/*
* Copyright 2013 Red Hat Inc. and/or its affiliates and other contributors.
*
* 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.switchyard.component.rules.config.model;
import java.io.IOException;
import java.lang.reflect.Method;
import java.net.URL;
import java.util.List;
import org.switchyard.common.lang.Strings;
import org.switchyard.common.type.classpath.ClasspathScanner;
import org.switchyard.common.type.classpath.IsAnnotationPresentFilter;
import org.switchyard.component.common.knowledge.annotation.Fault;
import org.switchyard.component.common.knowledge.annotation.Global;
import org.switchyard.component.common.knowledge.annotation.Input;
import org.switchyard.component.common.knowledge.annotation.Output;
import org.switchyard.component.common.knowledge.config.model.KnowledgeSwitchYardScanner;
import org.switchyard.component.common.knowledge.config.model.OperationModel;
import org.switchyard.component.common.knowledge.config.model.OperationsModel;
import org.switchyard.component.common.knowledge.config.model.v1.V1OperationsModel;
import org.switchyard.component.rules.RulesMessages;
import org.switchyard.component.rules.RulesOperationType;
import org.switchyard.component.rules.annotation.Execute;
import org.switchyard.component.rules.annotation.FireAllRules;
import org.switchyard.component.rules.annotation.FireUntilHalt;
import org.switchyard.component.rules.annotation.Insert;
import org.switchyard.component.rules.annotation.Rules;
import org.switchyard.component.rules.config.model.v1.V1RulesComponentImplementationModel;
import org.switchyard.component.rules.config.model.v1.V1RulesOperationModel;
import org.switchyard.config.model.ScannerInput;
import org.switchyard.config.model.ScannerOutput;
import org.switchyard.config.model.composite.ComponentModel;
import org.switchyard.config.model.composite.ComponentServiceModel;
import org.switchyard.config.model.composite.CompositeModel;
import org.switchyard.config.model.composite.InterfaceModel;
import org.switchyard.config.model.composite.v1.V1ComponentModel;
import org.switchyard.config.model.composite.v1.V1ComponentServiceModel;
import org.switchyard.config.model.composite.v1.V1CompositeModel;
import org.switchyard.config.model.composite.v1.V1InterfaceModel;
import org.switchyard.config.model.switchyard.SwitchYardModel;
import org.switchyard.config.model.switchyard.SwitchYardNamespace;
import org.switchyard.config.model.switchyard.v1.V1SwitchYardModel;
import org.switchyard.extensions.java.JavaService;
import org.switchyard.metadata.ServiceOperation;
/**
* RulesSwitchYardScanner.
*
* @author David Ward <<a href="mailto:dward@jboss.org">dward@jboss.org</a>> © 2012 Red Hat Inc.
*/
public class RulesSwitchYardScanner extends KnowledgeSwitchYardScanner {
private static final IsAnnotationPresentFilter EXECUTE_FILTER = new IsAnnotationPresentFilter(Execute.class);
private static final IsAnnotationPresentFilter INSERT_FILTER = new IsAnnotationPresentFilter(Insert.class);
private static final IsAnnotationPresentFilter FIRE_ALL_RULES_FILTER = new IsAnnotationPresentFilter(FireAllRules.class);
private static final IsAnnotationPresentFilter FIRE_UNTIL_HALT_FILTER = new IsAnnotationPresentFilter(FireUntilHalt.class);
private final IsAnnotationPresentFilter _rulesFilter = new IsAnnotationPresentFilter(Rules.class);
/**
* {@inheritDoc}
*/
@Override
public ScannerOutput<SwitchYardModel> scan(ScannerInput<SwitchYardModel> input) throws IOException {
SwitchYardNamespace switchyardNamespace = input.getSwitchyardNamespace();
SwitchYardModel switchyardModel = new V1SwitchYardModel(switchyardNamespace.uri());
CompositeModel compositeModel = new V1CompositeModel();
compositeModel.setName(input.getCompositeName());
ClasspathScanner rulesScanner = new ClasspathScanner(_rulesFilter);
for (URL url : input.getURLs()) {
rulesScanner.scan(url);
}
List<Class<?>> rulesClasses = _rulesFilter.getMatchedTypes();
for (Class<?> rulesClass : rulesClasses) {
compositeModel.addComponent(scan(rulesClass, switchyardNamespace));
}
if (!compositeModel.getModelChildren().isEmpty()) {
switchyardModel.setComposite(compositeModel);
}
return new ScannerOutput<SwitchYardModel>().setModel(switchyardModel);
}
/**
* Scans a class using the default switchyard namespace.
* @param rulesClass the class
* @return the component model
* @throws IOException oops
*/
public ComponentModel scan(Class<?> rulesClass) throws IOException {
return scan(rulesClass, null);
}
/**
* Scans a class using the specified switchyard namespace.
