| Methods Summary |
|---|
| private java.lang.String | accessedNamespace(java.lang.String prefix)Returns the namespace URI for which a prefix is pointing to
if (_accessedPrefixes == null)
return(null);
else
return((String)_accessedPrefixes.get(prefix));
|
| public void | addAttribute(com.sun.org.apache.xalan.internal.xsltc.compiler.SyntaxTreeNode attribute)Add an attribute to this element
if (_attributeElements == null) {
_attributeElements = new Vector(2);
}
_attributeElements.add(attribute);
|
| public boolean | allAttributesUnique()Return true if all attributes of this LRE have unique names.
return _allAttributesUnique;
|
| private boolean | canProduceAttributeNodes(com.sun.org.apache.xalan.internal.xsltc.compiler.SyntaxTreeNode node, boolean ignoreXslAttribute)Return true if the instructions under the given SyntaxTreeNode can produce attribute nodes
to an element. Only return false when we are sure that no attribute node is produced.
Return true if we are not sure. If the flag ignoreXslAttribute is true, the direct
children of the current node are not included in the check.
Vector contents = node.getContents();
int size = contents.size();
for (int i = 0; i < size; i++) {
SyntaxTreeNode child = (SyntaxTreeNode)contents.elementAt(i);
if (child instanceof Text) {
Text text = (Text)child;
if (text.isIgnore())
continue;
else
return false;
}
// Cannot add an attribute to an element after children have been added to it.
// We can safely return false when the instruction can produce an output node.
else if (child instanceof LiteralElement
|| child instanceof ValueOf
|| child instanceof XslElement
|| child instanceof Comment
|| child instanceof Number
|| child instanceof ProcessingInstruction)
return false;
else if (child instanceof XslAttribute) {
if (ignoreXslAttribute)
continue;
else
return true;
}
// In general, there is no way to check whether <xsl:call-template> or
// <xsl:apply-templates> can produce attribute nodes. <xsl:copy> and
// <xsl:copy-of> can also copy attribute nodes to an element. Return
// true in those cases to be safe.
else if (child instanceof CallTemplate
|| child instanceof ApplyTemplates
|| child instanceof Copy
|| child instanceof CopyOf)
return true;
else if ((child instanceof If
|| child instanceof ForEach)
&& canProduceAttributeNodes(child, false)) {
return true;
}
else if (child instanceof Choose) {
Vector chooseContents = child.getContents();
int num = chooseContents.size();
for (int k = 0; k < num; k++) {
SyntaxTreeNode chooseChild = (SyntaxTreeNode)chooseContents.elementAt(k);
if (chooseChild instanceof When || chooseChild instanceof Otherwise) {
if (canProduceAttributeNodes(chooseChild, false))
return true;
}
}
}
}
return false;
|
| private boolean | checkAttributesUnique()Check whether all attributes are unique.
boolean hasHiddenXslAttribute = canProduceAttributeNodes(this, true);
if (hasHiddenXslAttribute)
return false;
if (_attributeElements != null) {
int numAttrs = _attributeElements.size();
Hashtable attrsTable = null;
for (int i = 0; i < numAttrs; i++) {
SyntaxTreeNode node = (SyntaxTreeNode)_attributeElements.elementAt(i);
if (node instanceof UseAttributeSets) {
return false;
}
else if (node instanceof XslAttribute) {
if (attrsTable == null) {
attrsTable = new Hashtable();
for (int k = 0; k < i; k++) {
SyntaxTreeNode n = (SyntaxTreeNode)_attributeElements.elementAt(k);
if (n instanceof LiteralAttribute) {
LiteralAttribute literalAttr = (LiteralAttribute)n;
attrsTable.put(literalAttr.getName(), literalAttr);
}
}
}
XslAttribute xslAttr = (XslAttribute)node;
AttributeValue attrName = xslAttr.getName();
if (attrName instanceof AttributeValueTemplate) {
return false;
}
else if (attrName instanceof SimpleAttributeValue) {
SimpleAttributeValue simpleAttr = (SimpleAttributeValue)attrName;
String name = simpleAttr.toString();
if (name != null && attrsTable.get(name) != null)
return false;
else if (name != null) {
attrsTable.put(name, xslAttr);
}
}
}
}
}
return true;
|
| protected boolean | contextDependent()
return dependentContents();
|
| public void | display(int indent)Displays the contents of this literal element
indent(indent);
Util.println("LiteralElement name = " + _name);
displayContents(indent + IndentIncrement);
|
| public com.sun.org.apache.xml.internal.serializer.ElemDesc | getElemDesc()Return the ElemDesc object for an HTML element.
