// Copyright 2012 Google Inc. All Rights Reserved.
//
// 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 com.google.collide.client.util;
import com.google.collide.json.shared.JsonArray;
import com.google.collide.shared.util.JsonCollections;
/**
* Executes the queued commands after {@link #execute(Runnable)} has been called
* the given number of times.
*
* Any calls to {@link #execute(Runnable)} after the given count has been
* reached will be executed synchronously.
*
*/
public class CountExecutor implements Executor {
private final int totalCount;
private int curCount;
private final JsonArray<Runnable> commands = JsonCollections.createArray();
public CountExecutor(int totalCount) {
this.totalCount = totalCount;
}
/**
* Called with the intent to either have the given {@code command} executed
* and/or increase the count.
*
* @param command optional, the command to execute
*/
@Override
public void execute(Runnable command) {
if (command != null) {
commands.add(command);
}
if (++curCount == totalCount) {
for (int i = 0, n = commands.size(); i < n; i++) {
commands.get(i).run();
}
} else if (curCount > totalCount) {
command.run();
}
}
}