/* 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.camunda.bpm.engine.impl.cmmn.handler;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import org.camunda.bpm.engine.delegate.CaseExecutionListener;
import org.camunda.bpm.engine.delegate.Expression;
import org.camunda.bpm.engine.impl.bpmn.parser.FieldDeclaration;
import org.camunda.bpm.engine.impl.cmmn.CaseControlRule;
import org.camunda.bpm.engine.impl.cmmn.behavior.CaseControlRuleImpl;
import org.camunda.bpm.engine.impl.cmmn.behavior.CmmnActivityBehavior;
import org.camunda.bpm.engine.impl.cmmn.listener.ClassDelegateCaseExecutionListener;
import org.camunda.bpm.engine.impl.cmmn.listener.DelegateExpressionCaseExecutionListener;
import org.camunda.bpm.engine.impl.cmmn.listener.ExpressionCaseExecutionListener;
import org.camunda.bpm.engine.impl.cmmn.listener.ScriptCaseExecutionListener;
import org.camunda.bpm.engine.impl.cmmn.model.CmmnActivity;
import org.camunda.bpm.engine.impl.cmmn.model.CmmnCaseDefinition;
import org.camunda.bpm.engine.impl.cmmn.model.CmmnSentryDeclaration;
import org.camunda.bpm.engine.impl.context.Context;
import org.camunda.bpm.engine.impl.el.ExpressionManager;
import org.camunda.bpm.engine.impl.el.FixedValue;
import org.camunda.bpm.engine.impl.persistence.entity.DeploymentEntity;
import org.camunda.bpm.engine.impl.scripting.DynamicResourceExecutableScript;
import org.camunda.bpm.engine.impl.scripting.DynamicSourceExecutableScript;
import org.camunda.bpm.engine.impl.scripting.ExecutableScript;
import org.camunda.bpm.engine.impl.scripting.engine.JuelScriptEngineFactory;
import org.camunda.bpm.engine.impl.util.ResourceUtil;
import org.camunda.bpm.engine.impl.util.StringUtil;
import org.camunda.bpm.model.cmmn.Query;
import org.camunda.bpm.model.cmmn.instance.CmmnElement;
import org.camunda.bpm.model.cmmn.instance.DiscretionaryItem;
import org.camunda.bpm.model.cmmn.instance.ExtensionElements;
import org.camunda.bpm.model.cmmn.instance.ManualActivationRule;
import org.camunda.bpm.model.cmmn.instance.PlanItem;
import org.camunda.bpm.model.cmmn.instance.PlanItemControl;
import org.camunda.bpm.model.cmmn.instance.PlanItemDefinition;
import org.camunda.bpm.model.cmmn.instance.RepetitionRule;
import org.camunda.bpm.model.cmmn.instance.RequiredRule;
import org.camunda.bpm.model.cmmn.instance.Sentry;
import org.camunda.bpm.model.cmmn.instance.camunda.CamundaCaseExecutionListener;
import org.camunda.bpm.model.cmmn.instance.camunda.CamundaExpression;
import org.camunda.bpm.model.cmmn.instance.camunda.CamundaField;
import org.camunda.bpm.model.cmmn.instance.camunda.CamundaScript;
import org.camunda.bpm.model.cmmn.instance.camunda.CamundaString;
import org.camunda.bpm.model.xml.instance.ModelElementInstance;
/**
* @author Roman Smirnov
*
*/
public abstract class ItemHandler extends CmmnElementHandler<CmmnElement, CmmnActivity> {
public static final String PROPERTY_REQUIRED_RULE = "requiredRule";
public static final String PROPERTY_MANUAL_ACTIVATION_RULE = "manualActivationRule";
public static final String PROPERTY_REPETITION_RULE = "repetitionRule";
public static final String PROPERTY_IS_BLOCKING = "isBlocking";
public static final String PROPERTY_DISCRETIONARY = "discretionary";
public static List<String> TASK_OR_STAGE_EVENTS = Arrays.asList(
CaseExecutionListener.CREATE,
CaseExecutionListener.ENABLE,
CaseExecutionListener.DISABLE,
CaseExecutionListener.RE_ENABLE,
CaseExecutionListener.START,
CaseExecutionListener.MANUAL_START,
CaseExecutionListener.TERMINATE,
CaseExecutionListener.EXIT,
CaseExecutionListener.SUSPEND,
CaseExecutionListener.PARENT_SUSPEND,
CaseExecutionListener.RESUME,
CaseExecutionListener.PARENT_RESUME,
CaseExecutionListener.COMPLETE
);
public static List<String> EVENTLISTENER_OR_MILESTONE_EVENTS = Arrays.asList(
CaseExecutionListener.CREATE,
CaseExecutionListener.SUSPEND,
CaseExecutionListener.RESUME,
CaseExecutionListener.TERMINATE,
CaseExecutionListener.PARENT_TERMINATE,
CaseExecutionListener.OCCUR
);
public static List<String> CASE_PLAN_MODEL_EVENTS = Arrays.asList(
CaseExecutionListener.CREATE,
CaseExecutionListener.TERMINATE,
CaseExecutionListener.SUSPEND,
CaseExecutionListener.COMPLETE,
CaseExecutionListener.RE_ACTIVATE,
CaseExecutionListener.CLOSE
);
protected CmmnActivity createActivity(CmmnElement element, CmmnHandlerContext context) {
String id = element.getId();
CmmnActivity parent = context.getParent();
CmmnActivity newActivity = null;
if (parent != null) {
