/*
* Copyright 2015 JBoss, by Red Hat, Inc
*
* 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 org.uberfire.ext.wires.bpmn.client.commands.impl;
import java.util.Arrays;
import java.util.List;
import java.util.Stack;
import org.uberfire.commons.validation.PortablePreconditions;
import org.uberfire.ext.wires.bpmn.client.commands.Command;
import org.uberfire.ext.wires.bpmn.client.commands.ResultType;
import org.uberfire.ext.wires.bpmn.client.commands.Results;
import org.uberfire.ext.wires.bpmn.client.rules.RuleManager;
/**
* A batch of Commands to be executed as an atomic unit
*/
public class BatchCommand implements Command {
private List<Command> commands;
public BatchCommand(final List<Command> commands) {
this.commands = PortablePreconditions.checkNotNull("commands",
commands);
}
public BatchCommand(final Command... commands) {
this.commands = Arrays.asList(PortablePreconditions.checkNotNull("commands",
commands));
}
@Override
public Results apply(final RuleManager ruleManager) {
final Results results = new DefaultResultsImpl();
final Stack<Command> appliedCommands = new Stack<Command>();
for (Command command : commands) {
results.getMessages().addAll(command.apply(ruleManager).getMessages());
if (results.contains(ResultType.ERROR)) {
for (Command undo : appliedCommands) {
undo.undo(ruleManager);
}
return results;
} else {
appliedCommands.add(command);
}
}
return results;
}
@Override
public Results undo(final RuleManager ruleManager) {
final Results results = new DefaultResultsImpl();
final Stack<Command> appliedCommands = new Stack<Command>();
for (Command command : commands) {
results.getMessages().addAll(command.undo(ruleManager).getMessages());
if (results.contains(ResultType.ERROR)) {
for (Command cmd : appliedCommands) {
cmd.apply(ruleManager);
}
return results;
} else {
appliedCommands.add(command);
}
}
return results;
}
}