/** * Copyright 2010 Red Hat, Inc. and/or its affiliates. * * Licensed 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.jbpm.workflow.instance.impl; import java.util.HashMap; import java.util.Map; import org.jbpm.process.core.context.variable.VariableScope; import org.jbpm.process.instance.context.variable.VariableScopeInstance; import org.jbpm.workflow.instance.NodeInstance; import org.mvel2.integration.VariableResolver; import org.mvel2.integration.impl.ImmutableDefaultFactory; import org.mvel2.integration.impl.SimpleValueResolver; public class NodeInstanceResolverFactory extends ImmutableDefaultFactory { private static final long serialVersionUID = 510l; private NodeInstance nodeInstance; private Map<String, Object> extraParameters = new HashMap<String, Object>(); public NodeInstanceResolverFactory(NodeInstance nodeInstance) { this.nodeInstance = nodeInstance; this.extraParameters.put("nodeInstance", nodeInstance); if (nodeInstance.getProcessInstance() != null) { this.extraParameters.put("processInstance", nodeInstance.getProcessInstance()); this.extraParameters.put("processInstanceId", nodeInstance.getProcessInstance().getId()); this.extraParameters.put("parentProcessInstanceId", nodeInstance.getProcessInstance().getParentProcessInstanceId()); } } public boolean isResolveable(String name) { boolean found = nodeInstance.resolveContextInstance(VariableScope.VARIABLE_SCOPE, name) != null; if (!found) { return extraParameters.containsKey(name); } return found; } public VariableResolver getVariableResolver(String name) { if (extraParameters.containsKey(name)) { return new SimpleValueResolver(extraParameters.get(name)); } Object value = ((VariableScopeInstance) nodeInstance.resolveContextInstance( VariableScope.VARIABLE_SCOPE, name)).getVariable(name); return new SimpleValueResolver(value); } }