mirror of git://gcc.gnu.org/git/gcc.git
805 lines
29 KiB
Java
805 lines
29 KiB
Java
/* DomParser.java --
|
|
Copyright (C) 1999,2000,2001 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU Classpath.
|
|
|
|
GNU Classpath is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
GNU Classpath is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GNU Classpath; see the file COPYING. If not, write to the
|
|
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
02110-1301 USA.
|
|
|
|
Linking this library statically or dynamically with other modules is
|
|
making a combined work based on this library. Thus, the terms and
|
|
conditions of the GNU General Public License cover the whole
|
|
combination.
|
|
|
|
As a special exception, the copyright holders of this library give you
|
|
permission to link this library with independent modules to produce an
|
|
executable, regardless of the license terms of these independent
|
|
modules, and to copy and distribute the resulting executable under
|
|
terms of your choice, provided that you also meet, for each linked
|
|
independent module, the terms and conditions of the license of that
|
|
module. An independent module is a module which is not derived from
|
|
or based on this library. If you modify this library, you may extend
|
|
this exception to your version of the library, but you are not
|
|
obligated to do so. If you do not wish to do so, delete this
|
|
exception statement from your version. */
|
|
|
|
package gnu.xml.util;
|
|
|
|
import java.util.Enumeration;
|
|
import java.util.Locale;
|
|
|
|
import org.xml.sax.*;
|
|
import org.xml.sax.helpers.AttributesImpl;
|
|
import org.xml.sax.helpers.NamespaceSupport;
|
|
import org.xml.sax.ext.DeclHandler;
|
|
import org.xml.sax.ext.DefaultHandler2;
|
|
import org.xml.sax.ext.LexicalHandler;
|
|
|
|
import org.w3c.dom.*;
|
|
|
|
|
|
/**
|
|
* This parser emits SAX2 parsing events as it traverses a DOM tree, using
|
|
* any conformant implementation of DOM. It exposes all SAX1 features,
|
|
* and the following SAX2 features and properties (as
|
|
* identified by standard URIs which are not fully provided here). Note
|
|
* that if a Level 1 DOM implementation is given, then this behaves as if
|
|
* namespaces were disabled, and namespace prefixes were enabled. </p>
|
|
*
|
|
* <table border="1" width='100%' cellpadding='3' cellspacing='0'>
|
|
* <tr bgcolor='#ccccff'>
|
|
* <th><font size='+1'>Name</font></th>
|
|
* <th><font size='+1'>Notes</font></th></tr>
|
|
*
|
|
* <tr><td colspan=2><center><em>Features ... URL prefix is
|
|
* <b>http://xml.org/sax/features/</b></em></center></td></tr>
|
|
*
|
|
* <tr><td>(URL)/external-general-entities</td>
|
|
* <td>false (does no parsing)</td></tr>
|
|
* <tr><td>(URL)/external-parameter-entities</td>
|
|
* <td>false (does no parsing)</td></tr>
|
|
* <tr><td>(URL)/namespaces</td>
|
|
* <td>Value is fixed at <em>true</em></td></tr>
|
|
* <tr><td>(URL)/namespace-prefixes</td>
|
|
* <td>Value is settable, defaulting to <em>false</em>
|
|
* (<code>xmlns</code> attributes hidden, and names aren't prefixed)
|
|
* </td></tr>
|
|
* <tr><td>(URL)/string-interning</td>
|
|
* <td>Value is fixed at <em>false</em> (DOM provides no
|
|
* guarantees as to interning)</td></tr>
|
|
* <tr><td>(URL)/validation</td>
|
|
* <td>false (does no parsing)</td></tr>
|
|
* <tr><td>(URL)/lexical-handler/parameter-entities</td>
|
|
* <td>false (DOM doesn't do parameter entities)</td></tr>
|
|
*
|
|
* <tr><td colspan=2><center><em>Properties ... URL prefix is
|
|
* <b>http://xml.org/sax/properties/</b></em></center></td></tr>
|
|
*
|
|
*
|
|
* <tr><td>(URL)/dom-node</td>
|
|
* <td>This property may be set before parsing to hold a DOM
|
|
* <em>Document</em> node; any arguments given to <em>parse</em>
|
|
* methods are ignored. When retrieved
|
|
* during a parse, this value contains the "current" DOM node.
