package com.em.validation.rebind.generator.source;
/*
GWT Validation Framework - A JSR-303 validation framework for GWT
(c) 2008 gwt-validation contributors (http://code.google.com/p/gwt-validation/)
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you 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.
*/
import java.lang.annotation.Annotation;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.UUID;
import javax.validation.ConstraintValidator;
import com.em.validation.rebind.AbstractConstraintDescriptorGenerator;
import com.em.validation.rebind.metadata.ClassDescriptor;
import com.em.validation.rebind.metadata.ConstraintMetadata;
import com.em.validation.rebind.resolve.ConstraintDescriptionResolver;
import com.em.validation.rebind.template.TemplateController;
/**
* Lazy singleton for generating annotations.
*
* @author chris
*
*/
public enum ConstraintDescriptionGenerator {
INSTANCE;
private final String BASE_PACKAGE = "com.em.validation.client";
private final String TARGET_PACKAGE = this.BASE_PACKAGE + ".generated.constraints";
private final String PREFIX = "ConstraintDescriptor";
private static class SourceConstraintDescriptorGenerator extends AbstractConstraintDescriptorGenerator<ClassDescriptor> {
@Override
protected ClassDescriptor create(ConstraintMetadata metadata) {
//class descriptor
ClassDescriptor descriptor = new ClassDescriptor();
//uuid
UUID uuid = UUID.randomUUID();
String uuidString = uuid.toString();
uuidString = uuidString.replaceAll("\\-","");
//create generation target annotation name
String generatedConstraintName = ConstraintDescriptionGenerator.INSTANCE.getClassPrefix() + "_" + uuidString;
String fullGeneratedConstraintName = ConstraintDescriptionGenerator.INSTANCE.getTargetPackage() + "." +generatedConstraintName;
//generate constraint descriptor
descriptor.setFullClassName(fullGeneratedConstraintName);
descriptor.setClassName(generatedConstraintName);
descriptor.setPackageName(ConstraintDescriptionGenerator.INSTANCE.getTargetPackage());
return descriptor;
}
@Override
protected void recurse(ClassDescriptor withDescriptor, ConstraintMetadata metadata) {
withDescriptor.getDependencies().add(this.getConstraintDescriptor(metadata));
}
@Override
protected ClassDescriptor finish(ClassDescriptor withDescriptor, ConstraintMetadata metadata) {
Set<String> constraintValidatorClassNames = new HashSet<String>();
for(Class<? extends ConstraintValidator<?, ?>> validator : metadata.getValidatedBy()) {
String className = validator.getName();
if(validator.isMemberClass()) {
className = className.replaceAll("\\$", ".");
}
constraintValidatorClassNames.add(className);
}
String annotationName = metadata.getName();
String annotationSimpleName = metadata.getSimpleName();
String annotationImportName = metadata.getName();
String annotationType = annotationName + ".class";
//initialize
Map<String,Object> generatedAnnotationModel = new HashMap<String, Object>();
//create fake annotation data model
generatedAnnotationModel.put("targetPackage", ConstraintDescriptionGenerator.INSTANCE.getTargetPackage());
generatedAnnotationModel.put("generatedName", withDescriptor.getClassName());
generatedAnnotationModel.put("fullGeneratedAnnotationName",withDescriptor.getFullClassName());
generatedAnnotationModel.put("annotationMetadata",metadata.getMethodMap().values());
generatedAnnotationModel.put("composedOf", withDescriptor.getDependencies());
generatedAnnotationModel.put("reportAsSingleViolation", String.valueOf(metadata.isReportAsSingleViolation()));
generatedAnnotationModel.put("signature",metadata.toString());
generatedAnnotationModel.put("annotationType", annotationType);
generatedAnnotationModel.put("annotationImportName", annotationImportName);
generatedAnnotationModel.put("targetAnnotation",annotationSimpleName);
generatedAnnotationModel.put("validatedBy",constraintValidatorClassNames);
//finally generate class contents
withDescriptor.setClassContents(TemplateController.INSTANCE.processTemplate("templates/constraint/ConstraintDescriptor.ftl", generatedAnnotationModel));
return withDescriptor;
}
}
private SourceConstraintDescriptorGenerator generator = null;
private ConstraintDescriptionGenerator() {
this.generator = new SourceConstraintDescriptorGenerator();
}
public ClassDescriptor generateConstraintDescriptor(Annotation annotation, Class<?> elementType) {
//get annotation metadata
ConstraintMetadata metadata = ConstraintDescriptionResolver.INSTANCE.getConstraintMetadata(annotation,elementType);
//turn metadata into descriptor
ClassDescriptor descriptor = this.generator.getConstraintDescriptor(metadata);
//return descriptor
return descriptor;
}
public String getTargetPackage() {
return this.TARGET_PACKAGE;
}
public String getClassPrefix() {
return this.PREFIX;
}
}