/**
* Constructs a namespace context object and initializes it with the prefixes declared in the
* specified context.
*/
public NamespaceSupport(NamespaceContext context) {
pushContext();
// copy declaration in the context
Enumeration prefixes = context.getAllPrefixes();
while (prefixes.hasMoreElements()) {
String prefix = (String) prefixes.nextElement();
String uri = context.getURI(prefix);
declarePrefix(prefix, uri);
}
} // <init>(NamespaceContext)
public boolean reset() {
super.reset();
if (fNSBinder != null) {
fNSBinder.reset();
// during serialization always have a mapping to empty string
// so we assume there is a declaration.
fNSBinder.declarePrefix(XMLSymbols.EMPTY_STRING, XMLSymbols.EMPTY_STRING);
}
return true;
}
/**
* Called to serialize a DOM element. Equivalent to calling {@link #startElement}, {@link
* #endElement} and serializing everything inbetween, but better optimized.
*/
protected void serializeElement(Element elem) throws IOException {
Attr attr;
NamedNodeMap attrMap;
int i;
Node child;
ElementState state;
String name;
String value;
String tagName;
String prefix, localUri;
String uri;
if (fNamespaces) {
// local binder stores namespace declaration
// that has been printed out during namespace fixup of
// the current element
fLocalNSBinder.reset();
// add new namespace context
fNSBinder.pushContext();
}
if (DEBUG) {
System.out.println(
"==>startElement: " + elem.getNodeName() + " ns=" + elem.getNamespaceURI());
}
tagName = elem.getTagName();
state = getElementState();
if (isDocumentState()) {
// If this is the root element handle it differently.
// If the first root element in the document, serialize
// the document's DOCTYPE. Space preserving defaults
// to that of the output format.
if (!_started) {
startDocument(tagName);
}
} else {
// For any other element, if first in parent, then
// close parent's opening tag and use the parent's
// space preserving.
if (state.empty) _printer.printText('>');
// Must leave CData section first
if (state.inCData) {
_printer.printText("]]>");
state.inCData = false;
}
// Indent this element on a new line if the first
// content of the parent element or immediately
// following an element.
if (_indenting
&& !state.preserveSpace
&& (state.empty || state.afterElement || state.afterComment)) _printer.breakLine();
}
// Do not change the current element state yet.
// This only happens in endElement().
fPreserveSpace = state.preserveSpace;
int length = 0;
attrMap = null;
// retrieve attributes
if (elem.hasAttributes()) {
attrMap = elem.getAttributes();
length = attrMap.getLength();
}
if (!fNamespaces) { // no namespace fixup should be performed
// serialize element name
_printer.printText('<');
_printer.printText(tagName);
_printer.indent();
// For each attribute print it's name and value as one part,
// separated with a space so the element can be broken on
// multiple lines.
for (i = 0; i < length; ++i) {
attr = (Attr) attrMap.item(i);
name = attr.getName();
value = attr.getValue();
if (value == null) value = "";
printAttribute(name, value, attr.getSpecified(), attr);
}
} else { // do namespace fixup
// REVISIT: some optimization could probably be done to avoid traversing
// attributes twice.
