/*
* Copyright 2012 PRODYNA AG
*
* Licensed under the Eclipse Public License (EPL), Version 1.0 (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.opensource.org/licenses/eclipse-1.0.php or
* http://www.nabucco.org/License.html
*
* 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.nabucco.framework.generator.compiler.transformation.java.component;
import java.util.Collections;
import java.util.List;
import org.eclipse.jdt.internal.compiler.ast.ASTNode;
import org.eclipse.jdt.internal.compiler.ast.AllocationExpression;
import org.eclipse.jdt.internal.compiler.ast.Assignment;
import org.eclipse.jdt.internal.compiler.ast.Block;
import org.eclipse.jdt.internal.compiler.ast.ConstructorDeclaration;
import org.eclipse.jdt.internal.compiler.ast.EqualExpression;
import org.eclipse.jdt.internal.compiler.ast.ExplicitConstructorCall;
import org.eclipse.jdt.internal.compiler.ast.FieldDeclaration;
import org.eclipse.jdt.internal.compiler.ast.FieldReference;
import org.eclipse.jdt.internal.compiler.ast.IfStatement;
import org.eclipse.jdt.internal.compiler.ast.ImportReference;
import org.eclipse.jdt.internal.compiler.ast.MessageSend;
import org.eclipse.jdt.internal.compiler.ast.MethodDeclaration;
import org.eclipse.jdt.internal.compiler.ast.ParameterizedSingleTypeReference;
import org.eclipse.jdt.internal.compiler.ast.ReturnStatement;
import org.eclipse.jdt.internal.compiler.ast.Statement;
import org.eclipse.jdt.internal.compiler.ast.ThrowStatement;
import org.eclipse.jdt.internal.compiler.ast.TryStatement;
import org.eclipse.jdt.internal.compiler.ast.TypeDeclaration;
import org.eclipse.jdt.internal.compiler.ast.TypeReference;
import org.nabucco.framework.generator.compiler.constants.NabuccoJavaTemplateConstants;
import org.nabucco.framework.generator.compiler.transformation.java.common.ast.JavaAstSupport;
import org.nabucco.framework.generator.compiler.transformation.java.common.ast.container.JavaAstContainter;
import org.nabucco.framework.generator.compiler.transformation.java.common.ast.container.JavaAstType;
import org.nabucco.framework.generator.compiler.transformation.java.constants.ServerConstants;
import org.nabucco.framework.generator.compiler.transformation.java.visitor.NabuccoToJavaVisitorContext;
import org.nabucco.framework.generator.compiler.transformation.java.visitor.NabuccoToJavaVisitorSupport;
import org.nabucco.framework.generator.compiler.transformation.util.NabuccoTransformationUtility;
import org.nabucco.framework.generator.compiler.visitor.NabuccoVisitorException;
import org.nabucco.framework.generator.parser.model.NabuccoModelType;
import org.nabucco.framework.generator.parser.model.client.NabuccoClientType;
import org.nabucco.framework.generator.parser.model.modifier.NabuccoModifierType;
import org.nabucco.framework.generator.parser.syntaxtree.ComponentStatement;
import org.nabucco.framework.generator.parser.syntaxtree.ServiceDeclaration;
import org.nabucco.framework.mda.model.MdaModel;
import org.nabucco.framework.mda.model.java.JavaCompilationUnit;
import org.nabucco.framework.mda.model.java.JavaModel;
import org.nabucco.framework.mda.model.java.JavaModelException;
import org.nabucco.framework.mda.model.java.ast.element.JavaAstElementFactory;
import org.nabucco.framework.mda.model.java.ast.element.discriminator.LiteralType;
import org.nabucco.framework.mda.model.java.ast.element.method.JavaAstMethodSignature;
import org.nabucco.framework.mda.model.java.ast.produce.JavaAstModelProducer;
import org.nabucco.framework.mda.template.java.JavaTemplateException;
/**
* NabuccoToJavaComponentServiceDelegateFactoryWebVisitor
*
* @author Silas Schwarz PRODYNA AG
*/
class NabuccoToJavaComponentServiceDelegateFactoryWebVisitor extends NabuccoToJavaVisitorSupport
implements ServerConstants {
private static String PKG_COMMUNICATION = PKG_SEPARATOR + "communication";
private static String FACTORY_SUPPORT_IMPORT = "org.nabucco.framework.base.ui.web.communication.ServiceDelegateFactorySupport";
private static final JavaAstMethodSignature GET_DELEGATE_SIGNATURE = new JavaAstMethodSignature(
"getServiceDelegateTemplate", new String[] {});
public NabuccoToJavaComponentServiceDelegateFactoryWebVisitor(
NabuccoToJavaVisitorContext visitorContext) {
super(visitorContext);
}
@Override
public void visit(ComponentStatement nabuccoComponent, MdaModel<JavaModel> target) {
// Visit service-declarations first
super.visit(nabuccoComponent, target);
