XMLSerializer

The XMLSerializer class has powerfull methods to serialize any Apex Class intance and deserialize any XML file or String (without sintax errors and root tag) into an Apex Class instance, like JSON Class provided by Salesforce. You can Serialize Pretty and Serialize Minified or serialize into full XML String with root tag and prolog and Deserialize into a specific object or Deserialize Untyped into a Map<String, Object>.

Serialize XML

Serialize any object into a Minified XML String.

For example, we want to serialize the next objects structure

public class ObjectToSerialize {
    public String name;
    public String lastName;
    public Address address;
    public List<Product> products;
}

public class Address {
    public String street;
    public Integer number;
}

public class Product {
    public String name;
    public Double price;
}

ObjectToSerialize obj = new ObjectToSerialize();
// Map the obj values
String xml = XMLSerializer.serialize(obj);        // To include null values
String xml = XMLSerializer.serialize(obj, false); // To supress null values

// If you want to include some null values, but not all, you can use the NULL_KEYWORD constant, like:

ObjectToSerialize obj = new ObjectToSerialize();
obj.lastName = XMLSerializer.NULL_KEYWORD;
// Map other fields
String xml = XMLSerializer.serialize(obj, false); // Suppress al null values, and put null values tags into XMLSerializer.NULL_KEYWORD mapped fields.

System.debug(xml);

<name>nameValue</name><lastName>nameValue</lastName><address><street>streetValue</street><number>10</number></address><products><name>nameValue</name><price>50.5</price></products><products><name>nameValue</name><price>52.5</price></products><products><name>nameValue</name><price>60.0</price></products>

Serialize Pretty XML

Serialize any object into a Pretty XML String

ObjectToSerialize obj = new ObjectToSerialize();
// Map the obj values
String xml = XMLSerializer.serializePretty(obj);        // To include null values
String xml = XMLSerializer.serializePretty(obj, false); // To supress null values

// If you want to include some null values, but not all, you can use the NULL_KEYWORD constant, like:

ObjectToSerialize obj = new ObjectToSerialize();
obj.lastName = XMLSerializer.NULL_KEYWORD;
// Map other fields
String xml = XMLSerializer.serializePretty(obj, false); // Suppress al null values, and put null values tags into XMLSerializer.NULL_KEYWORD mapped fields.

System.debug(xml);

<name>nameValue</name>
<lastName/> <!-- null value -->
<address>
    <street>streetValue</street>
    <number>10</number>
</address>
<products>
    <name>nameValue</name>
    <price>50.5</price>
</products>
<products>
    <name>nameValue</name>
    <price>52.5</price>
</products>
<products>
    <name>nameValue</name>
    <price>60.0</price>
</products>

To XML

Serialize any object into XML File String (with XML prolog and root tag)

Deserialize

Deserialize any XML String or Dom.Document into specific object

Deserialize Untyped

Deserialize any XML String or Dom.Document untyped into a Map<String, Object>