|
|
* </td></tr>
|
|
* <tr><td>(URL)/declaration-handler</td>
|
|
* <td>A declaration handler may be provided. Declaration of external
|
|
* general entities is exposed, but not parameter entities; none of the
|
|
* entity names reported here will begin with "%". </td></tr>
|
|
* <tr><td>(URL)/lexical-handler</td>
|
|
* <td>A lexical handler may be provided. While the start and end of
|
|
* any external subset are reported, expansion of other parameter
|
|
* entities (e.g. inside attribute list declarations) is not exposed.
|
|
* Expansion of general entities within attributes is also not exposed
|
|
* (see below).</td></tr>
|
|
* </table>
|
|
*
|
|
* <P> The consequences of modifying a DOM document tree as it is being walked
|
|
* by this "parser" are unspecified; don't do it! </P>
|
|
*
|
|
* @author David Brownell
|
|
*/
|
|
final public class DomParser implements XMLReader
|
|
{
|
|
// Stuff used internally to route events correctly
|
|
private DefaultHandler2 defaultHandler = new DefaultHandler2 ();
|
|
|
|
// per-parse SAX stuff
|
|
private ContentHandler contentHandler = defaultHandler;
|
|
private DTDHandler dtdHandler = defaultHandler;
|
|
private DeclHandler declHandler = defaultHandler;
|
|
private LexicalHandler lexicalHandler = defaultHandler;
|
|
|
|
// shared context
|
|
private ErrorHandler errHandler = defaultHandler;
|
|
private EntityResolver resolver = defaultHandler;
|
|
private Locale locale = Locale.getDefault ();
|
|
|
|
// parser state
|
|
private Node start;
|
|
private Node current;
|
|
private boolean isL2;
|
|
private boolean showNamespaces = true;
|
|
private boolean showXML1_0 = false;
|
|
private NamespaceSupport prefixStack = new NamespaceSupport ();
|
|
private boolean isDocument;
|
|
|
|
|
|
/**
|
|
* Constructs an unitialized <b>SAX2</b> parser.
|
|
*/
|
|
public DomParser () {
|
|
}
|
|
|
|
/**
|
|
* Constructs an <b>SAX2</b> parser initialized to traverse the specified
|
|
* DOM tree. If the node is a document, the startDocument() and
|
|
* endDocument() calls bracket the calls exposing children.
|
|
*/
|
|
public DomParser (Node node) {
|
|
setStart (node);
|
|
}
|
|
|
|
|
|
// stuff that most components in an application should be sharing:
|
|
// resolver and error locale.
|
|
|
|
/**
|
|
* <b>SAX2</b>: Returns the object used when resolving external
|
|
* entities during parsing (both general and parameter entities).
|
|
*/
|
|
public EntityResolver getEntityResolver ()
|
|
{
|
|
return resolver;
|
|
}
|
|
|
|
/**
|
|
* <b>SAX1</b>: Provides an object which may be used when resolving external
|
|
* entities during parsing (both general and parameter entities).
|
|
*/
|
|
public void setEntityResolver (EntityResolver resolver)
|
|
{
|
|
if (resolver == null)
|
|
resolver = defaultHandler;
|
|
this.resolver = resolver;
|
|
}
|
|
|
|
/**
|
|
* <b>SAX1</b>: Identifies the locale which the parser should use for the
|
|
* diagnostics it provides.
|
|
*
|
|
* @exception SAXException as defined in the specification for
|
|
* <em>org.xml.sax.Parser.setLocale()</em>
|
|
*/
|
|
public void setLocale (Locale locale)
|
|
throws SAXException
|
|
{
|
|
if (locale == null)
|
|
locale = Locale.getDefault ();
|
|
this.locale = locale;
|
|
}
|
|
|
|
|
|
// different modules will tend to handle error handling the same,
|
|
// but it may not be the same through the whole app
|
|
|
|
/**
|
|
* <b>SAX2</b>: Returns the object used to receive callbacks for XML
|
|
* errors of all levels (fatal, nonfatal, warning).
|
|
*/
|
|
public ErrorHandler getErrorHandler ()
|
|
{
|
|
return errHandler;
|
|
}
|
|
|
|
/**
|
|
* <b>SAX1</b>: Provides an object which receives callbacks for XML errors
|
|
* of all levels (fatal, nonfatal, warning).
