/**
* 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);
}
}