JarCastingagile4j-model-builder
agile4j-model-builder是用Kotlin语言实现的model构建器，可在Kotlin/Java工程中使用。
如何引入
Gradle
dependencies {
compile "com.agile4j:agile4j-model-builder:1.1.3"
}
Maven
<dependency>
<groupId>com.agile4j</groupId>
<artifactId>agile4j-model-builder</artifactId>
<version>1.1.3</version>
</dependency>
如何使用
step1.定义Target
- 通过API
inJoin、exJoin，在target中进行关联关系的声明，例如：
data class ArticleView (val article: Article) {
val user: User? by inJoin(Article::userId)
val commentViews: Collection<CommentView>? by exJoin(::getCommentIdsByArticleIds)
val userName: String? get() = user?.userName
}
data class CommentView(val comment: Comment) {
val isLiked: Boolean? by exJoin(::isLikedComment)
val isLikeShowMsg:String get() = if (isLiked == true) "是" else "否"
}
step2.声明Relation
- 通过API
indexBy、buildBy、targets，声明Relation，例如：
fun initModelBuilder() {
Article::class {
indexBy(Article::id)
buildBy(::getArticleByIds)
targets(ArticleView::class)
}
User::class {
indexBy(User::id)
buildBy(::getUserByIds)
}
Comment::class {
indexBy(Comment::id)
buildBy(::getCommentByIds)
targets(CommentView::class)
}
}
step3.构建Target
- 通过API
mapMulti、mapSingle，构建target对象，例如：
val articleViews = articleIds mapMulti ArticleView::class