Package org.openrewrite.java.migrate.lang

Class NullCheck

java.lang.Object
org.openrewrite.java.migrate.lang.NullCheck
All Implemented Interfaces:
org.openrewrite.trait.Trait<org.openrewrite.java.tree.J.If>
public class NullCheck extends Object implements org.openrewrite.trait.Trait<org.openrewrite.java.tree.J.If>

  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Class
    Description
    static class 
    NullCheck.Matcher
     

  • Constructor Summary

    Constructors
    Constructor
    Description
    NullCheck()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    couldModifyNullCheckedValue()
    Calculates few potential cases where the null checked variable gets reassigned and only returns false if these cases DO NOT match.
    boolean
    returns()
     
    @Nullable org.openrewrite.java.tree.Statement
    whenNotNull()
     
    org.openrewrite.java.tree.Statement
    whenNull()
     

    Methods inherited from class java.lang.Object

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

    Methods inherited from interface org.openrewrite.trait.Trait

    getCursor, getTree

  • Constructor Details

    • NullCheck

      public NullCheck()

  • Method Details

    • whenNull

      public org.openrewrite.java.tree.Statement whenNull()

    • whenNotNull

      public @Nullable org.openrewrite.java.tree.Statement whenNotNull()

    • returns

      public boolean returns()

    • couldModifyNullCheckedValue

      public boolean couldModifyNullCheckedValue()
      Calculates few potential cases where the null checked variable gets reassigned and only returns false if these cases DO NOT match. In any other case this returns true as we do not know that particular situation yet -> no harm -> assume it could be altered in the block.
      Returns:
      false only if we are 100% sure the block does not reassigns/changes the null checked variable.