mirror of git://gcc.gnu.org/git/gcc.git
968 lines
33 KiB
Java
968 lines
33 KiB
Java
/* DomConsumer.java --
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Copyright (C) 1999,2000,2001 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.xml.pipeline;
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import gnu.xml.util.DomParser;
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import org.xml.sax.Attributes;
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import org.xml.sax.ContentHandler;
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import org.xml.sax.DTDHandler;
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import org.xml.sax.ErrorHandler;
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import org.xml.sax.Locator;
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import org.xml.sax.SAXException;
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import org.xml.sax.SAXNotRecognizedException;
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import org.xml.sax.SAXParseException;
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import org.xml.sax.ext.DeclHandler;
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import org.xml.sax.ext.LexicalHandler;
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import org.xml.sax.helpers.AttributesImpl;
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import org.w3c.dom.Attr;
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import org.w3c.dom.CDATASection;
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import org.w3c.dom.CharacterData;
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import org.w3c.dom.Document;
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import org.w3c.dom.DOMImplementation;
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import org.w3c.dom.Element;
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import org.w3c.dom.EntityReference;
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import org.w3c.dom.Node;
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import org.w3c.dom.ProcessingInstruction;
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import org.w3c.dom.Text;
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/**
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* This consumer builds a DOM Document from its input, acting either as a
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* pipeline terminus or as an intermediate buffer. When a document's worth
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* of events has been delivered to this consumer, that document is read with
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* a {@link DomParser} and sent to the next consumer. It is also available
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* as a read-once property.
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*
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* <p>The DOM tree is constructed as faithfully as possible. There are some
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* complications since a DOM should expose behaviors that can't be implemented
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* without API backdoors into that DOM, and because some SAX parsers don't
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* report all the information that DOM permits to be exposed. The general
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* problem areas involve information from the Document Type Declaration (DTD).
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* DOM only represents a limited subset, but has some behaviors that depend
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* on much deeper knowledge of a document's DTD. You shouldn't have much to
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* worry about unless you change handling of "noise" nodes from its default
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* setting (which ignores them all); note if you use JAXP to populate your
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* DOM trees, it wants to save "noise" nodes by default. (Such nodes include
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* ignorable whitespace, comments, entity references and CDATA boundaries.)
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* Otherwise, your
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* main worry will be if you use a SAX parser that doesn't flag ignorable
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* whitespace unless it's validating (few don't).
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*
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* <p> The SAX2 events used as input must contain XML Names for elements
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* and attributes, with original prefixes. In SAX2,
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* this is optional unless the "namespace-prefixes" parser feature is set.
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* Moreover, many application components won't provide completely correct
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* structures anyway. <em>Before you convert a DOM to an output document,
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* you should plan to postprocess it to create or repair such namespace
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* information.</em> The {@link NSFilter} pipeline stage does such work.
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*
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* <p> <em>Note: changes late in DOM L2 process made it impractical to
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* attempt to create the DocumentType node in any implementation-neutral way,
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* much less to populate it (L1 didn't support even creating such nodes).
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* To create and populate such a node, subclass the inner
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* {@link DomConsumer.Handler} class and teach it about the backdoors into
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* whatever DOM implementation you want. It's possible that some revised
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* DOM API (L3?) will make this problem solvable again. </em>
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*
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* @see DomParser
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*
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* @author David Brownell
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*/
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public class DomConsumer implements EventConsumer
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{
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private Class domImpl;
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private boolean hidingCDATA = true;
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private boolean hidingComments = true;
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private boolean hidingWhitespace = true;
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private boolean hidingReferences = true;
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private Handler handler;
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private ErrorHandler errHandler;
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private EventConsumer next;
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// FIXME: this can't be a generic pipeline stage just now,
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// since its input became a Class not a String (to be turned
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// into a class, using the right class loader)
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/**
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* Configures this pipeline terminus to use the specified implementation
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* of DOM when constructing its result value.
