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package com.oracle.webservices.api.databinding;

import java.util.Map;

/**
 * {@code DatabindingFactory} is the entry point of all the WebService 
 * Databinding APIs. A DatabindingFactory instance can be used to create 
 * Databinding.Builder instances, and Databinding.Builder 
 * instances are used to configure and build Databinding instances.
 * 
 * 
 * 
 * Following is an example that creates a {@code Databinding} which provides the
 * operations to serialize/deserialize a JavaCallInfo to/from a SOAP message:

 *  * DatabindingFactory factory = DatabindingFactory.newInstance();
 * Databinding.Builder builder = factory.createBuilder(seiClass, endpointClass);
 * Databinding databinding = builder.build(); 
 * 
 * 
 * 
 * @see com.oracle.webservices.api.databinding.Databinding
 * 
 * @author [email protected]
 */
public abstract class DatabindingFactory {

  /**
   * Creates a new instance of a Databinding.Builder which is 
   * initialized with the specified contractClass and endpointClass. The most 
   * importance initial states of a Builder object is the contract class which 
   * is also called "service endpoint interface" or "SEI" in JAX-WS and JAX-RPC, 
   * and the implementation bean class (endpointClass). The the implementation 
   * bean class (endpointClass) should be null if the Builder is to create
   * the client side proxy databinding.
   *
   * @param contractClass The service endpoint interface class
   * @param endpointClass The service implementation bean class
   * 
   * @return New instance of a Databinding.Builder
   */
  abstract public Databinding.Builder createBuilder(Class contractClass, Class endpointClass);

  /**
   * Access properties on the DatabindingFactory instance.
   *
   * @return properties of this WsFactory
   */
   abstract public Map properties();

	/**
	 * The default implementation class name.
	 */
   static final String ImplClass = "com.sun.xml.ws.db.DatabindingFactoryImpl";

  /**
   * Create a new instance of a DatabindingFactory. This static method 
   * creates a new factory instance.
   * 
   * Once an application has obtained a reference to a DatabindingFactory 
   * it can use the factory to obtain and configure a Databinding.Builder 
   * to build a Databinding instances.
   * 
   * @return New instance of a DatabindingFactory
   */
	static public DatabindingFactory newInstance() {
		try {
			Class cls = Class.forName(ImplClass);
			return convertIfNecessary(cls);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}
    
    @SuppressWarnings("deprecation")
    private static DatabindingFactory convertIfNecessary(Class cls) throws InstantiationException, IllegalAccessException {
        return (DatabindingFactory) cls.newInstance();
    }
}