private IEnumerable <DbModificationClause> BuildSetClauses( DbExpressionBinding target, PropagatorResult row, PropagatorResult originalRow, TableChangeProcessor processor, bool insertMode, out Dictionary <int, string> outputIdentifiers, out DbExpression returning, ref bool rowMustBeTouched) { Dictionary <EdmProperty, PropagatorResult> dictionary = new Dictionary <EdmProperty, PropagatorResult>(); List <KeyValuePair <string, DbExpression> > keyValuePairList = new List <KeyValuePair <string, DbExpression> >(); outputIdentifiers = new Dictionary <int, string>(); PropagatorFlags propagatorFlags1 = insertMode ? PropagatorFlags.NoFlags : PropagatorFlags.Preserve | PropagatorFlags.Unknown; for (int index1 = 0; index1 < processor.Table.ElementType.Properties.Count; ++index1) { EdmProperty property = processor.Table.ElementType.Properties[index1]; PropagatorResult result = row.GetMemberValue(index1); if (-1 != result.Identifier) { result = result.ReplicateResultWithNewValue(this.m_translator.KeyManager.GetPrincipalValue(result)); } bool flag1 = false; bool flag2 = false; for (int index2 = 0; index2 < processor.KeyOrdinals.Length; ++index2) { if (processor.KeyOrdinals[index2] == index1) { flag2 = true; break; } } PropagatorFlags propagatorFlags2 = PropagatorFlags.NoFlags; if (!insertMode && flag2) { flag1 = true; } else { propagatorFlags2 |= result.PropagatorFlags; } StoreGeneratedPattern generatedPattern = MetadataHelper.GetStoreGeneratedPattern((EdmMember)property); bool flag3 = generatedPattern == StoreGeneratedPattern.Computed || insertMode && generatedPattern == StoreGeneratedPattern.Identity; if (flag3) { DbPropertyExpression propertyExpression = target.Variable.Property(property); keyValuePairList.Add(new KeyValuePair <string, DbExpression>(property.Name, (DbExpression)propertyExpression)); int identifier = result.Identifier; if (-1 != identifier) { if (this.m_translator.KeyManager.HasPrincipals(identifier)) { throw new InvalidOperationException(Strings.Update_GeneratedDependent((object)property.Name)); } outputIdentifiers.Add(identifier, property.Name); if (generatedPattern != StoreGeneratedPattern.Identity && processor.IsKeyProperty(index1)) { throw new NotSupportedException(Strings.Update_NotSupportedComputedKeyColumn((object)"StoreGeneratedPattern", (object)"Computed", (object)"Identity", (object)property.Name, (object)property.DeclaringType.FullName)); } } } if ((propagatorFlags2 & propagatorFlags1) != PropagatorFlags.NoFlags) { flag1 = true; } else if (flag3) { flag1 = true; rowMustBeTouched = true; } if (!flag1 && !insertMode && generatedPattern == StoreGeneratedPattern.Identity) { PropagatorResult memberValue = originalRow.GetMemberValue(index1); if (!ByValueEqualityComparer.Default.Equals(memberValue.GetSimpleValue(), result.GetSimpleValue())) { throw new InvalidOperationException(Strings.Update_ModifyingIdentityColumn((object)"Identity", (object)property.Name, (object)property.DeclaringType.FullName)); } flag1 = true; } if (!flag1) { dictionary.Add(property, result); } } returning = 0 >= keyValuePairList.Count ? (DbExpression)null : (DbExpression)DbExpressionBuilder.NewRow((IEnumerable <KeyValuePair <string, DbExpression> >)keyValuePairList); List <DbModificationClause> modificationClauseList = new List <DbModificationClause>(dictionary.Count); foreach (KeyValuePair <EdmProperty, PropagatorResult> keyValuePair in dictionary) { EdmProperty key = keyValuePair.Key; modificationClauseList.Add((DbModificationClause) new DbSetClause(UpdateCompiler.GeneratePropertyExpression(target, keyValuePair.Key), this.GenerateValueExpression(keyValuePair.Key, keyValuePair.Value))); } return((IEnumerable <DbModificationClause>)modificationClauseList); }
