Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance. Project price only 1 $
You can buy this project and download/modify it how often you want.
/*
* Copyright (C) 2021 ZeoFlow SRL
*
* 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.zeoflow.depot.compiler.processing.javac
import com.zeoflow.depot.compiler.processing.XElement
import com.zeoflow.depot.compiler.processing.XMessager
import com.zeoflow.depot.compiler.processing.XNullability
import com.zeoflow.depot.compiler.processing.XProcessingEnv
import com.zeoflow.depot.compiler.processing.XType
import com.zeoflow.depot.compiler.processing.XTypeElement
import com.zeoflow.depot.compiler.processing.javac.kotlin.KmType
import com.google.auto.common.GeneratedAnnotations
import com.google.auto.common.MoreTypes
import java.util.Locale
import javax.annotation.processing.ProcessingEnvironment
import javax.lang.model.element.Element
import javax.lang.model.element.ElementKind
import javax.lang.model.element.ExecutableElement
import javax.lang.model.element.PackageElement
import javax.lang.model.element.TypeElement
import javax.lang.model.element.VariableElement
import javax.lang.model.type.TypeKind
import javax.lang.model.type.TypeMirror
import javax.lang.model.util.Elements
import javax.lang.model.util.Types
internal class JavacProcessingEnv(
val delegate: ProcessingEnvironment
) : XProcessingEnv {
override val backend: XProcessingEnv.Backend = XProcessingEnv.Backend.JAVAC
val elementUtils: Elements = delegate.elementUtils
val typeUtils: Types = delegate.typeUtils
private val typeElementStore =
XTypeElementStore(
findElement = { qName ->
delegate.elementUtils.getTypeElement(qName)
},
wrap = { typeElement ->
JavacTypeElement.create(this, typeElement)
},
getQName = {
it.qualifiedName.toString()
}
)
override val messager: XMessager by lazy {
JavacProcessingEnvMessager(delegate)
}
override val filer = JavacFiler(delegate)
override val options: Map
get() = delegate.options
override fun findTypeElement(qName: String): JavacTypeElement? {
return typeElementStore[qName]
}
override fun getTypeElementsFromPackage(packageName: String): List {
// Note, to support Java Modules we would need to use "getAllPackageElements",
// but that is only available in Java 9+.
val packageElement = delegate.elementUtils.getPackageElement(packageName)
return packageElement.enclosedElements
.filterIsInstance()
.map { wrapTypeElement(it) }
}
override fun findType(qName: String): XType? {
// check for primitives first
PRIMITIVE_TYPES[qName]?.let {
return wrap(
typeMirror = typeUtils.getPrimitiveType(it),
kotlinType = null,
elementNullability = XNullability.NONNULL
)
}
return findTypeElement(qName)?.type
}
override fun findGeneratedAnnotation(): XTypeElement? {
val element = GeneratedAnnotations.generatedAnnotation(elementUtils, delegate.sourceVersion)
return if (element.isPresent) {
wrapTypeElement(element.get())
} else {
null
}
}
override fun getArrayType(type: XType): JavacArrayType {
check(type is JavacType) {
"given type must be from java, $type is not"
}
return JavacArrayType(
env = this,
typeMirror = typeUtils.getArrayType(type.typeMirror),
nullability = XNullability.UNKNOWN,
knownComponentNullability = type.nullability
)
}
override fun getDeclaredType(type: XTypeElement, vararg types: XType): JavacType {
check(type is JavacTypeElement)
val args = types.map {
check(it is JavacType)
it.typeMirror
}.toTypedArray()
check(
types.all {
it is JavacType
}
)
return wrap(
typeMirror = typeUtils.getDeclaredType(type.element, *args),
// type elements cannot have nullability hence we don't synthesize anything here
kotlinType = null,
elementNullability = type.element.nullability
)
}
fun wrapTypeElement(element: TypeElement) = typeElementStore[element]
/**
* Wraps the given java processing type into an XType.
*
* @param typeMirror TypeMirror from java processor
* @param kotlinType If the type is derived from a kotlin source code, the KmType information
* parsed from kotlin metadata
* @param elementNullability The nullability information parsed from the code. This value is
* ignored if [kotlinType] is provided.
*/
inline fun wrap(
typeMirror: TypeMirror,
kotlinType: KmType?,
elementNullability: XNullability
): T {
return when (typeMirror.kind) {
TypeKind.ARRAY ->
if (kotlinType == null) {
JavacArrayType(
env = this,
typeMirror = MoreTypes.asArray(typeMirror),
nullability = elementNullability,
knownComponentNullability = null
)
} else {
JavacArrayType(
env = this,
typeMirror = MoreTypes.asArray(typeMirror),
kotlinType = kotlinType
)
}
TypeKind.DECLARED ->
if (kotlinType == null) {
JavacDeclaredType(
env = this,
typeMirror = MoreTypes.asDeclared(typeMirror),
nullability = elementNullability
)
} else {
JavacDeclaredType(
env = this,
typeMirror = MoreTypes.asDeclared(typeMirror),
kotlinType = kotlinType
)
}
else ->
if (kotlinType == null) {
DefaultJavacType(
env = this,
typeMirror = typeMirror,
nullability = elementNullability
)
} else {
DefaultJavacType(
env = this,
typeMirror = typeMirror,
kotlinType = kotlinType
)
}
} as T
}
internal fun wrapAnnotatedElement(
element: Element,
annotationName: String
): XElement {
return when (element) {
is VariableElement -> {
wrapVariableElement(element)
}
is TypeElement -> {
wrapTypeElement(element)
}
is ExecutableElement -> {
wrapExecutableElement(element)
}
is PackageElement -> {
error(
"Cannot get elements with annotation $annotationName. Package " +
"elements are not supported by XProcessing."
)
}
else -> error("Unsupported element $element with annotation $annotationName")
}
}
fun wrapExecutableElement(element: ExecutableElement): JavacExecutableElement {
val enclosingType = element.requireEnclosingType(this)
return when (element.kind) {
ElementKind.CONSTRUCTOR -> {
JavacConstructorElement(
env = this,
containing = enclosingType,
element = element
)
}
ElementKind.METHOD -> {
JavacMethodElement(
env = this,
containing = enclosingType,
element = element
)
}
else -> error("Unsupported kind ${element.kind} of executable element $element")
}
}
fun wrapVariableElement(element: VariableElement): JavacVariableElement {
return when (val enclosingElement = element.enclosingElement) {
is ExecutableElement -> {
val executableElement = wrapExecutableElement(enclosingElement)
executableElement.parameters.find { param ->
param.element === element
} ?: error("Unable to create variable element for $element")
}
is TypeElement -> {
JavacFieldElement(this, wrapTypeElement(enclosingElement), element)
}
else -> error("Unsupported enclosing type $enclosingElement for $element")
}
}
companion object {
val PRIMITIVE_TYPES = TypeKind.values().filter {
it.isPrimitive
}.associateBy {
it.name.lowercase(Locale.US)
}
}
}