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*
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* @param impl class implementing {@link org.w3c.dom.Document Document}
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* which publicly exposes a default constructor
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*
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* @exception SAXException when there is a problem creating an
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* empty DOM document using the specified implementation
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*/
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public DomConsumer (Class impl)
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throws SAXException
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{
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domImpl = impl;
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handler = new Handler (this);
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}
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/**
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* This is the hook through which a subclass provides a handler
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* which knows how to access DOM extensions, specific to some
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* implementation, to record additional data in a DOM.
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* Treat this as part of construction; don't call it except
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* before (or between) parses.
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*/
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protected void setHandler (Handler h)
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{
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handler = h;
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}
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private Document emptyDocument ()
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throws SAXException
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{
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try {
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return (Document) domImpl.newInstance ();
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} catch (IllegalAccessException e) {
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throw new SAXException ("can't access constructor: "
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+ e.getMessage ());
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} catch (InstantiationException e) {
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throw new SAXException ("can't instantiate Document: "
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+ e.getMessage ());
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}
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}
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/**
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* Configures this consumer as a buffer/filter, using the specified
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* DOM implementation when constructing its result value.
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*
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* <p> This event consumer acts as a buffer and filter, in that it
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* builds a DOM tree and then writes it out when <em>endDocument</em>
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* is invoked. Because of the limitations of DOM, much information
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* will as a rule not be seen in that replay. To get a full fidelity
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* copy of the input event stream, use a {@link TeeConsumer}.
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*
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* @param impl class implementing {@link org.w3c.dom.Document Document}
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* which publicly exposes a default constructor
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* @param next receives a "replayed" sequence of parse events when
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* the <em>endDocument</em> method is invoked.
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*
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* @exception SAXException when there is a problem creating an
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* empty DOM document using the specified DOM implementation
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*/
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public DomConsumer (Class impl, EventConsumer n)
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throws SAXException
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{
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this (impl);
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next = n;
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}
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/**
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* Returns the document constructed from the preceding
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* sequence of events. This method should not be
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* used again until another sequence of events has been
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* given to this EventConsumer.
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*/
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final public Document getDocument ()
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{
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return handler.clearDocument ();
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}
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public void setErrorHandler (ErrorHandler handler)
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{
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errHandler = handler;
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}
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/**
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* Returns true if the consumer is hiding entity references nodes
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* (the default), and false if EntityReference nodes should
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* instead be created. Such EntityReference nodes will normally be
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* empty, unless an implementation arranges to populate them and then
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* turn them back into readonly objects.
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*
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* @see #setHidingReferences
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*/
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final public boolean isHidingReferences ()
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{ return hidingReferences; }
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/**
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* Controls whether the consumer will hide entity expansions,
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* or will instead mark them with entity reference nodes.
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*
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* @see #isHidingReferences
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* @param flag False if entity reference nodes will appear
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*/
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final public void setHidingReferences (boolean flag)
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{ hidingReferences = flag; }
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/**
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* Returns true if the consumer is hiding comments (the default),
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* and false if they should be placed into the output document.
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*
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* @see #setHidingComments
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*/
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public final boolean isHidingComments ()
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{ return hidingComments; }
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/**
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* Controls whether the consumer is hiding comments.
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*
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* @see #isHidingComments
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*/
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public final void setHidingComments (boolean flag)
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{ hidingComments = flag; }
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/**
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* Returns true if the consumer is hiding ignorable whitespace
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* (the default), and false if such whitespace should be placed
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* into the output document as children of element nodes.
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*
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* @see #setHidingWhitespace
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*/
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public final boolean isHidingWhitespace ()
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{ return hidingWhitespace; }
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/**
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* Controls whether the consumer hides ignorable whitespace
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*
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* @see #isHidingComments
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*/
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public final void setHidingWhitespace (boolean flag)
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{ hidingWhitespace = flag; }
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/**
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* Returns true if the consumer is saving CDATA boundaries, or
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* false (the default) otherwise.
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*
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* @see #setHidingCDATA
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*/
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final public boolean isHidingCDATA ()
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{ return hidingCDATA; }
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/**
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* Controls whether the consumer will save CDATA boundaries.