//
// ---------------------------------------
// record all valid namespace declarations
// before attempting to fix element's namespace
// ---------------------------------------
for (i = 0; i < length; i++) {
attr = (Attr) attrMap.item(i);
uri = attr.getNamespaceURI();
// check if attribute is a namespace decl
if (uri != null && uri.equals(NamespaceContext.XMLNS_URI)) {
value = attr.getNodeValue();
if (value == null) {
value = XMLSymbols.EMPTY_STRING;
}
if (value.equals(NamespaceContext.XMLNS_URI)) {
if (fDOMErrorHandler != null) {
String msg =
DOMMessageFormatter.formatMessage(
DOMMessageFormatter.XML_DOMAIN, "CantBindXMLNS", null);
modifyDOMError(msg, DOMError.SEVERITY_ERROR, null, attr);
boolean continueProcess = fDOMErrorHandler.handleError(fDOMError);
if (!continueProcess) {
// stop the namespace fixup and validation
throw new RuntimeException(
DOMMessageFormatter.formatMessage(
DOMMessageFormatter.SERIALIZER_DOMAIN, "SerializationStopped", null));
}
}
} else {
prefix = attr.getPrefix();
prefix =
(prefix == null || prefix.length() == 0)
? XMLSymbols.EMPTY_STRING
: fSymbolTable.addSymbol(prefix);
String localpart = fSymbolTable.addSymbol(attr.getLocalName());
if (prefix == XMLSymbols.PREFIX_XMLNS) { // xmlns:prefix
value = fSymbolTable.addSymbol(value);
// record valid decl
if (value.length() != 0) {
fNSBinder.declarePrefix(localpart, value);
} else {
// REVISIT: issue error on invalid declarations
// xmlns:foo = ""
}
continue;
} else { // xmlns
// empty prefix is always bound ("" or some string)
value = fSymbolTable.addSymbol(value);
fNSBinder.declarePrefix(XMLSymbols.EMPTY_STRING, value);
continue;
}
} // end-else: valid declaration
} // end-if: namespace declaration
} // end-for
// -----------------------
// get element uri/prefix
// -----------------------
uri = elem.getNamespaceURI();
prefix = elem.getPrefix();
// ----------------------
// output element name
// ----------------------
// REVISIT: this could be removed if we always convert empty string to null
// for the namespaces.
if ((uri != null && prefix != null) && uri.length() == 0 && prefix.length() != 0) {
// uri is an empty string and element has some prefix
// the namespace alg later will fix up the namespace attributes
// remove element prefix
prefix = null;
_printer.printText('<');
_printer.printText(elem.getLocalName());
_printer.indent();
} else {
_printer.printText('<');
_printer.printText(tagName);
_printer.indent();
}
// ---------------------------------------------------------
// Fix up namespaces for element: per DOM L3
// Need to consider the following cases:
//
// case 1: <foo:elem xmlns:ns1="myURI" xmlns="default"/>
// Assume "foo", "ns1" are declared on the parent. We should not miss
// redeclaration for both "ns1" and default namespace. To solve this
// we add a local binder that stores declaration only for current element.
// This way we avoid outputing duplicate declarations for the same element
// as well as we are not omitting redeclarations.
//
// case 2: <elem xmlns="" xmlns="default"/>
// We need to bind default namespace to empty string, to be able to
// omit duplicate declarations for the same element
//
// case 3: <xsl:stylesheet xmlns:xsl="http://xsl">
// We create another element body bound to the "http://xsl" namespace
// as well as namespace attribute rebounding xsl to another namespace.
// <xsl:body xmlns:xsl="http://another">
// Need to make sure that the new namespace decl value is changed to
// "http://xsl"
//
// ---------------------------------------------------------
// check if prefix/namespace is correct for current element
// ---------------------------------------------------------
if (uri != null) { // Element has a namespace
uri = fSymbolTable.addSymbol(uri);
prefix =
(prefix == null || prefix.length() == 0)
? XMLSymbols.EMPTY_STRING
: fSymbolTable.addSymbol(prefix);
if (fNSBinder.getURI(prefix) == uri) {
// The xmlns:prefix=namespace or xmlns="default" was declared at parent.
// The binder always stores mapping of empty prefix to "".
// (NOTE: local binder does not store this kind of binding!)
// Thus the case where element was declared with uri="" (with or without a prefix)
// will be covered here.
