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 com.google.auto.common.MoreTypes
import javax.lang.model.element.Element
import javax.lang.model.element.TypeElement
import javax.lang.model.element.VariableElement
import javax.lang.model.type.TypeKind
import javax.lang.model.util.ElementFilter
import javax.lang.model.util.Elements
private val NONNULL_ANNOTATIONS = arrayOf(
androidx.annotation.NonNull::class.java,
org.jetbrains.annotations.NotNull::class.java
)
private val NULLABLE_ANNOTATIONS = arrayOf(
androidx.annotation.Nullable::class.java,
org.jetbrains.annotations.Nullable::class.java
)
/**
* gets all members including super privates. does not handle duplicate field names!!!
*/
// TODO handle conflicts with super: b/35568142
internal fun TypeElement.getAllFieldsIncludingPrivateSupers(
elementUtils: Elements
): Set<VariableElement> {
val myMembers = ElementFilter.fieldsIn(elementUtils.getAllMembers(this))
.filterIsInstance<VariableElement>()
.toSet()
if (superclass.kind != TypeKind.NONE) {
return myMembers + MoreTypes.asTypeElement(superclass)
.getAllFieldsIncludingPrivateSupers(elementUtils)
} else {
return myMembers
}
}
@Suppress("UnstableApiUsage")
private fun Element.hasAnyOf(annotations: Array<Class<out Annotation>>) = annotations.any {
MoreElements.isAnnotationPresent(this, 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
}
}