package org.psjava.util;

import java.util.Iterator;

import org.psjava.ds.PSCollection;

public class MergedCollection {

public static <T> PSCollection<T> wrap(final Iterable<? extends PSCollection<? extends T>> collections) {

return new PSCollection<T>() {

@Override

public Iterator<T> iterator() {

return MergedIterator.create(collections);

}

@Override

public boolean isEmpty() {

for (PSCollection<? extends T> c : collections)

if (!c.isEmpty())

return false;

return true;

}

@Override

public int size() {

int sum = 0;

for (PSCollection<? extends T> c : collections)

sum += c.size();

return sum;

}

@Override

public String toString() {

return IterableToString.toString(this);

}

};

}

private MergedCollection() {

}

}