String projectName = super.getComponentName(NabuccoClientType.WEB);
JavaAstElementFactory javaFactory = JavaAstElementFactory.getInstance();
try {
// Load Template
JavaCompilationUnit unit = super
.extractAst(NabuccoJavaTemplateConstants.SERVICE_COMPONENT_DELEGATE_FACTORY_PROVIDER_TEMPLATE);
TypeDeclaration type = unit
.getType(NabuccoJavaTemplateConstants.SERVICE_COMPONENT_DELEGATE_FACTORY_PROVIDER_TEMPLATE);
// Annotations
JavaAstSupport.convertJavadocAnnotations(nabuccoComponent.annotationDeclaration, type);
// Set name
String name = nabuccoComponent.nodeToken2.tokenImage + SERVICE_DELEGATE_FACTORY;
javaFactory.getJavaAstType().setTypeName(type, name);
// handle instance field
handleInstanceField(type, name);
// handle getInstance()
handleGetInstance(type, name);
// add import for ServiceDelegateFactorySupport
ImportReference serviceDelegateFactorySupportImport = JavaAstModelProducer
.getInstance().createImportReference(FACTORY_SUPPORT_IMPORT);
javaFactory.getJavaAstUnit().addImport(unit.getUnitDeclaration(),
serviceDelegateFactorySupportImport);
// handle type parameter for ServiceDelegateFactorySupport
handleFactorySupportParameter(type, nabuccoComponent.nodeToken2.tokenImage);
// handle component field & add import for Locator
javaFactory.getJavaAstUnit().addImport(unit.getUnitDeclaration(),
handleConstrutor(type, nabuccoComponent));
// handle import of Component
javaFactory.getJavaAstUnit().addImport(unit.getUnitDeclaration(),
handleComponentImport(type, nabuccoComponent));
// handle service fields
JavaAstSupport.convertAstNodes(unit, super.getVisitorContext().getContainerList(),
super.getVisitorContext().getImportList());
// Set package
javaFactory.getJavaAstUnit().setPackage(unit.getUnitDeclaration(),
projectName + PKG_COMMUNICATION);
// set project
unit.setProjectName(projectName);
unit.setSourceFolder(super.getSourceFolder());
target.getModel().getUnitList().add(unit);
} catch (JavaModelException jme) {
throw new NabuccoVisitorException("Error during Java AST Component modification.", jme);
} catch (JavaTemplateException te) {
throw new NabuccoVisitorException("Error during Java template Component processing.",
te);
}
}
/**
* @param type
* @param tokenImage
*/
private void handleFactorySupportParameter(TypeDeclaration type, String tokenImage) {
JavaAstElementFactory javaFactory = JavaAstElementFactory.getInstance();
try {
TypeReference superClass = javaFactory.getJavaAstType().getSuperClass(type);
if (superClass instanceof ParameterizedSingleTypeReference) {
ParameterizedSingleTypeReference superType = (ParameterizedSingleTypeReference) superClass;
superType.typeArguments[0] = JavaAstModelProducer.getInstance()
.createTypeReference(tokenImage, false);
}
} catch (JavaModelException jme) {
throw new NabuccoVisitorException("Error during Java AST Component modification.", jme);
}
}
private ImportReference handleComponentImport(TypeDeclaration type,
ComponentStatement nabuccoComponent) throws JavaModelException {
String componentName = nabuccoComponent.nodeToken2.tokenImage;
String componentPackage = super.getProjectName(NabuccoModelType.COMPONENT,
NabuccoModifierType.PUBLIC);
return JavaAstModelProducer.getInstance().createImportReference(
componentPackage + PKG_SEPARATOR + componentName);
}
private ImportReference handleConstrutor(TypeDeclaration type,
ComponentStatement nabuccoComponent) throws JavaModelException {
JavaAstElementFactory javaFactory = JavaAstElementFactory.getInstance();
String locatorPackage = super.getProjectName(NabuccoModelType.COMPONENT,
NabuccoModifierType.PUBLIC);
String typeName = javaFactory.getJavaAstType().getTypeName(type);
ConstructorDeclaration constructor = javaFactory.getJavaAstType().getConstructor(type,
new JavaAstMethodSignature(typeName, new String[] {}));
TypeReference locatorTypeReference = JavaAstModelProducer.getInstance()
.createTypeReference(nabuccoComponent.nodeToken2.tokenImage + LOCATOR, false);
MessageSend locatorGetInstanceCall = JavaAstModelProducer.getInstance().createMessageSend(
SINGLETON_GETTER, locatorTypeReference,
Collections.<org.eclipse.jdt.internal.compiler.ast.Expression> emptyList());
ExplicitConstructorCall constructorCall = constructor.constructorCall;
constructorCall.arguments[0] = locatorGetInstanceCall;
return JavaAstModelProducer.getInstance().createImportReference(
locatorPackage + PKG_SEPARATOR + nabuccoComponent.nodeToken2.tokenImage + LOCATOR);
}
private void handleGetInstance(TypeDeclaration type, String name) throws JavaModelException {
