/*
* 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.adapter;
import java.util.List;
import org.eclipse.jdt.internal.compiler.ast.AllocationExpression;
import org.eclipse.jdt.internal.compiler.ast.Argument;
import org.eclipse.jdt.internal.compiler.ast.Assignment;
import org.eclipse.jdt.internal.compiler.ast.Block;
import org.eclipse.jdt.internal.compiler.ast.CastExpression;
import org.eclipse.jdt.internal.compiler.ast.ClassLiteralAccess;
import org.eclipse.jdt.internal.compiler.ast.ConstructorDeclaration;
import org.eclipse.jdt.internal.compiler.ast.FieldDeclaration;
import org.eclipse.jdt.internal.compiler.ast.IfStatement;
import org.eclipse.jdt.internal.compiler.ast.InstanceOfExpression;
import org.eclipse.jdt.internal.compiler.ast.LocalDeclaration;
import org.eclipse.jdt.internal.compiler.ast.MethodDeclaration;
import org.eclipse.jdt.internal.compiler.ast.ParameterizedSingleTypeReference;
import org.eclipse.jdt.internal.compiler.ast.QualifiedNameReference;
import org.eclipse.jdt.internal.compiler.ast.ReturnStatement;
import org.eclipse.jdt.internal.compiler.ast.SingleTypeReference;
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.javadoc.NabuccoToJavaJavadocCreator;
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.mapper.NabuccoModifierComponentMapper;
import org.nabucco.framework.generator.compiler.visitor.NabuccoVisitorException;
import org.nabucco.framework.generator.parser.model.NabuccoModelType;
import org.nabucco.framework.generator.parser.syntaxtree.AdapterStatement;
import org.nabucco.framework.mda.logger.MdaLogger;
import org.nabucco.framework.mda.logger.MdaLoggingFactory;
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.JavaAstMethod;
import org.nabucco.framework.mda.model.java.ast.element.JavaAstElementFactory;
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;
/**
* NabuccoToJavaAdapterInterfaceVisitor
*
* @author Nicolas Moser, PRODYNA AG
*/
class NabuccoToJavaAdapterLocatorVisitor extends NabuccoToJavaVisitorSupport implements ServerConstants {
private static MdaLogger logger = MdaLoggingFactory.getInstance().getLogger(
NabuccoToJavaAdapterLocatorVisitor.class);
private static final String[] CONSTRUCTOR_ARGUMENTS = { "String", "Class" };
private static final JavaAstMethodSignature GET_INSTANCE = new JavaAstMethodSignature(SINGLETON_GETTER);
/**
* Creates a new {@link NabuccoToJavaAdapterLocatorVisitor} instance.
*
* @param visitorContext
* the visitor context
*/
public NabuccoToJavaAdapterLocatorVisitor(NabuccoToJavaVisitorContext visitorContext) {
super(visitorContext);
}
@Override
public void visit(AdapterStatement nabuccoAdapter, MdaModel<JavaModel> target) {
// Visit sub-nodes first!
super.visit(nabuccoAdapter, target);
JavaAstElementFactory javaFactory = JavaAstElementFactory.getInstance();
String interfaceName = nabuccoAdapter.nodeToken2.tokenImage;
String pkg = this.getVisitorContext().getPackage();
String name = interfaceName + LOCATOR;
String projectName = super.getProjectName(NabuccoModelType.ADAPTER,
NabuccoModifierComponentMapper.getModifierType(nabuccoAdapter.nodeToken.tokenImage));
try {
// Load Template
JavaCompilationUnit unit = super.extractAst(NabuccoJavaTemplateConstants.ADAPTER_LOCATOR_TEMPLATE);
TypeDeclaration type = unit.getType(NabuccoJavaTemplateConstants.ADAPTER_LOCATOR_TEMPLATE);
// Name and Package
javaFactory.getJavaAstType().setTypeName(type, name);
javaFactory.getJavaAstUnit().setPackage(unit.getUnitDeclaration(), pkg);
this.configureExtension(interfaceName, type);
this.configureSingleton(interfaceName, type);
this.configureConstructor(interfaceName, type);
this.configureGetter(interfaceName, type);
// Javadoc
NabuccoToJavaJavadocCreator.createJavadoc("Locator for " + interfaceName + PKG_SEPARATOR, type);
JavaAstSupport.convertAstNodes(unit, this.getVisitorContext().getContainerList(), this.getVisitorContext()
.getImportList());
// File creation
unit.setProjectName(projectName);
unit.setSourceFolder(super.getSourceFolder());
target.getModel().getUnitList().add(unit);
} catch (JavaModelException jme) {
logger.error(jme, "Error during Java AST adapter modification.");
throw new NabuccoVisitorException("Error during Java AST adapter modification.", jme);
} catch (JavaTemplateException te) {
logger.error(te, "Error during Java template adapter processing.");
throw new NabuccoVisitorException("Error during Java template adapter processing.", te);
}
}
/**
* Configures the locator super class and interface.