Return null if the output method is not HTML or this is not a
valid HTML element.
if (isHTMLOutput()) {
return ToHTMLStream.getElemDesc(_name);
}
else
return null;
|
| public com.sun.org.apache.xalan.internal.xsltc.compiler.QName | getName()Returns the QName for this literal element
return _qname;
|
| public java.util.Enumeration | getNamespaceScope(com.sun.org.apache.xalan.internal.xsltc.compiler.SyntaxTreeNode node)This method starts at a given node, traverses all namespace mappings,
and assembles a list of all prefixes that (for the given node) maps
to _ANY_ namespace URI. Used by literal result elements to determine
Hashtable all = new Hashtable();
while (node != null) {
Hashtable mapping = node.getPrefixMapping();
if (mapping != null) {
Enumeration prefixes = mapping.keys();
while (prefixes.hasMoreElements()) {
String prefix = (String)prefixes.nextElement();
if (!all.containsKey(prefix)) {
all.put(prefix, mapping.get(prefix));
}
}
}
node = node.getParent();
}
return(all.keys());
|
| private boolean | isHTMLOutput()Return true if the output method is html.
return getStylesheet().getOutputMethod() == Stylesheet.HTML_OUTPUT;
|
| public void | parseContents(com.sun.org.apache.xalan.internal.xsltc.compiler.Parser parser)Determines the final QName for the element and its attributes.
Registers all namespaces that are used by the element/attributes
final SymbolTable stable = parser.getSymbolTable();
stable.setCurrentNode(this);
// Find the closest literal element ancestor (if there is one)
SyntaxTreeNode _literalElemParent = getParent();
while (_literalElemParent != null && !(_literalElemParent instanceof LiteralElement)) {
_literalElemParent = _literalElemParent.getParent();
}
if (!(_literalElemParent instanceof LiteralElement)) {
_literalElemParent = null;
}
_name = translateQName(_qname, stable);
// Process all attributes and register all namespaces they use
final int count = _attributes.getLength();
for (int i = 0; i < count; i++) {
final QName qname = parser.getQName(_attributes.getQName(i));
final String uri = qname.getNamespace();
final String val = _attributes.getValue(i);
// Handle xsl:use-attribute-sets. Attribute sets are placed first
// in the vector or attributes to make sure that later local
// attributes can override an attributes in the set.
if (qname == parser.getUseAttributeSets()) {
if (!Util.isValidQNames(val)) {
ErrorMsg err = new ErrorMsg(ErrorMsg.INVALID_QNAME_ERR, val, this);
parser.reportError(Constants.ERROR, err);
}
setFirstAttribute(new UseAttributeSets(val, parser));
}
// Handle xsl:extension-element-prefixes
else if (qname == parser.getExtensionElementPrefixes()) {
stable.excludeNamespaces(val);
}
// Handle xsl:exclude-result-prefixes
else if (qname == parser.getExcludeResultPrefixes()) {
stable.excludeNamespaces(val);
}
else {
// Ignore special attributes (e.g. xmlns:prefix and xmlns)
final String prefix = qname.getPrefix();
if (prefix != null && prefix.equals(XMLNS_PREFIX) ||
prefix == null && qname.getLocalPart().equals("xmlns") ||
uri != null && uri.equals(XSLT_URI))
{
continue;
}
// Handle all other literal attributes
final String name = translateQName(qname, stable);
LiteralAttribute attr = new LiteralAttribute(name, val, parser, this);
addAttribute(attr);
attr.setParent(this);
attr.parseContents(parser);
}
}
// Register all namespaces that are in scope, except for those that
// are listed in the xsl:stylesheet element's *-prefixes attributes
final Enumeration include = getNamespaceScope(this);
while (include.hasMoreElements()) {
final String prefix = (String)include.nextElement();
if (!prefix.equals("xml")) {
final String uri = lookupNamespace(prefix);
if (uri != null && !stable.isExcludedNamespace(uri)) {
registerNamespace(prefix, uri, stable, true);
}
}
}
parseChildren(parser);
// Process all attributes and register all namespaces they use
for (int i = 0; i < count; i++) {
final QName qname = parser.getQName(_attributes.getQName(i));
final String val = _attributes.getValue(i);
// Handle xsl:extension-element-prefixes
if (qname == parser.getExtensionElementPrefixes()) {
stable.unExcludeNamespaces(val);
}
// Handle xsl:exclude-result-prefixes
else if (qname == parser.getExcludeResultPrefixes()) {
stable.unExcludeNamespaces(val);
}
}
|
| public void | registerNamespace(java.lang.String prefix, java.lang.String uri, com.sun.org.apache.xalan.internal.xsltc.compiler.SymbolTable stable, boolean declared)Method used to keep track of what namespaces that are references by
this literal element and its attributes. The output must contain a
definition for each namespace, so we stuff them in a hashtable.
