Introduce "AdaptiveResource"

[filip26]

The AdaptiveResource class represents a resource that dynamically adapts to provide various representations on demand.

e.g.

/**
 * The AdaptiveResource class represents a linked data resource that dynamically adapts to provide various 
 * representations on demand, while preserving and exposing the original document source.
 * <p>
 * This class is designed for scenarios where a single document source (such as an RDF file, JSON-LD document, or XML file)
 * is used to construct a resource that can be represented in multiple formats. The original source is maintained to 
 * ensure that data provenance and integrity are preserved throughout any transformations.
 * </p>
 * <p>
 * AdaptiveResource encapsulates the logic for detecting, generating, and caching heterogeneous representations
 * (e.g., RDF, JSON-LD, XML) based on the original document source. Representations are created lazily – they are only 
 * generated when explicitly requested.
 * </p>
 * <p>
 * Example usage:
 * <pre>
 *     // Initialize the AdaptiveResource with an original document.
 *     Document originalDocument = ...; // Load or create your document source.
 *     AdaptiveResource resource = new AdaptiveResource(originalDocument);
 *
 *     // Retrieve the RDF representation on demand.
 *     Representation rdfRepresentation = resource.getRepresentation(RepresentationType.RDF);
 *
 *     // Access the preserved original source.
 *     Document getOriginal = resource.getOriginalSource();
 * </pre>
 * </p>
 * <p>
 * This class leverages design patterns such as Adapter and Strategy to manage the complexities of various data formats 
 * while providing a unified interface for processing. It is particularly useful for applications dealing with linked data 
 * that require flexible, on-demand conversion between formats without losing the original context.
 * </p>
 *
 * @author 
 * @version 1.0
 */
public class AdaptiveResource {
    // Class implementation goes here.
}