField(currentFieldData.Name, genericParams[0], genericParams[1]);
                else if (tGeneric == iListType)
                   //Pass the value type of our list type to AddArrayField.
                   currentFieldBuilder = m_SchemaBuilder.AddArrayField(currentFieldData.Name, genericParams[0]);
                else
                   throw new Exception("Generic type is neither IList<> nor IDictionary<>, cannot process.");
            }
            else
               //The simpler case -- just add field using a name and a System.Type.
               currentFieldBuilder = m_SchemaBuilder.AddSimpleField(currentFieldData.Name, fieldType);

            if (  //if we're dealing with an Entity as a simple field, map field, or list field and need to do recursion...
                (fieldType == (typeof(Entity)))
                ||
               (fieldType.IsGenericType && ((genericParams[0] == (typeof(Entity))) || ((genericParams.Length > 1) && (genericParams[1] == typeof(Entity)))))
                )
            {
                currentFieldBuilder.SetSubSchemaGUID(subSchemaId);  //Set the SubSchemaID if our field
                currentFieldData.SubSchema.FinishSchema();  //Recursively create the schema for the subSchema.
            }

            if (!string.IsNullOrEmpty(currentFieldData.Spec))
               currentFieldBuilder.SetSpec(new ForgeTypeId(currentFieldData.Spec));
         }

         //Set all the top level data in the schema we are generating.
         m_SchemaBuilder.SetReadAccessLevel(this.Data.ReadAccess);
         m_SchemaBuilder.SetWriteAccessLevel(this.Data.WriteAccess);
         m_SchemaBuilder.SetVendorId(this.Data.VendorId);
         m_SchemaBuilder.SetApplicationGUID(new Guid(this.Data.ApplicationId));
         m_SchemaBuilder.SetDocumentation(this.Data.Documentation);
         m_SchemaBuilder.SetSchemaName(this.Data.Name);


         //Actually finish creating the Autodesk.Revit.DB.ExtensibleStorage.Schema.
         m_Schema = m_SchemaBuilder.Finish();
      }

      /// <summary>
      /// Serializes a SchemaWrapper to an Xml file.
      /// </summary>
      /// <param name="xmlDataPath">The path to save schema data</param>
      public void ToXml(string xmlDataPath)
      {
   
         XmlSerializer sampleSchemaOutXml = new XmlSerializer(typeof(SchemaWrapper));
         Stream streamXmlOut = new FileStream(xmlDataPath, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite);
         sampleSchemaOutXml.Serialize(streamXmlOut, this);
         streamXmlOut.Close();
         return;
      }

      public override string ToString()
      {
          StringBuilder strBuilder = new StringBuilder();
          strBuilder.AppendLine("--Start Schema--  " + " Name: " + this.Data.Name + ", Description: " + this.Data.Documentation + ", Id: " + this.Data.SchemaId + ", ReadAccess: " + this.Data.ReadAccess.ToString() + ", WriteAccess: " + this.Data.WriteAccess.ToString());
          foreach (FieldData fd in this.Data.DataList)
          {
              strBuilder.AppendLine(fd.ToString());
          }
          strBuilder.AppendLine("--End Schema--");
          return strBuilder.ToString();
      }

      #endregion

      #region Helper Methods

      /// <summary>
      /// Returns a string representation of all data in an Entity
      /// </summary>
      /// <param name="entity">The entity to query</param>
      /// <returns>All entity data as a string</returns>
      public string GetSchemaEntityData(Entity entity)
      {
         StringBuilder swBuilder = new StringBuilder();
         DumpAllSchemaEntityData<Entity>(entity, entity.Schema, swBuilder);
         return swBuilder.ToString();
      }

      /// <summary>
      /// Recursively gets all data from an Entity and appends it in string format to a StringBuilder.
      /// </summary>
      /// <typeparam name="EntityType">A type parameter that will always be set to type "Entity" -- used to get around some type reflection limitations in .NET</typeparam>
      /// <param name="storageEntity">The entity to query</param>
      /// <param name="schema">The schema of the Entity</param>
      /// <param name="strBuilder">The StringBuilder to append entity data to</param>
      private void DumpAllSchemaEntityData<EntityType>(EntityType storageEntity,  Schema schema, StringBuilder strBuilder)
      {
          strBuilder.AppendLine("Schema/Entity Name: " + "" + ", Description: " +  schema.Documentation + ", Id: " + schema.GUID.ToString() + ", Read Access: " + schema.ReadAccessLevel.ToString() + ", Write Access: " + schema.WriteAccessLevel.ToString());
          foreach (Field currentField in schema.ListFields())
          {

             //Here, we call GetFieldDataAsString on this class, the SchemaWrapper class.  However, we must
             //call it with specific generic parameters that are only known at runtime, so we must use reflection to 
             //dynamically create a method with parameters from the current field we want to extract data from


             ParameterModifier[] pmodifiers = new ParameterModifier[0]; //a Dummy parameter needed for GetMethod() call, empty

             //Get the method.
             MethodInfo getFieldDataAsStringMethod = typeof(SchemaWrapper).GetMethod("GetFieldDataAsString", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.InvokeMethod, System.Type.DefaultBinder, new Type[] { typeof(Field), typeof(Entity), typeof(StringBuilder) }, pmodifiers);
             
             //Determine if our field type is a simple field, an array field, or a map field.  Then, create an array
             //of type parameters corresponding to the key and value types of the field.