/// <summary> /// Determines column/value used to set values for a row. /// </summary> /// <remarks> /// The following columns are not included in the result: /// <list> /// <item>Keys in non-insert operations (keys are only set for inserts).</item> /// <item>Values flagged 'preserve' (these are values the propagator claims are untouched).</item> /// <item>Server generated values.</item> /// </list> /// </remarks> /// <param name="target"> Expression binding representing the table. </param> /// <param name="row"> Row containing values to set. </param> /// <param name="processor"> Context for table. </param> /// <param name="insertMode"> Determines whether key columns and 'preserve' columns are omitted from the list. </param> /// <param name="outputIdentifiers"> Dictionary listing server generated identifiers. </param> /// <param name="returning"> DbExpression describing result projection for server generated values. </param> /// <param name="rowMustBeTouched"> Indicates whether the row must be touched because it produces a value (e.g. computed) </param> /// <returns> Column value pairs. </returns> private IEnumerable <DbModificationClause> BuildSetClauses( DbExpressionBinding target, PropagatorResult row, PropagatorResult originalRow, TableChangeProcessor processor, bool insertMode, out Dictionary <int, string> outputIdentifiers, out DbExpression returning, ref bool rowMustBeTouched) { var setClauses = new Dictionary <EdmProperty, PropagatorResult>(); var returningArguments = new List <KeyValuePair <string, DbExpression> >(); outputIdentifiers = new Dictionary <int, string>(); // Determine which flags indicate a property should be omitted from the set list. var omitMask = insertMode ? PropagatorFlags.NoFlags : PropagatorFlags.Preserve | PropagatorFlags.Unknown; for (var propertyOrdinal = 0; propertyOrdinal < processor.Table.ElementType.Properties.Count; propertyOrdinal++) { var property = processor.Table.ElementType.Properties[propertyOrdinal]; // Type members and result values are ordinally aligned var propertyResult = row.GetMemberValue(propertyOrdinal); if (PropagatorResult.NullIdentifier != propertyResult.Identifier) { // retrieve principal value propertyResult = propertyResult.ReplicateResultWithNewValue( m_translator.KeyManager.GetPrincipalValue(propertyResult)); } var omitFromSetList = false; Debug.Assert(propertyResult.IsSimple); // Determine if this is a key value var isKey = false; for (var i = 0; i < processor.KeyOrdinals.Length; i++) { if (processor.KeyOrdinals[i] == propertyOrdinal) { isKey = true; break; } } // check if this value should be omitted var flags = PropagatorFlags.NoFlags; if (!insertMode && isKey) { // Keys are only set for inserts omitFromSetList = true; } else { // See if this value has been marked up with some context. If so, add the flag information // from the markup. Markup includes information about whether the property is a concurrency value, // whether it is known (it may be a property that is preserved across an update for instance) flags |= propertyResult.PropagatorFlags; } // Determine if this value is server-generated var genPattern = MetadataHelper.GetStoreGeneratedPattern(property); var isServerGen = genPattern == StoreGeneratedPattern.Computed || (insertMode && genPattern == StoreGeneratedPattern.Identity); if (isServerGen) { var propertyExpression = target.Variable.Property(property); returningArguments.Add(new KeyValuePair <string, DbExpression>(property.Name, propertyExpression)); // check if this is a server generated identifier var identifier = propertyResult.Identifier; if (PropagatorResult.NullIdentifier != identifier) { if (m_translator.KeyManager.HasPrincipals(identifier)) { throw new InvalidOperationException(Strings.Update_GeneratedDependent(property.Name)); } outputIdentifiers.Add(identifier, property.Name); // If this property maps an identifier (in the update pipeline) it may // also be a store key. If so, the pattern had better be "Identity" // since otherwise we're dealing with a mutable key. if (genPattern != StoreGeneratedPattern.Identity && processor.IsKeyProperty(propertyOrdinal)) { throw new NotSupportedException( Strings.Update_NotSupportedComputedKeyColumn( EdmProviderManifest.StoreGeneratedPatternFacetName, XmlConstants.Computed, XmlConstants.Identity, property.Name, property.DeclaringType.FullName)); } } } if (PropagatorFlags.NoFlags != (flags & (omitMask))) { // column value matches "omit" pattern, therefore should not be set omitFromSetList = true; } else if (isServerGen) { // column value does not match "omit" pattern, but it is server generated // so it cannot be set omitFromSetList = true; // if the row has a modified value overridden by server gen, // it must still be touched in order to retrieve the value rowMustBeTouched = true; } // make the user is not updating an identity value if (!omitFromSetList && !insertMode && genPattern == StoreGeneratedPattern.Identity) { //throw the error only if the value actually changed Debug.Assert(originalRow != null, "Updated records should have a original row"); var originalPropertyResult = originalRow.GetMemberValue(propertyOrdinal); Debug.Assert(originalPropertyResult.IsSimple, "Server Gen property that is not primitive?"); Debug.Assert(propertyResult.IsSimple, "Server Gen property that is not primitive?"); if (!ByValueEqualityComparer.Default.Equals(originalPropertyResult.GetSimpleValue(), propertyResult.GetSimpleValue())) { throw new InvalidOperationException( Strings.Update_ModifyingIdentityColumn( XmlConstants.Identity, property.Name, property.DeclaringType.FullName)); } else { omitFromSetList = true; } } if (!omitFromSetList) { setClauses.Add(property, propertyResult); } } // Construct returning projection if (0 < returningArguments.Count) { returning = DbExpressionBuilder.NewRow(returningArguments); } else { returning = null; } // Construct clauses corresponding to the set clauses var result = new List <DbModificationClause>(setClauses.Count); foreach (var setClause in setClauses) { var property = setClause.Key; result.Add( new DbSetClause( GeneratePropertyExpression(target, setClause.Key), GenerateValueExpression(setClause.Key, setClause.Value))); } return(result); }
/// <summary> /// Determines column/value used to set values for a row. /// </summary> /// <remarks> /// The following columns are not included in the result: /// <list> /// <item>Keys in non-insert operations (keys are only set for inserts).</item> /// <item>Values flagged 'preserve' (these are values the propagator claims are untouched).</item> /// <item>Server generated values.</item> /// </list> /// </remarks> /// <param name="target"> Expression binding representing the table. </param> /// <param name="row"> Row containing values to set. </param> /// <param name="processor"> Context for table. </param> /// <param name="insertMode"> Determines whether key columns and 'preserve' columns are omitted from the list. </param> /// <param name="outputIdentifiers"> Dictionary listing server generated identifiers. </param> /// <param name="returning"> DbExpression describing result projection for server generated values. </param> /// <param name="rowMustBeTouched"> Indicates whether the row must be touched because it produces a value (e.g. computed) </param> /// <returns> Column value pairs. </returns> private IEnumerable<DbModificationClause> BuildSetClauses( DbExpressionBinding target, PropagatorResult row, PropagatorResult originalRow, TableChangeProcessor processor, bool insertMode, out Dictionary<int, string> outputIdentifiers, out DbExpression returning, ref bool rowMustBeTouched) { var setClauses = new Dictionary<EdmProperty, PropagatorResult>(); var returningArguments = new List<KeyValuePair<string, DbExpression>>(); outputIdentifiers = new Dictionary<int, string>(); // Determine which flags indicate a property should be omitted from the set list. var omitMask = insertMode ? PropagatorFlags.NoFlags : PropagatorFlags.Preserve | PropagatorFlags.Unknown; for (var propertyOrdinal = 0; propertyOrdinal < processor.Table.ElementType.Properties.Count; propertyOrdinal++) { var property = processor.Table.ElementType.Properties[propertyOrdinal]; // Type members and result values are ordinally aligned var propertyResult = row.GetMemberValue(propertyOrdinal); if (PropagatorResult.NullIdentifier != propertyResult.Identifier) { // retrieve