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*
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* @see #isHidingCDATA
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* @param flag True to treat CDATA text differently from other
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* text nodes
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*/
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final public void setHidingCDATA (boolean flag)
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{ hidingCDATA = flag; }
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/** Returns the document handler being used. */
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final public ContentHandler getContentHandler ()
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{ return handler; }
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/** Returns the DTD handler being used. */
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final public DTDHandler getDTDHandler ()
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{ return handler; }
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/**
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* Returns the lexical handler being used.
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* (DOM construction can't really use declaration handlers.)
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*/
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final public Object getProperty (String id)
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throws SAXNotRecognizedException
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{
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if ("http://xml.org/sax/properties/lexical-handler".equals (id))
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return handler;
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if ("http://xml.org/sax/properties/declaration-handler".equals (id))
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return handler;
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throw new SAXNotRecognizedException (id);
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}
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EventConsumer getNext () { return next; }
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ErrorHandler getErrorHandler () { return errHandler; }
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/**
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* Class used to intercept various parsing events and use them to
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* populate a DOM document. Subclasses would typically know and use
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* backdoors into specific DOM implementations, used to implement
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* DTD-related functionality.
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*
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* <p> Note that if this ever throws a DOMException (runtime exception)
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* that will indicate a bug in the DOM (e.g. doesn't support something
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* per specification) or the parser (e.g. emitted an illegal name, or
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* accepted illegal input data). </p>
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*/
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public static class Handler
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implements ContentHandler, LexicalHandler,
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DTDHandler, DeclHandler
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{
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protected DomConsumer consumer;
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private DOMImplementation impl;
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private Document document;
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private boolean isL2;
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private Locator locator;
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private Node top;
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private boolean inCDATA;
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private boolean mergeCDATA;
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private boolean inDTD;
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private String currentEntity;
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private boolean recreatedAttrs;
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private AttributesImpl attributes = new AttributesImpl ();
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/**
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* Subclasses may use SAX2 events to provide additional
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* behaviors in the resulting DOM.
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*/
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protected Handler (DomConsumer consumer)
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throws SAXException
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{
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this.consumer = consumer;
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document = consumer.emptyDocument ();
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impl = document.getImplementation ();
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isL2 = impl.hasFeature ("XML", "2.0");
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}
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private void fatal (String message, Exception x)
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throws SAXException
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{
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SAXParseException e;
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ErrorHandler errHandler = consumer.getErrorHandler ();
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if (locator == null)
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e = new SAXParseException (message, null, null, -1, -1, x);
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else
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e = new SAXParseException (message, locator, x);
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if (errHandler != null)
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errHandler.fatalError (e);
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throw e;
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}
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/**
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* Returns and forgets the document produced. If the handler is
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* reused, a new document may be created.
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*/
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Document clearDocument ()
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{
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Document retval = document;
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document = null;
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locator = null;
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return retval;
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}
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/**
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* Returns the document under construction.
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*/
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protected Document getDocument ()
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{ return document; }
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/**
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* Returns the current node being populated. This is usually
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* an Element or Document, but it might be an EntityReference
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* node if some implementation-specific code knows how to put
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* those into the result tree and later mark them as readonly.
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*/
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protected Node getTop ()
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{ return top; }
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// SAX1
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public void setDocumentLocator (Locator locator)
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{
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this.locator = locator;
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}
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// SAX1
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public void startDocument ()
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throws SAXException
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{
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if (document == null)
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try {
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if (isL2) {
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// couple to original implementation
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document = impl.createDocument (null, "foo", null);
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document.removeChild (document.getFirstChild ());
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} else {
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document = consumer.emptyDocument ();
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}
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} catch (Exception e) {
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fatal ("DOM create document", e);
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}
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top = document;
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}
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// SAX1
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public void endDocument ()
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throws SAXException
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{
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try {
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if (consumer.getNext () != null && document != null) {
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DomParser parser = new DomParser (document);
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EventFilter.bind (parser, consumer.getNext ());
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parser.parse ("ignored");
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}
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} finally {
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top = null;
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}
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}
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// SAX1
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public void processingInstruction (String target, String data)
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throws SAXException
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{
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// we can't create populated entity ref nodes using
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// only public DOM APIs (they've got to be readonly)
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if (currentEntity != null)
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return;
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ProcessingInstruction pi;
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if (isL2
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// && consumer.isUsingNamespaces ()
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&& target.indexOf (':') != -1)
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namespaceError (
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"PI target name is namespace nonconformant: "
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+ target);
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if (inDTD)
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return;
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pi = document.createProcessingInstruction (target, data);
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top.appendChild (pi);
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}
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/**
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* Subclasses may overrride this method to provide a more efficient
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* way to construct text nodes.