|
|
*/
|
|
public void setErrorHandler (ErrorHandler handler)
|
|
{
|
|
if (handler == null)
|
|
handler = defaultHandler;
|
|
errHandler = handler;
|
|
}
|
|
|
|
|
|
// stuff different parts of a module will handle differently
|
|
|
|
/**
|
|
* <b>SAX2</b>: Returns the object used to report the logical
|
|
* content of an XML document.
|
|
*/
|
|
public ContentHandler getContentHandler ()
|
|
{
|
|
return contentHandler;
|
|
}
|
|
|
|
/**
|
|
* <b>SAX2</b>: Assigns the object used to report the logical
|
|
* content of an XML document.
|
|
*/
|
|
public void setContentHandler (ContentHandler handler)
|
|
{
|
|
if (handler == null)
|
|
handler = defaultHandler;
|
|
contentHandler = handler;
|
|
}
|
|
|
|
/**
|
|
* <b>SAX2</b>: Returns the object used to process declarations related
|
|
* to notations and unparsed entities.
|
|
*/
|
|
public DTDHandler getDTDHandler ()
|
|
{
|
|
return dtdHandler;
|
|
}
|
|
|
|
/**
|
|
* <b>SAX1</b>: Provides an object which may be used to intercept
|
|
* declarations related to notations and unparsed entities.
|
|
*/
|
|
public void setDTDHandler (DTDHandler handler)
|
|
{
|
|
if (handler == null)
|
|
handler = defaultHandler;
|
|
dtdHandler = handler;
|
|
}
|
|
|
|
|
|
/**
|
|
* <b>SAX1</b>: Parses the previously provided DOM document (the
|
|
* input parameter is ignored). When this returns, that same
|
|
* document may be parsed again without needing a "reset".
|
|
*
|
|
* @param uri ignored (pass an empty string)
|
|
* @exception SAXException as defined in the specification for
|
|
* <em>org.xml.sax.Parser.parse()</em>
|
|
*/
|
|
public void parse (String uri) throws SAXException
|
|
{
|
|
parse ();
|
|
}
|
|
|
|
/**
|
|
* <b>SAX1</b>: Parses the previously provided DOM document (the
|
|
* input parameter is ignored). When this returns, that same
|
|
* document may be parsed again without needing a "reset".
|
|
*
|
|
* @param input ignored
|
|
* @exception SAXException as defined in the specification for
|
|
* <em>org.xml.sax.Parser.parse()</em>
|
|
*/
|
|
public void parse (InputSource input) throws SAXException
|
|
{
|
|
parse ();
|
|
}
|
|
|
|
private void parse () throws SAXException
|
|
{
|
|
try {
|
|
walk ();
|
|
} finally {
|
|
if (isDocument)
|
|
contentHandler.endDocument ();
|
|
current = null;
|
|
prefixStack.reset ();
|
|
}
|
|
}
|
|
|
|
private boolean getIsL2 (Node node)
|
|
{
|
|
DOMImplementation impl;
|
|
Document doc;
|
|
|
|
if (node instanceof Document)
|
|
doc = (Document) node;
|
|
else
|
|
doc = node.getOwnerDocument ();
|
|
if (doc == null)
|
|
throw new RuntimeException ("? unowned node - L2 DTD ?");
|
|
impl = doc.getImplementation ();
|
|
return impl.hasFeature ("XML", "2.0");
|
|
}
|
|
|
|
|
|
private static final String FEATURES = "http://xml.org/sax/features/";
|
|
private static final String HANDLERS = "http://xml.org/sax/properties/";
|
|
|
|
/**
|
|
* <b>SAX2</b>: Tells whether this parser supports the specified feature.
|
|
*/
|
|
public boolean getFeature (String name)
|
|
throws SAXNotRecognizedException, SAXNotSupportedException
|
|
{
|
|
// basically, none are relevant -- they relate more to
|
|
// parsing than to walking a "parse tree".
|
|
|
|
// FIXME: DOM feature to expose interning?
