/*
* Copyright 2015, The Querydsl Team (http://www.querydsl.com/team)
*
* 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 com.querydsl.apt;
import java.util.*;
import javax.lang.model.element.Element;
import javax.lang.model.element.ExecutableElement;
import javax.lang.model.element.TypeElement;
import javax.lang.model.element.VariableElement;
import javax.lang.model.type.TypeMirror;
import javax.lang.model.util.ElementFilter;
import com.google.common.collect.ImmutableList;
import com.mysema.codegen.model.Constructor;
import com.mysema.codegen.model.Parameter;
import com.mysema.codegen.model.Type;
import com.mysema.codegen.model.TypeCategory;
import com.querydsl.codegen.EntityType;
import com.querydsl.codegen.Property;
import com.querydsl.codegen.QueryTypeFactory;
import com.querydsl.codegen.TypeMappings;
import com.querydsl.core.annotations.PropertyType;
import com.querydsl.core.annotations.QueryInit;
import com.querydsl.core.annotations.QueryType;
import com.querydsl.core.util.Annotations;
import com.querydsl.core.util.BeanUtils;
/**
* {@code TypeElementHandler} is an APT visitor for entity types
*
* @author tiwe
*
*/
final class TypeElementHandler {
private final TypeMappings typeMappings;
private final QueryTypeFactory queryTypeFactory;
private final Configuration configuration;
private final ExtendedTypeFactory typeFactory;
public TypeElementHandler(Configuration configuration, ExtendedTypeFactory typeFactory,
TypeMappings typeMappings, QueryTypeFactory queryTypeFactory) {
this.configuration = configuration;
this.typeFactory = typeFactory;
this.typeMappings = typeMappings;
this.queryTypeFactory = queryTypeFactory;
}
public EntityType handleEntityType(TypeElement element) {
EntityType entityType = typeFactory.getEntityType(element.asType(), true);
List<? extends Element> elements = element.getEnclosedElements();
VisitorConfig config = configuration.getConfig(element, elements);
Set<String> blockedProperties = new HashSet<String>();
Map<String, TypeMirror> propertyTypes = new HashMap<String, TypeMirror>();
Map<String, TypeMirror> fixedTypes = new HashMap<String, TypeMirror>();
Map<String, Annotations> propertyAnnotations = new HashMap<String, Annotations>();
// constructors
if (config.visitConstructors()) {
handleConstructors(entityType, elements);
}
// fields
if (config.visitFieldProperties()) {
for (VariableElement field : ElementFilter.fieldsIn(elements)) {
String name = field.getSimpleName().toString();
if (configuration.isBlockedField(field)) {
blockedProperties.add(name);
} else if (configuration.isValidField(field)) {
Annotations annotations = new Annotations();
configuration.inspect(field, annotations);
annotations.addAnnotation(field.getAnnotation(QueryType.class));
annotations.addAnnotation(field.getAnnotation(QueryInit.class));
propertyAnnotations.put(name, annotations);
propertyTypes.put(name, field.asType());
TypeMirror fixedType = configuration.getRealType(field);
if (fixedType != null) {
fixedTypes.put(name, fixedType);
}
}
}
}
// methods
if (config.visitMethodProperties()) {
for (ExecutableElement method : ElementFilter.methodsIn(elements)) {
String name = method.getSimpleName().toString();
if (name.startsWith("get") && name.length() > 3 && method.getParameters().isEmpty()) {
name = BeanUtils.uncapitalize(name.substring(3));
} else if (name.startsWith("is") && name.length() > 2 && method.getParameters().isEmpty()) {
name = BeanUtils.uncapitalize(name.substring(2));
} else {
continue;
}
if (configuration.isBlockedGetter(method)) {
blockedProperties.add(name);
} else if (configuration.isValidGetter(method) && !blockedProperties.contains(name)) {
Annotations annotations = propertyAnnotations.get(name);
if (annotations == null) {
annotations = new Annotations();
propertyAnnotations.put(name, annotations);
}
configuration.inspect(method, annotations);
annotations.addAnnotation(method.getAnnotation(QueryType.class));
annotations.addAnnotation(method.getAnnotation(QueryInit.class));
propertyTypes.put(name, method.getReturnType());
TypeMirror fixedType = configuration.getRealType(method);
if (fixedType != null) {
fixedTypes.put(name, fixedType);
}
}
}
}
// fixed types override property types
propertyTypes.putAll(fixedTypes);
for (Map.Entry<String, Annotations> entry : propertyAnnotations.entrySet()) {
Property property = toProperty(entityType, entry.getKey(), propertyTypes.get(entry.getKey()), entry.getValue());
if (property != null) {
entityType.addProperty(property);
}
}
return entityType;
}
private Property toProperty(EntityType entityType, String name, TypeMirror type,
Annotations annotations) {
// type
Type propertyType = typeFactory.getType(type, true);
if (annotations.isAnnotationPresent(QueryType.class)) {
PropertyType propertyTypeAnn = annotations.getAnnotation(QueryType.class).value();
if (propertyTypeAnn != PropertyType.NONE) {
TypeCategory typeCategory = TypeCategory.valueOf(annotations.getAnnotation(QueryType.class).value().name());
if (typeCategory == null) {
return null;
}
propertyType = propertyType.as(typeCategory);
} else {
return null;
}
}
// inits
List<String> inits = Collections.emptyList();
if (annotations.isAnnotationPresent(QueryInit.class)) {
inits = ImmutableList.copyOf(annotations.getAnnotation(QueryInit.class).value());
}
return new Property(entityType, name, propertyType, inits);
}
public EntityType handleProjectionType(TypeElement e) {
Type c = typeFactory.getType(e.asType(), true);
EntityType entityType = new EntityType(c.as(TypeCategory.ENTITY), configuration.getVariableNameFunction());
typeMappings.register(entityType, queryTypeFactory.create(entityType));
List<? extends Element> elements = e.getEnclosedElements();
handleConstructors(entityType, elements);
return entityType;
}
private Type getType(VariableElement element) {
Type rv = typeFactory.getType(element.asType(), true);
if (element.getAnnotation(QueryType.class) != null) {
QueryType qt = element.getAnnotation(QueryType.class);
if (qt.value() != PropertyType.NONE) {
TypeCategory typeCategory = TypeCategory.valueOf(qt.value().name());
rv = rv.as(typeCategory);
}
}
return rv;
}
private void handleConstructors(EntityType entityType, List<? extends Element> elements) {
for (ExecutableElement constructor : ElementFilter.constructorsIn(elements)) {
if (configuration.isValidConstructor(constructor)) {
List<Parameter> parameters = transformParams(constructor.getParameters());
entityType.addConstructor(new Constructor(parameters));
}
}
}
public List<Parameter> transformParams(List<? extends VariableElement> params) {
List<Parameter> parameters = new ArrayList<Parameter>(params.size());
for (VariableElement param : params) {
Type paramType = getType(param);
parameters.add(new Parameter(param.getSimpleName().toString(), paramType));
}
return parameters;
}
}