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

import com.sun.jersey.api.core.HttpContext;
import com.sun.jersey.api.model.AbstractResource;
import com.sun.jersey.api.uri.UriTemplate;
import com.sun.jersey.core.header.MediaTypes;
import com.sun.jersey.server.impl.model.method.ResourceHttpOptionsMethod;
import com.sun.jersey.server.impl.model.method.ResourceMethod;
import com.sun.jersey.server.wadl.WadlApplicationContext;
import com.sun.jersey.server.wadl.WadlBuilder;
import com.sun.jersey.server.wadl.WadlGenerator;
import com.sun.research.ws.wadl.Application;
import com.sun.research.ws.wadl.Resource;

import javax.ws.rs.core.Response;
import javax.ws.rs.core.UriInfo;
import java.util.List;
import java.util.Map;

/**
 *
 * @author [email protected]
 */
/* package */ final class WadlMethodFactory {

    public static final class WadlOptionsMethod extends ResourceMethod {
        public WadlOptionsMethod(Map> methods,
                                 AbstractResource resource, String path, WadlGenerator wadlGenerator,
                                 WadlApplicationContext wadlApplicationContext) {
            super("OPTIONS",
                    UriTemplate.EMPTY,
                    MediaTypes.GENERAL_MEDIA_TYPE_LIST,
                    MediaTypes.GENERAL_MEDIA_TYPE_LIST,
                    false,
                    new WadlOptionsMethodDispatcher(methods, resource, path, wadlGenerator, wadlApplicationContext));
        }

        @Override
        public String toString() {
            return "WADL OPTIONS method" ;
        }
    }

    private static final class WadlOptionsMethodDispatcher extends
            ResourceHttpOptionsMethod.OptionsRequestDispatcher {
        private final AbstractResource resource;
        private final String path;
        private final WadlGenerator wadlGenerator;
        private final WadlApplicationContext wadlApplicationContext;

        WadlOptionsMethodDispatcher(Map> methods,
                                    AbstractResource resource, String path, WadlGenerator wadlGenerator,
                                    WadlApplicationContext wadlApplicationContext) {
            super(methods);
            this.resource = resource;
            this.path = path;
            this.wadlGenerator = wadlGenerator;
            this.wadlApplicationContext = wadlApplicationContext;
        }

        @Override
        public void dispatch(final Object o, final HttpContext context) {
            if(wadlApplicationContext.isWadlGenerationEnabled()) {
                final Application a = generateApplication(context.getUriInfo(),
                        resource, path, wadlGenerator);

                context.getResponse().setResponse(
                        Response.ok(a, MediaTypes.WADL).header("Allow", allow).build());
            } else {
                if(!wadlApplicationContext.isWadlGenerationEnabled())
                    context.getResponse().setResponse(Response.status(Response.Status.NO_CONTENT).header("Allow", allow).build());
            }
        }
    }

    private static Application generateApplication(UriInfo info,
                                                   AbstractResource resource, String path, WadlGenerator wadlGenerator) {
        Application a = path == null ? new WadlBuilder( wadlGenerator ).generate(resource) :
                new WadlBuilder( wadlGenerator ).generate(resource, path);

        a.getResources().setBase(info.getBaseUri().toString());

        final Resource r = a.getResources().getResource().get(0);
        r.setPath(info.getBaseUri().relativize(
                info.getAbsolutePath()).toString());

        // remove path params since path is fixed at this point
        r.getParam().clear();

        return a;
    }
}




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