When you pass a URI identifying a particular schema language to that know how to process your schema language.
Then, install your JAR in one of these four locations.
The default response from a schema is to throw a to receive more detailed information about the document's problems.
For example, suppose you want to log all validation errors, but you don't want to stop processing when you encounter one.
Typically, the URL is the namespace Uniform Resource Identifier (URI) for the schema language. However, you can install additional libraries that add support for these and other schema languages.
The Java programming language isn't limited to a single schema factory.
However, it's usually done before any further processing of the input takes place.
(This description is painted with broad strokes -- there are exceptions.)Until recently, the exact Application Programming Interface (API) by which programs requested validation varied with the schema language and parser.
The Java Validation API includes a means to report such types, although it's surprisingly independent of the rest of the package. This simple interface, summarized in Listing 5, tells you the local name and namespace URI of a type.
The You can reuse the same validator and the same schema multiple times in series. Usually the document consumer should choose the schema, not the document producer. All other schema languages require an explicitly specified schema location. The abstract factory design pattern enables this one API to support many different schema languages and object models.
A single implementation usually supports only a subset of the numerous languages and models.
This is useful for adding constraints that are more easily checked in a Turing-complete language like Java than in a declarative language like the W3C XML Schema language.
You can define a mini-schema language, write a quick implementation, and plug it into the validation layer.
Obviously, this will vary from one schema to the next.