DefaultResourceResolver.java

package fr.sii.ogham.core.resource.resolver;

import fr.sii.ogham.core.exception.resource.ResourceResolutionException;
import fr.sii.ogham.core.resource.Resource;
import fr.sii.ogham.core.resource.path.ResolvedPath;
import fr.sii.ogham.core.resource.path.ResolvedResourcePath;
import fr.sii.ogham.core.resource.path.ResourcePath;

/**
 * Decorates an {@link AbstractPrefixedLookupPathResolver} to manage a default
 * case (no lookup found).
 * 
 * @author Cyril Dejonghe
 *
 */
public class DefaultResourceResolver implements DelegateResourceResolver {
    /**
     * The delegate resolver that will do the real resource resolution
     */
    private AbstractPrefixedLookupPathResolver delegate;

    /**
     * Initialize the resolver with the mandatory delegate.
     * 
     * @param delegate
     *            the resolver that will do the real resource resolution
     */
    public DefaultResourceResolver(AbstractPrefixedLookupPathResolver delegate) {
        super();
        this.delegate = delegate;
    }

    @Override
    public ResolvedPath resolve(ResourcePath path) {
        ResolvedPath result = delegate.resolve(path);
        if (result == null) {
            result = new ResolvedResourcePath(path, null, path.getOriginalPath());
        }
        return result;
    }

    @Override
    public boolean supports(ResourcePath path) {
        return true;
    }

    @Override
    public Resource getResource(ResourcePath path) throws ResourceResolutionException {
        return delegate.getResource(resolve(path));
    }

    @Override
    public ResourceResolver getActualResourceResolver() {
        return delegate instanceof DelegateResourceResolver ? ((DelegateResourceResolver) delegate).getActualResourceResolver() : delegate;
    }
}