Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/19082#discussion_r155999993
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
---
@@ -1070,6 +1071,24 @@ class CodegenContext {
}
}
+object CodegenContext {
+
+ private val javaKeywords = Set(
+ "abstract", "assert", "boolean", "break", "byte", "case", "catch",
"char", "class", "const",
+ "continue", "default", "do", "double", "else", "extends", "false",
"final", "finally", "float",
+ "for", "goto", "if", "implements", "import", "instanceof", "int",
"interface", "long", "native",
+ "new", "null", "package", "private", "protected", "public", "return",
"short", "static",
+ "strictfp", "super", "switch", "synchronized", "this", "throw",
"throws", "transient", "true",
+ "try", "void", "volatile", "while"
+ )
+
+ def isJavaIdentifier(str: String): Boolean = str match {
+ case null | "" => false
+ case _ => !javaKeywords.contains(str) &&
isJavaIdentifierStart(str.charAt(0)) &&
+ (1 until str.length).forall(i => isJavaIdentifierPart(str.charAt(i)))
+ }
--- End diff --
```Scala
/**
* Returns true if the given `str` is a valid java identifier.
*/
def isJavaIdentifier(str: String): Boolean = str match {
case null | "" =>
false
case _ =>
!javaKeywords.contains(str) && isJavaIdentifierStart(str.charAt(0)) &&
(1 until str.length).forall(i =>
isJavaIdentifierPart(str.charAt(i)))
}
```
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