com.zeoflow.depot.compiler.processing.javac.JavacRoundEnv.kt Maven / Gradle / Ivy

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/*
 * 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.XRoundEnv
import com.google.auto.common.MoreElements
import javax.annotation.processing.RoundEnvironment
import javax.lang.model.element.Element
import kotlin.reflect.KClass

@Suppress("UnstableApiUsage")
internal class JavacRoundEnv(
    private val env: JavacProcessingEnv,
    val delegate: RoundEnvironment
) : XRoundEnv {
    override val rootElements: Set by lazy {
        delegate.rootElements.map {
            check(MoreElements.isType(it))
            env.wrapTypeElement(MoreElements.asType(it))
        }.toSet()
    }

    override fun getElementsAnnotatedWith(klass: KClass): Set {
        val elements = delegate.getElementsAnnotatedWith(klass.java)
        return wrapAnnotatedElements(elements, klass.java.canonicalName)
    }

    override fun getElementsAnnotatedWith(annotationQualifiedName: String): Set {
        val element = env.elementUtils.getTypeElement(annotationQualifiedName)
            ?: error("Cannot find TypeElement: $annotationQualifiedName")

        val elements = delegate.getElementsAnnotatedWith(element)

        return wrapAnnotatedElements(elements, annotationQualifiedName)
    }

    private fun wrapAnnotatedElements(
        elements: Set,
        annotationName: String
    ): Set {
        return elements.map { env.wrapAnnotatedElement(it, annotationName) }.toSet()
    }
}