|
|
|
|
if ((FEATURES + "validation").equals (name)
|
|
|| (FEATURES + "external-general-entities")
|
|
.equals (name)
|
|
|| (FEATURES + "external-parameter-entities")
|
|
.equals (name)
|
|
|| (FEATURES + "string-interning").equals (name)
|
|
)
|
|
return false;
|
|
|
|
if ((FEATURES + "namespaces").equals (name))
|
|
return showNamespaces;
|
|
if ((FEATURES + "namespace-prefixes").equals (name))
|
|
return showXML1_0;
|
|
|
|
throw new SAXNotRecognizedException (name);
|
|
}
|
|
|
|
/**
|
|
* <b>SAX2</b>: Returns the specified property. At this time only
|
|
* the declaration and lexical handlers, and current the "DOM" node,
|
|
* are supported.
|
|
*/
|
|
public Object getProperty (String name)
|
|
throws SAXNotRecognizedException, SAXNotSupportedException
|
|
{
|
|
if ((HANDLERS + "declaration-handler").equals (name))
|
|
return declHandler == defaultHandler ? null : declHandler;
|
|
if ((HANDLERS + "lexical-handler").equals (name))
|
|
return lexicalHandler == defaultHandler ? null : lexicalHandler;
|
|
|
|
if ((HANDLERS + "dom-node").equals (name))
|
|
return current;
|
|
|
|
// unknown properties
|
|
throw new SAXNotRecognizedException (name);
|
|
}
|
|
|
|
/**
|
|
* <b>SAX2</b>: Sets the state of features supported in this parser.
|
|
* Only the namespace support features are mutable.
|
|
*/
|
|
public void setFeature (String name, boolean state)
|
|
throws SAXNotRecognizedException, SAXNotSupportedException
|
|
{
|
|
if (current != null)
|
|
throw new IllegalStateException ("feature change midparse");
|
|
|
|
boolean value = getFeature (name);
|
|
|
|
if (value == state)
|
|
return;
|
|
|
|
if ((FEATURES + "namespaces").equals (name)) {
|
|
if (!showXML1_0 && state == false)
|
|
throw new SAXNotSupportedException ("Illegal namespace "
|
|
+ "processing configuration");
|
|
showNamespaces = state;
|
|
return;
|
|
}
|
|
if ((FEATURES + "namespace-prefixes").equals (name)) {
|
|
if (!showNamespaces && state == false)
|
|
throw new SAXNotSupportedException ("Illegal namespace "
|
|
+ "processing configuration");
|
|
showXML1_0 = state;
|
|
return;
|
|
}
|
|
|
|
throw new SAXNotSupportedException (name);
|
|
}
|
|
|
|
/**
|
|
* <b>SAX2</b>: Assigns the specified property. At this time only
|
|
* declaration and lexical handlers, and the initial DOM document, are
|
|
* supported. These must not be changed to values of the wrong type.
|
|
* Like SAX1 handlers, these handlers may be changed at any time.
|
|
* Like SAX1 input source or document URI, the initial DOM document
|
|
* may not be changed during a parse.
|
|
*/
|
|
public void setProperty (String name, Object state)
|
|
throws SAXNotRecognizedException, SAXNotSupportedException
|
|
{
|
|
if ((HANDLERS + "declaration-handler").equals (name)) {
|
|
if (!(state instanceof DeclHandler || state == null))
|
|
throw new SAXNotSupportedException (name);
|
|
declHandler = (DeclHandler) state;
|
|
return;
|
|
}
|
|
|
|
if ((HANDLERS + "lexical-handler").equals (name)) {
|
|
if (!(state instanceof LexicalHandler || state == null))
|
|
throw new SAXNotSupportedException (name);
|
|
lexicalHandler = (LexicalHandler) state;
|
|
return;
|
|
}
|
|
|
|
if ((HANDLERS + "dom-node").equals (name)) {
|
|
if (state == null || state instanceof Node) {
|
|
if (current != null)
|
|
throw new SAXNotSupportedException (
|
|
"property is readonly during parse: " + name);
|
|
setStart ((Node) state);
|
|
return;
|
|
}
|
|
throw new SAXNotSupportedException ("not a DOM Node");
|
|
}
|
|
|
|
// unknown properties
|
|
throw new SAXNotRecognizedException (name);
|
|
}
|
|
|
|
private void setStart (Node property)
|
|
{
|
|
start = property;
|
|
if (start != null) {
|
|
isL2 = getIsL2 (start);
|
|
isDocument = (start instanceof Document);
|
|
}
|
|
}
|
|
|
|
//
|
|
// Non-recursive walk, using DOM state when backtracking is needed
|
|
//
|
|
private void walk ()
|
|
throws SAXException
|
|
{
|
|
int type;
|
|
NamedNodeMap nodes;
|
|
int length;
|
|
AttributesImpl attrs = new AttributesImpl ();
|
|
char chars [];
|
|
String ns, local;
|
|
|
|
synchronized (this) {
|
|
if (current != null)
|
|
throw new IllegalStateException ("already walking tree");
|
|
|
|
// JVM guarantees assignments are atomic; so no other
|
|
// thread could get this far till this walk's done.
