package net.sf.saxon.style;
import net.sf.saxon.expr.Expression;
import net.sf.saxon.expr.StringLiteral;
import net.sf.saxon.instruct.ComputedAttribute;
import net.sf.saxon.instruct.Executable;
import net.sf.saxon.instruct.FixedAttribute;
import net.sf.saxon.om.*;
import net.sf.saxon.trans.Err;
import net.sf.saxon.trans.XPathException;
import net.sf.saxon.type.SchemaType;
import net.sf.saxon.type.SimpleType;
import net.sf.saxon.value.AnyURIValue;
import net.sf.saxon.value.StringValue;
import net.sf.saxon.value.Whitespace;
/**
* xsl:attribute element in stylesheet. <br>
*/
public final class XSLAttribute extends XSLStringConstructor {
private Expression attributeName;
private Expression separator;
private Expression namespace = null;
private int validationAction = Validation.PRESERVE;
private SimpleType schemaType;
public void prepareAttributes() throws XPathException {
AttributeCollection atts = getAttributeList();
String nameAtt = null;
String namespaceAtt = null;
String selectAtt = null;
String separatorAtt = null;
String validationAtt = null;
String typeAtt = null;
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.NAMESPACE) {
namespaceAtt = Whitespace.trim(atts.getValue(a));
} else if (f==StandardNames.SELECT) {
selectAtt = atts.getValue(a);
} else if (f==StandardNames.SEPARATOR) {
separatorAtt = atts.getValue(a);
} else if (f==StandardNames.VALIDATION) {
validationAtt = Whitespace.trim(atts.getValue(a));
} else if (f==StandardNames.TYPE) {
typeAtt = Whitespace.trim(atts.getValue(a));
} else {
checkUnknownAttribute(nc);
}
}
if (nameAtt==null) {
reportAbsence("name");
return;
}
attributeName = makeAttributeValueTemplate(nameAtt);
if (attributeName instanceof StringLiteral) {
if (!getConfiguration().getNameChecker().isQName(((StringLiteral)attributeName).getStringValue())) {
invalidAttributeName("Attribute name " + Err.wrap(nameAtt) + " is not a valid QName");
}
if (nameAtt.equals("xmlns")) {
if (namespace==null) {
invalidAttributeName("Invalid attribute name: xmlns");
}
}
if (nameAtt.startsWith("xmlns:")) {
if (namespaceAtt == null) {
invalidAttributeName("Invalid attribute name: " + Err.wrap(nameAtt));
} else {
// ignore the prefix "xmlns"
nameAtt = nameAtt.substring(6);
attributeName = new StringLiteral(nameAtt);
}
}
}
if (namespaceAtt!=null) {
namespace = makeAttributeValueTemplate(namespaceAtt);
if (namespace instanceof StringLiteral) {
if (!AnyURIValue.isValidURI(((StringLiteral)namespace).getStringValue())) {
compileError("The value of the namespace attribute must be a valid URI", "XTDE0865");
}
}
}
if (selectAtt!=null) {
select = makeExpression(selectAtt);
}
if (separatorAtt == null) {
if (selectAtt == null) {
separator = new StringLiteral(StringValue.EMPTY_STRING);
} else {
separator = new StringLiteral(StringValue.SINGLE_SPACE);
}
} else {
separator = makeAttributeValueTemplate(separatorAtt);
}
if (validationAtt!=null) {
validationAction = Validation.getCode(validationAtt);
if (validationAction != Validation.STRIP && !getExecutable().isSchemaAware()) {
validationAction = Validation.STRIP;
compileError("To perform validation, a schema-aware XSLT processor is needed", "XTSE1660");
}
if (validationAction == Validation.INVALID) {
compileError("Invalid value of validation attribute", "XTSE0020");
validationAction = getContainingStylesheet().getDefaultValidation();
}
} else {
validationAction = getContainingStylesheet().getDefaultValidation();
}
if (typeAtt!=null) {
if (!getExecutable().isSchemaAware()) {
compileError(
"The @type attribute is available only with a schema-aware XSLT processor", "XTSE1660");
} else {
SchemaType type = getSchemaType(typeAtt);
if (type == null) {
compileError("Unknown attribute type " + typeAtt, "XTSE1520");
} else {
if (type.isSimpleType()) {
schemaType = (SimpleType)type;
} else {
compileError("Type annotation for attributes must be a simple type", "XTSE1530");
type = null;
}
}
validationAction = Validation.BY_TYPE;
}
}
if (typeAtt != null && validationAtt != null) {
compileError("The validation and type attributes are mutually exclusive", "XTSE1505");
validationAction = getContainingStylesheet().getDefaultValidation();
schemaType = null;
}
}
private void invalidAttributeName(String message) throws XPathException {
// if (forwardsCompatibleModeIsEnabled()) {
// DynamicError err = new XPathException(message);
// err.setErrorCode("XTDE0850");
// err.setLocator(this);
// attributeName = new ErrorExpression(err);
// } else {
compileError(message, "XTDE0850");
// prevent a duplicate error message...
