org.apache.paimon.codegen.codesplit

Class FunctionSplitter

java.lang.Object

org.apache.paimon.codegen.codesplit.FunctionSplitter

All Implemented Interfaces:

CodeRewriter

public class FunctionSplitter
extends Object
implements CodeRewriter

Split long functions into several smaller functions.

This rewriter only deals with functions without return values. Functions with return values should have been converted by ReturnValueRewriter. For functions with return statements, this rewriter will add a check for early returns with the help of AddBoolBeforeReturnRewriter.

Before

 public class Example {
     public void myFun(int a, int b) {
         a += b;
         b += a;
         if (a > 0) {
             return;
         }
         a *= 2;
         b *= 2;
         System.out.println(a);
         System.out.println(b);
     }
 }
 

After

 public class Example {
     boolean myFunHasReturned$0;

     public void myFun(int a, int b) {
         myFunHasReturned$0 = false;
         myFun_split1(a, b);

         myFun_split2(a, b);
         if (myFunHasReturned$0) {
             return;
         }

         myFun_split3(a, b);
     }

     void myFun_split1(int a, int b) {
         a += b;
         b += a;
     }

     void myFun_split2(int a, int b) {
         if (a > 0) {
             {
                 myFunHasReturned$0 = true;
                 return;
             }
         }
     }

     void myFun_split3(int a, int b) {
         a *= 2;
         b *= 2;
         System.out.println(a);
         System.out.println(b);
     }
 }
 

Constructor Summary

Constructors

Constructor and Description
FunctionSplitter(String code, int maxMethodLength)

Method Summary

Modifier and Type	Method and Description
String	rewrite()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FunctionSplitter

public FunctionSplitter(String code,
                        int maxMethodLength)

Method Detail

rewrite

public String rewrite()

Specified by:

rewrite in interface CodeRewriter