package net.sf.saxon.functions;
import net.sf.saxon.Controller;
import net.sf.saxon.AugmentedSource;
import net.sf.saxon.event.Builder;
import net.sf.saxon.event.Receiver;
import net.sf.saxon.event.Sender;
import net.sf.saxon.expr.Expression;
import net.sf.saxon.expr.ExpressionVisitor;
import net.sf.saxon.expr.XPathContext;
import net.sf.saxon.om.Item;
import net.sf.saxon.trans.XPathException;
import net.sf.saxon.value.AtomicValue;
import net.sf.saxon.value.Whitespace;
import org.xml.sax.InputSource;
import javax.xml.transform.sax.SAXSource;
import javax.xml.transform.Source;
import java.io.StringReader;
/**
* This class implements the saxon:parse() extension function,
* which is specially-recognized by the system because it needs access
* to parts of the static context
*/
public class Parse extends SystemFunction {
String baseURI;
/**
* Method supplied by each class of function to check arguments during parsing, when all
* the argument expressions have been read
*/
public void checkArguments(ExpressionVisitor visitor) throws XPathException {
if (baseURI == null) {
super.checkArguments(visitor);
baseURI = visitor.getStaticContext().getBaseURI();
}
}
/**
* Pre-evaluate a function at compile time. Static evaluation is suppressed for
* saxon:parse because no controller is available.
* @param visitor an expression visitor
*/
public Expression preEvaluate(ExpressionVisitor visitor) throws XPathException {
return this;
}
/**
* Evaluate in a general context
*/
public Item evaluateItem(XPathContext c) throws XPathException {
Controller controller = c.getController();
AtomicValue content = (AtomicValue)argument[0].evaluateItem(c);
StringReader sr = new StringReader(content.getStringValue());
InputSource is = new InputSource(sr);
is.setSystemId(baseURI);
Source source = new SAXSource(is);
source.setSystemId(baseURI);
Builder b = controller.makeBuilder();
Receiver s = b;
source = AugmentedSource.makeAugmentedSource(source);
((AugmentedSource)source).setStripSpace(Whitespace.XSLT);
if (controller.getExecutable().stripsInputTypeAnnotations()) {
s = controller.getConfiguration().getAnnotationStripper(s);
}
try {
new Sender(controller.makePipelineConfiguration()).send(source, s);
return b.getCurrentRoot();
} catch (XPathException err) {
throw new XPathException(err);
}
}
}
//
// 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.
//