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/* Copyright (c) 2016, Isode Limited, London, England.
* All rights reserved.
*
* Acquisition and use of this software and related materials for any
* purpose requires a written license agreement from Isode Limited,
* or a written license from an organisation licensed by Isode Limited
* to grant such a license.
*
*/
package com.isode.stroke.whiteboard;
import com.isode.stroke.elements.WhiteboardDeleteOperation;
import com.isode.stroke.elements.WhiteboardInsertOperation;
import com.isode.stroke.elements.WhiteboardOperation;
import com.isode.stroke.elements.WhiteboardUpdateOperation;
public final class WhiteboardTransformer {
public static final class Pair {
public final WhiteboardOperation first;
public final WhiteboardOperation second;
public Pair(WhiteboardOperation first,WhiteboardOperation second) {
this.first = first;
this.second = second;
}
public Pair() {
this(new WhiteboardOperation(),new WhiteboardOperation());
}
}
private WhiteboardTransformer() {
// Static class so constructor is private
}
public static Pair transform(WhiteboardOperation clientOp,WhiteboardOperation serverOp) {
if (clientOp instanceof WhiteboardInsertOperation) {
WhiteboardInsertOperation clientInsert = (WhiteboardInsertOperation) clientOp;
if (serverOp instanceof WhiteboardInsertOperation) {
WhiteboardInsertOperation serverInsert = (WhiteboardInsertOperation) serverOp;
return transform(clientInsert, serverInsert);
}
else if (serverOp instanceof WhiteboardUpdateOperation) {
WhiteboardUpdateOperation serverUpdate = (WhiteboardUpdateOperation) serverOp;
return transform(clientInsert, serverUpdate);
}
else if (serverOp instanceof WhiteboardDeleteOperation) {
WhiteboardDeleteOperation serverDelete = (WhiteboardDeleteOperation) serverOp;
return transform(clientInsert, serverDelete);
}
}
else if (clientOp instanceof WhiteboardUpdateOperation) {
WhiteboardUpdateOperation clientUpdate = (WhiteboardUpdateOperation) clientOp;
if (serverOp instanceof WhiteboardInsertOperation) {
WhiteboardInsertOperation serverInsert = (WhiteboardInsertOperation) serverOp;
return transform(clientUpdate, serverInsert);
}
else if (serverOp instanceof WhiteboardUpdateOperation) {
WhiteboardUpdateOperation serverUpdate = (WhiteboardUpdateOperation) serverOp;
return transform(clientUpdate, serverUpdate);
}
else if (serverOp instanceof WhiteboardDeleteOperation) {
WhiteboardDeleteOperation serverDelete = (WhiteboardDeleteOperation) serverOp;
return transform(clientUpdate, serverDelete);
}
}
else if (clientOp instanceof WhiteboardDeleteOperation) {
WhiteboardDeleteOperation clientDelete = (WhiteboardDeleteOperation) clientOp;
if (serverOp instanceof WhiteboardInsertOperation) {
WhiteboardInsertOperation serverInsert = (WhiteboardInsertOperation) serverOp;
return transform(clientDelete, serverInsert);
}
else if (serverOp instanceof WhiteboardUpdateOperation) {
WhiteboardUpdateOperation serverUpdate = (WhiteboardUpdateOperation) serverOp;
return transform(clientDelete, serverUpdate);
}
else if (serverOp instanceof WhiteboardDeleteOperation) {
WhiteboardDeleteOperation serverDelete = (WhiteboardDeleteOperation) serverOp;
return transform(clientDelete, serverDelete);
}
}
return new Pair();
}
public static Pair transform(WhiteboardInsertOperation clientOp,WhiteboardInsertOperation serverOp) {
WhiteboardInsertOperation first = new WhiteboardInsertOperation(serverOp);
first.setParentID(clientOp.getID());
WhiteboardInsertOperation second = new WhiteboardInsertOperation(clientOp);
second.setParentID(serverOp.getID());
if (clientOp.getPos() <= serverOp.getPos()) {
first.setPos(first.getPos()+1);
}
else {
second.setPos(second.getPos()+1);
}
return new Pair(first,second);
}
public static Pair transform(WhiteboardUpdateOperation clientOp,WhiteboardUpdateOperation serverOp) {
WhiteboardUpdateOperation first = new WhiteboardUpdateOperation(serverOp);
first.setParentID(clientOp.getID());
WhiteboardUpdateOperation second;
if (clientOp.getPos() == serverOp.getPos()) {
second = new WhiteboardUpdateOperation(serverOp);
second.setID(clientOp.getID());
second.setParentID(serverOp.getID());
}
else {
second = new WhiteboardUpdateOperation(clientOp);
second.setParentID(serverOp.getID());
}
if (clientOp.getPos() < serverOp.getPos() && clientOp.getNewPos() > serverOp.getPos()) {
first.setPos(first.getPos()-1);
if (clientOp.getNewPos() >= serverOp.getNewPos()) {
first.setNewPos(first.getNewPos()-1);
}
}
else if (clientOp.getNewPos() >= serverOp.getNewPos()) {
first.setNewPos(first.getNewPos()-1);
}
if (serverOp.getPos() < clientOp.getPos() && serverOp.getNewPos() > clientOp.getPos()) {
second.setPos(second.getPos()-1);
if (serverOp.getNewPos() >= clientOp.getNewPos()) {
second.setNewPos(second.getNewPos()-1);
}
}
else if (serverOp.getNewPos() >= clientOp.getNewPos()) {
second.setNewPos(second.getNewPos()-1);