             //Note that GetFieldDatAsString takes two generic parameters, a key type and field(value) type.
             //The 'key' type is only used for dictionary/map types, so pass an int type as a placeholder when
             //processing simple and array fields.
             Type[] methodGenericParameters = null;
             if (currentField.ContainerType == ContainerType.Simple)
                 methodGenericParameters = new Type[] { typeof(int), currentField.ValueType };   //dummy int types for non dictionary type
             else if (currentField.ContainerType == ContainerType.Array)
                 methodGenericParameters = new Type[] { typeof(int), currentField.ValueType };  //dummy int types for non dictionary type
              else
                 methodGenericParameters = new Type[] { currentField.KeyType, currentField.ValueType };

             //Instantiate a generic version of "GetFieldDataAsString" with the type parameters we just got from our field.
             MethodInfo genericGetFieldDataAsStringmethodInstantiated = getFieldDataAsStringMethod.MakeGenericMethod(methodGenericParameters);
             //Call that method to get the data out of that field.
             genericGetFieldDataAsStringmethodInstantiated.Invoke(this, new object[] { currentField, storageEntity, strBuilder });
        
          }
          strBuilder.AppendLine("---------------------------------------------------------");


      }

     /// <summary>
     /// Recursively gets all data from a field and appends it in string format to a StringBuilder.
     /// </summary>
     /// <typeparam name="KeyType">The key type of the field -- used only for maps</typeparam>
     /// <typeparam name="FieldType">The data type of the field for simple types and arrays</typeparam>
     /// <param name="field">The field to query</param>
     /// <param name="entity">The entity to query</param>
     /// <param name="strBuilder">The StringBuilder to append entity data to</param>
      private void GetFieldDataAsString<KeyType, FieldType>(Field field, Entity entity, StringBuilder strBuilder)
      {
          string fieldName = field.FieldName;
          System.Type fieldType = field.ValueType;
          ForgeTypeId fieldUnit = field.GetSpecTypeId();
          ContainerType fieldContainerType = field.ContainerType;
          Type[] methodGenericParameters = null;
          object[] invokeParams = null;
          Type[] methodOverloadSelectionParams = null;
          if (field.ContainerType == ContainerType.Simple)
              methodGenericParameters = new Type[] { field.ValueType };
          else if (field.ContainerType == ContainerType.Array)
              methodGenericParameters = new Type[] { typeof(IList<int>).GetGenericTypeDefinition().MakeGenericType(new Type[] { field.ValueType }) };
          else //map
              methodGenericParameters = new Type[] { typeof(IDictionary<int, int>).GetGenericTypeDefinition().MakeGenericType(new Type[] { field.KeyType, field.ValueType }) };

          if (fieldUnit.Empty())
          {
              methodOverloadSelectionParams = new Type[] { typeof(Field) };
              invokeParams = new object[] { field };
          }
          else
          {
              methodOverloadSelectionParams = new Type[] { typeof(Field), typeof(ForgeTypeId) };
              invokeParams = new object[] { field, UnitTypeId.Meters };
          }

          MethodInfo instantiatedGenericGetMethod = entity.GetType().GetMethod("Get", methodOverloadSelectionParams).MakeGenericMethod(methodGenericParameters);
          if (field.ContainerType == ContainerType.Simple)
          {
              FieldType retval = (FieldType) instantiatedGenericGetMethod.Invoke(entity, invokeParams);
              if (fieldType == typeof(Entity))
              {
                  Schema subSchema = Schema.Lookup(field.SubSchemaGUID);
                  strBuilder.AppendLine("Field: " + field.FieldName + ", Type: " + field.ValueType.ToString() + ", Value: " + " {SubEntity} " + ", Unit: " + field.GetSpecTypeId().TypeId + ", ContainerType: " + field.ContainerType.ToString());
                  DumpAllSchemaEntityData<FieldType>(retval, subSchema, strBuilder);
              }
              else
              {
                  string sRetval = retval.ToString();
                  strBuilder.AppendLine("Field: " + field.FieldName + ", Type: " + field.ValueType.ToString() + ", Value: " + retval + ", Unit: " + field.GetSpecTypeId().TypeId + ", ContainerType: " + field.ContainerType.ToString());
              }
          }
          else if (field.ContainerType == ContainerType.Array)
          {
              IList<FieldType> listRetval = (IList<FieldType>)instantiatedGenericGetMethod.Invoke(entity, invokeParams);
              if (fieldType == (typeof(Entity)))
              {
                  strBuilder.AppendLine("Field: " + field.FieldName + ", Type: " + field.ValueType.ToString() + ", Value: " + " {SubEntity} " + ", Unit: " + field.GetSpecTypeId().TypeId + ", ContainerType: " + field.ContainerType.ToString());

