/*
* Copyright 2016 Google Inc. All rights reserved.
*
* 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.inferred.freebuilder.processor.naming;
import static javax.tools.Diagnostic.Kind.ERROR;
import static org.inferred.freebuilder.processor.util.ModelUtils.getReturnType;
import com.google.common.base.Optional;
import org.inferred.freebuilder.processor.Metadata.Property;
import java.util.Set;
import javax.annotation.processing.Messager;
import javax.lang.model.element.ExecutableElement;
import javax.lang.model.element.Modifier;
import javax.lang.model.element.TypeElement;
import javax.lang.model.type.TypeKind;
import javax.lang.model.type.TypeMirror;
import javax.lang.model.util.Types;
class PrefixlessConvention implements NamingConvention {
PrefixlessConvention(Messager messager, Types types) {
this.messager = messager;
this.types = types;
}
private final Messager messager;
private final Types types;
@Override
public Optional<Property.Builder> getPropertyNames(
TypeElement valueType, ExecutableElement method) {
if (!methodIsAbstractGetter(valueType, method)) {
return Optional.absent();
}
String name = method.getSimpleName().toString();
String capitalizedName = name.substring(0, 1).toUpperCase() + name.substring(1);
return Optional.of(new Property.Builder()
.setUsingBeanConvention(false)
.setName(name)
.setCapitalizedName(capitalizedName)
.setGetterName(name));
}
/**
* Verifies {@code method} is an abstract getter. Any deviations will be logged as an error.
*/
private boolean methodIsAbstractGetter(TypeElement valueType, ExecutableElement method) {
Set<Modifier> modifiers = method.getModifiers();
if (!modifiers.contains(Modifier.ABSTRACT)) {
return false;
}
boolean declaredOnValueType = method.getEnclosingElement().equals(valueType);
TypeMirror returnType = getReturnType(valueType, method, types);
if (returnType.getKind() == TypeKind.VOID || !method.getParameters().isEmpty()) {
if (declaredOnValueType) {
messager.printMessage(
ERROR,
"Only getter methods may be declared abstract on @FreeBuilder types",
method);
} else {
printNoImplementationMessage(valueType, method);
}
return false;
}
return true;
}
private void printNoImplementationMessage(TypeElement valueType, ExecutableElement method) {
messager.printMessage(
ERROR,
"No implementation found for non-getter method '" + method + "'; "
+ "cannot generate @FreeBuilder implementation",
valueType);
}
}