package net.sf.saxon.style;
import net.sf.saxon.expr.*;
import net.sf.saxon.instruct.Executable;
import net.sf.saxon.instruct.ValueOf;
import net.sf.saxon.om.AttributeCollection;
import net.sf.saxon.om.StandardNames;
import net.sf.saxon.pattern.NodeKindTest;
import net.sf.saxon.trans.XPathException;
import net.sf.saxon.type.BuiltInAtomicType;
import net.sf.saxon.type.ItemType;
import net.sf.saxon.type.TypeHierarchy;
import net.sf.saxon.value.Cardinality;
import net.sf.saxon.value.StringValue;
import net.sf.saxon.value.Whitespace;
/**
* 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 XSLStringConstructor {
private boolean disable = false;
private Expression separator;
/**
* 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")) {
disable = true;
} else if (disableAtt.equals("no")) {
disable = false;
} else {
compileError("disable-output-escaping attribute must be either 'yes' or 'no'", "XTSE0020");
}
}
}
public void validate() throws XPathException {
super.validate();
select = typeCheck("select", select);
separator = typeCheck("separator", 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) throws XPathException {
final TypeHierarchy th = getConfiguration().getTypeHierarchy();
if (separator == null && select != null && backwardsCompatibleModeIsEnabled()) {
if (!select.getItemType(th).isAtomicType()) {
select = new Atomizer(select, getStaticContext().getConfiguration());
}
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, disable, 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.
//