io.activej.ot.TransformResult Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of activej-ot Show documentation

Implementation of operational transformation technology. Allows building collaborative software systems.

There is a newer version: 6.0-rc2

/*
 * Copyright (C) 2020 ActiveJ LLC.
 *
 * 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 io.activej.ot;

import java.util.List;

import static java.util.Collections.emptyList;
import static java.util.Collections.singletonList;

public class TransformResult {
	public enum ConflictResolution {LEFT, RIGHT}

	public final ConflictResolution resolution;
	public final List left;
	public final List right;

	private TransformResult(ConflictResolution resolution, List left, List right) {
		this.resolution = resolution;
		this.left = left;
		this.right = right;
	}

	public static  TransformResult conflict(ConflictResolution conflict) {
		return new TransformResult<>(conflict, null, null);
	}

	public static  TransformResult empty() {
		return new TransformResult<>(null, emptyList(), emptyList());
	}

	@SuppressWarnings("unchecked")
	public static  TransformResult of(List left, List right) {
		return new TransformResult<>(null, (List) left, (List) right);
	}

	@SuppressWarnings("unchecked")
	public static  TransformResult of(ConflictResolution conflict, List left, List right) {
		return new TransformResult<>(conflict, (List) left, (List) right);
	}

	public static  TransformResult of(D left, D right) {
		return of(singletonList(left), singletonList(right));
	}

	public static  TransformResult left(D left) {
		return of(singletonList(left), emptyList());
	}

	public static  TransformResult left(List left) {
		return of(left, emptyList());
	}

	public static  TransformResult right(D right) {
		return of(emptyList(), singletonList(right));
	}

	public static  TransformResult right(List right) {
		return of(emptyList(), right);
	}

	public boolean hasConflict() {
		return resolution != null;
	}

	@Override
	public String toString() {
		return "{" +
				"left=" + left +
				", right=" + right +
				'}';
	}
}