JavaAstElementFactory javaFactory = JavaAstElementFactory.getInstance();
MethodDeclaration method = (MethodDeclaration) javaFactory.getJavaAstType().getMethod(type,
new JavaAstMethodSignature(SINGLETON_GETTER, new String[] {}));
TypeReference selfType = JavaAstModelProducer.getInstance()
.createTypeReference(name, false);
javaFactory.getJavaAstMethod().setReturnType(method, selfType);
}
@Override
public void visit(ServiceDeclaration nabuccoService, MdaModel<JavaModel> target) {
String type = nabuccoService.nodeToken1.tokenImage;
String delegateType = type + DELEGATE;
String delegateName = NabuccoTransformationUtility.firstToLower(delegateType);
JavaAstContainter<FieldDeclaration> field = JavaAstSupport.createField(delegateType,
delegateName, NabuccoModifierType.PRIVATE);
JavaAstContainter<MethodDeclaration> getter = new JavaAstContainter<MethodDeclaration>(
handleGetterMethod(field.getAstNode()), JavaAstType.METHOD);
String importString = super.resolveImport(type).replace(".facade.service.",
".ui.web" + PKG_COMMUNICATION + PKG_SEPARATOR);
getter.getImports().add(importString + DELEGATE);
List<JavaAstContainter<? extends ASTNode>> containerList = super.getVisitorContext()
.getContainerList();
containerList.add(field);
containerList.add(getter);
}
private MethodDeclaration handleGetterMethod(FieldDeclaration fieldDeclaration) {
MethodDeclaration result = null;
try {
// Load Template
JavaCompilationUnit unit = super
.extractAst(NabuccoJavaTemplateConstants.COMPONENT_OPERATION_TEMPLATE);
TypeDeclaration type = unit
.getType(NabuccoJavaTemplateConstants.COMPONENT_OPERATION_TEMPLATE);
JavaAstElementFactory javaFactory = JavaAstElementFactory.getInstance();
MethodDeclaration method = (MethodDeclaration) javaFactory.getJavaAstType().getMethod(
type, GET_DELEGATE_SIGNATURE);
javaFactory.getJavaAstMethod().setReturnType(method,
javaFactory.getJavaAstField().getFieldType(fieldDeclaration));
String fieldName = javaFactory.getJavaAstField().getFieldName(fieldDeclaration);
TypeReference fieldType = javaFactory.getJavaAstField().getFieldType(fieldDeclaration);
String serviceName = NabuccoTransformationUtility.firstToUpper(fieldName).replace(
DELEGATE, "");
String buildMethodName = PREFIX_GETTER + serviceName;
Statement[] statementsInTryBlock = (((TryStatement) method.statements[0]).tryBlock).statements;
((AllocationExpression) (((ThrowStatement) (((TryStatement) method.statements[0]).catchBlocks[0]).statements[0]).exception)).arguments[0] = JavaAstModelProducer
.getInstance().createLiteral("Cannot locate service: " + serviceName,
LiteralType.STRING_LITERAL);
EqualExpression ifBlockConditionStatement = (EqualExpression) ((IfStatement) statementsInTryBlock[0]).condition;
((FieldReference) ifBlockConditionStatement.left).token = fieldName.toCharArray();
Statement[] ifBlockStatements = ((Block) ((IfStatement) statementsInTryBlock[0]).thenStatement).statements;
((FieldReference) ((Assignment) ifBlockStatements[0]).lhs).token = fieldName
.toCharArray();
((AllocationExpression) ((Assignment) ifBlockStatements[0]).expression).type = fieldType;
((MessageSend) ((AllocationExpression) ((Assignment) ifBlockStatements[0]).expression).arguments[0]).selector = buildMethodName
.toCharArray();
ReturnStatement returnStatement = (ReturnStatement) statementsInTryBlock[1];
((FieldReference) returnStatement.expression).token = fieldName.toCharArray();
javaFactory.getJavaAstMethod().setMethodName(method, buildMethodName);
result = method;
} catch (JavaModelException jme) {
throw new NabuccoVisitorException(
"Error during Java AST private getter method generation modification.", jme);
} catch (JavaTemplateException te) {
throw new NabuccoVisitorException(
"Error during Java template private getter method generation processing.", te);
}
return result;
}
private void handleInstanceField(TypeDeclaration type, String name) throws JavaModelException {
JavaAstElementFactory javaFactory = JavaAstElementFactory.getInstance();
FieldDeclaration instanceField = javaFactory.getJavaAstType().getField(type, "instance");
// reference to own type
TypeReference selfType = JavaAstModelProducer.getInstance()
.createTypeReference(name, false);
// set field type
javaFactory.getJavaAstField().setFieldType(instanceField, selfType);
// create new assignment
javaFactory.getJavaAstField().setFieldInitializer(instanceField,
JavaAstModelProducer.getInstance().createAllocationExpression(selfType, null));
}
}