resource.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.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    the documentation and/or other materials provided with the
 *    distribution.
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 * 3. The end-user documentation included with the redistribution,
 *    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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 *    if and wherever such third-party acknowledgments normally appear.
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/**
 * <code>Resource</code> is a container for data stored within the database. Raw resources
 * are not particulary useful. It is necessary to have a resource implementation
 * that provides handling for a specific content type before anything useful can
 * be done.
 */
public interface Resource {      
   /**
    * Returns the <code>Collection</code> instance that this resource is 
    * associated with. All resources must exist within the context of a 
    * <code>collection</code>.
    *
    * @return the collection associated with the resource.
    * @exception XMLDBException with expected error codes.<br />
    *  <code>ErrorCodes.VENDOR_ERROR</code> for any vendor
    *  specific errors that occur.<br /> 
    */
   Collection getParentCollection() throws XMLDBException;

   /**
    * Returns the unique id for this Resource or null if the resource is
    * anonymous.
    *
    * @return the id for the Resource or null if no id exists.
    * @exception XMLDBException with expected error codes.<br />
    *  <code>ErrorCodes.VENDOR_ERROR</code> for any vendor
    *  specific errors that occur.<br /> 
    */
   String getId() throws XMLDBException;

   /**
    * Returns the resource type for this Resource. 
    * <p />
    * XML:DB defined resource types are: <p />
    * XMLResource - all XML data stored in the database<br />
    * BinaryResource - Binary blob data stored in the database<br />
    * 
    * @return the resource type for the Resource.
    * @exception XMLDBException with expected error codes.<br />
    *  <code>ErrorCodes.VENDOR_ERROR</code> for any vendor
    *  specific errors that occur.<br /> 
    */
   String getResourceType() throws XMLDBException;
   
   /**
    * Retrieves the content from the resource. The type of the content varies
    * depending what type of resource is being used.
    *
    * @return the content of the resource.
    * @exception XMLDBException with expected error codes.<br />
    *  <code>ErrorCodes.VENDOR_ERROR</code> for any vendor
    *  specific errors that occur.<br /> 
    */
   Object getContent() throws XMLDBException;

   /**
    * Sets the content for this resource. The type of content that can be set
    * depends on the type of resource being used.
    *
    * @param value the content value to set for the resource.
    * @exception XMLDBException with expected error codes.<br />
    *  <code>ErrorCodes.VENDOR_ERROR</code> for any vendor
    *  specific errors that occur.<br /> 
    */
   void setContent(Object value) throws XMLDBException;
}