productsbodytag.java

基于struts框架的web开发应用实例

/**
 *
 * $Header: /raid1/wide/cvsroot/wide/dev/struts/struts-metadata/templates/new-app/nitroX-tour/site/WEB-INF/src/java/com/hp/mw/samples/struts/storefront/taglibs/ProductsBodyTag.java,v 1.1 2005/10/10 20:12:04 sami Exp $
 *
 * Copyright (c) 2002 by M7 Corporation
 * All rights reserved.
 *
 * The information contained herein is confidential and proprietary
 * to M7 Corporation, and considered a trade secret as defined under
 * civil and criminal statutes.  M7 Corporation shall pursue its
 * civil and criminal remedies in the event of unauthorized use or
 * misappropriation of its trade secrets.  Use of this information
 * by anyone other than authorized employees of M7 Corporation is
 * granted only under a written non-disclosure agreement, expressly
 * prescribing the scope and manner of such use.
 *
 */
package com.hp.mw.samples.struts.storefront.taglibs;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;

import javax.servlet.jsp.PageContext;
import javax.sql.DataSource;

import com.hp.mw.samples.struts.storefront.dataaccess.DataMiddle;
import com.hp.mw.samples.struts.storefront.databeans.Product;
import com.hp.mw.samples.struts.storefront.datasources.ConfigurableDataSource;




/**
 *
 * @author <a href="mailto:[e-mail]">Zaitrarrio Collier</a>
 * @version $ Revision: $
 */
public class ProductsBodyTag
    extends ArbitraryIteratorBodyTag
{
  /**
    * Default value for <code>serialVersionUID</code> required for Serializable class
    */
   private static final long serialVersionUID = 1L;

	private String dataMiddleId;
	private int dataMiddleScope;
	
    //~ Constructors -----------------------------------------------------------

    public ProductsBodyTag(  ) {
    	setDataMiddleScope(PageContext.APPLICATION_SCOPE);
    }

	/**
	 * @return
	 */
	public String getDataMiddleId() {
		return dataMiddleId;
	}

	/**
	 * @return
	 */
	public int getDataMiddleScope() {
		return dataMiddleScope;
	}

	/**
	 * @param string
	 */
	public void setDataMiddleId(String string) {
		dataMiddleId = string;
	}

	/**
	 * @param i
	 */
	public void setDataMiddleScope(int i) {
		dataMiddleScope = i;
	}	

	/* (non-Javadoc)
	 * @see com.hp.mw.samples.struts.storefront.taglibs.ArbitraryIteratorBodyTag#getIterator()
	 */
	protected Iterator getIterator() throws Exception {
		DataSource ds = ConfigurableDataSource.sInstance;
		DataMiddle dba = (DataMiddle) pageContext.getAttribute(dataMiddleId, dataMiddleScope);
		if (dba == null) { 
			dba = new DataMiddle(); 
			dba.setDataSource(ds);
			pageContext.setAttribute(dataMiddleId, dba, dataMiddleScope);
		}

		Collection products = new ArrayList();
		String[] ids = new String[] { "91", "95", "92", "94", "93" };		
		for (int i = 0; i < ids.length; i++) {
			Product prod = new Product();
			prod.setProductId(ids[i]);
			dba.find(prod); 
			products.add(prod); 
		}
		
		return products.iterator();
	}

}