content: /**
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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 org.apache.bigtop.datagenerators.bigpetstore.generators.products;
  
  import java.util.Iterator;
  
  import org.apache.bigtop.datagenerators.bigpetstore.datamodels.Product;
  import org.apache.bigtop.datagenerators.bigpetstore.generators.products.rules.Rule;
  
  public class ProductFilterIterator implements Iterator<Product>
  {
  	Rule rule;
  	Iterator<Product> products;
  	Product buffer;
  
  	public ProductFilterIterator(Rule rule, Iterator<Product> products)
  	{
  		this.rule = rule;
  		this.products = products;
  		this.buffer = getNext();
  	}
  
  	private Product getNext()
  	{
  		while(products.hasNext())
  		{
  			Product product = products.next();
  
  			if(!rule.ruleMatches(product))
  			{
  				return product;
  			}
  		}
  
  		return null;
  	}
  
  	@Override
  	public boolean hasNext()
  	{
  		return buffer != null;
  	}
  
  	@Override
  	public Product next()
  	{
  		Product previous = buffer;
  		buffer = getNext();
  
  		return previous;
  	}
  
  	@Override
  	public void remove()
  	{
  		throw new UnsupportedOperationException("ProductFilter does not support remove()");
  	}
  
  }
  