|
|
current = start;
|
|
}
|
|
|
|
for (;;) {
|
|
type = current.getNodeType ();
|
|
|
|
//
|
|
// First, visit the current node, including any "start" calls
|
|
//
|
|
switch (type) {
|
|
|
|
case Node.DOCUMENT_NODE:
|
|
contentHandler.startDocument ();
|
|
break;
|
|
|
|
case Node.ELEMENT_NODE:
|
|
nodes = current.getAttributes ();
|
|
length = nodes.getLength ();
|
|
prefixStack.pushContext ();
|
|
for (int i = 0; i < length; i++) {
|
|
Attr attr = (Attr) nodes.item (i);
|
|
String name = attr.getNodeName ();
|
|
|
|
if (showNamespaces && name.startsWith ("xmlns")) {
|
|
String prefix;
|
|
String uri;
|
|
|
|
// NOTE: DOM L2 (CR2+ and REC) violate the
|
|
// Namespaces REC, treat "xmlns" like a strange
|
|
// attribute instead of a magic token
|
|
if ("xmlns".equals (name))
|
|
prefix = "";
|
|
else
|
|
prefix = name.substring (6);
|
|
uri = attr.getNodeValue ();
|
|
|
|
prefixStack.declarePrefix (prefix, uri);
|
|
contentHandler.startPrefixMapping (prefix, uri);
|
|
|
|
if (!showXML1_0)
|
|
continue;
|
|
}
|
|
|
|
//
|
|
// NOTE: DOM doesn't record the attribute type info
|
|
// which SAX exposes; so this always reports CDATA.
|
|
//
|
|
// NOTE: SAX doesn't expose the isSpecified info which
|
|
// DOM exposes; that's discarded here. Similarly with
|
|
// the information DOM hides inside itself about what
|
|
// the default values for an attribute are.
|
|
//
|
|
if (showNamespaces) {
|
|
if (isL2) {
|
|
if ((ns = attr.getNamespaceURI ()) == null)
|
|
ns = "";
|
|
// Note: SAX2 and DOM handle "local" names
|
|
// differently
|
|
if ((local = attr.getLocalName ()) == null)
|
|
local = name;
|
|
} else {
|
|
// XXX
|
|
throw new RuntimeException (
|
|
"NYI, ns lookup when parsing L1 DOM");
|
|
}
|
|
} else
|
|
ns = local = "";
|
|
attrs.addAttribute (ns, local, name,
|
|
"CDATA", attr.getNodeValue ());
|
|
}
|
|
if (showNamespaces) {
|
|
if (isL2) {
|
|
if ((ns = current.getNamespaceURI ()) == null)
|
|
ns = "";
|
|
// Note: SAX2 and DOM handle "local" names differently
|
|
if ((local = current.getLocalName ()) == null)
|
|
local = current.getNodeName ();
|
|
} else {
|
|
// XXX
|
|
throw new RuntimeException (
|
|
"NYI, ns lookup when parsing L1 DOM");
|
|
}
|
|
} else
|
|
ns = local = "";
|
|
contentHandler.startElement (ns, local,
|
|
current.getNodeName (), attrs);
|
|
if (length != 0)
|
|
attrs.clear ();
|
|
break;
|
|
|
|
case Node.CDATA_SECTION_NODE:
|
|
lexicalHandler.startCDATA ();
|
|
chars = current.getNodeValue ().toCharArray ();
|
|
contentHandler.characters (chars, 0, chars.length);
|
|
lexicalHandler.endCDATA ();
|
|
break;
|
|
|
|
case Node.COMMENT_NODE:
|
|
chars = current.getNodeValue ().toCharArray ();
|
|
lexicalHandler.comment (chars, 0, chars.length);
|
|
break;
|
|
|
|
case Node.DOCUMENT_TYPE_NODE:
|
|
{
|
|
DocumentType doctype = (DocumentType) current;
|
|
|
|
//
|
|
// Only DOM L2 supports recreating even some DTDs in full.
