ReflectIterableLazy.java

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package pt.isel.mpd14.aula32;

import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.function.Predicate;
import static pt.isel.mpd14.aula32.ReflectUtils.and;

/**
 *
 * @author Miguel Gamboa at CCISEL
 */
class ReflectIterableLazy<T> implements ReflectIterable<T> {
    final Iterable<T> src;
    final Predicate<T> pred;

    public ReflectIterableLazy(Iterable<T> src, Predicate<T> pred) {
        this.src = src;
        this.pred = pred;
    }
     
    public ReflectIterableLazy(Iterable<T> src) {
        this.src = src;
        this.pred = null;
    }
    
    @Override
    public ReflectIterable<T> filter(String fieldName, Object expected) {
        Predicate<T> newPred = and(pred, new ReflectPredicate<>(fieldName, expected));
        return new ReflectIterableLazy<T>(src, newPred);
    }

    @Override
    public Iterator<T> iterator() {
        if(pred == null) return src.iterator();
        return new RelfectIteratorLazy();
    }

    private class RelfectIteratorLazy implements Iterator<T> {

        public RelfectIteratorLazy() {
        }

        @Override
        public boolean hasNext() {
            throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
        }

        @Override
        public T next() {
            throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
        }
    }
    
}