newActivity = parent.createActivity(id);
} else {
CmmnCaseDefinition caseDefinition = context.getCaseDefinition();
newActivity = new CmmnActivity(id, caseDefinition);
}
newActivity.setCmmnElement(element);
CmmnActivityBehavior behavior = getActivityBehavior();
newActivity.setActivityBehavior(behavior);
return newActivity;
}
protected CmmnActivityBehavior getActivityBehavior() {
return null;
}
public CmmnActivity handleElement(CmmnElement element, CmmnHandlerContext context) {
// create a new activity
CmmnActivity newActivity = createActivity(element, context);
// initialize activity
initializeActivity(element, newActivity, context);
return newActivity;
}
protected void initializeActivity(CmmnElement element, CmmnActivity activity, CmmnHandlerContext context) {
if (isDiscretionaryItem(element)) {
activity.setProperty(PROPERTY_DISCRETIONARY, true);
}
String name = getName(element);
if (name == null) {
PlanItemDefinition definition = getDefinition(element);
name = definition.getName();
}
activity.setName(name);
// requiredRule
initializeRequiredRule(element, activity, context);
// manualActivation
initializeManualActivationRule(element, activity, context);
// repetitionRule
initializeRepetitionRule(element, activity, context);
// case execution listeners
initializeCaseExecutionListeners(element, activity, context);
// initialize entry criteria
initializeEntryCriterias(element, activity, context);
// initialize exit criteria
initializeExitCriterias(element, activity, context);
}
protected void initializeRequiredRule(CmmnElement element, CmmnActivity activity, CmmnHandlerContext context) {
PlanItemControl itemControl = getItemControl(element);
PlanItemControl defaultControl = getDefaultControl(element);
ExpressionManager expressionManager = context.getExpressionManager();
RequiredRule requiredRule = null;
if (itemControl != null) {
requiredRule = itemControl.getRequiredRule();
}
if (requiredRule == null && defaultControl != null) {
requiredRule = defaultControl.getRequiredRule();
}
if (requiredRule != null) {
String rule = requiredRule.getCondition().getBody();
Expression requiredRuleExpression = expressionManager.createExpression(rule);
CaseControlRule caseRule = new CaseControlRuleImpl(requiredRuleExpression);
activity.setProperty(PROPERTY_REQUIRED_RULE, caseRule);
}
}
protected void initializeManualActivationRule(CmmnElement element, CmmnActivity activity, CmmnHandlerContext context) {
PlanItemControl itemControl = getItemControl(element);
PlanItemControl defaultControl = getDefaultControl(element);
ExpressionManager expressionManager = context.getExpressionManager();
ManualActivationRule manualActivationRule = null;
if (itemControl != null) {
manualActivationRule = itemControl.getManualActivationRule();
}
if (manualActivationRule == null && defaultControl != null) {
manualActivationRule = defaultControl.getManualActivationRule();
}
if (manualActivationRule != null) {
String rule = manualActivationRule.getCondition().getBody();
Expression manualActivationExpression = expressionManager.createExpression(rule);
CaseControlRule caseRule = new CaseControlRuleImpl(manualActivationExpression);
activity.setProperty(PROPERTY_MANUAL_ACTIVATION_RULE, caseRule);
}
}
protected void initializeRepetitionRule(CmmnElement element, CmmnActivity activity, CmmnHandlerContext context) {
PlanItemControl itemControl = getItemControl(element);
PlanItemControl defaultControl = getDefaultControl(element);
ExpressionManager expressionManager = context.getExpressionManager();
RepetitionRule repetitionRule = null;
if (itemControl != null) {
repetitionRule = itemControl.getRepetitionRule();
}
if (repetitionRule == null && defaultControl != null) {
repetitionRule = defaultControl.getRepetitionRule();
}
if (repetitionRule != null) {
String rule = repetitionRule.getCondition().getBody();
Expression repetitionRuleExpression = expressionManager.createExpression(rule);
CaseControlRule caseRule = new CaseControlRuleImpl(repetitionRuleExpression);
activity.setProperty(PROPERTY_REPETITION_RULE, caseRule);
}
}
protected void initializeCaseExecutionListeners(CmmnElement element, CmmnActivity activity, CmmnHandlerContext context) {
PlanItemDefinition definition = getDefinition(element);
List<CamundaCaseExecutionListener> listeners = queryExtensionElementsByClass(definition, CamundaCaseExecutionListener.class);
for (CamundaCaseExecutionListener listener : listeners) {
CaseExecutionListener caseExecutionListener = initializeCaseExecutionListener(element, activity, context, listener);
