Convert java.util.List into java.sql.Array

Question

How would you convert a java.util.List instance into a java.sql.Array?

Answer 1

The type argument to createArrayOf is the element type, not the array type, so you probably want something like "varchar" or "text". VARIADIC is a function argument modifier, not a type specifier.

Answer 2

Use connection.createArrayOf(...)

For example:

final String[] data = yourList.toArray(new String[yourList.size()]);
final java.sql.Array sqlArray = connection.createArrayOf(typeName, data);
statement.setArray(position, sqlArray);

Where typeName is:

the SQL name of the type the elements of the array map to. The typeName is a database-specific name which may be the name of a built-in type, a user-defined type or a standard SQL type supported by this database. This is the value returned by Array.getBaseTypeName

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As noted in the comments, this is Java 1.6. For older versions you can't create this in a driver-independent way. You are only supposed to get arrays, not create them. If you want to, you can instantiate the implementing class from your jdbc driver, but this is non-portable.