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package com.sun.jersey.server.impl.uri.rules;

import com.sun.jersey.api.uri.UriTemplate;
import com.sun.jersey.core.reflection.ReflectionHelper;
import com.sun.jersey.spi.uri.rules.UriRule;
import com.sun.jersey.spi.uri.rules.UriRuleContext;
import com.sun.jersey.server.probes.UriRuleProbeProvider;
import java.util.Iterator;

/**
 * The rule for accepting a resource class.
 *
 * @author Paul.Sandoz@Sun.Com
 * @see com.sun.jersey.server.impl.application.RootResourceUriRules
 */
public final class ResourceClassRule extends BaseRule {

    /**
     * The class to analyze.
     * @see ResourceClassRule(UriTemplate,Class)
     */
    private final Class resourceClass;

    /**
     * Public constructor.
     * @param template The URI template
     * @param resourceClass The resource class
     */
    public ResourceClassRule(final UriTemplate template, final Class resourceClass) {
        super(template);
        this.resourceClass = resourceClass;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public boolean accept(CharSequence path, Object resource, UriRuleContext context) {
        // Set the template values
        pushMatch(context);

        // Get the resource instance from the resource class
        resource = context.getResource(resourceClass);
        context.pushResource(resource);

        if (context.isTracingEnabled()) {
            context.trace(
                String.format(
                    "accept resource: \"%s\" -> @Path(\"%s\") %s",
                    context.getUriInfo().getMatchedURIs().get(0),
                    getTemplate().getTemplate(),
                    ReflectionHelper.objectToString(resource)
                )
            );
        }

        UriRuleProbeProvider.ruleAccept(
            ResourceClassRule.class.getSimpleName(),
            path,
            resource
        );

        // Match sub-rules on the resource class
        final Iterator<UriRule> matches = context
            .getRules(resourceClass)
            .match(path, context);
        while (matches.hasNext()) {
            if (matches.next().accept(path, resource, context)) {
                return true;
            }
        }
        return false;
    }
}
