/*
 * Copyright 2011-2016 David Karnok
 *
 * 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 ix;

import java.util.Iterator;
import java.util.concurrent.Callable;

/**
 * Repeatedly call a Callable indefinitely.
 *
 * @param <T> the value type
 */
final class IxRepeatCallable<T> extends Ix<T> implements Iterator<T> {

    final Callable<T> callable;

    IxRepeatCallable(Callable<T> callable) {
        this.callable = callable;
    }

    @Override
    public Iterator<T> iterator() {
        return this;
    }

    @Override
    public boolean hasNext() {
        return true;
    }

    @Override
    public T next() {
        return checkedCall(callable);
    }

    @Override
    public void remove() {
        throw new UnsupportedOperationException();
    }
}
