/*
* 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 javax.xml.namespace.QName;
import javax.xml.xpath.XPathVariableResolver;
import net.sf.saxon.Configuration;
import net.sf.saxon.type.AtomicType;
import net.sf.saxon.type.SchemaType;
import net.sf.saxon.type.ValidationException;
import net.sf.saxon.value.AtomicValue;
import net.sf.saxon.value.EmptySequence;
import net.sf.saxon.value.StringValue;
import net.sf.saxon.value.Value;
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.DOMUtils;
import org.apache.ode.utils.Namespaces;
import org.w3c.dom.Node;
/**
* @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;
private Configuration _config;
public JaxpVariableResolver(EvaluationContext ectx, OXPath10ExpressionBPEL20 oxpath, Configuration config) {
_ectx = ectx;
_oxpath = oxpath;
_config = config;
}
public Object resolveVariable(QName variableName) {
if (__log.isDebugEnabled()) {
__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();
} else if ("processQName".equals(variableName.getLocalPart())) {
return _ectx.getProcessQName();
}
if ("currentEventDateTime".equals(variableName.getLocalPart())) {
return _ectx.getCurrentEventDateTime();
}
}
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 {
final 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 used to expect a node list, but now a regular node will suffice.
return variableNode;
} catch (FaultException e) {
throw new WrappedResolverException(e);
}
}
}
public Value convertSimpleTypeToSaxon(QName type, String value) {
int fp = _config.getNamePool().allocate("", type.getNamespaceURI(), type.getLocalPart());
SchemaType type2 = _config.getSchemaType(fp);
if (type2 == null || !type2.isAtomicType()) {
__log.warn("Can't find simple type " + type + " value " + value + " result: " + null);
return null;
} else {
try {
AtomicValue value2 = StringValue.convertStringToAtomicType(value, (AtomicType) type2, null).asAtomic();
if (__log.isDebugEnabled()) {
__log.debug("converting " + type + " value " + value + " result: " + value2);
}
return value2;
} catch (ValidationException e) {
__log.debug("Can't convert " + value + " to " + type + " returning empty sequence");
return EmptySequence.getInstance();
}
}
}
public Object getSimpleContent(Node simpleNode, QName type) {
String text = simpleNode.getTextContent();
Object o = convertSimpleTypeToSaxon(type, text);
if (__log.isDebugEnabled()) {
__log.debug("getSimpleContent for " + DOMUtils.domToString(simpleNode) + " " + type + " returned " + o);
}
return o;
}
}