                  foreach (FieldType fa in listRetval)
                  {
                      strBuilder.Append("  Array Value: ");
                      DumpAllSchemaEntityData<FieldType>(fa, Schema.Lookup(field.SubSchemaGUID), strBuilder);
                  }
              }
              else
              {
                  strBuilder.AppendLine("Field: " + field.FieldName + ", Type: " + field.ValueType.ToString() + ", Value: " + " {Array} " + ", Unit: " + field.GetSpecTypeId().TypeId + ", ContainerType: " + field.ContainerType.ToString());
                  foreach (FieldType fa in listRetval)
                  {
                      strBuilder.AppendLine("  Array value: " + fa.ToString());
                  }
              }
          }
          else //Map
          {
              strBuilder.AppendLine("Field: " + field.FieldName + ", Type: " + field.ValueType.ToString() + ", Value: " + " {Map} " + ", Unit: " + field.GetSpecTypeId().TypeId + ", ContainerType: " + field.ContainerType.ToString());
              IDictionary<KeyType, FieldType> mapRetval = (IDictionary<KeyType, FieldType>)instantiatedGenericGetMethod.Invoke(entity, invokeParams);
              if (fieldType == (typeof(Entity)))
              {
                  strBuilder.AppendLine("Field: " + field.FieldName + ", Type: " + field.ValueType.ToString() + ", Value: " + " {SubEntity} " + ", Unit: " + field.GetSpecTypeId().TypeId + ", ContainerType: " + field.ContainerType.ToString());
                  foreach (FieldType fa in mapRetval.Values)
                  {
                      strBuilder.Append("  Map Value: ");
                      DumpAllSchemaEntityData<FieldType>(fa, Schema.Lookup(field.SubSchemaGUID), strBuilder);
                  }
              }
              else
              {
                  strBuilder.AppendLine("Field: " + field.FieldName + ", Type: " + field.ValueType.ToString() + ", Value: " + " {Map} " + ", Unit: " + field.GetSpecTypeId().TypeId + ", ContainerType: " + field.ContainerType.ToString());
                  foreach (FieldType fa in mapRetval.Values)
                  {
                      strBuilder.AppendLine("  Map value: " + fa.ToString());
                  }
              }
          }

      }

      /// <summary>
      /// Creates an instance of the RevitAPI.DLL assembly so we can query type information
      /// from it
      /// </summary>
      private void SetRevitAssembly()
      {
         m_Assembly = System.Reflection.Assembly.GetAssembly(typeof(XYZ));
      }

      #endregion

      #region Properties

      /// <summary>
      /// Gets the Autodesk.Revit.DB.ExtensibleStorage schema that the wrapper owns.
      /// </summary>
      /// <returns>An Autodesk.Revit.DB.ExtensibleStorage.Schema</returns>
      public Schema GetSchema() { return m_Schema; }

      /// <summary>
      /// Sets the Autodesk.Revit.DB.ExtensibleStorage schema that the wrapper owns.
      /// </summary>
      /// <param name="schema">An Autodesk.Revit.DB.ExtensibleStorage.Schema</param>
      public void SetSchema(Schema schema) { m_Schema = schema; }


      /// <summary>
      /// Gets and set the SchemaDataWrapper of the SchemaWrapper.  "Set" is for serialization use only.
      /// </summary>
      public SchemaDataWrapper Data
      {
          get { return m_SchemaDataWrapper; }
          set { m_SchemaDataWrapper = value; }
      }

      /// <summary>
      /// Get the path of the xml file this Schema was generated from
      /// </summary>
      public string GetXmlPath()
      {
         return m_xmlPath;
      }

      /// <summary>
      /// Set the path of the xml file this Schema was generated from
      /// </summary>
      public void SetXmlPath(string path)
      {
         m_xmlPath = path;
      }
 
      #endregion

      #region Data
      private SchemaDataWrapper m_SchemaDataWrapper;
  
      [NonSerialized]
      private Schema m_Schema;

      [NonSerialized]
      private SchemaBuilder m_SchemaBuilder;

      [NonSerialized]
      private System.Reflection.Assembly m_Assembly;

      [NonSerialized]
      private string m_xmlPath;

      [NonSerialized]
      private bool isDisposed;
      #endregion

   }
}