// Copyright (C) 2014 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.googlesource.gerrit.plugins.deleteproject.projectconfig;

import com.google.common.base.Function;
import com.google.common.base.Joiner;
import com.google.common.collect.Iterables;
import com.google.gerrit.extensions.common.ProjectInfo;
import com.google.gerrit.server.project.ListChildProjects;
import com.google.gerrit.server.project.ProjectResource;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.googlesource.gerrit.plugins.deleteproject.CannotDeleteProjectException;
import com.googlesource.gerrit.plugins.deleteproject.ProtectedProjects;
import java.util.List;

public class ProjectConfigDeleteHandler {

  private final ProtectedProjects protectedProjects;
  private final Provider<ListChildProjects> listChildProjectsProvider;

  @Inject
  public ProjectConfigDeleteHandler(
      ProtectedProjects protectedProjects, Provider<ListChildProjects> listChildProjectsProvider) {
    this.protectedProjects = protectedProjects;
    this.listChildProjectsProvider = listChildProjectsProvider;
  }

  public void assertCanDelete(ProjectResource rsrc) throws CannotDeleteProjectException {
    protectedProjects.assertIsNotProtected(rsrc);
    assertHasNoChildProjects(rsrc);
  }

  private void assertHasNoChildProjects(ProjectResource rsrc) throws CannotDeleteProjectException {
    List<ProjectInfo> children = listChildProjectsProvider.get().apply(rsrc);
    if (!children.isEmpty()) {
      String childrenString =
          Joiner.on(", ")
              .join(
                  Iterables.transform(
                      children,
                      new Function<ProjectInfo, String>() {
                        @Override
                        public String apply(ProjectInfo info) {
                          return info.name;
                        }
                      }));
      throw new CannotDeleteProjectException(
          "Cannot delete project because it has children: " + childrenString);
    }
  }
}

@@ -683,122 +683,52 @@
 ort 
-com.google.common.base.Function;%0Aimport com.google.common.base.Joiner;%0Aimport com.google.common.collect.Iterables;
+static java.util.stream.Collectors.joining;%0A
 %0Aimp
@@ -1969,411 +1969,8 @@
 ) %7B%0A
-      String childrenString =%0A          Joiner.on(%22, %22)%0A              .join(%0A                  Iterables.transform(%0A                      children,%0A                      new Function%3CProjectInfo, String%3E() %7B%0A                        @Override%0A                        public String apply(ProjectInfo info) %7B%0A                          return info.name;%0A                        %7D%0A                      %7D));%0A
     
@@ -2074,25 +2074,87 @@
 n: %22
- + childrenString
+%0A              + children.stream().map(info -%3E info.name).collect(joining(%22,%22))
 );%0A 

Replace Guava functional constructs with Java native ones