} else {
// the prefix is either undeclared
// or
// conflict: the prefix is bound to another URI
if (fNamespacePrefixes) {
printNamespaceAttr(prefix, uri);
}
fLocalNSBinder.declarePrefix(prefix, uri);
fNSBinder.declarePrefix(prefix, uri);
}
} else { // Element has no namespace
if (elem.getLocalName() == null) {
// DOM Level 1 node!
if (fDOMErrorHandler != null) {
String msg =
DOMMessageFormatter.formatMessage(
DOMMessageFormatter.DOM_DOMAIN,
"NullLocalElementName",
new Object[] {elem.getNodeName()});
modifyDOMError(msg, DOMError.SEVERITY_ERROR, null, elem);
boolean continueProcess = fDOMErrorHandler.handleError(fDOMError);
// REVISIT: should we terminate upon request?
if (!continueProcess) {
throw new RuntimeException(
DOMMessageFormatter.formatMessage(
DOMMessageFormatter.SERIALIZER_DOMAIN, "SerializationStopped", null));
}
}
} else { // uri=null and no colon (DOM L2 node)
uri = fNSBinder.getURI(XMLSymbols.EMPTY_STRING);
if (uri != null && uri.length() > 0) {
// there is a default namespace decl that is bound to
// non-zero length uri, output xmlns=""
if (fNamespacePrefixes) {
printNamespaceAttr(XMLSymbols.EMPTY_STRING, XMLSymbols.EMPTY_STRING);
}
fLocalNSBinder.declarePrefix(XMLSymbols.EMPTY_STRING, XMLSymbols.EMPTY_STRING);
fNSBinder.declarePrefix(XMLSymbols.EMPTY_STRING, XMLSymbols.EMPTY_STRING);
}
}
}
// -----------------------------------------
// Fix up namespaces for attributes: per DOM L3
// check if prefix/namespace is correct the attributes
// -----------------------------------------
for (i = 0; i < length; i++) {
attr = (Attr) attrMap.item(i);
value = attr.getValue();
name = attr.getNodeName();
uri = attr.getNamespaceURI();
// Fix attribute that was declared with a prefix and namespace=""
if (uri != null && uri.length() == 0) {
uri = null;
// we must remove prefix for this attribute
name = attr.getLocalName();
}
if (DEBUG) {
System.out.println("==>process attribute: " + attr.getNodeName());
}
// make sure that value is never null.
if (value == null) {
value = XMLSymbols.EMPTY_STRING;
}
if (uri != null) { // attribute has namespace !=null
prefix = attr.getPrefix();
prefix = prefix == null ? XMLSymbols.EMPTY_STRING : fSymbolTable.addSymbol(prefix);
String localpart = fSymbolTable.addSymbol(attr.getLocalName());
// ---------------------------------------------------
// print namespace declarations namespace declarations
// ---------------------------------------------------
if (uri != null && uri.equals(NamespaceContext.XMLNS_URI)) {
// check if we need to output this declaration
prefix = attr.getPrefix();
prefix =
(prefix == null || prefix.length() == 0)
? XMLSymbols.EMPTY_STRING
: fSymbolTable.addSymbol(prefix);
localpart = fSymbolTable.addSymbol(attr.getLocalName());
if (prefix == XMLSymbols.PREFIX_XMLNS) { // xmlns:prefix
localUri = fLocalNSBinder.getURI(localpart); // local prefix mapping
value = fSymbolTable.addSymbol(value);
if (value.length() != 0) {
if (localUri == null) {
// declaration was not printed while fixing element namespace binding
// If the DOM Level 3 namespace-prefixes feature is set to false
// do not print xmlns attributes
if (fNamespacePrefixes) {
printNamespaceAttr(localpart, value);
}
// case 4: <elem xmlns:xx="foo" xx:attr=""/>
// where attribute is bound to "bar".
// If the xmlns:xx is output here first, later we should not
// redeclare "xx" prefix. Instead we would pick up different prefix
// for the attribute.
