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com.gs.dmn.signavio.extension.SignavioExtension Maven / Gradle / Ivy
/*
* Copyright 2016 Goldman Sachs.
*
* 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 com.gs.dmn.signavio.extension;
import com.gs.dmn.ast.*;
import com.gs.dmn.runtime.DMNRuntimeException;
import com.gs.dmn.runtime.metadata.ExtensionElement;
import com.gs.dmn.runtime.metadata.MultiInstanceDecisionLogicExtension;
import com.gs.dmn.signavio.SignavioDMNModelRepository;
import com.gs.dmn.signavio.serialization.xstream.ReferencedService;
import org.apache.commons.lang3.StringUtils;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import javax.xml.XMLConstants;
import java.util.ArrayList;
import java.util.List;
import static com.gs.dmn.serialization.DMNVersion.LATEST;
public class SignavioExtension {
public static final String SIG_EXT_NAMESPACE = "http://www.signavio.com/schema/dmn/1.1/";
private final SignavioDMNModelRepository dmnModelRepository;
public SignavioExtension(SignavioDMNModelRepository dmnModelRepository) {
this.dmnModelRepository = dmnModelRepository;
}
//
// Decision services
//
public TDecisionService referencedService(TBusinessKnowledgeModel bkm) {
TDMNElement.ExtensionElements extensionElements = bkm.getExtensionElements();
List extensions = findExtensions(extensionElements, dmnModelRepository.getSchemaNamespace(), "referencedService");
if (extensions.isEmpty()) {
return null;
} else {
Object extension = extensions.get(0);
if (extension instanceof ReferencedService) {
ReferencedService referencedService = (ReferencedService) extension;
String serviceId = referencedService.getHref();
TDefinitions definitions = dmnModelRepository.getRootDefinitions();
return decisionService(definitions, serviceId);
} else {
String serviceId = getAttributeByName((Element) extension, "href");
TDefinitions definitions = dmnModelRepository.getRootDefinitions();
return decisionService(definitions, serviceId);
}
}
}
private TDecisionService decisionService(TDefinitions definitions, String serviceId) {
List elementList = findExtensions(definitions.getExtensionElements(), LATEST.getNamespace(), "decisionService");
for (Object element: elementList) {
if (element instanceof TDecisionService && dmnModelRepository.sameId((TNamedElement) element, serviceId)) {
return (TDecisionService) element;
}
}
throw new DMNRuntimeException(String.format("Cannot find Decision service '%s'", serviceId));
}
private boolean hasName(Object extension, String namespace, String tagName) {
if (extension instanceof Element) {
Element element = (Element) extension;
String namespaceURI = element.getNamespaceURI();
String name = element.getLocalName();
return tagName.equals(name) && namespace.equals(namespaceURI);
} else if (extension instanceof TDecisionService) {
return tagName.equals("decisionService");
} else if (extension instanceof ReferencedService) {
return tagName.equals("referencedService");
} else if (extension instanceof com.gs.dmn.signavio.serialization.xstream.MultiInstanceDecisionLogic) {
return tagName.equals("MultiInstanceDecisionLogic");
}
return false;
}
//
// Multi Instance decisions
//
public boolean isMultiInstanceDecision(TDRGElement element) {
try {
List extensions = findExtensions(element.getExtensionElements(), dmnModelRepository.getSchemaNamespace(), "MultiInstanceDecisionLogic");
return extensions != null && extensions.size() == 1;
} catch (Exception e) {
return false;
}
}
public MultiInstanceDecisionLogic multiInstanceDecisionLogic(TDRGElement element) {
List extensions = findExtensions(element.getExtensionElements(), dmnModelRepository.getSchemaNamespace(), "MultiInstanceDecisionLogic");
Object extension = extensions.get(0);
String iterationExpression;
String iteratorShapeId;
String aggregationFunction;
String topLevelDecisionId;
if (extension instanceof com.gs.dmn.signavio.serialization.xstream.MultiInstanceDecisionLogic) {
com.gs.dmn.signavio.serialization.xstream.MultiInstanceDecisionLogic decisionElement = (com.gs.dmn.signavio.serialization.xstream.MultiInstanceDecisionLogic) extension;
iterationExpression = decisionElement.getIterationExpression();
iteratorShapeId = decisionElement.getIteratorShapeId();
aggregationFunction = decisionElement.getAggregationFunction();
topLevelDecisionId = decisionElement.getTopLevelDecisionId();
} else {
Element decisionElement = (Element) extension;
iterationExpression = getElementsByTagName(decisionElement, "iterationExpression").item(0).getTextContent();
iteratorShapeId = getElementsByTagName(decisionElement, "iteratorShapeId").item(0).getTextContent();
aggregationFunction = getElementsByTagName(decisionElement, "aggregationFunction").item(0).getTextContent();
topLevelDecisionId = getElementsByTagName(decisionElement, "topLevelDecisionId").item(0).getTextContent();
}
TDRGElement iterator = findDRGElementByPartialId(iteratorShapeId);
Aggregator aggregator = Aggregator.valueOf(aggregationFunction);
TDRGElement topLevelDecision = findDRGElementByPartialId(topLevelDecisionId);
return new MultiInstanceDecisionLogic(iterationExpression, iterator, aggregator, (TDecision) topLevelDecision);
}
//
// Manifest
//
public ExtensionElement makeMultiInstanceExtension(TDecision decision) {
MultiInstanceDecisionLogic multiInstanceDecisionLogic = multiInstanceDecisionLogic(decision);
String topLevelDecisionId = multiInstanceDecisionLogic.getTopLevelDecision().getId();
String aggregator = multiInstanceDecisionLogic.getAggregator().name();
String iteratorId = multiInstanceDecisionLogic.getIterator().getId();
String iterationExpression = multiInstanceDecisionLogic.getIterationExpression();
return new MultiInstanceDecisionLogicExtension(iterationExpression, iteratorId, aggregator, topLevelDecisionId);
}
//
// Common
//
private TDRGElement findDRGElementByPartialId(String iteratorShapeId) {
String suffix = iteratorShapeId.substring(3);
for (TDefinitions definitions: this.dmnModelRepository.getAllDefinitions()) {
for (TDRGElement element: this.dmnModelRepository.findDRGElements(definitions)) {
if (element.getId().endsWith(suffix)) {
return element;
}
}
}
return null;
}
public List findExtensions(TDMNElement.ExtensionElements extensionElements, String namespace, String extensionName) {
List extensions = new ArrayList<>();
if (extensionElements != null && extensionElements.getAny() != null && !extensionElements.getAny().isEmpty()) {
List any = extensionElements.getAny();
for (Object extension : any) {
if (hasName(extension, namespace, extensionName)) {
extensions.add(extension);
}
}
}
return extensions;
}
private String getAttributeByName(Element element, String attributeName) {
String attribute = element.getAttribute(attributeName);
if(StringUtils.isNotEmpty(attribute)) {
return attribute;
}
throw new IllegalArgumentException(String.format("Cannot find attribute name extension '%s'", attributeName));
}
private NodeList getElementsByTagName(Element element, String tagName) {
for (String prefix: dmnModelRepository.getSchemaPrefixes()) {
String qTagName = XMLConstants.DEFAULT_NS_PREFIX.equals(prefix) ? tagName : String.format("%s:%s", prefix, tagName);
NodeList nodeList = element.getElementsByTagName(qTagName);
if (nodeList.getLength() == 1) {
return nodeList;
}
}
throw new IllegalArgumentException(String.format("Cannot find Signavio extension '%s'", tagName));
}
}