// Check if the parent has a declaration for this namespace
if (_literalElemParent != null) {
final String parentUri = _literalElemParent.accessedNamespace(prefix);
if (parentUri == null) {
_literalElemParent.registerNamespace(prefix, uri, stable, declared);
return;
}
if (parentUri.equals(uri)) return;
}
// Check if we have any declared namesaces
if (_accessedPrefixes == null) {
_accessedPrefixes = new Hashtable();
}
else {
if (!declared) {
// Check if this node has a declaration for this namespace
final String old = (String)_accessedPrefixes.get(prefix);
if (old != null) {
if (old.equals(uri))
return;
else
prefix = stable.generateNamespacePrefix();
}
}
}
if (!prefix.equals("xml")) {
_accessedPrefixes.put(prefix,uri);
}
|
| public void | setFirstAttribute(com.sun.org.apache.xalan.internal.xsltc.compiler.SyntaxTreeNode attribute)Set the first attribute of this element
if (_attributeElements == null) {
_attributeElements = new Vector(2);
}
_attributeElements.insertElementAt(attribute,0);
|
| public void | translate(com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator classGen, com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator methodGen)Compiles code that emits the literal element to the output handler,
first the start tag, then namespace declaration, then attributes,
then the element contents, and then the element end tag. Since the
value of an attribute may depend on a variable, variables must be
compiled first.
final ConstantPoolGen cpg = classGen.getConstantPool();
final InstructionList il = methodGen.getInstructionList();
// Check whether all attributes are unique.
_allAttributesUnique = checkAttributesUnique();
// Compile code to emit element start tag
il.append(methodGen.loadHandler());
il.append(new PUSH(cpg, _name));
il.append(DUP2); // duplicate these 2 args for endElement
il.append(methodGen.startElement());
// The value of an attribute may depend on a (sibling) variable
int j=0;
while (j < elementCount())
{
final SyntaxTreeNode item = (SyntaxTreeNode) elementAt(j);
if (item instanceof Variable) {
item.translate(classGen, methodGen);
removeElement(item); // avoid translating it twice
/* When removing an element we do not increment j
* but the removal will reduce the value of elementCount()
* so this loop WILL end. The next iteration will process
* elementAt(j), but with the old element removed
* we are actually processing the next element.
*/
}
else
j++;
}
// Compile code to emit namespace attributes
if (_accessedPrefixes != null) {
boolean declaresDefaultNS = false;
Enumeration e = _accessedPrefixes.keys();
while (e.hasMoreElements()) {
final String prefix = (String)e.nextElement();
final String uri = (String)_accessedPrefixes.get(prefix);
if (uri != Constants.EMPTYSTRING ||
prefix != Constants.EMPTYSTRING)
{
if (prefix == Constants.EMPTYSTRING) {
declaresDefaultNS = true;
}
il.append(methodGen.loadHandler());
il.append(new PUSH(cpg,prefix));
il.append(new PUSH(cpg,uri));
il.append(methodGen.namespace());
}
}
/*
* If our XslElement parent redeclares the default NS, and this
* element doesn't, it must be redeclared one more time.
*/
if (!declaresDefaultNS && (_parent instanceof XslElement)
&& ((XslElement) _parent).declaresDefaultNS())
{
il.append(methodGen.loadHandler());
il.append(new PUSH(cpg, Constants.EMPTYSTRING));
il.append(new PUSH(cpg, Constants.EMPTYSTRING));
il.append(methodGen.namespace());
}
}
// Output all attributes
if (_attributeElements != null) {
final int count = _attributeElements.size();
for (int i = 0; i < count; i++) {
SyntaxTreeNode node =
(SyntaxTreeNode)_attributeElements.elementAt(i);
if (!(node instanceof XslAttribute)) {
node.translate(classGen, methodGen);
}
}
}
// Compile code to emit attributes and child elements
translateContents(classGen, methodGen);
// Compile code to emit element end tag
il.append(methodGen.endElement());
|
| private java.lang.String | translateQName(com.sun.org.apache.xalan.internal.xsltc.compiler.QName qname, com.sun.org.apache.xalan.internal.xsltc.compiler.SymbolTable stable)Translates the prefix of a QName according to the rules set in
the attributes of xsl:stylesheet. Also registers a QName to assure
that the output element contains the necessary namespace declarations.
// Break up the QName and get prefix:localname strings
String localname = qname.getLocalPart();
String prefix = qname.getPrefix();
// Treat default namespace as "" and not null
if (prefix == null)
prefix = Constants.EMPTYSTRING;
else if (prefix.equals(XMLNS_STRING))
return(XMLNS_STRING);
// Check if we must translate the prefix
final String alternative = stable.lookupPrefixAlias(prefix);
if (alternative != null) {
stable.excludeNamespaces(prefix);
prefix = alternative;
}
// Get the namespace this prefix refers to
String uri = lookupNamespace(prefix);
if (uri == null) return(localname);
// Register the namespace as accessed
registerNamespace(prefix, uri, stable, false);
// Construct the new name for the element (may be unchanged)
if (prefix != Constants.EMPTYSTRING)
return(prefix+":"+localname);
else
return(localname);
|
| public com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type | typeCheck(com.sun.org.apache.xalan.internal.xsltc.compiler.SymbolTable stable)Type-check the contents of this element. The element itself does not
need any type checking as it leaves nothign on the JVM's stack.
// Type-check all attributes
if (_attributeElements != null) {
final int count = _attributeElements.size();
for (int i = 0; i < count; i++) {
SyntaxTreeNode node =
(SyntaxTreeNode)_attributeElements.elementAt(i);
node.typeCheck(stable);
}
}
typeCheckContents(stable);
return Type.Void;
|
