Datomic: DB Functions & Java Compilation Errors

gistfile1.java

import java.util.Map;
import java.util.UUID;

import datomic.Connection;
import datomic.Peer;
import datomic.Util;

public class JavaDbFunction {
  
  /**
   * The DB function is purposely useless since it's only used to
   * demonstrate that Java compiler warnings prevent successful compilation
   * of DB functions.
   */
  public static void main(String[] args) {
    String uri = "datomic:mem://" + UUID.randomUUID();
    Peer.createDatabase(uri);
    Connection conn = Peer.connect(uri);
    
    // Compiler warnings (e.g. "rawtypes") prevent successful compilation. See
    // http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/7-b147/com/sun/tools/javac/util/MandatoryWarningHandler.java#112
    Map iFailFn = Util.map("lang","java","params", Util.list("db", "k", "v"),
      "code",
      "import java.util.*;"+
      "Map m = new HashMap();"+
      "m.put(k,v);"+
      "return list();");
    conn.transact(Util.list(Util.map(":db/id", Peer.tempid("db.part/user"), ":db/ident",
      ":iFail", ":db/fn", Peer.function(iFailFn))));
    
    try {
      conn.transact(Util.list(Util.list(":iFail", "X", "Y"))).get();
      throw new Error("Unreachable");
    } catch (Exception e) {
      e.printStackTrace(System.err);
    }

    // Need to force generic java.lang.Object to make compiler happy
    Map iPassFn = Util.map("lang","java","params", Util.list("db", "k", "v"),
      "code",
      "import java.util.*;"+
      "Map<Object,Object> m = new HashMap<Object,Object>();"+
      "m.put(k,v);"+
      "return list();");
    
    conn.transact(Util.list(Util.map(":db/id", Peer.tempid("db.part/user"), ":db/ident",
      ":iPass", ":db/fn", Peer.function(iPassFn))));
    
    try {
      conn.transact(Util.list(Util.list(":iPass", "X", "Y"))).get();
    } catch (Exception e) {
      throw new Error("Unreachable");
    }
    
    System.out.println("Done.");
  }

}