package net.sf.saxon.style;
import net.sf.saxon.Err;
import net.sf.saxon.expr.*;
import net.sf.saxon.instruct.ApplyTemplates;
import net.sf.saxon.instruct.Executable;
import net.sf.saxon.om.*;
import net.sf.saxon.sort.SortExpression;
import net.sf.saxon.sort.SortKeyDefinition;
import net.sf.saxon.trans.Mode;
import net.sf.saxon.trans.XPathException;
import net.sf.saxon.type.Type;
import net.sf.saxon.value.SequenceType;
import net.sf.saxon.value.Whitespace;
/**
* An xsl:apply-templates element in the stylesheet
*/
public class XSLApplyTemplates extends StyleElement {
private Expression select;
private StructuredQName modeName; // null if no name specified or if conventional values such as #current used
private boolean useCurrentMode = false;
private boolean useTailRecursion = false;
private Mode mode;
private String modeAttribute;
private boolean implicitSelect = false;
/**
* Determine whether this node is an instruction.
* @return true - it is an instruction
*/
public boolean isInstruction() {
return true;
}
public void prepareAttributes() throws XPathException {
AttributeCollection atts = getAttributeList();
String selectAtt = null;
for (int a=0; a<atts.getLength(); a++) {
int nc = atts.getNameCode(a);
String f = getNamePool().getClarkName(nc);
if (f.equals(StandardNames.MODE)) {
modeAttribute = Whitespace.trim(atts.getValue(a));
} else if (f.equals(StandardNames.SELECT)) {
selectAtt = atts.getValue(a);
} else {
checkUnknownAttribute(nc);
}
}
if (modeAttribute!=null) {
if (modeAttribute.equals("#current")) {
useCurrentMode = true;
} else if (modeAttribute.equals("#default")) {
// do nothing;
} else {
try {
modeName = makeQName(modeAttribute);
} catch (NamespaceException err) {
compileError(err.getMessage(), "XTSE0280");
modeName = null;
} catch (XPathException err) {
compileError("Mode name " + Err.wrap(modeAttribute) + " is not a valid QName", "XTSE0280");
modeName = null;
}
}
}
if (selectAtt!=null) {
select = makeExpression(selectAtt);
}
}
public void validate() throws XPathException {
//checkWithinTemplate();
// get the Mode object
if (!useCurrentMode) {
mode = getPrincipalStylesheet().getRuleManager().getMode(modeName, true);
}
// handle sorting if requested
AxisIterator kids = iterateAxis(Axis.CHILD);
while (true) {
NodeInfo child = (NodeInfo)kids.next();
if (child == null) {
break;
}
if (child instanceof XSLSort) {
// no-op
} else if (child instanceof XSLWithParam) {
// usesParams = true;
} else if (child.getNodeKind() == Type.TEXT) {
// with xml:space=preserve, white space nodes may still be there
if (!Whitespace.isWhite(child.getStringValueCS())) {
compileError("No character data is allowed within xsl:apply-templates", "XTSE0010");
}
} else {
compileError("Invalid element within xsl:apply-templates", "XTSE0010");
}
}
if (select==null) {
select = new AxisExpression(Axis.CHILD, null);
implicitSelect = true;
}
select = typeCheck("select", select);
try {
RoleLocator role =
new RoleLocator(RoleLocator.INSTRUCTION, "xsl:apply-templates/select", 0, null);
role.setSourceLocator(new ExpressionLocation(this));
role.setErrorCode("XTTE0520");
select = TypeChecker.staticTypeCheck(select,
SequenceType.NODE_SEQUENCE,
false, role, makeExpressionVisitor());
} catch (XPathException err) {
compileError(err);
}
}
/**
* Mark tail-recursive calls on templates and functions.
* For most instructions, this does nothing.
*/
public void markTailCalls() {
useTailRecursion = true;
}
public Expression compile(Executable exec) throws XPathException {
SortKeyDefinition[] sortKeys = makeSortKeys();
if (sortKeys != null) {
useTailRecursion = false;
}
Expression sortedSequence = select;
if (sortKeys != null) {
sortedSequence = new SortExpression(select, sortKeys);
}
compileSequenceConstructor(exec, iterateAxis(Axis.CHILD), true);
ApplyTemplates app = new ApplyTemplates(
sortedSequence,
useCurrentMode,
useTailRecursion,
mode,
backwardsCompatibleModeIsEnabled(),
implicitSelect);
app.setActualParameters(getWithParamInstructions(exec, false, app),
getWithParamInstructions(exec, true, app));
return app;
}
}
//
// 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.
//