Handlers · 2 min read

OracleXmlTypeToXElementPropertyHandler

A property handler that maps the Oracle XMLType type into an XElement property.

A property handler that maps the Oracle XMLType type into an XElement property.

The XML text is bound as a string, which Oracle converts implicitly, and is therefore subject to the string parameter size limit.

Overview

Name	Description
Class	`OracleXmlTypeToXElementPropertyHandler`
Namespace	`RepoDb.PropertyHandlers.Oracle`
Package	RepoDb.Oracle
Implements	IPropertyHandler`<object, XElement>`
Column type	The Oracle `XMLType` type
Property type	`XElement`

Conversions

Method	Direction	Description
Get	Database to property	Converts the value returned by the driver (an `OracleXmlType` or a `string`) into XML text and parses it via `XElement.Parse()`. `null`, `DBNull`, a null `OracleXmlType` and an empty value are returned as `null`.
Set	Property to database	Converts the `XElement` into its unformatted XML text via `ToString(SaveOptions.DisableFormatting)`. A `null` value is written as `null`.

Exceptions

Exception	Thrown When
`ArgumentException`	The type of the value returned by the driver is not supported.

Usability

Bind the handler to the property that maps to an XMLType column.

Attribute

public class Document
{
    public int Id { get; set; }

    [Map("content"), PropertyHandler(typeof(OracleXmlTypeToXElementPropertyHandler))]
    public XElement Content { get; set; }
}

Once bound, the library invokes the handler automatically when the property is read or written.

using (var connection = new OracleConnection(connectionString))
{
    var content = XElement.Parse("<root><item id=\"1\" /></root>");
    connection.Insert(new Document { Id = 1, Content = content });
    var document = connection.Query<Document>(e => e.Id == 1).First();
}

Fluent Mapping

To configure via FluentMapper:

FluentMapper
    .Entity<Document>()
    .PropertyHandler<OracleXmlTypeToXElementPropertyHandler>(e => e.Content);

Property Level Mapping

To configure via PropertyHandlerMapper:

PropertyHandlerMapper.Add<Document, OracleXmlTypeToXElementPropertyHandler>(e => e.Content, new OracleXmlTypeToXElementPropertyHandler(), true);

Type Level Mapping

To apply the handler to every property of the type XElement:

PropertyHandlerMapper.Add<XElement, OracleXmlTypeToXElementPropertyHandler>(new OracleXmlTypeToXElementPropertyHandler(), true);