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package com.sun.jersey.server.impl.template;

import com.sun.jersey.spi.template.ResolvedViewable;
import com.sun.jersey.api.view.Viewable;
import com.sun.jersey.core.spi.component.ProviderServices;
import com.sun.jersey.spi.template.TemplateProcessor;
import com.sun.jersey.spi.template.TemplateContext;
import com.sun.jersey.spi.template.TemplateContextException;
import com.sun.jersey.spi.template.ViewProcessor;
import java.util.List;
import java.util.Set;
import javax.ws.rs.core.UriInfo;

/**
 *
 * @author [email protected]
 */
public final class TemplateFactory implements TemplateContext {
    
    private final Set viewProcessors;

    public TemplateFactory(ProviderServices providerServices) {
        viewProcessors = providerServices.getProvidersAndServices(
                ViewProcessor.class);

        Set templateProcessors = providerServices.getProvidersAndServices(
                TemplateProcessor.class);

        for (TemplateProcessor tp : templateProcessors) {
            viewProcessors.add(new TemplateViewProcessor(tp));
        }
    }

    /**
     * Get the set of template processors.
     *
     * @return the set of template processors.
     */
    private Set getViewProcessors() {
        return viewProcessors;
    }

    // TemplateContext
    
    public ResolvedViewable resolveViewable(Viewable v) {
        if (v.isTemplateNameAbsolute()) {
            return resolveAbsoluteViewable(v);
        } else if (v.getResolvingClass() != null) {
            return resolveRelativeViewable(v, v.getResolvingClass());
        } else {
            if (v.getModel() == null)
                throw new TemplateContextException("The model of the view MUST not be null");

            return resolveRelativeViewable(v, v.getModel().getClass());
        }
    }

    public ResolvedViewable resolveViewable(Viewable v, UriInfo ui) {
        if (v.isTemplateNameAbsolute()) {
            return resolveAbsoluteViewable(v);
        } else if (v.getResolvingClass() != null) {
            return resolveRelativeViewable(v, v.getResolvingClass());
        } else {
            final List mrs = ui.getMatchedResources();
            if (mrs == null || mrs.size() == 0)
                throw new TemplateContextException("There is no last matching resource available");

            return resolveRelativeViewable(v, mrs.get(0).getClass());
        }
    }

    public ResolvedViewable resolveViewable(Viewable v, Class resolvingClass) {
        if (v.isTemplateNameAbsolute()) {
            return resolveAbsoluteViewable(v);
        } else if (v.getResolvingClass() != null) {
            return resolveRelativeViewable(v, v.getResolvingClass());
        } else {
            if (resolvingClass == null)
                throw new TemplateContextException("Resolving class MUST not be null");
            
            return resolveRelativeViewable(v, resolvingClass);
        }
    }

    
    private ResolvedViewable resolveAbsoluteViewable(Viewable v) {
        for (ViewProcessor vp : getViewProcessors()) {
            Object resolvedTemplateObject = vp.resolve(v.getTemplateName());
            if (resolvedTemplateObject != null) {
                return new ResolvedViewable(vp, resolvedTemplateObject, v);
            }
        }

        return null;
    }

    private ResolvedViewable resolveRelativeViewable(Viewable v, Class resolvingClass) {
        String path = v.getTemplateName();
        if (path == null || path.length() == 0)
            path = "index";

        // Find in directories
        for (Class c = resolvingClass; c != Object.class; c = c.getSuperclass()) {
            String absolutePath = getAbsolutePath(c, path, '/');

            for (ViewProcessor vp : getViewProcessors()) {
                Object resolvedTemplateObject = vp.resolve(absolutePath);
                if (resolvedTemplateObject != null) {
                    return new ResolvedViewable(vp, resolvedTemplateObject, v, c);
                }
            }
        }

        // Find in flat files
        for (Class c = resolvingClass; c != Object.class; c = c.getSuperclass()) {
            String absolutePath = getAbsolutePath(c, path, '.');

            for (ViewProcessor vp : getViewProcessors()) {
                Object resolvedTemplateObject = vp.resolve(absolutePath);
                if (resolvedTemplateObject != null) {
                    return new ResolvedViewable(vp, resolvedTemplateObject, v, c);
                }
            }
        }

        return null;
    }

    private String getAbsolutePath(Class resourceClass, String path, char delim) {
        return '/' + resourceClass.getName().replace('.', '/').replace('$', delim) + delim + path;
    }
}    

    

    

                
 
            

    

                
 
            



    
    






    
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