contenthandler.java

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     * and the <var>http://xml.org/sax/features/namespace-prefixes</var>
     * properties:</p>
     *
     * <ul>
     * <li>the Namespace URI and local name are required when 
     * the namespaces property is <var>true</var> (the default), and are
     * optional when the namespaces property is <var>false</var> (if one is
     * specified, both must be);</li>
     * <li>the qualified name is required when the namespace-prefixes property
     * is <var>true</var>, and is optional when the namespace-prefixes property
     * is <var>false</var> (the default).</li>
     * </ul>
     *
     * <p>Note that the attribute list provided will contain only
     * attributes with explicit values (specified or defaulted):
     * #IMPLIED attributes will be omitted.  The attribute list
     * will contain attributes used for Namespace declarations
     * (xmlns* attributes) only if the
     * <code>http://xml.org/sax/features/namespace-prefixes</code>
     * property is true (it is false by default, and support for a 
     * true value is optional).</p>
     *
     * <p>Like {@link #characters characters()}, attribute values may have
     * characters that need more than one <code>char</code> value.  </p>
     *
     * @param uri The Namespace URI, or the empty string if the
     *        element has no Namespace URI or if Namespace
     *        processing is not being performed.
     * @param localName The local name (without prefix), or the
     *        empty string if Namespace processing is not being
     *        performed.
     * @param qName The qualified name (with prefix), or the
     *        empty string if qualified names are not available.
     * @param atts The attributes attached to the element.  If
     *        there are no attributes, it shall be an empty
     *        Attributes object.
     * @exception org.xml.sax.SAXException Any SAX exception, possibly
     *            wrapping another exception.
     * @see #endElement(String, String, String)
     * @see org.xml.sax.Attributes
     */
    public void startElement (String uri, String localName,
			      String qName, Attributes atts)
	throws SAXException;


    /**
     * Receive notification of the end of an element.
     *
     * <p>The SAX parser will invoke this method at the end of every
     * element in the XML document; there will be a corresponding
     * {@link #startElement startElement} event for every endElement 
     * event (even when the element is empty).</p>
     *
     * <p>For information on the names, see startElement.</p>
     *
     * @param uri The Namespace URI, or the empty string if the
     *        element has no Namespace URI or if Namespace
     *        processing is not being performed.
     * @param localName The local name (without prefix), or the
     *        empty string if Namespace processing is not being
     *        performed.
     * @param qName The qualified XML 1.0 name (with prefix), or the
     *        empty string if qualified names are not available.
     * @exception org.xml.sax.SAXException Any SAX exception, possibly
     *            wrapping another exception.
     */
    public void endElement (String uri, String localName,
			    String qName)
	throws SAXException;


    /**
     * Receive notification of character data.
     *
     * <p>The Parser will call this method to report each chunk of
     * character data.  SAX parsers may return all contiguous character
     * data in a single chunk, or they may split it into several
     * chunks; however, all of the characters in any single event
     * must come from the same external entity so that the Locator
     * provides useful information.</p>
     *
     * <p>The application must not attempt to read from the array
     * outside of the specified range.</p>
     *
     * <p>Individual characters may consist of more than one Java
     * <code>char</code> value.  There are two important cases where this
     * happens, because characters can't be represented in just sixteen bits.
     * In one case, characters are represented in a <em>Surrogate Pair</em>,
     * using two special Unicode values. Such characters are in the so-called
     * "Astral Planes", with a code point above U+FFFF.  A second case involves
     * composite characters, such as a base character combining with one or
     * more accent characters. </p>
     *
     * <p> Your code should not assume that algorithms using
     * <code>char</code>-at-a-time idioms will be working in character
     * units; in some cases they will split characters.  This is relevant
     * wherever XML permits arbitrary characters, such as attribute values,
     * processing instruction data, and comments as well as in data reported
     * from this method.  It's also generally relevant whenever Java code
     * manipulates internationalized text; the issue isn't unique to XML.</p>
     *
     * <p>Note that some parsers will report whitespace in element
     * content using the {@link #ignorableWhitespace ignorableWhitespace}
     * method rather than this one (validating parsers <em>must</em> 
     * do so).</p>
     *
     * @param ch The characters from the XML document.
     * @param start The start position in the array.
     * @param length The number of characters to read from the array.
     * @exception org.xml.sax.SAXException Any SAX exception, possibly
     *            wrapping another exception.
     * @see #ignorableWhitespace(char[], int, int) 
     * @see org.xml.sax.Locator
     */
    public void characters (char ch[], int start, int length)
	throws SAXException;


    /**
     * Receive notification of ignorable whitespace in element content.
     *
     * <p>Validating Parsers must use this method to report each chunk
     * of whitespace in element content (see the W3C XML 1.0 recommendation,
     * section 2.10): non-validating parsers may also use this method
     * if they are capable of parsing and using content models.</p>
     *
     * <p>SAX parsers may return all contiguous whitespace in a single
     * chunk, or they may split it into several chunks; however, all of
     * the characters in any single event must come from the same
     * external entity, so that the Locator provides useful
     * information.</p>
     *
     * <p>The application must not attempt to read from the array
     * outside of the specified range.</p>
     *
     * @param ch The characters from the XML document.
     * @param start The start position in the array.
     * @param length The number of characters to read from the array.
     * @exception org.xml.sax.SAXException Any SAX exception, possibly
     *            wrapping another exception.
     * @see #characters(char[], int, int)
     */
    public void ignorableWhitespace (char ch[], int start, int length)
	throws SAXException;


    /**
     * Receive notification of a processing instruction.
     *
     * <p>The Parser will invoke this method once for each processing
     * instruction found: note that processing instructions may occur
     * before or after the main document element.</p>
     *
     * <p>A SAX parser must never report an XML declaration (XML 1.0,
     * section 2.8) or a text declaration (XML 1.0, section 4.3.1)
     * using this method.</p>
     *
     * <p>Like {@link #characters characters()}, processing instruction
     * data may have characters that need more than one <code>char</code>
     * value. </p>
     *
     * @param target The processing instruction target.
     * @param data The processing instruction data, or null if
     *        none was supplied.  The data does not include any
     *        whitespace separating it from the target.
     * @exception org.xml.sax.SAXException Any SAX exception, possibly
     *            wrapping another exception.
     */
    public void processingInstruction (String target, String data)
	throws SAXException;


    /**
     * Receive notification of a skipped entity.
     * This is not called for entity references within markup constructs
     * such as element start tags or markup declarations.  (The XML
     * recommendation requires reporting skipped external entities.
     * SAX also reports internal entity expansion/non-expansion, except
     * within markup constructs.)
     *
     * <p>The Parser will invoke this method each time the entity is
     * skipped.  Non-validating processors may skip entities if they
     * have not seen the declarations (because, for example, the
     * entity was declared in an external DTD subset).  All processors
     * may skip external entities, depending on the values of the
     * <code>http://xml.org/sax/features/external-general-entities</code>
     * and the
     * <code>http://xml.org/sax/features/external-parameter-entities</code>
     * properties.</p>
     *
     * @param name The name of the skipped entity.  If it is a 
     *        parameter entity, the name will begin with '%', and if
     *        it is the external DTD subset, it will be the string
     *        "[dtd]".
     * @exception org.xml.sax.SAXException Any SAX exception, possibly
     *            wrapping another exception.
     */
    public void skippedEntity (String name)
	throws SAXException;
}

// end of ContentHandler.java