package net.sf.saxon.style;
import net.sf.saxon.expr.Expression;
import net.sf.saxon.expr.StringLiteral;
import net.sf.saxon.instruct.Executable;
import net.sf.saxon.instruct.Namespace;
import net.sf.saxon.om.*;
import net.sf.saxon.trans.XPathException;
import net.sf.saxon.type.Type;
import net.sf.saxon.value.StringValue;
import net.sf.saxon.value.Whitespace;
/**
* An xsl:namespace element in the stylesheet. (XSLT 2.0)
*/
public class XSLNamespace extends XSLStringConstructor {
Expression name;
public void prepareAttributes() throws XPathException {
String nameAtt = null;
String selectAtt = null;
AttributeCollection atts = getAttributeList();
for (int a=0; a<atts.getLength(); a++) {
int nc = atts.getNameCode(a);
String f = getNamePool().getClarkName(nc);
if (f==StandardNames.NAME) {
nameAtt = Whitespace.trim(atts.getValue(a)) ;
} else if (f==StandardNames.SELECT) {
selectAtt = Whitespace.trim(atts.getValue(a)) ;
} else {
checkUnknownAttribute(nc);
}
}
if (nameAtt==null) {
reportAbsence("name");
} else {
name = makeAttributeValueTemplate(nameAtt);
}
if (selectAtt!=null) {
select = makeExpression(selectAtt);
}
}
public void validate() throws XPathException {
name = typeCheck("name", name);
select = typeCheck("select", select);
int countChildren = 0;
NodeInfo firstChild = null;
AxisIterator kids = iterateAxis(Axis.CHILD);
while (true) {
NodeInfo child = (NodeInfo)kids.next();
if (child == null) {
break;
}
if (child instanceof XSLFallback) {
continue;
}
if (select != null) {
String errorCode = getErrorCodeForSelectPlusContent();
compileError("An " + getDisplayName() + " element with a select attribute must be empty", errorCode);
}
countChildren++;
if (firstChild == null) {
firstChild = child;
} else {
break;
}
}
if (select == null) {
if (countChildren == 0) {
// there are no child nodes and no select attribute
select = new StringLiteral(StringValue.EMPTY_STRING);
} else if (countChildren == 1) {
// there is exactly one child node
if (firstChild.getNodeKind() == Type.TEXT) {
// it is a text node: optimize for this case
select = new StringLiteral(firstChild.getStringValueCS());
}
}
}
}
/**
* Get the error code to be returned when the element has a select attribute but is not empty.
*
* @return the error code defined for this condition, for this particular instruction
*/
protected String getErrorCodeForSelectPlusContent() {
return "XTSE0910";
}
public Expression compile(Executable exec) throws XPathException {
Namespace inst = new Namespace(name);
compileContent(exec, inst, new StringLiteral(StringValue.SINGLE_SPACE));
return inst;
}
}
//
// The contents of this file are subject to the Mozilla Public License Version 1.0 (the "License");
// you may not use this file except in compliance with the License. You may obtain a copy of the
// License at http://www.mozilla.org/MPL/
//
// Software distributed under the License is distributed on an "AS IS" basis,
// WITHOUT WARRANTY OF ANY KIND, either express or implied.
// See the License for the specific language governing rights and limitations under the License.
//
// The Original Code is: all this file.
//
// The Initial Developer of the Original Code is Michael H. Kay.
//
// Portions created by (your name) are Copyright (C) (your legal entity). All Rights Reserved.
//
// Contributor(s): none.
//