Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import java.util.ArrayList;

import java.util.Collection;

import java.util.List;
import java.util.ListIterator;
import java.util.Objects;
import java.util.function.BiConsumer;
import java.util.function.BiPredicate;

public class Main {
    public static <E> void updateList(List<E> origList, Collection<? extends E> updateList) {
        updateList(origList, updateList, true, true, true, Objects::equals);
    }

    public static <E> void updateList(List<E> origList, Collection<? extends E> updateList, boolean add,
            boolean replace, boolean remove) {
        updateList(origList, updateList, add, replace, remove, Objects::equals);
    }

    public static <E> void updateList(List<E> origList, Collection<? extends E> updateList, boolean add,
            boolean replace, boolean remove, BiPredicate<? super E, ? super E> comparer) {
        updateList(origList, updateList, add, replace, remove, comparer,
                (List<E> list, Collection<? extends E> itemsToAdd) -> origList.addAll(itemsToAdd));
    }

    private static <E> void updateList(List<E> origList, Collection<? extends E> updateList, boolean add,
            boolean replace, boolean remove, BiPredicate<? super E, ? super E> equalTester,
            BiConsumer<List<E>, Collection<? extends E>> adder) {
        List<E> itemsToRemove = null;
        List<E> itemsToAdd = null;
        for (E update : updateList) {
            boolean origListContainsUpdate = false;
            ListIterator<E> origIter = origList.listIterator();
            while (origIter.hasNext()) {
                E orig = origIter.next();
                if (equalTester.test(orig, update)) {
                    origListContainsUpdate = true;
                    if (remove) {
                        if (itemsToRemove == null) {
                            itemsToRemove = new ArrayList<>(origList);
                        }
                        itemsToRemove.remove(orig);
                    }
                    if (replace) {
                        origIter.set(update);
                    }
                    break;
                }
            }
            if (!origListContainsUpdate && add) {
                if (itemsToAdd == null) {
                    itemsToAdd = new ArrayList<>();
                }
                itemsToAdd.add(update);
            }
        }
        if (remove) {
            if (itemsToRemove != null) {
                origList.removeAll(itemsToRemove);
            } else {
                origList.clear();
            }
        }
        if (itemsToAdd != null) {
            adder.accept(origList, itemsToAdd);
        }
    }
}