/*
* 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.compiler.v2.xpath20;
import org.apache.ode.bpel.compiler.api.CompilationException;
import org.apache.ode.bpel.compiler.v2.CompilerContext;
import org.apache.ode.bpel.compiler.XPathMessages;
import org.apache.ode.bpel.compiler.WrappedResolverException;
import org.apache.ode.bpel.rtrep.v2.xpath10.OXPath10ExpressionBPEL20;
import org.apache.ode.bpel.rtrep.v2.OElementVarType;
import org.apache.ode.bpel.rtrep.v2.OLink;
import org.apache.ode.bpel.rtrep.v2.OMessageVarType;
import org.apache.ode.bpel.rtrep.v2.OScope;
import org.apache.ode.bpel.rtrep.v2.OVarType;
import org.apache.ode.bpel.rtrep.v2.OXsdTypeVarType;
import org.apache.ode.utils.DOMUtils;
import org.apache.ode.utils.Namespaces;
import org.apache.ode.utils.msg.MessageBundle;
import org.w3c.dom.Document;
import javax.xml.namespace.QName;
import javax.xml.xpath.XPathVariableResolver;
/**
* This is a mock implementation of the XPathVariableResolver for compilation. It
* always returns an empty string which allows execution of XPath expressions even
* if we don't have any values yet. This way we can easily rule out invalid variables
* and isolate properly BPEL variables.
* @author mriou <mriou at apache dot org>
*/
public class JaxpVariableResolver implements XPathVariableResolver {
private static final XPathMessages __msgs = MessageBundle.getMessages(XPathMessages.class);
private CompilerContext _cctx;
private OXPath10ExpressionBPEL20 _oxpath;
public JaxpVariableResolver(CompilerContext cctx, OXPath10ExpressionBPEL20 oxpath) {
_cctx = cctx;
_oxpath = oxpath;
}
public Object resolveVariable(QName variableName) {
// Custom variables
if ("ode".equals(variableName.getPrefix())
|| Namespaces.ODE_EXTENSION_NS.equals(variableName.getNamespaceURI())) {
if ("pid".equals(variableName.getLocalPart())) return "";
}
try {
String name = variableName.getLocalPart();
if(_oxpath.isJoinExpression) {
// these resolve to links
OLink olink = _cctx.resolveLink(name);
_oxpath.links.put(name, olink);
return Boolean.TRUE;
} else {
int dot = name.indexOf('.');
if (dot != -1)
name = name.substring(0,dot);
OScope.Variable var = _cctx.resolveVariable(name);
_oxpath.vars.put(name, var);
return extractValue(var, var.type);
}
} catch (CompilationException e) {
throw new WrappedResolverException(e);
}
}
private Object extractValue(OScope.Variable var, OVarType varType) {
if (varType instanceof OXsdTypeVarType) {
return generateFromType(((OXsdTypeVarType)varType).xsdType);
} else if (varType instanceof OElementVarType) {
return generateFromType(((OElementVarType)varType).elementType);
} else if (varType instanceof OMessageVarType) {
// MR That's an ugly hack but otherwise, xpath compilation doesn't work
if (((OMessageVarType)varType).parts.size() == 0)
throw new WrappedResolverException(__msgs.errExpressionMessageNoPart(var.name));
return extractValue(var, ((OMessageVarType)varType).parts.values().iterator().next().type);
}
return "";
}
private Object generateFromType(QName typeName) {
if (typeName.getNamespaceURI().equals(Namespaces.XML_SCHEMA)) {
if (typeName.getLocalPart().equals("int") ||
typeName.getLocalPart().equals("integer") ||
typeName.getLocalPart().equals("short") ||
typeName.getLocalPart().equals("long") ||
typeName.getLocalPart().equals("byte") ||
typeName.getLocalPart().equals("float") ||
typeName.getLocalPart().equals("double") ||
typeName.getLocalPart().equals("nonPositiveInteger") ||
typeName.getLocalPart().equals("nonNegativeInteger") ||
typeName.getLocalPart().equals("negativeInteger") ||
typeName.getLocalPart().equals("unsignedLong") ||
typeName.getLocalPart().equals("unsignedInt") ||
typeName.getLocalPart().equals("unsignedShort") ||
typeName.getLocalPart().equals("unsignedByte"))
return 0;
if (typeName.getLocalPart().equals("boolean"))
return Boolean.TRUE;
if (typeName.getLocalPart().equals("string"))
return "";
}
Document doc = DOMUtils.newDocument();
doc.appendChild(doc.createElement("empty"));
return doc.getDocumentElement();
}
}