ElementExt.kt
/*
* Copyright (C) 2020 The Android Open Source Project
*
* 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 androidx.room.compiler.processing.javac
import androidx.room.compiler.processing.XNullability
import com.google.auto.common.MoreElements
import javax.lang.model.element.Element
private val NONNULL_ANNOTATIONS = arrayOf(
"androidx.annotation.NonNull",
"org.jetbrains.annotations.NotNull"
)
private val NULLABLE_ANNOTATIONS = arrayOf(
"androidx.annotation.Nullable",
"org.jetbrains.annotations.Nullable"
)
@Suppress("UnstableApiUsage")
private fun Element.hasAnyOf(annotations: Array<String>) =
annotationMirrors.any { annotationMirror ->
val annotationTypeElement = MoreElements.asType(annotationMirror.annotationType.asElement())
annotations.any { annotationTypeElement.qualifiedName.contentEquals(it) }
}
internal val Element.nullability: XNullability
get() = if (asType().kind.isPrimitive || hasAnyOf(NONNULL_ANNOTATIONS)) {
XNullability.NONNULL
} else if (hasAnyOf(NULLABLE_ANNOTATIONS)) {
XNullability.NULLABLE
} else {
XNullability.UNKNOWN
}
internal fun Element.requireEnclosingType(env: JavacProcessingEnv): JavacTypeElement {
return checkNotNull(enclosingType(env)) {
"Cannot find required enclosing type for $this"
}
}
@Suppress("UnstableApiUsage")
internal fun Element.enclosingType(env: JavacProcessingEnv): JavacTypeElement? {
return if (MoreElements.isType(enclosingElement)) {
env.wrapTypeElement(MoreElements.asType(enclosingElement))
} else {
null
}
}