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.*;
import client.net.sf.saxon.ce.expr.instruct.Executable;
import client.net.sf.saxon.ce.expr.instruct.ValueOf;
import client.net.sf.saxon.ce.om.AttributeCollection;
import client.net.sf.saxon.ce.om.StandardNames;
import client.net.sf.saxon.ce.value.Whitespace;
import client.net.sf.saxon.ce.pattern.NodeKindTest;
import client.net.sf.saxon.ce.trans.XPathException;
import client.net.sf.saxon.ce.type.BuiltInAtomicType;
import client.net.sf.saxon.ce.type.ItemType;
import client.net.sf.saxon.ce.type.TypeHierarchy;
import client.net.sf.saxon.ce.value.Cardinality;
import client.net.sf.saxon.ce.value.StringValue;
/**
* An xsl:value-of element in the stylesheet. <br>
* The xsl:value-of element takes attributes:<ul>
* <li>a mandatory attribute select="expression".
* This must be a valid String expression</li>
* <li>an optional disable-output-escaping attribute, value "yes" or "no"</li>
* <li>an optional separator attribute</li>
* </ul>
*/
public final class XSLValueOf extends XSLLeafNodeConstructor {
private Expression separator;
private String selectAttTrace = "";
/**
* Determine the type of item returned by this instruction (only relevant if
* it is an instruction).
* @return the item type returned
*/
protected ItemType getReturnedItemType() {
return NodeKindTest.TEXT;
}
public void prepareAttributes() throws XPathException {
String selectAtt = null;
String disableAtt = null;
String separatorAtt = null;
AttributeCollection atts = getAttributeList();
for (int a=0; a<atts.getLength(); a++) {
int nc = atts.getNameCode(a);
String f = getNamePool().getClarkName(nc);
if (f.equals(StandardNames.DISABLE_OUTPUT_ESCAPING)) {
disableAtt = Whitespace.trim(atts.getValue(a));
} else if (f.equals(StandardNames.SELECT)) {
selectAtt = atts.getValue(a);
} else if (f.equals(StandardNames.SEPARATOR)) {
separatorAtt = atts.getValue(a);
} else {
checkUnknownAttribute(nc);
}
}
if (selectAtt!=null) {
select = makeExpression(selectAtt);
}
if (separatorAtt != null) {
separator = makeAttributeValueTemplate(separatorAtt);
}
if (disableAtt != null) {
if (disableAtt.equals("yes") || disableAtt.equals("no")) {
// do nothing
} else {
compileError("disable-output-escaping attribute must be either 'yes' or 'no'", "XTSE0020");
}
}
if (LogConfiguration.loggingIsEnabled() && LogController.traceIsEnabled()) {
selectAttTrace = selectAtt;
}
}
public void validate(Declaration decl) throws XPathException {
super.validate(decl);
select = typeCheck(select);
separator = typeCheck(separator);
}
/**
* 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 "XTSE0870";
}
public Expression compile(Executable exec, Declaration decl) throws XPathException {
final TypeHierarchy th = getConfiguration().getTypeHierarchy();
if (separator == null && select != null && xPath10ModeIsEnabled()) {
if (!select.getItemType(th).isAtomicType()) {
select = new Atomizer(select);
select = makeExpressionVisitor().simplify(select);
}
if (Cardinality.allowsMany(select.getCardinality())) {
select = new FirstItemExpression(select);
}
if (!th.isSubType(select.getItemType(th), BuiltInAtomicType.STRING)) {
select = new AtomicSequenceConverter(select, BuiltInAtomicType.STRING);
}
} else {
if (separator == null) {
if (select == null) {
separator = new StringLiteral(StringValue.EMPTY_STRING);
} else {
separator = new StringLiteral(StringValue.SINGLE_SPACE);
}
}
}
ValueOf inst = new ValueOf(select, false);
compileContent(exec, decl, inst, separator);
if (LogConfiguration.loggingIsEnabled() && LogController.traceIsEnabled()) {
inst.AddTraceProperty("select", selectAttTrace);
}
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.