package client.net.sf.saxon.ce.style;
import com.google.gwt.logging.client.LogConfiguration;
import client.net.sf.saxon.ce.LogController;
import client.net.sf.saxon.ce.expr.Expression;
import client.net.sf.saxon.ce.expr.Literal;
import client.net.sf.saxon.ce.expr.StringLiteral;
import client.net.sf.saxon.ce.expr.instruct.*;
import client.net.sf.saxon.ce.lib.StandardURIChecker;
import client.net.sf.saxon.ce.lib.Validation;
import client.net.sf.saxon.ce.om.*;
import client.net.sf.saxon.ce.trans.Err;
import client.net.sf.saxon.ce.trans.XPathException;
import client.net.sf.saxon.ce.value.EmptySequence;
import client.net.sf.saxon.ce.value.Whitespace;
/**
* An xsl:element element in the stylesheet. <br>
*/
public class XSLElement extends StyleElement {
private Expression elementName;
private Expression namespace = null;
private String use;
private AttributeSet[] attributeSets = null;
private boolean inheritNamespaces = true;
/**
* Determine whether this node is an instruction.
*
* @return true - it is an instruction
*/
public boolean isInstruction() {
return true;
}
/**
* Determine whether this type of element is allowed to contain a template-body
*
* @return true: yes, it may contain a template-body
*/
public boolean mayContainSequenceConstructor() {
return true;
}
public void prepareAttributes() throws XPathException {
AttributeCollection atts = getAttributeList();
String nameAtt = null;
String namespaceAtt = null;
String validationAtt = null;
String typeAtt = null;
String inheritAtt = null;
for (int a = 0; a < atts.getLength(); a++) {
int nc = atts.getNameCode(a);
String f = getNamePool().getClarkName(nc);
if (f.equals(StandardNames.NAME)) {
nameAtt = Whitespace.trim(atts.getValue(a));
} else if (f.equals(StandardNames.NAMESPACE)) {
namespaceAtt = atts.getValue(a);
} else if (f.equals(StandardNames.VALIDATION)) {
validationAtt = Whitespace.trim(atts.getValue(a));
} else if (f.equals(StandardNames.TYPE)) {
typeAtt = Whitespace.trim(atts.getValue(a));
} else if (f.equals(StandardNames.INHERIT_NAMESPACES)) {
inheritAtt = Whitespace.trim(atts.getValue(a));
} else if (f.equals(StandardNames.USE_ATTRIBUTE_SETS)) {
use = atts.getValue(a);
} else {
checkUnknownAttribute(nc);
}
}
if (nameAtt == null) {
reportAbsence("name");
} else {
elementName = makeAttributeValueTemplate(nameAtt);
if (elementName instanceof StringLiteral) {
if (!NameChecker.isQName(((StringLiteral)elementName).getStringValue())) {
compileError("Element name " +
Err.wrap(((StringLiteral)elementName).getStringValue(), Err.ELEMENT) +
" is not a valid QName", "XTDE0820");
// to prevent duplicate error messages:
elementName = new StringLiteral("saxon-error-element");
}
}
}
if (namespaceAtt != null) {
namespace = makeAttributeValueTemplate(namespaceAtt);
if (namespace instanceof StringLiteral) {
if (!StandardURIChecker.getInstance().isValidURI(((StringLiteral)namespace).getStringValue())) {
compileError("The value of the namespace attribute must be a valid URI", "XTDE0835");
}
}
}
if (validationAtt != null && Validation.getCode(validationAtt) != Validation.STRIP) {
compileError("To perform validation, a schema-aware XSLT processor is needed", "XTSE1660");
}
if (typeAtt!=null) {
compileError("The @type attribute is available only with a schema-aware XSLT processor", "XTSE1660");
}
if (inheritAtt != null) {
if (inheritAtt.equals("yes")) {
inheritNamespaces = true;
} else if (inheritAtt.equals("no")) {
inheritNamespaces = false;
} else {
compileError("The @inherit-namespaces attribute has permitted values (yes, no)", "XTSE0020");
}
}
}
public void validate(Declaration decl) throws XPathException {
if (use != null) {
// find any referenced attribute sets
attributeSets = getAttributeSets(use, null);
}
elementName = typeCheck(elementName);
namespace = typeCheck(namespace);
}
public Expression compile(Executable exec, Declaration decl) throws XPathException {
NamespaceResolver nsContext = null;
// deal specially with the case where the element name is known statically
if (elementName instanceof StringLiteral) {
CharSequence qName = ((StringLiteral)elementName).getStringValue();
String[] parts;
try {
parts = NameChecker.getQNameParts(qName);
} catch (QNameException e) {
compileError("Invalid element name: " + qName, "XTDE0820");
return null;
}
String nsuri = null;
if (namespace instanceof StringLiteral) {
nsuri = ((StringLiteral)namespace).getStringValue();
if (nsuri.length() == 0) {
parts[0] = "";
}
} else if (namespace == null) {
nsuri = getURIForPrefix(parts[0], true);
if (nsuri == null) {
undeclaredNamespaceError(parts[0], "XTDE0830");
}
}
if (nsuri != null) {
// Local name and namespace are both known statically: generate a FixedElement instruction
int nameCode = getNamePool().allocate(parts[0], nsuri, parts[1]);
FixedElement inst = new FixedElement(nameCode, null, inheritNamespaces);
inst.setBaseURI(getBaseURI());
if (LogConfiguration.loggingIsEnabled() && LogController.traceIsEnabled()) {
inst.AddTraceProperty("name", elementName);
}
return compileContentExpression(exec, decl, inst);
}
} else {
// if the namespace URI must be deduced at run-time from the element name
// prefix, we need to save the namespace context of the instruction
if (namespace == null) {
nsContext = this;
}
}
ComputedElement inst = new ComputedElement(elementName, namespace, nsContext, inheritNamespaces);
return compileContentExpression(exec, decl, inst);
}
private Expression compileContentExpression(Executable exec, Declaration decl, ElementCreator inst) throws XPathException {
Expression content = compileSequenceConstructor(exec, decl, iterateAxis(Axis.CHILD));
if (attributeSets != null) {
UseAttributeSets use = new UseAttributeSets(attributeSets);
if (content == null) {
content = use;
} else {
content = Block.makeBlock(use, content);
content.setSourceLocator(this);
}
}
if (content == null) {
content = new Literal(EmptySequence.getInstance());
}
inst.setContentExpression(content);
return inst;
}
}
// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
// This Source Code Form is “Incompatible With Secondary Licenses”, as defined by the Mozilla Public License, v. 2.0.