*
* @param adapterName
* name of the adapter interface
* @param type
* the type to modify
*/
private void configureExtension(String adapterName, TypeDeclaration type) {
ParameterizedSingleTypeReference superType = (ParameterizedSingleTypeReference) type.superclass;
SingleTypeReference param = (SingleTypeReference) superType.typeArguments[0];
param.token = adapterName.toCharArray();
superType = (ParameterizedSingleTypeReference) type.superInterfaces[0];
param = (SingleTypeReference) superType.typeArguments[0];
param.token = adapterName.toCharArray();
}
/**
* Configures the singleton call method of the locator.
*
* @param adapterName
* name of the locator
* @param type
* the type to modify
*
* @throws JavaModelException
*/
private void configureSingleton(String adapterName, TypeDeclaration type) throws JavaModelException {
String name = adapterName + LOCATOR;
JavaAstModelProducer javaProducer = JavaAstModelProducer.getInstance();
JavaAstElementFactory javaFactory = JavaAstElementFactory.getInstance();
TypeReference locatorType = javaProducer.createTypeReference(name, false);
TypeReference adapterType = javaProducer.createTypeReference(adapterName, false);
// Singleton Field
FieldDeclaration field = javaFactory.getJavaAstType().getField(type, SINGLETON_INSTANCE);
field.type = locatorType;
// Method getInstance()
MethodDeclaration method = (MethodDeclaration) javaFactory.getJavaAstType().getMethod(type, GET_INSTANCE);
javaFactory.getJavaAstMethod().setReturnType(method, locatorType);
IfStatement ifStatement = (IfStatement) method.statements[0];
Assignment thenAssignment = (Assignment) ((Block) ifStatement.thenStatement).statements[0];
AllocationExpression constructorCall = (AllocationExpression) thenAssignment.expression;
constructorCall.type = locatorType;
((QualifiedNameReference) constructorCall.arguments[0]).tokens[0] = adapterName.toCharArray();
((ClassLiteralAccess) constructorCall.arguments[1]).type = adapterType;
}
/**
* Configures the private constructor of the locator.
*
* @param adapterName
* name of the adapter interface
* @param type
* the type to modify
*
* @throws JavaModelException
*/
private void configureConstructor(String adapterName, TypeDeclaration type) throws JavaModelException {
String name = adapterName + LOCATOR;
JavaAstElementFactory javaFactory = JavaAstElementFactory.getInstance();
JavaAstMethodSignature constructorSignature = new JavaAstMethodSignature(name, CONSTRUCTOR_ARGUMENTS);
ConstructorDeclaration constructor = javaFactory.getJavaAstType().getConstructor(type, constructorSignature);
List<Argument> arguments = javaFactory.getJavaAstMethod().getAllArguments(constructor);
this.changeGenerics(adapterName, arguments);
}
/**
* Changes the generic types of the constructor arguments.
*
* @param adapterName
* the adapter name
* @param arguments
* the constructor arguments
*
* @throws JavaModelException
*/
private void changeGenerics(String adapterName, List<Argument> arguments) throws JavaModelException {
if (arguments.size() != 2) {
throw new IllegalStateException("");
}
TypeReference adapterType = JavaAstModelProducer.getInstance().createTypeReference(adapterName, false);
TypeReference argumentType = arguments.get(1).type;
if (!(argumentType instanceof ParameterizedSingleTypeReference)) {
throw new IllegalStateException("Argument is not parameterized.");
}
ParameterizedSingleTypeReference type = (ParameterizedSingleTypeReference) argumentType;
type.typeArguments[0] = adapterType;
}
/**
* Changes the adapter getter.
*
* @param adapterName
* name of the adapter
* @param type
* the java type
*
* @throws JavaModelException
*/
private void configureGetter(String adapterName, TypeDeclaration type) throws JavaModelException {
JavaAstModelProducer producer = JavaAstModelProducer.getInstance();
JavaAstMethod methodFactory = JavaAstElementFactory.getInstance().getJavaAstMethod();
TypeReference adapterInterface = producer.createTypeReference(adapterName, false);
TypeReference localInterface = producer.createTypeReference(adapterName + ServerConstants.LOCAL, false);
MethodDeclaration getAdapter = (MethodDeclaration) JavaAstElementFactory.getInstance().getJavaAstType()
.getMethod(type, new JavaAstMethodSignature("getAdapter"));
// Return type;
methodFactory.setReturnType(getAdapter, adapterInterface);
// Statement 1 (super.getAdapter())
LocalDeclaration adapter = (LocalDeclaration) getAdapter.statements[0];
adapter.type = adapterInterface;
// Statement 2 (If Statement)
IfStatement ifStatement = (IfStatement) getAdapter.statements[1];
InstanceOfExpression condition = (InstanceOfExpression) ifStatement.condition;
condition.type = localInterface;
// Return
Block then = (Block) ifStatement.thenStatement;
ReturnStatement returnStatement = (ReturnStatement) then.statements[0];
AllocationExpression allocation = (AllocationExpression) returnStatement.expression;
allocation.type = producer.createTypeReference(adapterName + ServerConstants.LOCAL + ServerConstants.PROXY,
false);
// Cast
CastExpression cast = (CastExpression) allocation.arguments[0];
cast.type = localInterface;
}
}