}
return new Pair(first,second);
}
public static Pair transform(WhiteboardUpdateOperation clientOp,WhiteboardInsertOperation serverOp) {
WhiteboardInsertOperation first = new WhiteboardInsertOperation(serverOp);
first.setParentID(clientOp.getID());
WhiteboardUpdateOperation second = new WhiteboardUpdateOperation(clientOp);
second.setParentID(serverOp.getID());
if (serverOp.getPos() <= clientOp.getPos()) {
second.setPos(second.getPos()+1);
}
return new Pair(first, second);
}
public static Pair transform(WhiteboardInsertOperation clientOp,WhiteboardUpdateOperation serverOp) {
WhiteboardUpdateOperation first = new WhiteboardUpdateOperation(serverOp);
first.setParentID(clientOp.getID());
WhiteboardInsertOperation second = new WhiteboardInsertOperation(clientOp);
second.setParentID(serverOp.getID());
if (serverOp.getPos() >= clientOp.getPos()) {
first.setPos(first.getPos()+1);
}
return new Pair(first,second);
}
public static Pair transform(WhiteboardDeleteOperation clientOp, WhiteboardDeleteOperation serverOp) {
WhiteboardDeleteOperation first = new WhiteboardDeleteOperation(serverOp);
first.setParentID(clientOp.getID());
WhiteboardDeleteOperation second = new WhiteboardDeleteOperation(clientOp);
second.setParentID(serverOp.getID());
if (clientOp.getPos() == -1) {
second.setPos(-1);
}
if (serverOp.getPos() == -1) {
first.setPos(-1);
}
if (clientOp.getPos() < serverOp.getPos()) {
first.setPos(first.getPos()-1);
}
else if (clientOp.getPos() > serverOp.getPos()) {
second.setPos(second.getPos()-1);
}
else {
first.setPos(-1);
second.setPos(-1);
}
return new Pair(first, second);
}
public static Pair transform(WhiteboardInsertOperation clientOp, WhiteboardDeleteOperation serverOp) {
WhiteboardDeleteOperation first = new WhiteboardDeleteOperation(serverOp);
first.setParentID(clientOp.getID());
WhiteboardInsertOperation second = new WhiteboardInsertOperation(clientOp);
second.setParentID(serverOp.getID());
if (clientOp.getPos() <= serverOp.getPos()) {
first.setPos(first.getPos()+1);
}
else if (serverOp.getPos() != -1) {
second.setPos(second.getPos()-1);
}
return new Pair(first, second);
}
public static Pair transform(WhiteboardDeleteOperation clientOp, WhiteboardInsertOperation serverOp) {
WhiteboardInsertOperation first = new WhiteboardInsertOperation(serverOp);
first.setParentID(clientOp.getID());
WhiteboardDeleteOperation second = new WhiteboardDeleteOperation(clientOp);
second.setParentID(serverOp.getID());
if (serverOp.getPos() <= clientOp.getPos()) {
second.setPos(second.getPos()+1);
}
else if (clientOp.getPos() != -1) {
first.setPos(first.getPos()-1);
}
return new Pair(first, second);
}
public static Pair transform(WhiteboardUpdateOperation clientOp, WhiteboardDeleteOperation serverOp) {
WhiteboardDeleteOperation first = new WhiteboardDeleteOperation(serverOp);
first.setParentID(clientOp.getID());
WhiteboardUpdateOperation updateOp = new WhiteboardUpdateOperation(clientOp);;
WhiteboardOperation second = updateOp;
second.setParentID(serverOp.getID());
if (clientOp.getPos() == serverOp.getPos()) {
WhiteboardDeleteOperation deleteOp = new WhiteboardDeleteOperation();
second = deleteOp;
second.setPos(-1);
second.setID(clientOp.getID());
second.setParentID(serverOp.getID());
deleteOp.setElementID(serverOp.getElementID());
}
else if (clientOp.getPos() > serverOp.getPos() && clientOp.getNewPos() <= serverOp.getPos()) {
second.setPos(second.getPos()-1);
}
else if (clientOp.getPos() < serverOp.getPos() && clientOp.getNewPos() >= serverOp.getPos()) {
updateOp.setNewPos(updateOp.getNewPos()-1);
}
else if (clientOp.getPos() > serverOp.getPos()) {
second.setPos(second.getPos() - 1);
updateOp.setNewPos(updateOp.getNewPos()-1);
}
return new Pair(first, second);
}
public static Pair transform(WhiteboardDeleteOperation clientOp, WhiteboardUpdateOperation serverOp) {
WhiteboardUpdateOperation updateOp = new WhiteboardUpdateOperation(serverOp);
WhiteboardOperation first = updateOp;
first.setParentID(clientOp.getID());
WhiteboardDeleteOperation second = new WhiteboardDeleteOperation(clientOp);
second.setParentID(serverOp.getID());
if (clientOp.getPos() == serverOp.getPos()) {
WhiteboardDeleteOperation deleteOp = new WhiteboardDeleteOperation();
first = deleteOp;
first.setPos(-1);
first.setID(serverOp.getID());
first.setParentID(clientOp.getID());
deleteOp.setElementID(clientOp.getElementID());
}
else if (clientOp.getPos() < serverOp.getPos() && clientOp.getPos() >= serverOp.getNewPos()) {
first.setPos(first.getPos()-1);
}
else if (clientOp.getPos() > serverOp.getPos() && clientOp.getPos() <= serverOp.getNewPos()) {
updateOp.setNewPos(updateOp.getNewPos()-1);
}
else if (clientOp.getPos() < serverOp.getPos()) {
first.setPos(first.getPos()-1);
updateOp.setNewPos(updateOp.getNewPos()-1);
}
return new Pair(first, second);
}
}
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Swift