me.tongfei.progressbar.wrapped.ProgressBarWrappedIterable Maven / Gradle / Ivy
package me.tongfei.progressbar.wrapped;
/*-
* #%L
* TongFei ProgressBar
* %%
* Copyright (C) 2014 - 2018 Tongfei Chen
* %%
* 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.
* #L%
*/
import java.util.Collection;
import java.util.Iterator;
/**
* @author Tongfei Chen
* @since 0.6.0
*/
public class ProgressBarWrappedIterable implements Iterable {
Iterable underlying;
String task;
public ProgressBarWrappedIterable(Iterable underlying, String task) {
this.underlying = underlying;
this.task = task;
}
@Override
public Iterator iterator() {
return new ProgressBarWrappedIterator<>(
underlying.iterator(),
task,
sizeOf(underlying)
);
}
private long sizeOf(Iterable iterable) {
// if size unknown, -1, hence indefinite progress bar
if (iterable instanceof Collection) {
return ((Collection) iterable).size();
}
return -1;
}
}