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* Typically, copying the text into a single character array will
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* be more efficient than doing that as well as allocating other
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* needed for a String, including an internal StringBuffer.
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* Those additional memory and CPU costs can be incurred later,
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* if ever needed.
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* Unfortunately the standard DOM factory APIs encourage those costs
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* to be incurred early.
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*/
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protected Text createText (
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boolean isCDATA,
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char ch [],
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int start,
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int length
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) {
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String value = new String (ch, start, length);
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if (isCDATA)
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return document.createCDATASection (value);
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else
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return document.createTextNode (value);
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}
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// SAX1
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public void characters (char ch [], int start, int length)
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throws SAXException
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{
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// we can't create populated entity ref nodes using
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// only public DOM APIs (they've got to be readonly
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// at creation time)
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if (currentEntity != null)
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return;
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Node lastChild = top.getLastChild ();
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// merge consecutive text or CDATA nodes if appropriate.
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if (lastChild instanceof Text) {
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if (consumer.isHidingCDATA ()
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// consecutive Text content ... always merge
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|| (!inCDATA
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&& !(lastChild instanceof CDATASection))
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// consecutive CDATASection content ... don't
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// merge between sections, only within them
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|| (inCDATA && mergeCDATA
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&& lastChild instanceof CDATASection)
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) {
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CharacterData last = (CharacterData) lastChild;
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String value = new String (ch, start, length);
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last.appendData (value);
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return;
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}
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}
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if (inCDATA && !consumer.isHidingCDATA ()) {
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top.appendChild (createText (true, ch, start, length));
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mergeCDATA = true;
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} else
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top.appendChild (createText (false, ch, start, length));
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}
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// SAX2
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public void skippedEntity (String name)
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throws SAXException
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{
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|
// this callback is useless except to report errors, since
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// we can't know if the ref was in content, within an
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// attribute, within a declaration ... only one of those
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// cases supports more intelligent action than a panic.
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fatal ("skipped entity: " + name, null);
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}
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// SAX2
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|
public void startPrefixMapping (String prefix, String uri)
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throws SAXException
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{
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|
// reconstruct "xmlns" attributes deleted by all
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|
// SAX2 parsers without "namespace-prefixes" = true
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|
if ("".equals (prefix))
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attributes.addAttribute ("", "", "xmlns",
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"CDATA", uri);
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else
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attributes.addAttribute ("", "", "xmlns:" + prefix,
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"CDATA", uri);
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recreatedAttrs = true;
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}
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|
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// SAX2
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|
public void endPrefixMapping (String prefix)
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throws SAXException
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|
{ }
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// SAX2
|
|
public void startElement (
|
|
String uri,
|
|
String localName,
|
|
String qName,
|
|
Attributes atts
|
|
) throws SAXException
|
|
{
|
|
// we can't create populated entity ref nodes using
|
|
// only public DOM APIs (they've got to be readonly)
|
|
if (currentEntity != null)
|
|
return;
|
|
|
|
// parser discarded basic information; DOM tree isn't writable
|
|
// without massaging to assign prefixes to all nodes.
|
|
// the "NSFilter" class does that massaging.
|
|
if (qName.length () == 0)
|
|
qName = localName;
|
|
|
|
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|
Element element;
|
|
int length = atts.getLength ();
|
|
|
|
if (!isL2) {
|
|
element = document.createElement (qName);
|
|
|
|
// first the explicit attributes ...
