java - Java QueryDSL和Gradle Kotlin DSL

Question

我们正在将Groovy gradle构建文件迁移到KotlinDSL，而我一直坚持配置QueryDSL类的生成。

实体类使用Java编写，而QDSL文件也应使用Java。

工作的常规构建文件代码段:

sourceSets {
    generated.java { srcDirs = ['src/main/generated']}
}

task generateQueryDSL(type: JavaCompile, group: 'build', description: 'Generates the QueryDSL query types') {
    source = sourceSets.main.java
    classpath = configurations.compile + configurations.querydslapt
    options.compilerArgs = ["-proc:only", "-processor", "com.mysema.query.apt.jpa.JPAAnnotationProcessor"]
    destinationDir = sourceSets.generated.java.srcDirs.iterator().next()
}

compileJava {
    dependsOn generateQueryDSL
    source generateQueryDSL.destinationDir
}

compileGeneratedJava {
    dependsOn generateQueryDSL
    options.warnings = false
    classpath += sourceSets.main.runtimeClasspath
}

这是我对KotlinDSL中代码的重写:

val querydsl by configurations.creating

val generated by java.sourceSets.creating {
    java.srcDirs("build/generated/java")
}

tasks {
    val generateQueryDsl by creating(JavaCompile::class.java) {
        group = "build"
        description = "Generate QueryDSL classes"
        classpath = configurations.compile + querydsl
        options.compilerArgs = listOf("-proc:only", "-processor", "com.mysema.query.apt.jpa.JPAAnnotationProcessor")
        destinationDir = generated.java.srcDirs.first()
    }

    getByName<JavaCompile>("compileJava") {
        dependsOn(generateQueryDsl)
        source(generateQueryDsl.destinationDir)
    }

    getByName<JavaCompile>("compileGeneratedJava") {
        dependsOn(generateQueryDsl)
        options.isWarnings = false
        classpath += java.sourceSets["main"].runtimeClasspath
    }
}

当我运行 generateQueryDsl任务时，我没有来源，也没有生成QDSL文件:

> Task :common:compileKotlin UP-TO-DATE
> Task :common:generateGrammarSource UP-TO-DATE
> Task :common:compileJava UP-TO-DATE
> Task :common:processResources UP-TO-DATE
> Task :common:classes UP-TO-DATE
> Task :common:inspectClassesForKotlinIC UP-TO-DATE
> Task :common:jar UP-TO-DATE
> Task :common-db:compileKotlin UP-TO-DATE
> Task :common-db:compileJava UP-TO-DATE
> Task :common-db:processResources UP-TO-DATE
> Task :common-db:classes UP-TO-DATE
> Task :common-db:inspectClassesForKotlinIC UP-TO-DATE
> Task :common-db:jar UP-TO-DATE
> Task :core:generateQueryDsl NO-SOURCE

我不确定，但是有种感觉，我可以简化这一代的工作，但是我没有想法。

Answer 1

还有另一种生成QueryDSL Q *类的方法，可用于最新的Gradle版本(我认为> = 4.9):下面是该脚本的Groovy版本，您应该尝试从中制作Kotlin版本:

sourceSets {
    generated.java {
        srcDir file('/build/generated/java')
    }
}

dependencies {
    compile("com.querydsl:querydsl-jpa:${queryDslVersion}")
    compile "org.hibernate.javax.persistence:hibernate-jpa-2.1-api:${hibernateJpaVersion}"

    annotationProcessor "com.querydsl:querydsl-apt:${queryDslVersion}:jpa"
    annotationProcessor "org.hibernate.javax.persistence:hibernate-jpa-2.1-api:${hibernateJpaVersion}"
}
compileJava {
    options.annotationProcessorPath = configurations.annotationProcessor
    options.setAnnotationProcessorGeneratedSourcesDirectory(file("$projectDir/build/generated/java"))
}

这些QueryDSL类将在Java编译任务执行(注释处理器)期间自动生成，您不再需要定义专用任务。