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https://issues.apache.org/jira/browse/GROOVY-8258?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16090736#comment-16090736
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Paul King commented on GROOVY-8258:
-----------------------------------
Sure, there is no problem with thinking about things from different approaches!
In fact, it's useful to go both directions sometimes. :-)
But in terms of merging into the main branches, we could merge a PR that was
improving the underlying APIs to make them stream-aware (without any DSL), but
I would most likely be -1 on a PR that was just the DSL without the underlying
API changes. Doesn't mean we have can't start an incomplete feature branch of
course to get the ball rolling.
> Create a LINQ-like DSL
> ----------------------
>
> Key: GROOVY-8258
> URL: https://issues.apache.org/jira/browse/GROOVY-8258
> Project: Groovy
> Issue Type: Improvement
> Reporter: Daniel Sun
>
> *Pojos:*
> {code:java}
> class Category {
> String name
> List<Article> articles
> }
> class Article {
> String name
> Integer voteCount
> String categoryName
> }
> {code}
> *Example1:*
> {code:java}
> linq { // return an Iterator<Map<String, Object>>
> from c of categories
> join a of articles on a.categoryName == c.name // join
> where c.name == 'Groovy'
> orderBy a.voteCount desc // order by
> limit 100 offset 50 // pagination
> select { // create a map, its keys: articleName, voteNum, categoryName
> articleName = a.name
> a.voteCount
> categoryName = c.name
> }
> }
> {code}
> *Example2:*
> {code:java}
> linq { // return an Iterator<Map<String, Object>>
> from c of categories
> join a of {
> from tempA of articles
> where tempA.voteCount > 10
> select tempA
> } on a.categoryName == c.name // join
> where c.name == 'Groovy'
> orderBy a.voteCount desc // order by
> limit 100 offset 50 // pagination
> select { // create a map, its keys: articleName, voteNum, categoryName
> articleName = a.name
> a.voteCount
> categoryName = c.name
> }
> }
> {code}
> *Example3:*
> {code:java}
> linq { // return an Iterator<Article>
> from c of categories
> from a of c.articles // another join
> where c.name == 'Groovy'
> orderBy a.voteCount desc // order by
> select Article { // create an Article instance
> a.name
> a.voteCount
> categoryName = c.name
> }
> }
> {code}
> *TO BE CONTINUED...*
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