|
|
length = atts.getLength ();
|
|
for (int i = 0; i < length; i++)
|
|
element.setAttribute (atts.getQName (i),
|
|
atts.getValue (i));
|
|
// ... then any recreated ones (DOM deletes duplicates)
|
|
if (recreatedAttrs) {
|
|
recreatedAttrs = false;
|
|
length = attributes.getLength ();
|
|
for (int i = 0; i < length; i++)
|
|
element.setAttribute (attributes.getQName (i),
|
|
attributes.getValue (i));
|
|
attributes.clear ();
|
|
}
|
|
|
|
top.appendChild (element);
|
|
top = element;
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|
return;
|
|
}
|
|
|
|
// For an L2 DOM when namespace use is enabled, use
|
|
// createElementNS/createAttributeNS except when
|
|
// (a) it's an element in the default namespace, or
|
|
// (b) it's an attribute with no prefix
|
|
String namespace;
|
|
|
|
if (localName.length () != 0)
|
|
namespace = (uri.length () == 0) ? null : uri;
|
|
else
|
|
namespace = getNamespace (getPrefix (qName), atts);
|
|
|
|
if (namespace == null)
|
|
element = document.createElement (qName);
|
|
else
|
|
element = document.createElementNS (namespace, qName);
|
|
|
|
populateAttributes (element, atts);
|
|
if (recreatedAttrs) {
|
|
recreatedAttrs = false;
|
|
// ... DOM deletes any duplicates
|
|
populateAttributes (element, attributes);
|
|
attributes.clear ();
|
|
}
|
|
|
|
top.appendChild (element);
|
|
top = element;
|
|
}
|
|
|
|
final static String xmlnsURI = "http://www.w3.org/2000/xmlns/";
|
|
|
|
private void populateAttributes (Element element, Attributes attrs)
|
|
throws SAXParseException
|
|
{
|
|
int length = attrs.getLength ();
|
|
|
|
for (int i = 0; i < length; i++) {
|
|
String type = attrs.getType (i);
|
|
String value = attrs.getValue (i);
|
|
String name = attrs.getQName (i);
|
|
String local = attrs.getLocalName (i);
|
|
String uri = attrs.getURI (i);
|
|
|
|
// parser discarded basic information, DOM tree isn't writable
|
|
if (name.length () == 0)
|
|
name = local;
|
|
|
|
// all attribute types other than these three may not
|
|
// contain scoped names... enumerated attributes get
|
|
// reported as NMTOKEN, except for NOTATION values
|
|
if (!("CDATA".equals (type)
|
|
|| "NMTOKEN".equals (type)
|
|
|| "NMTOKENS".equals (type))) {
|
|
if (value.indexOf (':') != -1) {
|
|
namespaceError (
|
|
"namespace nonconformant attribute value: "
|
|
+ "<" + element.getNodeName ()
|
|
+ " " + name + "='" + value + "' ...>");
|
|
}
|
|
}
|
|
|
|
// xmlns="" is legal (undoes default NS)
|
|
// xmlns:foo="" is illegal
|
|
String prefix = getPrefix (name);
|
|
String namespace;
|
|
|
|
if ("xmlns".equals (prefix)) {
|
|
if ("".equals (value))
|
|
namespaceError ("illegal null namespace decl, " + name);
|
|
namespace = xmlnsURI;
|
|
} else if ("xmlns".equals (name))
|
|
namespace = xmlnsURI;
|
|
|
|
else if (prefix == null)
|
|
namespace = null;
|
|
else if (!"".equals(uri) && uri.length () != 0)
|
|
namespace = uri;
|
|
else
|
|
namespace = getNamespace (prefix, attrs);
|
|
|
|
if (namespace == null)
|
|
element.setAttribute (name, value);
|
|
else
|
|
element.setAttributeNS (namespace, name, value);
|
|
}
|
|
}
|
|
|
|
private String getPrefix (String name)
|
|
{
|
|
int temp;
|
|
|
|
if ((temp = name.indexOf (':')) > 0)
|
|
return name.substring (0, temp);
|
|
return null;
|
|
}
|
|
|
|
// used with SAX1-level parser output
|
|
private String getNamespace (String prefix, Attributes attrs)
|
|
throws SAXParseException
|
|
{
|
|
String namespace;
|
|
String decl;
|
|
|
|
// defaulting
|
|
if (prefix == null) {
|
|
decl = "xmlns";
|
|
namespace = attrs.getValue (decl);
|
|
if ("".equals (namespace))
|
|
return null;
|
|
else if (namespace != null)
|
|
return namespace;
|
|
|
|
// "xmlns" is like a keyword
|
|
// ... according to the Namespace REC, but DOM L2 CR2+
|
|
// and Infoset violate that by assigning a namespace.
