package com.xmlcalabash.functions;
import com.xmlcalabash.core.XProcException;
import com.xmlcalabash.runtime.XCompoundStep;
import com.xmlcalabash.runtime.XStep;
import net.sf.saxon.lib.ExtensionFunctionCall;
import net.sf.saxon.lib.ExtensionFunctionDefinition;
import net.sf.saxon.om.Sequence;
import net.sf.saxon.om.StructuredQName;
import net.sf.saxon.om.SequenceIterator;
import net.sf.saxon.tree.iter.SingletonIterator;
import net.sf.saxon.value.SequenceType;
import net.sf.saxon.value.AnyURIValue;
import net.sf.saxon.expr.XPathContext;
import net.sf.saxon.trans.XPathException;
import com.xmlcalabash.core.XProcConstants;
import com.xmlcalabash.core.XProcRuntime;
//
// 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 Norman Walsh are Copyright (C) Mark Logic Corporation. All Rights Reserved.
//
// Contributor(s): Norman Walsh.
//
/**
* Implementation of the exf:cwd() function
*/
public class Cwd extends XProcExtensionFunctionDefinition {
private static StructuredQName funcname = new StructuredQName("exf", XProcConstants.NS_EXPROC_FUNCTIONS,"cwd");
protected Cwd() {
// you can't call this one
}
public Cwd(XProcRuntime runtime) {
registry.registerRuntime(this, runtime);
}
public StructuredQName getFunctionQName() {
return funcname;
}
public int getMinimumNumberOfArguments() {
return 0;
}
public int getMaximumNumberOfArguments() {
return 0;
}
public SequenceType[] getArgumentTypes() {
return new SequenceType[]{SequenceType.OPTIONAL_NUMERIC};
}
public SequenceType getResultType(SequenceType[] suppliedArgumentTypes) {
return SequenceType.SINGLE_ATOMIC;
}
public ExtensionFunctionCall makeCallExpression() {
return new CwdCall(this);
}
private class CwdCall extends ExtensionFunctionCall {
private XProcExtensionFunctionDefinition xdef = null;
public CwdCall(XProcExtensionFunctionDefinition def) {
xdef = def;
}
public Sequence call(XPathContext xPathContext, Sequence[] sequences) throws XPathException {
XProcRuntime runtime = registry.getRuntime(xdef);
XStep step = runtime.getXProcData().getStep();
// FIXME: this can't be the best way to do this...
// step == null in use-when
if (step != null && !(step instanceof XCompoundStep)) {
throw XProcException.dynamicError(23);
}
// In 0.9.20, I removed the trailing slash from cwd().
// The community didn't like that, so I put it back.
String cwd = runtime.getStaticBaseURI().toASCIIString();
return new AnyURIValue(cwd);
}
}
}