private TypeUsage DetermineStoreResultType(
FunctionImportMappingNonComposable mapping,
int resultSetIndex,
out EntityCommandDefinition.IColumnMapGenerator columnMapGenerator)
{
EdmFunction functionImport = mapping.FunctionImport;
StructuralType returnType;
TypeUsage type;
if (MetadataHelper.TryGetFunctionImportReturnType <StructuralType>(functionImport, resultSetIndex, out returnType))
{
EntityCommandDefinition.ValidateEdmResultType((EdmType)returnType, functionImport);
EntitySet entitySet = functionImport.EntitySets.Count > resultSetIndex ? functionImport.EntitySets[resultSetIndex] : (EntitySet)null;
columnMapGenerator = (EntityCommandDefinition.IColumnMapGenerator) new EntityCommandDefinition.FunctionColumnMapGenerator(mapping, resultSetIndex, entitySet, returnType, this._columnMapFactory);
type = mapping.GetExpectedTargetResultType(resultSetIndex);
}
else
{
FunctionParameter returnParameter = MetadataHelper.GetReturnParameter(functionImport, resultSetIndex);
if (returnParameter != null && returnParameter.TypeUsage != null)
{
type = returnParameter.TypeUsage;
ScalarColumnMap scalarColumnMap = new ScalarColumnMap(((CollectionType)type.EdmType).TypeUsage, string.Empty, 0, 0);
SimpleCollectionColumnMap collectionColumnMap = new SimpleCollectionColumnMap(type, string.Empty, (ColumnMap)scalarColumnMap, (SimpleColumnMap[])null, (SimpleColumnMap[])null);
columnMapGenerator = (EntityCommandDefinition.IColumnMapGenerator) new EntityCommandDefinition.ConstantColumnMapGenerator((ColumnMap)collectionColumnMap, 1);
}
else
{
type = (TypeUsage)null;
columnMapGenerator = (EntityCommandDefinition.IColumnMapGenerator) new EntityCommandDefinition.ConstantColumnMapGenerator((ColumnMap)null, 0);
}
}
return(type);
}
private DbCommand PrepareEntityCommandBeforeExecution(EntityCommand entityCommand)
{
if (1 != this._mappedCommandDefinitions.Count)
{
throw new NotSupportedException("MARS");
}
EntityTransaction entityTransaction = entityCommand.ValidateAndGetEntityTransaction();
InterceptableDbCommand interceptableDbCommand = new InterceptableDbCommand(this._mappedCommandDefinitions[0].CreateCommand(), entityCommand.InterceptionContext, (DbDispatchers)null);
CommandHelper.SetStoreProviderCommandState(entityCommand, entityTransaction, (DbCommand)interceptableDbCommand);
bool flag = false;
if (interceptableDbCommand.Parameters != null)
{
foreach (DbParameter parameter in interceptableDbCommand.Parameters)
{
int index = entityCommand.Parameters.IndexOf(parameter.ParameterName);
if (-1 != index)
{
EntityCommandDefinition.SyncParameterProperties(entityCommand.Parameters[index], parameter, this._storeProviderServices);
if (parameter.Direction != ParameterDirection.Input)
{
flag = true;
}
}
}
}
if (flag)
{
entityCommand.SetStoreProviderCommand((DbCommand)interceptableDbCommand);
}
return((DbCommand)interceptableDbCommand);
}
private static EntityParameter CreateEntityParameterFromQueryParameter(
KeyValuePair <string, TypeUsage> queryParameter)
{
EntityParameter parameter = new EntityParameter();
parameter.ParameterName = queryParameter.Key;
EntityCommandDefinition.PopulateParameterFromTypeUsage(parameter, queryParameter.Value, false);
return(parameter);
}
internal EntityCommandDefinition(
DbProviderFactory storeProviderFactory,
DbCommandTree commandTree,
DbInterceptionContext interceptionContext,
IDbDependencyResolver resolver = null,
BridgeDataReaderFactory bridgeDataReaderFactory = null,
ColumnMapFactory columnMapFactory = null)
{
this._bridgeDataReaderFactory = bridgeDataReaderFactory ?? new BridgeDataReaderFactory((Translator)null);
this._columnMapFactory = columnMapFactory ?? new ColumnMapFactory();
