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// DeclHandler.java - Optional handler for DTD declaration events.
// Public Domain: no warranty.
// $Id: DeclHandler.java,v 1.1 2000/10/02 02:43:19 sboag Exp $
package org.xml.sax.ext;
import org.xml.sax.SAXException;
/**
* SAX2 extension handler for DTD declaration events.
*
* <blockquote>
* <em>This module, both source code and documentation, is in the
* Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
* </blockquote>
*
* <p>This is an optional extension handler for SAX2 to provide
* information about DTD declarations in an XML document. XML
* readers are not required to support this handler.</p>
*
* <p>Note that data-related DTD declarations (unparsed entities and
* notations) are already reported through the {@link
* org.xml.sax.DTDHandler DTDHandler} interface.</p>
*
* <p>If you are using the declaration handler together with a lexical
* handler, all of the events will occur between the
* {@link org.xml.sax.ext.LexicalHandler#startDTD startDTD} and the
* {@link org.xml.sax.ext.LexicalHandler#endDTD endDTD} events.</p>
*
* <p>To set the DeclHandler for an XML reader, use the
* {@link org.xml.sax.XMLReader#setProperty setProperty} method
* with the propertyId "http://xml.org/sax/handlers/DeclHandler".
* If the reader does not support declaration events, it will throw a
* {@link org.xml.sax.SAXNotRecognizedException SAXNotRecognizedException}
* or a
* {@link org.xml.sax.SAXNotSupportedException SAXNotSupportedException}
* when you attempt to register the handler.</p>
*
* @since SAX 2.0
* @author David Megginson,
* <a href="mailto:sax@megginson.com">sax@megginson.com</a>
* @version 2.0beta
* @see org.xml.sax.XMLReader
*/
public interface DeclHandler
{
/**
* Report an element type declaration.
*
* <p>The content model will consist of the string "EMPTY", the
* string "ANY", or a parenthesised group, optionally followed
* by an occurrence indicator. The model will be normalized so
* that all whitespace is removed,and will include the enclosing
* parentheses.</p>
*
* @param name The element type name.
* @param model The content model as a normalized string.
* @exception SAXException The application may raise an exception.
*/
public abstract void elementDecl (String name, String model)
throws SAXException;
/**
* Report an attribute type declaration.
*
* <p>Only the effective (first) declaration for an attribute will
* be reported. The type will be one of the strings "CDATA",
* "ID", "IDREF", "IDREFS", "NMTOKEN", "NMTOKENS", "ENTITY",
* "ENTITIES", or "NOTATION", or a parenthesized token group with
* the separator "|" and all whitespace removed.</p>
*
* @param eName The name of the associated element.
* @param aName The name of the attribute.
* @param type A string representing the attribute type.
* @param valueDefault A string representing the attribute default
* ("#IMPLIED", "#REQUIRED", or "#FIXED") or null if
* none of these applies.
* @param value A string representing the attribute's default value,
* or null if there is none.
* @exception SAXException The application may raise an exception.
*/
public abstract void attributeDecl (String eName,
String aName,
String type,
String valueDefault,
String value)
throws SAXException;
/**
* Report an internal entity declaration.
*
* <p>Only the effective (first) declaration for each entity
* will be reported.</p>
*
* @param name The name of the entity. If it is a parameter
* entity, the name will begin with '%'.
* @param value The replacement text of the entity.
* @exception SAXException The application may raise an exception.
* @see #externalEntityDecl
* @see org.xml.sax.DTDHandler#unparsedEntityDecl
*/
public abstract void internalEntityDecl (String name, String value)
throws SAXException;
/**
* Report a parsed external entity declaration.
*
* <p>Only the effective (first) declaration for each entity
* will be reported.</p>
*
* @param name The name of the entity. If it is a parameter
* entity, the name will begin with '%'.
* @param publicId The declared public identifier of the entity, or
* null if none was declared.
* @param systemId The declared system identifier of the entity.
* @exception SAXException The application may raise an exception.
* @see #internalEntityDecl
* @see org.xml.sax.DTDHandler#unparsedEntityDecl
*/
public abstract void externalEntityDecl (String name, String publicId,
String systemId)
throws SAXException;
}
// end of DeclHandler.java
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