com.google.auto.value.processor.GwtCompatibility Maven / Gradle / Ivy
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Immutable value-type code generation for Java 1.6+.
/*
* Copyright 2014 Google LLC
*
* 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.google.auto.value.processor;
import static java.util.stream.Collectors.joining;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import javax.lang.model.element.AnnotationMirror;
import javax.lang.model.element.AnnotationValue;
import javax.lang.model.element.ExecutableElement;
import javax.lang.model.element.Name;
import javax.lang.model.element.TypeElement;
class GwtCompatibility {
private final Optional gwtCompatibleAnnotation;
GwtCompatibility(TypeElement type) {
Optional gwtCompatibleAnnotation = Optional.empty();
List extends AnnotationMirror> annotations = type.getAnnotationMirrors();
for (AnnotationMirror annotation : annotations) {
Name name = annotation.getAnnotationType().asElement().getSimpleName();
if (name.contentEquals("GwtCompatible")) {
gwtCompatibleAnnotation = Optional.of(annotation);
}
}
this.gwtCompatibleAnnotation = gwtCompatibleAnnotation;
}
Optional gwtCompatibleAnnotation() {
return gwtCompatibleAnnotation;
}
// Get rid of the misconceived extends ExecutableElement, ? extends AnnotationValue>
// in the return type of getElementValues().
static Map getElementValues(AnnotationMirror annotation) {
return Collections.unmodifiableMap(
annotation.getElementValues());
}
String gwtCompatibleAnnotationString() {
if (gwtCompatibleAnnotation.isPresent()) {
AnnotationMirror annotation = gwtCompatibleAnnotation.get();
TypeElement annotationElement = (TypeElement) annotation.getAnnotationType().asElement();
String annotationArguments;
if (annotation.getElementValues().isEmpty()) {
annotationArguments = "";
} else {
annotationArguments =
getElementValues(annotation).entrySet().stream()
.map(e -> e.getKey().getSimpleName() + " = " + e.getValue())
.collect(joining(", ", "(", ")"));
}
return "@" + annotationElement.getQualifiedName() + annotationArguments;
} else {
return "";
}
}
}
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