JSON-Schema Support

Juneau provides the {@link oaj.json.JsonSchemaSerializer} class for generating JSON-Schema documents that describe the output generated by the {@link oaj.json.JsonSerializer} class.
This class shares the same properties as `JsonSerializer`.
For convenience the {@link oaj.json.JsonSerializer#getSchemaSerializer()} method has been added for creating instances of schema serializers from the regular serializer instance.

##### Sample Beans

public class Person { // Bean properties public String name; public Calendar birthDate; public List<Address> addresses; // Getters/setters omitted } public class Address { // Bean properties public String street, city; public StateEnum state; public int zip; public boolean isCurrent; // Getters/setters omitted }

The code for creating our POJO model and generating JSON-Schema is shown below:

// Get the one of the default schema serializers. JsonSchemaSerializer s = JsonSchemaSerializer.DEFAULT_SIMPLE_READABLE; // Get the JSON Schema for the POJO. String jsonSchema = s.serialize(new Person()); // This also works. jsonSchema = s.serialize(Person.class);

##### JSON Schema

{ type: 'object', description: 'org.apache.juneau.sample.Person', properties: { name: { type: 'string', description: 'java.lang.String' }, birthDate: { type: 'string', description: 'java.util.Calendar' }, addresses: { type: 'array', description: 'java.util.LinkedList<org.apache.juneau.sample.Address>', items: { type: 'object', description: 'org.apache.juneau.sample.Address', properties: { street: { type: 'string', description: 'java.lang.String' }, city: { type: 'string', description: 'java.lang.String' }, state: { type: 'string', description: 'java.lang.String' }, zip: { type: 'number', description: 'int' }, isCurrent: { type: 'boolean', description: 'boolean' } } } } } }