FormulaEvaluatorUtil.ExistsHelper (org.faktorips.runtime 21.6.0-SNAPSHOT API)

java.lang.Object
- org.faktorips.runtime.formula.FormulaEvaluatorUtil.ExistsHelper

Enclosing class:

FormulaEvaluatorUtil
```
public abstract static class FormulaEvaluatorUtil.ExistsHelper
extends java.lang.Object
```
Helper class to encapsulate a function call to verify the existence of an object that could result in an Exception (for example a NullPointerException or IndexOutOfBoundsException when navigating over associations in model objects) which should just be treated as a false result.
This class is intended to be subclassed in compiled formulas only.

- Constructor Summary
  
  Constructors
  Constructor Description
  
  ExistsHelper()
- Method Summary
  
  All Methods Instance Methods Abstract Methods Concrete Methods
  Modifier and Type Method Description
  
  boolean exists()
  
  protected abstract boolean existsInternal()
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail
- ExistsHelper
```
public ExistsHelper()
```

Method Detail

exists
```
public boolean exists()
```

existsInternal

protected abstract boolean existsInternal()