|
|
// that conflict is resolved elsewhere.
|
|
} else if ("xmlns".equals (prefix))
|
|
return null;
|
|
|
|
// "xml" prefix is fixed
|
|
else if ("xml".equals (prefix))
|
|
return "http://www.w3.org/XML/1998/namespace";
|
|
|
|
// otherwise, expect a declaration
|
|
else {
|
|
decl = "xmlns:" + prefix;
|
|
namespace = attrs.getValue (decl);
|
|
}
|
|
|
|
// if we found a local declaration, great
|
|
if (namespace != null)
|
|
return namespace;
|
|
|
|
|
|
// ELSE ... search up the tree we've been building
|
|
for (Node n = top;
|
|
n != null && n.getNodeType () != Node.DOCUMENT_NODE;
|
|
n = n.getParentNode ()) {
|
|
if (n.getNodeType () == Node.ENTITY_REFERENCE_NODE)
|
|
continue;
|
|
Element e = (Element) n;
|
|
Attr attr = e.getAttributeNode (decl);
|
|
if (attr != null)
|
|
return attr.getNodeValue ();
|
|
}
|
|
// see above re "xmlns" as keyword
|
|
if ("xmlns".equals (decl))
|
|
return null;
|
|
|
|
namespaceError ("Undeclared namespace prefix: " + prefix);
|
|
return null;
|
|
}
|
|
|
|
// SAX2
|
|
public void endElement (String uri, String localName, String qName)
|
|
throws SAXException
|
|
{
|
|
// we can't create populated entity ref nodes using
|
|
// only public DOM APIs (they've got to be readonly)
|
|
if (currentEntity != null)
|
|
return;
|
|
|
|
top = top.getParentNode ();
|
|
}
|
|
|
|
// SAX1 (mandatory reporting if validating)
|
|
public void ignorableWhitespace (char ch [], int start, int length)
|
|
throws SAXException
|
|
{
|
|
if (consumer.isHidingWhitespace ())
|
|
return;
|
|
characters (ch, start, length);
|
|
}
|
|
|
|
// SAX2 lexical event
|
|
public void startCDATA ()
|
|
throws SAXException
|
|
{
|
|
inCDATA = true;
|
|
// true except for the first fragment of a cdata section
|
|
mergeCDATA = false;
|
|
}
|
|
|
|
// SAX2 lexical event
|
|
public void endCDATA ()
|
|
throws SAXException
|
|
{
|
|
inCDATA = false;
|
|
}
|
|
|
|
// SAX2 lexical event
|
|
//
|
|
// this SAX2 callback merges two unrelated things:
|
|
// - Declaration of the root element type ... belongs with
|
|
// the other DTD declaration methods, NOT HERE.
|
|
// - IDs for the optional external subset ... belongs here
|
|
// with other lexical information.
|
|
//
|
|
// ...and it doesn't include the internal DTD subset, desired
|
|
// both to support DOM L2 and to enable "pass through" processing
|
|
//
|
|
public void startDTD (String name, String publicId, String SystemId)
|
|
throws SAXException
|
|
{
|
|
// need to filter out comments and PIs within the DTD
|
|
inDTD = true;
|
|
}
|
|
|
|
// SAX2 lexical event
|
|
public void endDTD ()
|
|
throws SAXException
|
|
{
|
|
inDTD = false;
|
|
}
|
|
|
|
// SAX2 lexical event
|
|
public void comment (char ch [], int start, int length)
|
|
throws SAXException
|
|
{
|
|
Node comment;
|
|
|
|
// we can't create populated entity ref nodes using
|
|
// only public DOM APIs (they've got to be readonly)
|
|
if (consumer.isHidingComments ()
|
|
|| inDTD
|
|
|| currentEntity != null)
|
|
return;
|
|
comment = document.createComment (new String (ch, start, length));
|
|
top.appendChild (comment);
|
|
}
|
|
|
|
/**
|
|
* May be overridden by subclasses to return true, indicating
|
|
* that entity reference nodes can be populated and then made
|
|
* read-only.
