Bug 187264 [DataBinding] "not to be implemented by clients" missing in IConverter Javadoc
I believe the intent of having separate IConverter and Converter is that IConverter should *not* be directly implementable by clients--in order to preserve our ability to evolve the IConverter API should that be necessary. Currently the API contract for IConverter says nothing about this. It needs to--before 3.3. :-)
bundles/org.eclipse.core.databinding/src/org/eclipse/core/databinding/conversion/IConverter.java
/**
	 * Returns the type whose instances can be converted by this converter. The
	 * return type is Object rather than Class to optionally support richer type
	 * systems than the one provided by Java reflection.
	 * 
	 * @return the type whose instances can be converted, or null if this
	 *         converter is untyped
	 */
	public Object getFromType();
	/**
	 * Returns the type to which this converter can convert. The return type is
	 * Object rather than Class to optionally support richer type systems than
	 * the one provided by Java reflection.
	 * 
	 * @return the type to which this converter can convert, or null if this
	 *         converter is untyped
	 */
	public Object getToType();
	/**
	 * Returns the result of the conversion of the given object.
	 * 
	 * @param fromObject
	 *            the object to convert, of type {@link #getFromType()}
	 * @return the converted object, of type {@link #getToType()}
	 */
	public Object convert(Object fromObject);
}