/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.ode.bpel.elang.xpath20.compiler;
import net.sf.saxon.expr.Expression;
import net.sf.saxon.trans.XPathException;
import net.sf.saxon.trans.StaticError;
import net.sf.saxon.xpath.XPathFunctionCall;
import javax.xml.namespace.QName;
import javax.xml.xpath.XPathFunction;
import javax.xml.xpath.XPathFunctionException;
import java.util.ArrayList;
/**
* Overloading the XPathFunctionLibrary to force it to initialize our functions giving
* the provided parameters. Otherwise the Saxon implemetation just never gives you
* any parameter before runtime.
* @author mriou <mriou at apache dot org>
*/
public class OdeXPathFunctionLibrary extends net.sf.saxon.xpath.XPathFunctionLibrary {
private static final long serialVersionUID = -8885396864277163797L;
private JaxpFunctionResolver _funcResolver;
public OdeXPathFunctionLibrary(JaxpFunctionResolver funcResolver) {
_funcResolver = funcResolver;
}
public Expression bind(int nameCode, String uri, String local, Expression[] staticArgs) throws XPathException {
QName name = new QName(uri, local);
XPathFunction function = _funcResolver.resolveFunction(name, staticArgs.length);
if (function == null) {
return null;
}
// Converting the expression array to the simple string
ArrayList args = new ArrayList(staticArgs.length);
for (Expression expression : staticArgs) {
String exprStr = expression.toString();
if (exprStr.startsWith("\"")) exprStr = exprStr.substring(1);
if (exprStr.endsWith("\"")) exprStr = exprStr.substring(0, exprStr.length() - 1);
args.add(exprStr);
}
try {
function.evaluate(args);
} catch (XPathFunctionException e) {
throw new StaticError(e);
}
XPathFunctionCall fc = new XPathFunctionCall(function);
fc.setArguments(staticArgs);
return fc;
}
}