|
|
//
|
|
if (isL2) {
|
|
lexicalHandler.startDTD (doctype.getName (),
|
|
doctype.getPublicId (),
|
|
doctype.getSystemId ());
|
|
} else
|
|
lexicalHandler.startDTD (doctype.getName (),
|
|
null, null);
|
|
|
|
//
|
|
// The only sure way to recreate is to provide both the
|
|
// internal and external subsets. Otherwise, only part
|
|
// of the job can be done ... because from the DTD, DOM
|
|
// discards both the critical data, like the attribute and
|
|
// element declarations, as well as the PIs and comments
|
|
// that are used to hold their documentation.
|
|
//
|
|
// Even the entity and notation declarations that it can
|
|
// expose can't be recorded without proprietary extensions.
|
|
//
|
|
// We construct a comment to tell what we know about how
|
|
// (in)complete this particular really DTD is.
|
|
//
|
|
{
|
|
String message;
|
|
char buf [];
|
|
|
|
//
|
|
// Though DOM L2 lets the whole doctype be recreated,
|
|
// SAX2 can't represent it (input or output).
|
|
// So this will be the typical case.
|
|
//
|
|
if (isL2 && doctype.getInternalSubset () != null)
|
|
message =
|
|
" Full DTD known; can't be shown using SAX2. ";
|
|
|
|
//
|
|
// Otherwise, we'll concoct a partial DTD. If there's
|
|
// any more data here at all, it was provided using a
|
|
// (proprietary) extension to DOM.
|
|
//
|
|
else
|
|
message =
|
|
" This DTD was was recreated using incomplete DOM L2 records. ";
|
|
|
|
buf = message.toCharArray ();
|
|
lexicalHandler.comment (buf, 0, buf.length);
|
|
}
|
|
|
|
// report notations first
|
|
nodes = doctype.getNotations ();
|
|
length = nodes.getLength ();
|
|
for (int i = 0; i < length; i++) {
|
|
Notation notation = (Notation) nodes.item (i);
|
|
dtdHandler.notationDecl (
|
|
notation.getNodeName (),
|
|
notation.getPublicId (),
|
|
notation.getSystemId ());
|
|
}
|
|
|
|
// then parsed and unparsed external general entities
|
|
nodes = doctype.getEntities ();
|
|
length = nodes.getLength ();
|
|
for (int i = 0; i < length; i++) {
|
|
Entity entity = (Entity) nodes.item (i);
|
|
String notation = entity.getNotationName ();
|
|
|
|
if (notation != null)
|
|
dtdHandler.unparsedEntityDecl (
|
|
entity.getNodeName (),
|
|
entity.getPublicId (),
|
|
entity.getSystemId (),
|
|
notation);
|
|
else if (entity.getSystemId () != null)
|
|
declHandler.externalEntityDecl (
|
|
entity.getNodeName (),
|
|
entity.getPublicId (),
|
|
entity.getSystemId ());
|
|
|
|
//
|
|
// NOTE: DOM doesn't clearly provide internal
|
|
// entity support; but in case someone tries to
|
|
// fudge such support, we defend ourselves above.
|
|
//
|
|
// NOTE: DOM doesn't expose parameter entities
|
|
// (thank you thank you thank you thank you)
|
|
//
|
|
}
|
|
|
|
//
|
|
// NOTE: DOM (levels 1 and 2) doesn't expose real
|
|
// typing information (element or attribute decls),
|
|
// as exposed by SAX2 declaration handlers.