String eventName = listener.getCamundaEvent();
if(eventName != null) {
activity.addListener(eventName, caseExecutionListener);
} else {
for (String event : getStandardEvents(element)) {
activity.addListener(event, caseExecutionListener);
}
}
}
}
protected CaseExecutionListener initializeCaseExecutionListener(CmmnElement element, CmmnActivity activity, CmmnHandlerContext context, CamundaCaseExecutionListener listener) {
Collection<CamundaField> fields = listener.getCamundaFields();
List<FieldDeclaration> fieldDeclarations = initializeFieldDeclarations(element, activity, context, fields);
ExpressionManager expressionManager = context.getExpressionManager();
CaseExecutionListener caseExecutionListener = null;
String className = listener.getCamundaClass();
String expression = listener.getCamundaExpression();
String delegateExpression = listener.getCamundaDelegateExpression();
CamundaScript scriptElement = listener.getCamundaScript();
if (className != null) {
caseExecutionListener = new ClassDelegateCaseExecutionListener(className, fieldDeclarations);
} else if (expression != null) {
Expression expressionExp = expressionManager.createExpression(expression);
caseExecutionListener = new ExpressionCaseExecutionListener(expressionExp);
} else if (delegateExpression != null) {
Expression delegateExp = expressionManager.createExpression(delegateExpression);
caseExecutionListener = new DelegateExpressionCaseExecutionListener(delegateExp, fieldDeclarations);
} else if (scriptElement != null) {
ExecutableScript executableScript = initializeScript(element, activity, context, scriptElement);
if (executableScript != null) {
caseExecutionListener = new ScriptCaseExecutionListener(executableScript);
}
}
return caseExecutionListener;
}
protected ExecutableScript initializeScript(CmmnElement element, CmmnActivity activity, CmmnHandlerContext context, CamundaScript script) {
String language = script.getCamundaScriptFormat();
String resource = script.getCamundaResource();
String source = script.getTextContent();
return initializeScriptDefinition(language, resource, source, context);
}
public ExecutableScript initializeScriptDefinition(String language, String resource, String source, CmmnHandlerContext context) {
if (language != null) {
if (resource != null && !resource.isEmpty()) {
return parseScriptResource(resource, language, context);
}
else if(source != null) {
return parseScriptSource(source, language, context);
}
}
return null;
}
protected ExecutableScript parseScriptSource(String source, String language, CmmnHandlerContext context) {
if (StringUtil.isExpression(source) && !JuelScriptEngineFactory.names.contains(language)) {
ExpressionManager expressionManager = context.getExpressionManager();
Expression scriptExpression = expressionManager.createExpression(source.trim());
return new DynamicSourceExecutableScript(scriptExpression, language);
}
else {
return parseScript(source, language);
}
}
protected ExecutableScript parseScriptResource(String resource, String language, CmmnHandlerContext context) {
if (StringUtil.isExpression(resource)) {
ExpressionManager expressionManager = context.getExpressionManager();
Expression scriptResourceExpression = expressionManager.createExpression(resource);
return new DynamicResourceExecutableScript(scriptResourceExpression, language);
}
else {
DeploymentEntity deployment = (DeploymentEntity) context.getDeployment();
String scriptSource = ResourceUtil.loadResourceContent(resource, deployment);
return parseScript(scriptSource, language);
}
}
protected ExecutableScript parseScript(String script, String language) {
return Context.getProcessEngineConfiguration()
.getScriptFactory()
.createScript(script, language);
}
protected List<FieldDeclaration> initializeFieldDeclarations(CmmnElement element, CmmnActivity activity, CmmnHandlerContext context, Collection<CamundaField> fields) {
List<FieldDeclaration> fieldDeclarations = new ArrayList<FieldDeclaration>();
for (CamundaField field : fields) {
FieldDeclaration fieldDeclaration = initializeFieldDeclaration(element, activity, context, field);
fieldDeclarations.add(fieldDeclaration);
}
return fieldDeclarations;
}
protected FieldDeclaration initializeFieldDeclaration(CmmnElement element, CmmnActivity activity, CmmnHandlerContext context, CamundaField field) {
String name = field.getCamundaName();
String type = Expression.class.getName();
Object value = getFixedValue(field);