|
|
*/
|
|
public boolean canPopulateEntityRefs ()
|
|
{ return false; }
|
|
|
|
// SAX2 lexical event
|
|
public void startEntity (String name)
|
|
throws SAXException
|
|
{
|
|
// are we ignoring what would be contents of an
|
|
// entity ref, since we can't populate it?
|
|
if (currentEntity != null)
|
|
return;
|
|
|
|
// Are we hiding all entity boundaries?
|
|
if (consumer.isHidingReferences ())
|
|
return;
|
|
|
|
// SAX2 shows parameter entities; DOM hides them
|
|
if (name.charAt (0) == '%' || "[dtd]".equals (name))
|
|
return;
|
|
|
|
// Since we can't create a populated entity ref node in any
|
|
// standard way, we create an unpopulated one.
|
|
EntityReference ref = document.createEntityReference (name);
|
|
top.appendChild (ref);
|
|
top = ref;
|
|
|
|
// ... allowing subclasses to populate them
|
|
if (!canPopulateEntityRefs ())
|
|
currentEntity = name;
|
|
}
|
|
|
|
// SAX2 lexical event
|
|
public void endEntity (String name)
|
|
throws SAXException
|
|
{
|
|
if (name.charAt (0) == '%' || "[dtd]".equals (name))
|
|
return;
|
|
if (name.equals (currentEntity))
|
|
currentEntity = null;
|
|
if (!consumer.isHidingReferences ())
|
|
top = top.getParentNode ();
|
|
}
|
|
|
|
|
|
// SAX1 DTD event
|
|
public void notationDecl (
|
|
String name,
|
|
String publicId, String SystemId
|
|
) throws SAXException
|
|
{
|
|
/* IGNORE -- no public DOM API lets us store these
|
|
* into the doctype node
|
|
*/
|
|
}
|
|
|
|
// SAX1 DTD event
|
|
public void unparsedEntityDecl (
|
|
String name,
|
|
String publicId, String SystemId,
|
|
String notationName
|
|
) throws SAXException
|
|
{
|
|
/* IGNORE -- no public DOM API lets us store these
|
|
* into the doctype node
|
|
*/
|
|
}
|
|
|
|
// SAX2 declaration event
|
|
public void elementDecl (String name, String model)
|
|
throws SAXException
|
|
{
|
|
/* IGNORE -- no content model support in DOM L2 */
|
|
}
|
|
|
|
// SAX2 declaration event
|
|
public void attributeDecl (
|
|
String eName,
|
|
String aName,
|
|
String type,
|
|
String mode,
|
|
String value
|
|
) throws SAXException
|
|
{
|
|
/* IGNORE -- no attribute model support in DOM L2 */
|
|
}
|
|
|
|
// SAX2 declaration event
|
|
public void internalEntityDecl (String name, String value)
|
|
throws SAXException
|
|
{
|
|
/* IGNORE -- no public DOM API lets us store these
|
|
* into the doctype node
|
|
*/
|
|
}
|
|
|
|
// SAX2 declaration event
|
|
public void externalEntityDecl (
|
|
String name,
|
|
String publicId,
|
|
String SystemId
|
|
) throws SAXException
|
|
{
|
|
/* IGNORE -- no public DOM API lets us store these
|
|
* into the doctype node
|
|
*/
|
|
}
|
|
|
|
//
|
|
// These really should offer the option of nonfatal handling,
|
|
// like other validity errors, though that would cause major
|
|
// chaos in the DOM data structures. DOM is already spec'd
|
|
// to treat many of these as fatal, so this is consistent.
|
|
//
|
|
private void namespaceError (String description)
|
|
throws SAXParseException
|
|
{
|
|
SAXParseException err;
|
|
|
|
err = new SAXParseException (description, locator);
|
|
throw err;
|
|
}
|
|
}
|
|
}
|