// final: <elem xmlns:xx="foo" NS1:attr="" xmlns:NS1="bar"/>
fLocalNSBinder.declarePrefix(localpart, value);
}
} else {
// REVISIT: issue error on invalid declarations
// xmlns:foo = ""
}
continue;
} else { // xmlns
// empty prefix is always bound ("" or some string)
uri = fNSBinder.getURI(XMLSymbols.EMPTY_STRING);
localUri = fLocalNSBinder.getURI(XMLSymbols.EMPTY_STRING);
value = fSymbolTable.addSymbol(value);
if (localUri == null) {
// declaration was not printed while fixing element namespace binding
if (fNamespacePrefixes) {
printNamespaceAttr(XMLSymbols.EMPTY_STRING, value);
}
// case 4 does not apply here since attributes can't use
// default namespace
}
continue;
}
}
uri = fSymbolTable.addSymbol(uri);
// find if for this prefix a URI was already declared
String declaredURI = fNSBinder.getURI(prefix);
if (prefix == XMLSymbols.EMPTY_STRING || declaredURI != uri) {
// attribute has no prefix (default namespace decl does not apply to attributes)
// OR
// attribute prefix is not declared
// OR
// conflict: attr URI does not match the prefix in scope
name = attr.getNodeName();
// Find if any prefix for attributes namespace URI is available
// in the scope
String declaredPrefix = fNSBinder.getPrefix(uri);
if (declaredPrefix != null && declaredPrefix != XMLSymbols.EMPTY_STRING) {
// use the prefix that was found
prefix = declaredPrefix;
name = prefix + ":" + localpart;
} else {
if (DEBUG) {
System.out.println("==> cound not find prefix for the attribute: " + prefix);
}
if (prefix != XMLSymbols.EMPTY_STRING && fLocalNSBinder.getURI(prefix) == null) {
// the current prefix is not null and it has no in scope declaration
// use this prefix
} else {
// find a prefix following the pattern "NS" +index (starting at 1)
// make sure this prefix is not declared in the current scope.
int counter = 1;
prefix = fSymbolTable.addSymbol(PREFIX + counter++);
while (fLocalNSBinder.getURI(prefix) != null) {
prefix = fSymbolTable.addSymbol(PREFIX + counter++);
}
name = prefix + ":" + localpart;
}
// add declaration for the new prefix
if (fNamespacePrefixes) {
printNamespaceAttr(prefix, uri);
}
value = fSymbolTable.addSymbol(value);
fLocalNSBinder.declarePrefix(prefix, value);
fNSBinder.declarePrefix(prefix, uri);
}
// change prefix for this attribute
}
printAttribute(
name, (value == null) ? XMLSymbols.EMPTY_STRING : value, attr.getSpecified(), attr);
} else { // attribute uri == null
if (attr.getLocalName() == null) {
if (fDOMErrorHandler != null) {
String msg =
DOMMessageFormatter.formatMessage(
DOMMessageFormatter.DOM_DOMAIN,
"NullLocalAttrName",
new Object[] {attr.getNodeName()});
modifyDOMError(msg, DOMError.SEVERITY_ERROR, null, attr);
boolean continueProcess = fDOMErrorHandler.handleError(fDOMError);
if (!continueProcess) {
// stop the namespace fixup and validation
throw new RuntimeException(
DOMMessageFormatter.formatMessage(
DOMMessageFormatter.SERIALIZER_DOMAIN, "SerializationStopped", null));
}
}
printAttribute(name, value, attr.getSpecified(), attr);
} else { // uri=null and no colon
// no fix up is needed: default namespace decl does not
// apply to attributes
printAttribute(name, value, attr.getSpecified(), attr);
}
}
} // end loop for attributes
} // end namespace fixup algorithm
// If element has children, then serialize them, otherwise
// serialize en empty tag.
if (elem.hasChildNodes()) {
// Enter an element state, and serialize the children
// one by one. Finally, end the element.
state = enterElementState(null, null, tagName, fPreserveSpace);
state.doCData = _format.isCDataElement(tagName);
state.unescaped = _format.isNonEscapingElement(tagName);
child = elem.getFirstChild();
while (child != null) {
serializeNode(child);
child = child.getNextSibling();
}
if (fNamespaces) {
fNSBinder.popContext();
}
endElementIO(null, null, tagName);
} else {
if (DEBUG) {
System.out.println("==>endElement: " + elem.getNodeName());
}
if (fNamespaces) {
fNSBinder.popContext();
}
_printer.unindent();
_printer.printText("/>");
// After element but parent element is no longer empty.
state.afterElement = true;
state.afterComment = false;
state.empty = false;
if (isDocumentState()) _printer.flush();
}
}