attributeName = new StringLiteral("saxon-error-attribute");
// }
}
public void validate() throws XPathException {
if (schemaType != null) {
if (schemaType.isNamespaceSensitive()) {
compileError("Validation at attribute level must not specify a " +
"namespace-sensitive type (xs:QName or xs:NOTATION)", "XTTE1545");
}
}
attributeName = typeCheck("name", attributeName);
namespace = typeCheck("namespace", namespace);
select = typeCheck("select", select);
separator = typeCheck("separator", separator);
super.validate();
}
/**
* 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 "XTSE0840";
}
public Expression compile(Executable exec) throws XPathException {
NamespaceResolver nsContext = null;
int annotation = getTypeAnnotation(schemaType);
// deal specially with the case where the attribute name is known statically
if (attributeName instanceof StringLiteral) {
String qName = Whitespace.trim(((StringLiteral)attributeName).getStringValue());
String[] parts;
try {
parts = getConfiguration().getNameChecker().getQNameParts(qName);
} catch (QNameException e) {
// This can't happen, because of previous checks
return null;
}
if (namespace==null) {
String nsuri = "";
if (!parts[0].equals("")) {
nsuri = getURIForPrefix(parts[0], false);
if (nsuri == null) {
undeclaredNamespaceError(parts[0], "XTSE0280");
return null;
}
}
int nameCode = getNamePool().allocate(parts[0], nsuri, parts[1]);
FixedAttribute inst = new FixedAttribute(nameCode,
validationAction,
schemaType,
annotation);
inst.setContainer(this); // temporarily
compileContent(exec, inst, separator);
return inst;
} else if (namespace instanceof StringLiteral) {
String nsuri = ((StringLiteral)namespace).getStringValue();
if (nsuri.equals("")) {
parts[0] = "";
} else if (parts[0].equals("")) {
// Need to choose an arbitrary prefix
// First see if the requested namespace is declared in the stylesheet
AxisIterator iter = iterateAxis(Axis.NAMESPACE);
while (true) {
NodeInfo ns = (NodeInfo)iter.next();
if (ns == null) {
break;
}
if (ns.getStringValue().equals(nsuri)) {
parts[0] = ns.getLocalPart();
break;
}
}
// Otherwise see the URI is known to the namepool
if (parts[0].equals("")) {
String p = getNamePool().suggestPrefixForURI(
((StringLiteral)namespace).getStringValue());
if (p != null) {
parts[0] = p;
}
}
// Otherwise choose something arbitrary. This will get changed
// if it clashes with another attribute
if (parts[0].equals("")) {
parts[0] = "ns0";
}
}
int nameCode = getNamePool().allocate(parts[0], nsuri, parts[1]);
FixedAttribute inst = new FixedAttribute(nameCode,
validationAction,
schemaType,
annotation);
compileContent(exec, inst, separator);
return inst;
}
} else {
// if the namespace URI must be deduced at run-time from the attribute name
// prefix, we need to save the namespace context of the instruction
if (namespace==null) {
nsContext = makeNamespaceContext();
}
}
ComputedAttribute inst = new ComputedAttribute( attributeName,
namespace,
nsContext,
validationAction,
schemaType,
annotation,
false);
compileContent(exec, inst, separator);
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.
//