/*
* 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.runtime;
import net.sf.saxon.value.DateTimeValue;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.ode.bpel.common.FaultException;
import org.apache.ode.bpel.elang.xpath10.o.OXPath10ExpressionBPEL20;
import org.apache.ode.bpel.elang.xpath20.compiler.WrappedResolverException;
import org.apache.ode.bpel.explang.EvaluationContext;
import org.apache.ode.bpel.o.OLink;
import org.apache.ode.bpel.o.OMessageVarType;
import org.apache.ode.bpel.o.OScope;
import org.apache.ode.bpel.o.OXsdTypeVarType;
import org.apache.ode.utils.Namespaces;
import org.apache.ode.utils.xsd.XSTypes;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import javax.xml.namespace.QName;
import javax.xml.xpath.XPathVariableResolver;
import java.util.Calendar;
/**
* @author mriou <mriou at apache dot org>
*/
public class JaxpVariableResolver implements XPathVariableResolver {
private static final Log __log = LogFactory.getLog(JaxpVariableResolver.class);
private EvaluationContext _ectx;
private OXPath10ExpressionBPEL20 _oxpath;
public JaxpVariableResolver(EvaluationContext ectx, OXPath10ExpressionBPEL20 oxpath) {
_ectx = ectx;
_oxpath = oxpath;
}
public Object resolveVariable(QName variableName) {
__log.debug("Resolving variable " + variableName);
if(!(_oxpath instanceof OXPath10ExpressionBPEL20)){
throw new IllegalStateException("XPath variables not supported for bpel 1.1");
}
// Custom variables
if (variableName.getNamespaceURI().equals(Namespaces.ODE_EXTENSION_NS)) {
if ("pid".equals(variableName.getLocalPart())) {
return _ectx.getProcessId();
}
}
OXPath10ExpressionBPEL20 expr = _oxpath;
if(expr.isJoinExpression){
OLink olink = _oxpath.links.get(variableName.getLocalPart());
try {
return _ectx.isLinkActive(olink) ? Boolean.TRUE : Boolean.FALSE;
} catch (FaultException e) {
throw new WrappedResolverException(e);
}
}else{
String varName;
String partName;
int dotloc = variableName.getLocalPart().indexOf('.');
if (dotloc == -1) {
varName = variableName.getLocalPart();
partName = null;
} else {
varName = variableName.getLocalPart().substring(0, dotloc);
partName = variableName.getLocalPart().substring(dotloc + 1);
}
OScope.Variable variable = _oxpath.vars.get(varName);
OMessageVarType.Part part = partName == null ? null : ((OMessageVarType)variable.type).parts.get(partName);
try{
Node variableNode = _ectx.readVariable(variable, part);
if (variableNode == null)
throw new FaultException(variable.getOwner().constants.qnSelectionFailure,
"Unknown variable " + variableName.getLocalPart());
if (_ectx.narrowTypes()) {
if (variable.type instanceof OXsdTypeVarType && ((OXsdTypeVarType)variable.type).simple)
return getSimpleContent(variableNode,((OXsdTypeVarType)variable.type).xsdType);
if (part != null && part.type instanceof OXsdTypeVarType && ((OXsdTypeVarType)part.type).simple)
return getSimpleContent(variableNode,((OXsdTypeVarType)part.type).xsdType);
}
// Saxon expects a node list, this nodelist should contain exactly one item, the attribute
// value
return new SingletonNodeList(variableNode);
}catch(FaultException e){
throw new WrappedResolverException(e);
}
}
}
private Object getSimpleContent(Node simpleNode, QName type) {
String text = simpleNode.getTextContent();
try {
Object jobj = XSTypes.toJavaObject(type,text);
// Saxon wants its own dateTime type and doesn't like Calendar or Date
if (jobj instanceof Calendar) return new DateTimeValue((Calendar) jobj, true);
else return jobj;
} catch (Exception e) { }
// Elegant way failed, trying brute force
try {
return Integer.valueOf(text);
} catch (NumberFormatException e) { }
try {
return Double.valueOf(text);
} catch (NumberFormatException e) { }
// Remember: always a node set
if (simpleNode.getParentNode() != null)
return simpleNode.getParentNode().getChildNodes();
else return text;
}
private static class SingletonNodeList implements NodeList {
private Node _node;
SingletonNodeList(Node node) {
_node = node;
}
public Node item(int index) {
if (index != 0)
throw new IndexOutOfBoundsException(""+index);
return _node;
}
public int getLength() {
return 1;
}
}
}