this._storeProviderServices = (resolver != null ? resolver.GetService <DbProviderServices>((object)storeProviderFactory.GetProviderInvariantName()) : (DbProviderServices)null) ?? storeProviderFactory.GetProviderServices();
try
{
if (commandTree.CommandTreeKind == DbCommandTreeKind.Query)
{
List <ProviderCommandInfo> providerCommands = new List <ProviderCommandInfo>();
ColumnMap resultColumnMap;
int columnCount;
System.Data.Entity.Core.Query.PlanCompiler.PlanCompiler.Compile(commandTree, out providerCommands, out resultColumnMap, out columnCount, out this._entitySets);
this._columnMapGenerators = new EntityCommandDefinition.IColumnMapGenerator[1]
{
(EntityCommandDefinition.IColumnMapGenerator) new EntityCommandDefinition.ConstantColumnMapGenerator(resultColumnMap, columnCount)
};
this._mappedCommandDefinitions = new List <DbCommandDefinition>(providerCommands.Count);
foreach (ProviderCommandInfo providerCommandInfo in providerCommands)
{
DbCommandDefinition commandDefinition = this._storeProviderServices.CreateCommandDefinition(providerCommandInfo.CommandTree, interceptionContext);
if (commandDefinition == null)
{
throw new ProviderIncompatibleException(Strings.ProviderReturnedNullForCreateCommandDefinition);
}
this._mappedCommandDefinitions.Add(commandDefinition);
}
}
else
{
DbFunctionCommandTree functionCommandTree = (DbFunctionCommandTree)commandTree;
FunctionImportMappingNonComposable targetFunctionMapping = EntityCommandDefinition.GetTargetFunctionMapping(functionCommandTree);
IList <FunctionParameter> returnParameters = (IList <FunctionParameter>)functionCommandTree.EdmFunction.ReturnParameters;
int length = returnParameters.Count > 1 ? returnParameters.Count : 1;
this._columnMapGenerators = new EntityCommandDefinition.IColumnMapGenerator[length];
TypeUsage storeResultType = this.DetermineStoreResultType(targetFunctionMapping, 0, out this._columnMapGenerators[0]);
for (int resultSetIndex = 1; resultSetIndex < length; ++resultSetIndex)
{
this.DetermineStoreResultType(targetFunctionMapping, resultSetIndex, out this._columnMapGenerators[resultSetIndex]);
}
List <KeyValuePair <string, TypeUsage> > keyValuePairList = new List <KeyValuePair <string, TypeUsage> >();
foreach (KeyValuePair <string, TypeUsage> parameter in functionCommandTree.Parameters)
{
keyValuePairList.Add(parameter);
}
this._mappedCommandDefinitions = new List <DbCommandDefinition>(1)
{
this._storeProviderServices.CreateCommandDefinition((DbCommandTree) new DbFunctionCommandTree(functionCommandTree.MetadataWorkspace, DataSpace.SSpace, targetFunctionMapping.TargetFunction, storeResultType, (IEnumerable <KeyValuePair <string, TypeUsage> >)keyValuePairList))
};
if (targetFunctionMapping.FunctionImport.EntitySets.FirstOrDefault <EntitySet>() != null)
{
this._entitySets = new Set <EntitySet>();
this._entitySets.Add(targetFunctionMapping.FunctionImport.EntitySets.FirstOrDefault <EntitySet>());
this._entitySets.MakeReadOnly();
}
}
List <EntityParameter> entityParameterList = new List <EntityParameter>();
foreach (KeyValuePair <string, TypeUsage> parameter in commandTree.Parameters)
{
EntityParameter fromQueryParameter = EntityCommandDefinition.CreateEntityParameterFromQueryParameter(parameter);
entityParameterList.Add(fromQueryParameter);
}
this._parameters = new ReadOnlyCollection <EntityParameter>((IList <EntityParameter>)entityParameterList);
}
catch (EntityCommandCompilationException ex)
{
throw;
}
catch (Exception ex)
{
if (ex.IsCatchableExceptionType())
{
throw new EntityCommandCompilationException(Strings.EntityClient_CommandDefinitionPreparationFailed, ex);
}
throw;
}
}
// <summary>
// Gets an entitycommanddefinition from cache if a match is found for the given cache key.
