org.glassfish.admin.rest.composite.metadata.RestResourceMetadata Maven / Gradle / Ivy

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package org.glassfish.admin.rest.composite.metadata;

import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import javax.json.Json;
import javax.json.JsonException;
import javax.json.JsonObject;
import javax.json.JsonObjectBuilder;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.OPTIONS;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.core.MultivaluedHashMap;
import org.glassfish.admin.rest.OptionsCapable;
import org.glassfish.admin.rest.utils.JsonUtil;

/**
 *
 * @author jdlee
 */
public class RestResourceMetadata {
    private MultivaluedHashMap resourceMethods = new MultivaluedHashMap();
    private List subResources = new ArrayList();
    private final OptionsCapable context;

    public RestResourceMetadata(OptionsCapable context) {
        this.context = context;
        processClass();
    }

    public MultivaluedHashMap getResourceMethods() {
        return resourceMethods;
    }

    public void setResourceMethods(MultivaluedHashMap resourceMethods) {
        this.resourceMethods = resourceMethods;
    }

    public List getSubResources() {
        return subResources;
    }

    public void setSubResources(List subResources) {
        this.subResources = subResources;
    }

    private void processClass() {
        for (Method m : context.getClass().getMethods()) {
            Annotation designator = getMethodDesignator(m);

            if (designator != null) {
                final String httpMethod = designator.annotationType().getSimpleName();
                RestMethodMetadata rmm = new RestMethodMetadata(context, m, designator);
//                if (resourceMethods.containsKey(httpMethod)) {
    //                    throw new RuntimeException("Multiple " + httpMethod + " methods found on resource: " +
//                            context.getClass().getName());
//                }
                resourceMethods.add(httpMethod, rmm);
            }

            final Path path = m.getAnnotation(Path.class);
            if (path != null) {
                subResources.add(context.getUriInfo().getAbsolutePathBuilder().build().toASCIIString() + "/" + path.value());
            }
        }

        Collections.sort(subResources);
    }

    private Annotation getMethodDesignator(Method method) {
        Annotation a = method.getAnnotation(GET.class);
        if (a == null) {
            a = method.getAnnotation(POST.class);
            if (a == null) {
                a = method.getAnnotation(DELETE.class);
                if (a == null) {
                    a = method.getAnnotation(OPTIONS.class);
                }
            }
        }

        return a;
    }

    public JsonObject toJson() throws JsonException {
        JsonObjectBuilder o = Json.createObjectBuilder();

        if (!resourceMethods.isEmpty()) {
            final JsonObjectBuilder methods = Json.createObjectBuilder();
            for (Map.Entry> entry : resourceMethods.entrySet()) {
                for (RestMethodMetadata rmm : entry.getValue()) {
                    methods.add(entry.getKey(), rmm.toJson());
                }
            }

            o.add("resourceMethods", methods);
        }

        if (!subResources.isEmpty()) {
            o.add("subResources", JsonUtil.getJsonValue(subResources));
        }

        return o.build();
    }
}