package org.pdf4j.saxon.functions;
import org.pdf4j.saxon.expr.XPathContext;
import org.pdf4j.saxon.om.Item;
import org.pdf4j.saxon.sort.GenericAtomicComparer;
import org.pdf4j.saxon.trans.XPathException;
import org.pdf4j.saxon.value.AtomicValue;
import org.pdf4j.saxon.value.Int64Value;
/**
* XSLT 2.0 compare() function
*/
// Supports string comparison using a collation
public class Compare extends CollatingFunction {
/**
* Evaluate the expression
*/
public Item evaluateItem(XPathContext context) throws XPathException {
AtomicValue arg0 = (AtomicValue)argument[0].evaluateItem(context);
if (arg0==null) {
return null;
}
AtomicValue arg1 = (AtomicValue)argument[1].evaluateItem(context);
if (arg1==null) {
return null;
}
GenericAtomicComparer collator = getAtomicComparer(2, context);
int result = collator.compareAtomicValues(arg0, arg1);
if (result < 0) {
return Int64Value.MINUS_ONE;
} else if (result > 0) {
return Int64Value.PLUS_ONE;
} else {
return Int64Value.ZERO;
}
}
}
//
// 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.
//