principal value propertyResult = propertyResult.ReplicateResultWithNewValue( m_translator.KeyManager.GetPrincipalValue(propertyResult)); } var omitFromSetList = false; Debug.Assert(propertyResult.IsSimple); // Determine if this is a key value var isKey = false; for (var i = 0; i < processor.KeyOrdinals.Length; i++) { if (processor.KeyOrdinals[i] == propertyOrdinal) { isKey = true; break; } } // check if this value should be omitted var flags = PropagatorFlags.NoFlags; if (!insertMode && isKey) { // Keys are only set for inserts omitFromSetList = true; } else { // See if this value has been marked up with some context. If so, add the flag information // from the markup. Markup includes information about whether the property is a concurrency value, // whether it is known (it may be a property that is preserved across an update for instance) flags |= propertyResult.PropagatorFlags; } // Determine if this value is server-generated var genPattern = MetadataHelper.GetStoreGeneratedPattern(property); var isServerGen = genPattern == StoreGeneratedPattern.Computed || (insertMode && genPattern == StoreGeneratedPattern.Identity); if (isServerGen) { var propertyExpression = target.Variable.Property(property); returningArguments.Add(new KeyValuePair<string, DbExpression>(property.Name, propertyExpression)); // check if this is a server generated identifier var identifier = propertyResult.Identifier; if (PropagatorResult.NullIdentifier != identifier) { if (m_translator.KeyManager.HasPrincipals(identifier)) { throw new InvalidOperationException(Strings.Update_GeneratedDependent(property.Name)); } outputIdentifiers.Add(identifier, property.Name); // If this property maps an identifier (in the update pipeline) it may // also be a store key. If so, the pattern had better be "Identity" // since otherwise we're dealing with a mutable key. if (genPattern != StoreGeneratedPattern.Identity && processor.IsKeyProperty(propertyOrdinal)) { throw new NotSupportedException( Strings.Update_NotSupportedComputedKeyColumn( EdmProviderManifest.StoreGeneratedPatternFacetName, XmlConstants.Computed, XmlConstants.Identity, property.Name, property.DeclaringType.FullName)); } } } if (PropagatorFlags.NoFlags != (flags & (omitMask))) { // column value matches "omit" pattern, therefore should not be set omitFromSetList = true; } else if (isServerGen) { // column value does not match "omit" pattern, but it is server generated // so it cannot be set omitFromSetList = true; // if the row has a modified value overridden by server gen, // it must still be touched in order to retrieve the value rowMustBeTouched = true; } // make the user is not updating an identity value if (!omitFromSetList && !insertMode && genPattern == StoreGeneratedPattern.Identity) { //throw the error only if the value actually changed Debug.Assert(originalRow != null, "Updated records should have a original row"); var originalPropertyResult = originalRow.GetMemberValue(propertyOrdinal); Debug.Assert(originalPropertyResult.IsSimple, "Server Gen property that is not primitive?"); Debug.Assert(propertyResult.IsSimple, "Server Gen property that is not primitive?"); if (!ByValueEqualityComparer.Default.Equals(originalPropertyResult.GetSimpleValue(), propertyResult.GetSimpleValue())) { throw new InvalidOperationException( Strings.Update_ModifyingIdentityColumn( XmlConstants.Identity, property.Name, property.DeclaringType.FullName)); } else { omitFromSetList = true; } } if (!omitFromSetList) { setClauses.Add(property, propertyResult); } } // Construct returning projection if (0 < returningArguments.Count) { returning = DbExpressionBuilder.NewRow(returningArguments); } else { returning = null; } // Construct clauses corresponding to the set clauses var result = new List<DbModificationClause>(setClauses.Count); foreach (var setClause in setClauses) { var property = setClause.Key; result.Add( new DbSetClause( GeneratePropertyExpression(target, setClause.Key), GenerateValueExpression(setClause.Key, setClause.Value))); } return result; }