resourceiterator.java

Java的面向对象数据库系统的源代码

package org.xmldb.api.base;

/*
 * The XML:DB Initiative Software License, Version 1.0
 *
 *
 * Copyright (c) 2000-2001 The XML:DB Initiative.  All rights
 * reserved.
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 * modification, are permitted provided that the following conditions
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 * if any, must include the following acknowledgment:
 * "This product includes software developed by the
 * XML:DB Initiative (http://www.xmldb.org/)."
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/**
 * ResourceIterator is used to iterate over a set of resources.
 */
public interface ResourceIterator {
   /**
    * Returns true as long as there are still more resources to be iterated.
    *
    * @return true if there are more resources to iterate, false otherwise.
    * @exception XMLDBException with expected error codes.<br />
    *  <code>ErrorCodes.VENDOR_ERROR</code> for any vendor
    *  specific errors that occur.<br />
    */
   boolean hasMoreResources() throws XMLDBException;


   /**
    * Returns the next <code>Resource</code> instance in the iterator.
    *
    * @return the next <code>Resource</code> instance in the iterator.
    * @exception XMLDBException with expected error codes.<br />
    *  <code>ErrorCodes.VENDOR_ERROR</code> for any vendor
    *  specific errors that occur.<br />
    *  <code>ErrorCodes.NO_SUCH_RESOURCE</code> if the resource iterator is 
    *  empty or all resources have already been retrieved.
    */
   Resource nextResource() throws XMLDBException;
}