// </summary>
// <param name="entityCommandDefinition"> out param. returns the entitycommanddefinition for a given cache key </param>
// <returns> true if a match is found in cache, false otherwise </returns>
private bool TryGetEntityCommandDefinitionFromQueryCache(out EntityCommandDefinition entityCommandDefinition)
{
Debug.Assert(null != _connection, "Connection must not be null at this point");
entityCommandDefinition = null;
// if EnableQueryCaching is false, then just return to force the CommandDefinition to be created
if (!_enableQueryPlanCaching
|| string.IsNullOrEmpty(_esqlCommandText))
{
return false;
}
// Create cache key
var queryCacheKey = new EntityClientCacheKey(this);
// Try cache lookup
var queryCacheManager = _connection.GetMetadataWorkspace().GetQueryCacheManager();
Debug.Assert(null != queryCacheManager, "QuerycacheManager instance cannot be null");
if (!queryCacheManager.TryCacheLookup(queryCacheKey, out entityCommandDefinition))
{
// if not, construct the command definition using no special options;
entityCommandDefinition = CreateCommandDefinition();
// add to the cache
QueryCacheEntry outQueryCacheEntry = null;
if (queryCacheManager.TryLookupAndAdd(new QueryCacheEntry(queryCacheKey, entityCommandDefinition), out outQueryCacheEntry))
{
entityCommandDefinition = (EntityCommandDefinition)outQueryCacheEntry.GetTarget();
}
}
Debug.Assert(null != entityCommandDefinition, "out entityCommandDefinition must not be null");
return true;
}
// <summary>
// Get the command definition for the command; will construct one if there is not already
// one constructed, which means it will prepare the command on the client.
// </summary>
// <returns> the command definition </returns>
internal virtual EntityCommandDefinition GetCommandDefinition()
{
var entityCommandDefinition = _commandDefinition;
// Construct the command definition using no special options;
if (null == entityCommandDefinition)
{
// check if the _commandDefinition is in cache
if (!TryGetEntityCommandDefinitionFromQueryCache(out entityCommandDefinition))
{
// if not, construct the command definition using no special options;
entityCommandDefinition = CreateCommandDefinition();
}
_commandDefinition = entityCommandDefinition;
}
return entityCommandDefinition;
}
// <summary>
// Creates a prepared version of this command without regard to the current connection state.
// Called by both <see cref="Prepare" /> and <see cref="ToTraceString" />.
// </summary>
private void InnerPrepare()
{
// Unprepare if the parameters have changed to force a reprepare
if (_parameters.IsDirty)
{
Unprepare();
}
_commandDefinition = GetCommandDefinition();
Debug.Assert(null != _commandDefinition, "_commandDefinition cannot be null");
}
// <summary>
// Clear out any "compile" state
// </summary>
internal virtual void Unprepare()
{
_commandDefinition = null;
_preparedCommandTree = null;
// Clear the dirty flag on the parameters and parameter collection
_parameters.ResetIsDirty();
}
// <summary>
// Constructs a new EntityCommand given a EntityConnection and an EntityCommandDefition. This
// constructor is used by ObjectQueryExecution plan to execute an ObjectQuery.
// </summary>
// <param name="connection"> The connection against which this EntityCommand should execute </param>
// <param name="entityCommandDefinition"> The prepared command definition that can be executed using this EntityCommand </param>
internal EntityCommand(
EntityConnection connection, EntityCommandDefinition entityCommandDefinition, DbInterceptionContext context, EntityDataReaderFactory factory = null)
: this(entityCommandDefinition, context, factory)
{
_connection = connection;
}
// <summary>
// Internal constructor used by EntityCommandDefinition
// </summary>
// <param name="commandDefinition"> The prepared command definition that can be executed using this EntityCommand </param>
internal EntityCommand(EntityCommandDefinition commandDefinition, DbInterceptionContext context, EntityDataReaderFactory factory = null)
: this(context, factory)
{
// Assign other member fields from the parameters
_commandDefinition = commandDefinition;
_parameters = new EntityParameterCollection();
// Make copies of the parameters
foreach (var parameter in commandDefinition.Parameters)
{
_parameters.Add(parameter.Clone());
}
// Reset the dirty flag that was set to true when the parameters were added so that it won't say
// it's dirty to start with
_parameters.ResetIsDirty();
// Track the fact that this command was created from and represents an already prepared command definition
_isCommandDefinitionBased = true;
}
