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org.jbpm.bpmn2.xml.DefinitionsHandler Maven / Gradle / Ivy
/**
* 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.bpmn2.xml;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import org.drools.core.process.core.datatype.DataType;
import org.drools.core.process.core.datatype.impl.type.BooleanDataType;
import org.drools.core.process.core.datatype.impl.type.FloatDataType;
import org.drools.core.process.core.datatype.impl.type.IntegerDataType;
import org.drools.core.process.core.datatype.impl.type.ObjectDataType;
import org.drools.core.process.core.datatype.impl.type.StringDataType;
import org.drools.core.process.core.datatype.impl.type.UndefinedDataType;
import org.drools.core.xml.BaseAbstractHandler;
import org.drools.core.xml.ExtensibleXmlParser;
import org.drools.core.xml.Handler;
import org.jbpm.bpmn2.core.Definitions;
import org.jbpm.bpmn2.core.Interface;
import org.jbpm.bpmn2.core.ItemDefinition;
import org.jbpm.bpmn2.core.Interface.Operation;
import org.jbpm.compiler.xml.ProcessBuildData;
import org.jbpm.process.core.ContextContainer;
import org.jbpm.process.core.context.variable.Variable;
import org.jbpm.process.core.context.variable.VariableScope;
import org.jbpm.ruleflow.core.RuleFlowProcess;
import org.jbpm.workflow.core.NodeContainer;
import org.jbpm.workflow.core.node.ForEachNode;
import org.jbpm.workflow.core.node.WorkItemNode;
import org.kie.api.definition.process.Node;
import org.kie.api.definition.process.Process;
import org.w3c.dom.Element;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
public class DefinitionsHandler extends BaseAbstractHandler implements Handler {
@SuppressWarnings("unchecked")
public DefinitionsHandler() {
if ((this.validParents == null) && (this.validPeers == null)) {
this.validParents = new HashSet();
this.validParents.add(null);
this.validPeers = new HashSet();
this.validPeers.add(null);
this.allowNesting = false;
}
}
public Object start(final String uri, final String localName,
final Attributes attrs, final ExtensibleXmlParser parser)
throws SAXException {
parser.startElementBuilder(localName, attrs);
return new Definitions();
}
public Object end(final String uri, final String localName,
final ExtensibleXmlParser parser) throws SAXException {
final Element element = parser.endElementBuilder();
Definitions definitions = (Definitions) parser.getCurrent();
String namespace = element.getAttribute("targetNamespace");
List processes = ((ProcessBuildData) parser.getData()).getProcesses();
Map itemDefinitions = (Map)
((ProcessBuildData) parser.getData()).getMetaData("ItemDefinitions");
List interfaces = (List) ((ProcessBuildData) parser.getData()).getMetaData("Interfaces");
for (Process process : processes) {
RuleFlowProcess ruleFlowProcess = (RuleFlowProcess)process;
ruleFlowProcess.setMetaData("TargetNamespace", namespace);
postProcessItemDefinitions(ruleFlowProcess, itemDefinitions, parser.getClassLoader());
postProcessInterfaces(ruleFlowProcess, interfaces);
}
definitions.setTargetNamespace(namespace);
return definitions;
}
public Class generateNodeFor() {
return Definitions.class;
}
private void postProcessInterfaces(NodeContainer nodeContainer, List interfaces) {
for (Node node: nodeContainer.getNodes()) {
if (node instanceof NodeContainer) {
postProcessInterfaces((NodeContainer) node, interfaces);
}
if (node instanceof WorkItemNode && "Service Task".equals(((WorkItemNode) node).getMetaData("Type"))) {
WorkItemNode workItemNode = (WorkItemNode) node;
if (interfaces == null) {
throw new IllegalArgumentException("No interfaces found");
}
String operationRef = (String) workItemNode.getMetaData("OperationRef");
String implementation = (String) workItemNode.getMetaData("Implementation");
Operation operation = null;
for (Interface i: interfaces) {
operation = i.getOperation(operationRef);
if (operation != null) {
break;
}
}
if (operation == null) {
throw new IllegalArgumentException("Could not find operation " + operationRef);
}
// avoid overriding parameters set by data input associations
if (workItemNode.getWork().getParameter("Interface") == null) {
workItemNode.getWork().setParameter("Interface", operation.getInterface().getName());
}
if (workItemNode.getWork().getParameter("Operation") == null) {
workItemNode.getWork().setParameter("Operation", operation.getName());
}
if (workItemNode.getWork().getParameter("ParameterType") == null) {
workItemNode.getWork().setParameter("ParameterType", operation.getMessage().getType());
}
// parameters to support web service invocation
if (implementation != null) {
workItemNode.getWork().setParameter("interfaceImplementationRef", operation.getInterface().getImplementationRef());
workItemNode.getWork().setParameter("operationImplementationRef", operation.getImplementationRef());
workItemNode.getWork().setParameter("implementation", implementation);
}
}
}
}
private void postProcessItemDefinitions(NodeContainer nodeContainer, Map itemDefinitions, ClassLoader cl) {
if (nodeContainer instanceof ContextContainer) {
setVariablesDataType((ContextContainer) nodeContainer, itemDefinitions, cl);
}
// process composite context node of for each to enhance its variables with types
if (nodeContainer instanceof ForEachNode) {
setVariablesDataType(((ForEachNode) nodeContainer).getCompositeNode(), itemDefinitions, cl);
}
for (Node node: nodeContainer.getNodes()) {
if (node instanceof NodeContainer) {
postProcessItemDefinitions((NodeContainer) node, itemDefinitions, cl);
}
if (node instanceof ContextContainer) {
setVariablesDataType((ContextContainer) node, itemDefinitions, cl);
}
}
}
private void setVariablesDataType(ContextContainer container, Map itemDefinitions, ClassLoader cl) {
VariableScope variableScope = (VariableScope) container.getDefaultContext(VariableScope.VARIABLE_SCOPE);
if (variableScope != null) {
for (Variable variable: variableScope.getVariables()) {
setVariableDataType(variable, itemDefinitions, cl);
}
}
}
private void setVariableDataType(Variable variable, Map itemDefinitions, ClassLoader cl) {
// retrieve type from item definition
String itemSubjectRef = (String) variable.getMetaData("ItemSubjectRef");
if (UndefinedDataType.getInstance().equals(variable.getType()) && itemDefinitions != null && itemSubjectRef != null) {
DataType dataType = new ObjectDataType();
ItemDefinition itemDefinition = itemDefinitions.get(itemSubjectRef);
if (itemDefinition != null) {
String structureRef = itemDefinition.getStructureRef();
if ("java.lang.Boolean".equals(structureRef) || "Boolean".equals(structureRef)) {
dataType = new BooleanDataType();
} else if ("java.lang.Integer".equals(structureRef) || "Integer".equals(structureRef)) {
dataType = new IntegerDataType();
} else if ("java.lang.Float".equals(structureRef) || "Float".equals(structureRef)) {
dataType = new FloatDataType();
} else if ("java.lang.String".equals(structureRef) || "String".equals(structureRef)) {
dataType = new StringDataType();
} else if ("java.lang.Object".equals(structureRef) || "Object".equals(structureRef)) {
// use FQCN of Object
dataType = new ObjectDataType("java.lang.Object");
} else {
dataType = new ObjectDataType(structureRef, cl);
}
}
variable.setType(dataType);
}
}
}
