| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.cassandra.simulator.utils; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.function.BiConsumer; |
| import java.util.function.Consumer; |
| |
| import org.apache.cassandra.distributed.api.IIsolatedExecutor.TriConsumer; |
| import org.apache.cassandra.utils.Throwables; |
| |
| public class CompactLists |
| { |
| public static <I> List<I> append(List<I> in, I append) |
| { |
| if (in == null) return Collections.singletonList(append); |
| else if (in.size() == 1) |
| { |
| List<I> out = new ArrayList<>(2); |
| out.add(in.get(0)); |
| out.add(append); |
| return out; |
| } |
| else |
| { |
| in.add(append); |
| return in; |
| } |
| } |
| |
| public static <I> List<I> remove(List<I> in, I remove) |
| { |
| if (in == null) return null; |
| else if (in.size() == 1) return in.contains(remove) ? null : in; |
| else |
| { |
| in.remove(remove); |
| return in; |
| } |
| } |
| |
| public static <I> Throwable safeForEach(List<I> list, Consumer<I> forEach) |
| { |
| if (list == null) |
| return null; |
| |
| if (list.size() == 1) |
| { |
| try |
| { |
| forEach.accept(list.get(0)); |
| return null; |
| } |
| catch (Throwable t) |
| { |
| return t; |
| } |
| } |
| |
| Throwable result = null; |
| for (int i = 0, maxi = list.size() ; i < maxi ; ++i) |
| { |
| try |
| { |
| forEach.accept(list.get(i)); |
| } |
| catch (Throwable t) |
| { |
| result = Throwables.merge(result, t); |
| } |
| } |
| return result; |
| } |
| |
| public static <I1, I2> Throwable safeForEach(List<I1> list, BiConsumer<I1, I2> forEach, I2 i2) |
| { |
| if (list == null) |
| return null; |
| |
| if (list.size() == 1) |
| { |
| try |
| { |
| forEach.accept(list.get(0), i2); |
| return null; |
| } |
| catch (Throwable t) |
| { |
| return t; |
| } |
| } |
| |
| Throwable result = null; |
| for (int i = 0, maxi = list.size() ; i < maxi ; ++i) |
| { |
| try |
| { |
| forEach.accept(list.get(i), i2); |
| } |
| catch (Throwable t) |
| { |
| result = Throwables.merge(result, t); |
| } |
| } |
| return result; |
| } |
| |
| public static <I1, I2, I3> Throwable safeForEach(List<I1> list, TriConsumer<I1, I2, I3> forEach, I2 i2, I3 i3) |
| { |
| if (list == null) |
| return null; |
| |
| if (list.size() == 1) |
| { |
| try |
| { |
| forEach.accept(list.get(0), i2, i3); |
| return null; |
| } |
| catch (Throwable t) |
| { |
| return t; |
| } |
| } |
| |
| Throwable result = null; |
| for (int i = 0, maxi = list.size() ; i < maxi ; ++i) |
| { |
| try |
| { |
| forEach.accept(list.get(i), i2, i3); |
| } |
| catch (Throwable t) |
| { |
| result = Throwables.merge(result, t); |
| } |
| } |
| return result; |
| } |
| |
| |
| } |