/// <summary>
/// Creates a key structural value for a QueryEntityValue
/// </summary>
/// <param name="queryEntityValue">Query EntityValue to create the key from</param>
/// <returns>A Query Key Structural Value</returns>
public static QueryKeyStructuralValue Key(this QueryEntityValue queryEntityValue)
{
ExceptionUtilities.CheckArgumentNotNull(queryEntityValue, "queryEntityValue");
ExceptionUtilities.Assert(!queryEntityValue.IsNull, "queryEntityValue cannot be null");
return(new QueryKeyStructuralValue(queryEntityValue));
}
/// <summary>
/// Initializes a new instance of the QueryKeyStructuralValue class.
/// </summary>
/// <param name="entityInstance">Entity Instance</param>
internal QueryKeyStructuralValue(QueryEntityValue entityInstance)
: base(entityInstance.Type, false, null, entityInstance.Type.EvaluationStrategy)
{
ExceptionUtilities.CheckArgumentNotNull(entityInstance, "entityInstance");
this.queryEntityType = entityInstance.Type as QueryEntityType;
this.keyProperties = this.queryEntityType.Properties.Where(p => p.IsPrimaryKey).ToList();
ExceptionUtilities.CheckObjectNotNull(this.queryEntityType, "queryEntityType");
ExceptionUtilities.Assert(this.keyProperties.Count > 0, "There are no key properties on QueryEntityType '{0}'", this.queryEntityType);
foreach (QueryProperty keyProperty in this.keyProperties)
{
this.SetValue(keyProperty.Name, entityInstance.GetScalarValue(keyProperty.Name));
}
}
/// <summary>
/// Initializes a new instance of the QueryKeyStructuralValue class.
/// </summary>
/// <param name="entityInstance">Entity Instance</param>
internal QueryKeyStructuralValue(QueryEntityValue entityInstance)
: base(entityInstance.Type, false, null, entityInstance.Type.EvaluationStrategy)
{
ExceptionUtilities.CheckArgumentNotNull(entityInstance, "entityInstance");
this.queryEntityType = entityInstance.Type as QueryEntityType;
this.keyProperties = this.queryEntityType.Properties.Where(p => p.IsPrimaryKey).ToList();
ExceptionUtilities.CheckObjectNotNull(this.queryEntityType, "queryEntityType");
ExceptionUtilities.Assert(this.keyProperties.Count > 0, "There are no key properties on QueryEntityType '{0}'", this.queryEntityType);
foreach (QueryProperty keyProperty in this.keyProperties)
{
this.SetValue(keyProperty.Name, entityInstance.GetScalarValue(keyProperty.Name));
}
}
/// <summary>
/// Creates a key structural value for a QueryEntityValue
/// </summary>
/// <param name="queryEntityType">Query Entity Type that has key metadata to extract key information</param>
/// <param name="entityInstance">Entity Instance object value that contains the key</param>
/// <returns>A Query Key Structural Value</returns>
public static QueryKeyStructuralValue GetEntityInstanceKey(this QueryEntityType queryEntityType, object entityInstance)
{
ExceptionUtilities.CheckArgumentNotNull(queryEntityType, "queryEntityType");
ExceptionUtilities.CheckArgumentNotNull(entityInstance, "entityInstance");
ExceptionUtilities.Assert(queryEntityType.ClrType.IsAssignableFrom(entityInstance.GetType()), "entityInstance of type '{0}' is not assignable to queryEntityType '{1}'", entityInstance.GetType(), queryEntityType.EntityType.FullName);
QueryEntityValue keyValueContainer = new QueryEntityValue(queryEntityType, false, null, queryEntityType.EvaluationStrategy);
foreach (QueryProperty keyProperty in queryEntityType.Properties.Where(m => m.IsPrimaryKey))
{
PropertyInfo pi = entityInstance.GetType().GetProperty(keyProperty.Name);
keyValueContainer.SetPrimitiveValue(keyProperty.Name, pi.GetValue(entityInstance, null));
}
return(new QueryKeyStructuralValue(keyValueContainer));
}