Application: gvSIG desktop » Library: org.gvsig.tools

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package org.gvsig.tools.util;

import java.util.Iterator;

import java.util.function.Predicate;

/**

 *

 * @author jjdelcerro

 * @param <T>

 */

public class FilteredIterator<T> implements Iterator<T> {

  private final Iterator<T> it;

  private final Predicate<T> filter;

  private T next;

  public FilteredIterator(Iterator<T> it, Predicate<T> filter) {

    this.it = it;

    this.filter = filter;

    this.next = null;

  }

  @Override

  public boolean hasNext() {

    while( this.it.hasNext() ) {

      this.next = this.it.next();

      if( this.filter.test(this.next) ) {

        return true;

      }

    }

    return false;

  }

  @Override

  public T next() {

    return this.next;

  }

}