| /* |
| * 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.runtime; |
| |
| import java.net.URI; |
| import java.util.Date; |
| import java.util.Map; |
| |
| import javax.xml.namespace.QName; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.ode.bpel.common.FaultException; |
| import org.apache.ode.bpel.evt.ScopeEvent; |
| import org.apache.ode.bpel.evt.VariableReadEvent; |
| import org.apache.ode.bpel.explang.EvaluationContext; |
| import org.apache.ode.bpel.explang.EvaluationException; |
| import org.apache.ode.bpel.obj.OConstantVarType; |
| import org.apache.ode.bpel.obj.OExpression; |
| import org.apache.ode.bpel.obj.OLink; |
| import org.apache.ode.bpel.obj.OMessageVarType; |
| import org.apache.ode.bpel.obj.OProcess; |
| import org.apache.ode.bpel.obj.OScope; |
| import org.apache.ode.bpel.obj.OMessageVarType.Part; |
| import org.w3c.dom.Element; |
| import org.w3c.dom.Node; |
| |
| /** |
| * The context in which BPEL expressions are evaluated. This class is handed of |
| * the {@link org.apache.ode.bpel.obj.OExpression} instances to provide access to |
| * variables, link statuses, and the like. |
| */ |
| public class ExprEvaluationContextImpl implements EvaluationContext { |
| private static final Log __log = LogFactory |
| .getLog(ExprEvaluationContextImpl.class); |
| |
| private BpelRuntimeContext _native; |
| |
| private ScopeFrame _scopeInstance; |
| |
| private Map<OLink, Boolean> _linkVals; |
| |
| private Node _root; |
| |
| public ExprEvaluationContextImpl(ScopeFrame scopeInstace, |
| BpelRuntimeContext ntv) { |
| _native = ntv; |
| _scopeInstance = scopeInstace; |
| } |
| |
| public ExprEvaluationContextImpl(ScopeFrame scopeInstace, |
| BpelRuntimeContext ntv, Node root) { |
| this(scopeInstace, ntv); |
| _root = root; |
| } |
| |
| public ExprEvaluationContextImpl(ScopeFrame scopeInstnce, |
| BpelRuntimeContext ntv, Map<OLink, Boolean> linkVals) { |
| this(scopeInstnce, ntv); |
| _linkVals = linkVals; |
| } |
| |
| public Node readVariable(OScope.Variable variable, OMessageVarType.Part part) |
| throws FaultException { |
| if (__log.isTraceEnabled()) |
| __log.trace("readVariable(" + variable + "," + part + ")"); |
| |
| // TODO: check for null _scopeInstance |
| |
| Node ret; |
| if (variable.getType() instanceof OConstantVarType) { |
| ret = ((OConstantVarType) variable.getType()).getValue(); |
| } else { |
| VariableInstance varInstance = _scopeInstance.resolve(variable); |
| if (varInstance == null) |
| return null; |
| VariableReadEvent vre = new VariableReadEvent(); |
| vre.setVarName(varInstance.declaration.getName()); |
| sendEvent(vre); |
| ret = _scopeInstance.fetchVariableData(_native,varInstance, part, false); |
| } |
| return ret; |
| } |
| |
| public Node evaluateQuery(Node root, OExpression expr) |
| throws FaultException, EvaluationException { |
| return _native.getExpLangRuntime() |
| .evaluateNode( |
| expr, |
| new ExprEvaluationContextImpl(_scopeInstance, |
| _native, root)); |
| } |
| |
| public String readMessageProperty(OScope.Variable variable, |
| OProcess.OProperty property) throws FaultException { |
| VariableInstance varInstance = _scopeInstance.resolve(variable); |
| return _native.readProperty(varInstance, property); |
| } |
| |
| public boolean isLinkActive(OLink olink) throws FaultException { |
| return _linkVals.get(olink); |
| } |
| |
| public String toString() { |
| return "{ExprEvaluationContextImpl scopeInstance=" + _scopeInstance |
| + ", activeLinks=" + _linkVals + "}"; |
| } |
| |
| public Node getRootNode() { |
| return _root; |
| } |
| |
| public Node getPartData(Element message, Part part) throws FaultException { |
| return _scopeInstance.getPartData(message, part); |
| } |
| |
| public Long getProcessId() { |
| return _native.getPid(); |
| } |
| |
| public boolean narrowTypes() { |
| return true; |
| } |
| |
| private void sendEvent(ScopeEvent se) { |
| _scopeInstance.fillEventInfo(se); |
| _native.sendEvent(se); |
| } |
| |
| public URI getBaseResourceURI() { |
| return _native.getBaseResourceURI(); |
| } |
| |
| public Node getPropertyValue(QName propertyName) { |
| return _native.getProcessProperty(propertyName); |
| } |
| |
| public QName getProcessQName() { |
| return _native.getProcessQName(); |
| } |
| |
| public Date getCurrentEventDateTime() { |
| return _native.getCurrentEventDateTime(); |
| } |
| } |