* @param rulesClass the class
* @param switchyardNamespace the switchyard namespace
* @return the component model
* @throws IOException oops
*/
public ComponentModel scan(Class<?> rulesClass, SwitchYardNamespace switchyardNamespace) throws IOException {
if (switchyardNamespace == null) {
switchyardNamespace = SwitchYardNamespace.DEFAULT;
}
Rules rules = rulesClass.getAnnotation(Rules.class);
Class<?> rulesInterface = rules.value();
if (Rules.UndefinedRulesInterface.class.equals(rulesInterface)) {
rulesInterface = rulesClass;
}
if (!rulesInterface.isInterface()) {
throw RulesMessages.MESSAGES.rulesInterfaceGetNameIsAClassRulesOnlyAllowedOnInterfaces(rulesInterface.getName());
}
String rulesName = Strings.trimToNull(rules.name());
if (rulesName == null) {
rulesName = rulesInterface.getSimpleName();
}
ComponentModel componentModel = new V1ComponentModel();
componentModel.setName(rulesName);
RulesNamespace rulesNamespace = RulesNamespace.fromUri(rules.namespace());
if (rulesNamespace == null) {
rulesNamespace = RulesNamespace.DEFAULT;
for (RulesNamespace value : RulesNamespace.values()) {
if (value.versionMatches(switchyardNamespace)) {
rulesNamespace = value;
break;
}
}
}
RulesComponentImplementationModel componentImplementationModel = new V1RulesComponentImplementationModel(rulesNamespace.uri());
OperationsModel operationsModel = new V1OperationsModel(rulesNamespace.uri());
JavaService javaService = JavaService.fromClass(rulesInterface);
for (Method method : rulesClass.getDeclaredMethods()) {
RulesOperationType operationType = null;
String eventId = null;
Global[] globalMappingAnnotations = null;
Input[] inputMappingAnnotations = null;
Output[] outputMappingAnnotations = null;
Fault[] faultMappingAnnotations = null;
if (EXECUTE_FILTER.matches(method)) {
operationType = RulesOperationType.EXECUTE;
Execute executeAnnotation = method.getAnnotation(Execute.class);
globalMappingAnnotations = executeAnnotation.globals();
inputMappingAnnotations = executeAnnotation.inputs();
outputMappingAnnotations = executeAnnotation.outputs();
faultMappingAnnotations = executeAnnotation.faults();
} else if (INSERT_FILTER.matches(method)) {
operationType = RulesOperationType.INSERT;
Insert insertAnnotation = method.getAnnotation(Insert.class);
globalMappingAnnotations = insertAnnotation.globals();
inputMappingAnnotations = insertAnnotation.inputs();
outputMappingAnnotations = insertAnnotation.outputs();
faultMappingAnnotations = insertAnnotation.faults();
} else if (FIRE_ALL_RULES_FILTER.matches(method)) {
operationType = RulesOperationType.FIRE_ALL_RULES;
FireAllRules fireAllRulesAnnotation = method.getAnnotation(FireAllRules.class);
globalMappingAnnotations = fireAllRulesAnnotation.globals();
inputMappingAnnotations = fireAllRulesAnnotation.inputs();
outputMappingAnnotations = fireAllRulesAnnotation.outputs();
faultMappingAnnotations = fireAllRulesAnnotation.faults();
} else if (FIRE_UNTIL_HALT_FILTER.matches(method)) {
operationType = RulesOperationType.FIRE_UNTIL_HALT;
FireUntilHalt fireUntilHaltAnnotation = method.getAnnotation(FireUntilHalt.class);
eventId = Strings.trimToNull(fireUntilHaltAnnotation.eventId());
globalMappingAnnotations = fireUntilHaltAnnotation.globals();
inputMappingAnnotations = fireUntilHaltAnnotation.inputs();
outputMappingAnnotations = fireUntilHaltAnnotation.outputs();
faultMappingAnnotations = fireUntilHaltAnnotation.faults();
}
if (operationType != null) {
ServiceOperation serviceOperation = javaService.getOperation(method.getName());
if (serviceOperation != null) {
OperationModel operationModel = new V1RulesOperationModel(rulesNamespace.uri());
operationModel.setEventId(eventId);
operationModel.setName(serviceOperation.getName());
operationModel.setType(operationType);
operationModel.setGlobals(toGlobalsModel(globalMappingAnnotations, rulesNamespace));
operationModel.setInputs(toInputsModel(inputMappingAnnotations, rulesNamespace));
operationModel.setOutputs(toOutputsModel(outputMappingAnnotations, rulesNamespace));
operationModel.setFaults(toFaultsModel(faultMappingAnnotations, rulesNamespace));
operationsModel.addOperation(operationModel);
}
}
}
if (!operationsModel.getOperations().isEmpty()) {
componentImplementationModel.setOperations(operationsModel);
}
componentImplementationModel.setChannels(toChannelsModel(rules.channels(), rulesNamespace, componentModel, switchyardNamespace));
componentImplementationModel.setListeners(toListenersModel(rules.listeners(), rulesNamespace));
componentImplementationModel.setLoggers(toLoggersModel(rules.loggers(), rulesNamespace));
componentImplementationModel.setManifest(toManifestModel(rules.manifest(), rulesNamespace));
componentImplementationModel.setProperties(toPropertiesModel(rules.properties(), rulesNamespace));
componentModel.setImplementation(componentImplementationModel);
ComponentServiceModel componentServiceModel = new V1ComponentServiceModel(switchyardNamespace.uri());
InterfaceModel interfaceModel = new V1InterfaceModel(InterfaceModel.JAVA);
interfaceModel.setInterface(rulesInterface.getName());
componentServiceModel.setInterface(interfaceModel);
componentServiceModel.setName(rulesName);
componentModel.addService(componentServiceModel);
return componentModel;
}
}