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/**
 *
 * Copyright (C) 2010 Cloud Conscious, LLC. 
 *
 * ====================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ====================================================================
 */

package org.jclouds.atmosonline.saas;

import java.net.URI;

import javax.ws.rs.Consumes;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.HEAD;
import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;

import org.jclouds.atmosonline.saas.binders.BindMetadataToHeaders;
import org.jclouds.atmosonline.saas.domain.AtmosObject;
import org.jclouds.atmosonline.saas.domain.BoundedSet;
import org.jclouds.atmosonline.saas.domain.DirectoryEntry;
import org.jclouds.atmosonline.saas.domain.SystemMetadata;
import org.jclouds.atmosonline.saas.domain.UserMetadata;
import org.jclouds.atmosonline.saas.filters.SignRequest;
import org.jclouds.atmosonline.saas.functions.AtmosObjectName;
import org.jclouds.atmosonline.saas.functions.ParseDirectoryListFromContentAndHeaders;
import org.jclouds.atmosonline.saas.functions.ParseObjectFromHeadersAndHttpContent;
import org.jclouds.atmosonline.saas.functions.ParseSystemMetadataFromHeaders;
import org.jclouds.atmosonline.saas.functions.ReturnEndpointIfAlreadyExists;
import org.jclouds.atmosonline.saas.options.ListOptions;
import org.jclouds.blobstore.functions.ThrowContainerNotFoundOn404;
import org.jclouds.blobstore.functions.ThrowKeyNotFoundOn404;
import org.jclouds.http.options.GetOptions;
import org.jclouds.rest.annotations.BinderParam;
import org.jclouds.rest.annotations.ExceptionParser;
import org.jclouds.rest.annotations.ParamParser;
import org.jclouds.rest.annotations.QueryParams;
import org.jclouds.rest.annotations.RequestFilters;
import org.jclouds.rest.annotations.ResponseParser;
import org.jclouds.rest.annotations.SkipEncoding;
import org.jclouds.rest.functions.ReturnFalseOnNotFoundOr404;
import org.jclouds.rest.functions.ReturnNullOnNotFoundOr404;
import org.jclouds.rest.functions.ReturnVoidOnNotFoundOr404;

import com.google.common.util.concurrent.ListenableFuture;

/**
 * Provides asynchronous access to EMC Atmos Online Storage resources via their REST API.
 * 
 * 
 * @see AtmosStorageClient
 * @see 
 * @author Adrian Cole
 */
@RequestFilters(SignRequest.class)
@SkipEncoding('/')
@Path("/rest/namespace")
public interface AtmosStorageAsyncClient {
   /**
    * Creates a default implementation of AtmosObject
    */
   AtmosObject newObject();

   /**
    * @see AtmosStorageClient#listDirectories
    */
   @GET
   @Path("")
   @ResponseParser(ParseDirectoryListFromContentAndHeaders.class)
   @Consumes(MediaType.TEXT_XML)
   ListenableFuture> listDirectories(ListOptions... options);

   /**
    * @see AtmosStorageClient#listDirectory
    */
   @GET
   @Path("/{directoryName}/")
   @ResponseParser(ParseDirectoryListFromContentAndHeaders.class)
   @ExceptionParser(ThrowContainerNotFoundOn404.class)
   @Consumes(MediaType.TEXT_XML)
   ListenableFuture> listDirectory(
            @PathParam("directoryName") String directoryName, ListOptions... options);

   /**
    * @see AtmosStorageClient#createDirectory
    */
   @POST
   @Path("/{directoryName}/")
   @ExceptionParser(ReturnEndpointIfAlreadyExists.class)
   @Produces(MediaType.APPLICATION_OCTET_STREAM)
   @Consumes(MediaType.WILDCARD)
   ListenableFuture createDirectory(@PathParam("directoryName") String directoryName);

   /**
    * @see AtmosStorageClient#createFile
    */
   @POST
   @Path("/{parent}/{name}")
   @Consumes(MediaType.WILDCARD)
   ListenableFuture createFile(
            @PathParam("parent") String parent,
            @PathParam("name") @ParamParser(AtmosObjectName.class) @BinderParam(BindMetadataToHeaders.class) AtmosObject object);

   /**
    * @see AtmosStorageClient#updateFile
    */
   @PUT
   @Path("/{parent}/{name}")
   @ExceptionParser(ThrowKeyNotFoundOn404.class)
   @Consumes(MediaType.WILDCARD)
   ListenableFuture updateFile(
            @PathParam("parent") String parent,
            @PathParam("name") @ParamParser(AtmosObjectName.class) @BinderParam(BindMetadataToHeaders.class) AtmosObject object);

   /**
    * @see AtmosStorageClient#readFile
    */
   @GET
   @ResponseParser(ParseObjectFromHeadersAndHttpContent.class)
   @ExceptionParser(ReturnNullOnNotFoundOr404.class)
   @Path("/{path}")
   @Consumes(MediaType.WILDCARD)
   ListenableFuture readFile(@PathParam("path") String path, GetOptions... options);

   /**
    * @see AtmosStorageClient#headFile
    */
   @HEAD
   @ResponseParser(ParseObjectFromHeadersAndHttpContent.class)
   @ExceptionParser(ReturnNullOnNotFoundOr404.class)
   @Path("/{path}")
   @Consumes(MediaType.WILDCARD)
   ListenableFuture headFile(@PathParam("path") String path);

   /**
    * @see AtmosStorageClient#getSystemMetadata
    */
   @HEAD
   @ResponseParser(ParseSystemMetadataFromHeaders.class)
   @ExceptionParser(ReturnNullOnNotFoundOr404.class)
   // currently throws 403 errors @QueryParams(keys = "metadata/system")
   @Path("/{path}")
   @Consumes(MediaType.WILDCARD)
   ListenableFuture getSystemMetadata(@PathParam("path") String path);

   /**
    * @see AtmosStorageClient#getUserMetadata
    */
   @HEAD
   @ResponseParser(ParseSystemMetadataFromHeaders.class)
   @ExceptionParser(ReturnNullOnNotFoundOr404.class)
   @Path("/{path}")
   @QueryParams(keys = "metadata/user")
   @Consumes(MediaType.WILDCARD)
   ListenableFuture getUserMetadata(@PathParam("path") String path);

   /**
    * @see AtmosStorageClient#deletePath
    */
   @DELETE
   @ExceptionParser(ReturnVoidOnNotFoundOr404.class)
   @Path("/{path}")
   @Consumes(MediaType.WILDCARD)
   ListenableFuture deletePath(@PathParam("path") String path);

   /**
    * @see AtmosStorageClient#pathExists
    */
   @HEAD
   @ExceptionParser(ReturnFalseOnNotFoundOr404.class)
   @Path("/{path}")
   @Consumes(MediaType.WILDCARD)
   ListenableFuture pathExists(@PathParam("path") String path);

   // signature currently doesn't work
   // @POST
   // @QueryParams(keys = "acl")
   // @Headers(keys = { "x-emc-useracl", "x-emc-groupacl" }, values = { "root=FULL_CONTROL",
   // "other=READ" })
   // @Consumes(MediaType.WILDCARD)
   // void makePublic(@Endpoint URI url);

}