|
|
//
|
|
lexicalHandler.endDTD ();
|
|
}
|
|
break;
|
|
|
|
case Node.ENTITY_REFERENCE_NODE:
|
|
// this isn't done except (a) in content, and
|
|
// (b) not within a start tag (att value)
|
|
lexicalHandler.startEntity (current.getNodeName ());
|
|
break;
|
|
|
|
case Node.PROCESSING_INSTRUCTION_NODE:
|
|
contentHandler.processingInstruction (
|
|
current.getNodeName (), current.getNodeValue ());
|
|
break;
|
|
|
|
case Node.TEXT_NODE:
|
|
chars = current.getNodeValue ().toCharArray ();
|
|
contentHandler.characters (chars, 0, chars.length);
|
|
break;
|
|
|
|
default:
|
|
// e.g. fragments, entities, notations, attributes
|
|
throw new SAXException ("Illegal DOM Node type in Document: "
|
|
+ current.getNodeType ());
|
|
}
|
|
|
|
//
|
|
// Then, pick the next node to visit. If the next node isn't
|
|
// a child, an "end" call may be needed before moving on.
|
|
// If there's no next node, we're done.
|
|
//
|
|
Node next;
|
|
|
|
switch (type) {
|
|
case Node.DOCUMENT_NODE:
|
|
case Node.ELEMENT_NODE:
|
|
case Node.ENTITY_REFERENCE_NODE:
|
|
//
|
|
// For elements that can have children, visit those
|
|
// children before any siblings (i.e. depth first)
|
|
// and after visiting this node (i.e. preorder)
|
|
//
|
|
next = current.getFirstChild ();
|
|
if (next != null) {
|
|
current = next;
|
|
break;
|
|
}
|
|
//
|
|
// Else treat this like other childless nodes, but
|
|
// handle this node's "end" immediately.
|
|
//
|
|
callEnd (current);
|
|
|
|
// FALLTHROUGH
|
|
|
|
case Node.CDATA_SECTION_NODE:
|
|
case Node.COMMENT_NODE:
|
|
case Node.DOCUMENT_TYPE_NODE:
|
|
case Node.ENTITY_NODE:
|
|
case Node.PROCESSING_INSTRUCTION_NODE:
|
|
case Node.TEXT_NODE:
|
|
//
|
|
// Use next sibling, if there is one.
|
|
// Else, climb up a level (calling "end")
|
|
// until we find an ancestral sibling
|
|
// or until we we climb off the top (FINISH)
|
|
//
|
|
for (;;) {
|
|
if ((next = current.getNextSibling ()) != null)
|
|
break;
|
|
current = current.getParentNode ();
|
|
if (current == null || current == start)
|
|
return;
|
|
callEnd (current);
|
|
}
|
|
current = next;
|
|
break;
|
|
|
|
default:
|
|
throw new SAXException (
|
|
"Illegal DOM Node type found: " + current.getNodeType ());
|
|
}
|
|
}
|
|
}
|
|
|
|
private void callEnd (Node node) throws SAXException
|
|
{
|
|
switch (node.getNodeType ()) {
|
|
// only these three container types may ever be found
|
|
// directly inside a Document.
|
|
case Node.DOCUMENT_NODE:
|
|
// for SAX conformance, endDocument must always
|
|
// be called ... it's done in a "finally" clause)
|
|
return;
|
|
|
|
case Node.ELEMENT_NODE:
|
|
if (showNamespaces) {
|
|
if (isL2)
|
|
contentHandler.endElement (
|
|
node.getNamespaceURI (),
|
|
node.getLocalName (),
|
|
node.getNodeName ());
|
|
else
|
|
// XXX
|
|
throw new RuntimeException (
|
|
"NYI, ns lookup when parsing L1 DOM");
|
|
for (Enumeration e = prefixStack.getDeclaredPrefixes ();
|
|
e.hasMoreElements ();
|
|
) {
|
|
contentHandler.endPrefixMapping ((String) e.nextElement ());
|
|
}
|
|
} else
|
|
contentHandler.endElement ("", "", node.getNodeName ());
|
|
prefixStack.popContext ();
|
|
return;
|
|
|
|
case Node.ENTITY_REFERENCE_NODE:
|
|
// see above -- in content, outside start tags.
|
|
lexicalHandler.endEntity (node.getNodeName ());
|
|
return;
|
|
|
|
// these can be given at the top level
|
|
case Node.DOCUMENT_FRAGMENT_NODE:
|
|
case Node.ATTRIBUTE_NODE:
|
|
return;
|
|
|
|
default:
|
|
throw new SAXException (
|
|
"Illegal DOM container type found: "
|
|
+ current.getNodeType ());
|
|
}
|
|
}
|
|
}
|