Move remaining REST handlers into restapi subpackage

This moves most Collections and all RestViews for
{change,group,account,access} into server/restapi/ . These have to be
done a single change and end up in a single java_library as these four
groups use each other's code.

Resources are left in place, to maintain compatibility for plugins.

Some Json classes (ActionJson, ChangeJson, GroupJson) have many
dependencies on the server library, so they are left in the server
package.

Revisisons (the Collection for RevisionResource) is left in place, as
it is used in ActionJson

This reduces the giant server package from ~1200 to ~900 files.

Change-Id: Id0d9030ad2845d636875e6139a08243f8b624338

java/com/google/gerrit/server/restapi/project/ProjectsCollection.java

@@ -0,0 +1,169 @@
+// Copyright (C) 2012 The Android Open Source Project
+//
+// 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 com.google.gerrit.server.restapi.project;
+
+import com.google.common.collect.ListMultimap;
+import com.google.gerrit.common.Nullable;
+import com.google.gerrit.extensions.registration.DynamicMap;
+import com.google.gerrit.extensions.restapi.AcceptsCreate;
+import com.google.gerrit.extensions.restapi.AuthException;
+import com.google.gerrit.extensions.restapi.BadRequestException;
+import com.google.gerrit.extensions.restapi.IdString;
+import com.google.gerrit.extensions.restapi.NeedsParams;
+import com.google.gerrit.extensions.restapi.ResourceNotFoundException;
+import com.google.gerrit.extensions.restapi.RestCollection;
+import com.google.gerrit.extensions.restapi.RestView;
+import com.google.gerrit.extensions.restapi.TopLevelResource;
+import com.google.gerrit.extensions.restapi.UnprocessableEntityException;
+import com.google.gerrit.reviewdb.client.Project;
+import com.google.gerrit.server.CurrentUser;
+import com.google.gerrit.server.OutputFormat;
+import com.google.gerrit.server.permissions.PermissionBackend;
+import com.google.gerrit.server.permissions.PermissionBackendException;
+import com.google.gerrit.server.permissions.ProjectPermission;
+import com.google.gerrit.server.project.ProjectCache;
+import com.google.gerrit.server.project.ProjectResource;
+import com.google.gerrit.server.project.ProjectState;
+import com.google.inject.Inject;
+import com.google.inject.Provider;
+import com.google.inject.Singleton;
+import java.io.IOException;
+import org.eclipse.jgit.lib.Constants;
+
+@Singleton
+public class ProjectsCollection
+    implements RestCollection<TopLevelResource, ProjectResource>,
+        AcceptsCreate<TopLevelResource>,
+        NeedsParams {
+  private final DynamicMap<RestView<ProjectResource>> views;
+  private final Provider<ListProjects> list;
+  private final Provider<QueryProjects> queryProjects;
+  private final ProjectCache projectCache;
+  private final PermissionBackend permissionBackend;
+  private final Provider<CurrentUser> user;
+  private final CreateProject.Factory createProjectFactory;
+
+  private boolean hasQuery;
+
+  @Inject
+  ProjectsCollection(
+      DynamicMap<RestView<ProjectResource>> views,
+      Provider<ListProjects> list,
+      Provider<QueryProjects> queryProjects,
+      ProjectCache projectCache,
+      PermissionBackend permissionBackend,
+      CreateProject.Factory factory,
+      Provider<CurrentUser> user) {
+    this.views = views;
+    this.list = list;
+    this.queryProjects = queryProjects;
+    this.projectCache = projectCache;
+    this.permissionBackend = permissionBackend;
+    this.user = user;
+    this.createProjectFactory = factory;
+  }
+
+  @Override
+  public void setParams(ListMultimap<String, String> params) throws BadRequestException {
+    // The --query option is defined in QueryProjects
+    this.hasQuery = params.containsKey("query");
+  }
+
+  @Override
+  public RestView<TopLevelResource> list() {
+    if (hasQuery) {
+      return queryProjects.get();
+    }
+    return list.get().setFormat(OutputFormat.JSON);
+  }
+
+  @Override
+  public ProjectResource parse(TopLevelResource parent, IdString id)
+      throws ResourceNotFoundException, IOException, PermissionBackendException {
+    ProjectResource rsrc = _parse(id.get(), true);
+    if (rsrc == null) {
+      throw new ResourceNotFoundException(id);
+    }
+    return rsrc;
+  }
+
+  /**
+   * Parses a project ID from a request body and returns the project.
+   *
+   * @param id ID of the project, can be a project name
+   * @return the project
+   * @throws UnprocessableEntityException thrown if the project ID cannot be resolved or if the
+   *     project is not visible to the calling user
+   * @throws IOException thrown when there is an error.
+   * @throws PermissionBackendException
+   */
+  public ProjectResource parse(String id)
+      throws UnprocessableEntityException, IOException, PermissionBackendException {
+    return parse(id, true);
+  }
+
+  /**
+   * Parses a project ID from a request body and returns the project.
+   *
+   * @param id ID of the project, can be a project name
+   * @param checkAccess if true, check the project is accessible by the current user
+   * @return the project
+   * @throws UnprocessableEntityException thrown if the project ID cannot be resolved or if the
+   *     project is not visible to the calling user and checkVisibility is true.
+   * @throws IOException thrown when there is an error.
+   * @throws PermissionBackendException
+   */
+  public ProjectResource parse(String id, boolean checkAccess)
+      throws UnprocessableEntityException, IOException, PermissionBackendException {
+    ProjectResource rsrc = _parse(id, checkAccess);
+    if (rsrc == null) {
+      throw new UnprocessableEntityException(String.format("Project Not Found: %s", id));
+    }
+    return rsrc;
+  }
+
+  @Nullable
+  private ProjectResource _parse(String id, boolean checkAccess)
+      throws IOException, PermissionBackendException {
+    if (id.endsWith(Constants.DOT_GIT_EXT)) {
+      id = id.substring(0, id.length() - Constants.DOT_GIT_EXT.length());
+    }
+
+    Project.NameKey nameKey = new Project.NameKey(id);
+    ProjectState state = projectCache.checkedGet(nameKey);
+    if (state == null) {
+      return null;
+    }
+
+    if (checkAccess) {
+      try {
+        permissionBackend.user(user).project(nameKey).check(ProjectPermission.ACCESS);
+      } catch (AuthException e) {
+        return null; // Pretend like not found on access denied.
+      }
+    }
+    return new ProjectResource(state, user.get());
+  }
+
+  @Override
+  public DynamicMap<RestView<ProjectResource>> views() {
+    return views;
+  }
+
+  @Override
+  public CreateProject create(TopLevelResource parent, IdString name) {
+    return createProjectFactory.create(name.get());
+  }
+}