if (value == null) {
ExpressionManager expressionManager = context.getExpressionManager();
value = getExpressionValue(field, expressionManager);
}
return new FieldDeclaration(name, type, value);
}
protected FixedValue getFixedValue(CamundaField field) {
CamundaString strg = field.getCamundaString();
String value = null;
if (strg != null) {
value = strg.getTextContent();
}
if (value == null) {
value = field.getCamundaStringValue();
}
if (value != null) {
return new FixedValue(value);
}
return null;
}
protected Expression getExpressionValue(CamundaField field, ExpressionManager expressionManager) {
CamundaExpression expression = field.getCamundaExpressionChild();
String value = null;
if (expression != null) {
value = expression.getTextContent();
}
if (value == null) {
value = field.getCamundaExpression();
}
if (value != null) {
return expressionManager.createExpression(value);
}
return null;
}
protected void initializeEntryCriterias(CmmnElement element, CmmnActivity activity, CmmnHandlerContext context) {
Collection<Sentry> entryCriterias = getEntryCriterias(element);
if (!entryCriterias.isEmpty()) {
CmmnActivity parent = activity.getParent();
if (parent != null) {
for (Sentry sentry : entryCriterias) {
String sentryId = sentry.getId();
CmmnSentryDeclaration sentryDeclaration = parent.getSentry(sentryId);
activity.addEntryCriteria(sentryDeclaration);
}
}
}
}
protected void initializeExitCriterias(CmmnElement element, CmmnActivity activity, CmmnHandlerContext context) {
Collection<Sentry> exitCriterias = getExitCriterias(element);
if (!exitCriterias.isEmpty()) {
CmmnActivity parent = activity.getParent();
if (parent != null) {
for (Sentry sentry : exitCriterias) {
String sentryId = sentry.getId();
CmmnSentryDeclaration sentryDeclaration = parent.getSentry(sentryId);
activity.addExitCriteria(sentryDeclaration);
}
}
}
}
protected PlanItemControl getDefaultControl(CmmnElement element) {
PlanItemDefinition definition = getDefinition(element);
return definition.getDefaultControl();
}
protected <V extends ModelElementInstance> List<V> queryExtensionElementsByClass(CmmnElement element, Class<V> cls) {
ExtensionElements extensionElements = getExtensionElements(element);
if (extensionElements != null) {
Query<ModelElementInstance> query = extensionElements.getElementsQuery();
return query.filterByType(cls).list();
} else {
return new ArrayList<V>();
}
}
protected ExtensionElements getExtensionElements(CmmnElement element) {
return element.getExtensionElements();
}
protected PlanItemControl getItemControl(CmmnElement element) {
if (isPlanItem(element)) {
PlanItem planItem = (PlanItem) element;
return planItem.getItemControl();
} else
if (isDiscretionaryItem(element)) {
DiscretionaryItem discretionaryItem = (DiscretionaryItem) element;
return discretionaryItem.getItemControl();
}
return null;
}
protected String getName(CmmnElement element) {
String name = null;
if (isPlanItem(element)) {
PlanItem planItem = (PlanItem) element;
name = planItem.getName();
}
if (name == null || name.isEmpty()) {
PlanItemDefinition definition = getDefinition(element);
if (definition != null) {
name = definition.getName();
}
}
return name;
}
protected PlanItemDefinition getDefinition(CmmnElement element) {
if (isPlanItem(element)) {
PlanItem planItem = (PlanItem) element;
return planItem.getDefinition();
} else
if (isDiscretionaryItem(element)) {
DiscretionaryItem discretionaryItem = (DiscretionaryItem) element;
return discretionaryItem.getDefinition();
}
return null;
}
protected Collection<Sentry> getEntryCriterias(CmmnElement element) {
if (isPlanItem(element)) {
PlanItem planItem = (PlanItem) element;
return planItem.getEntryCriterias();
}
return new ArrayList<Sentry>();
}
protected Collection<Sentry> getExitCriterias(CmmnElement element) {
if (isPlanItem(element)) {
PlanItem planItem = (PlanItem) element;
return planItem.getExitCriterias();
}
return new ArrayList<Sentry>();
}
protected String getDesciption(CmmnElement element) {
String description = element.getDescription();
if (description == null) {
PlanItemDefinition definition = getDefinition(element);
description = definition.getDescription();
}
return description;
}
protected boolean isPlanItem(CmmnElement element) {
return element instanceof PlanItem;
}
protected boolean isDiscretionaryItem(CmmnElement element) {
return element instanceof DiscretionaryItem;
}
protected abstract List<String> getStandardEvents(CmmnElement element);
}