Line data    Source code

       1             : // Copyright (C) 2020 The Android Open Source Project
       2             : //
       3             : // Licensed under the Apache License, Version 2.0 (the "License");
       4             : // you may not use this file except in compliance with the License.
       5             : // You may obtain a copy of the License at
       6             : //
       7             : // http://www.apache.org/licenses/LICENSE-2.0
       8             : //
       9             : // Unless required by applicable law or agreed to in writing, software
      10             : // distributed under the License is distributed on an "AS IS" BASIS,
      11             : // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      12             : // See the License for the specific language governing permissions and
      13             : // limitations under the License.
      14             : 
      15             : package com.google.gerrit.acceptance.testsuite.change;
      16             : 
      17             : import com.google.common.collect.ImmutableList;
      18             : import java.util.function.Function;
      19             : 
      20             : /** Builder to simplify specifying multiple parents for a change. */
      21             : public class MultipleParentBuilder<T> {
      22             :   private final Function<ImmutableList<TestCommitIdentifier>, T> parentsToBuilderAdder;
      23             :   private final ImmutableList.Builder<TestCommitIdentifier> parents;
      24             : 
      25             :   public MultipleParentBuilder(
      26             :       Function<ImmutableList<TestCommitIdentifier>, T> parentsToBuilderAdder,
      27           4 :       TestCommitIdentifier firstParent) {
      28           4 :     this.parentsToBuilderAdder = parentsToBuilderAdder;
      29           4 :     parents = ImmutableList.builder();
      30           4 :     parents.add(firstParent);
      31           4 :   }
      32             : 
      33             :   /** Adds an intermediate parent. */
      34             :   public ParentBuilder<MultipleParentBuilder<T>> followedBy() {
      35           1 :     return new ParentBuilder<>(
      36             :         parent -> {
      37           1 :           parents.add(parent);
      38           1 :           return this;
      39             :         });
      40             :   }
      41             : 
      42             :   /** Adds the last parent. */
      43             :   public ParentBuilder<T> and() {
      44           4 :     return new ParentBuilder<>(
      45           4 :         (parent) -> parentsToBuilderAdder.apply(parents.add(parent).build()));
      46             :   }
      47             : }