Package org.apache.commons.collections4.functors

Class CatchAndRethrowClosure<E>

  • All Implemented Interfaces:
    Closure<E>
    public abstract class CatchAndRethrowClosure<E>
extends Object
implements Closure<E>
    Closure that catches any checked exception and re-throws it as a FunctorException runtime exception. Example usage: 
     // Create a catch and re-throw closure via anonymous subclass
 CatchAndRethrowClosure<String> writer = new ThrowingClosure() {
     private java.io.Writer out = // some writer

     protected void executeAndThrow(String input) throws IOException {
         out.write(input); // throwing of IOException allowed
     }
 };

 // use catch and re-throw closure
 java.util.List<String> strList = // some list
 try {
     CollectionUtils.forAllDo(strList, writer);
 } catch (FunctorException ex) {
     Throwable originalError = ex.getCause();
     // handle error
 }
    Since:
    4.0

    • Constructor Detail

      • CatchAndRethrowClosure

        public CatchAndRethrowClosure()

    • Method Detail

      • execute

        public void execute​(E input)
        Execute this closure on the specified input object.
        Specified by:
        execute in interface Closure<E>
        Parameters:
        input - the input to execute on
        Throws:
        FunctorException - (runtime) if the closure execution resulted in a checked exception.

      • executeAndThrow

        protected abstract void executeAndThrow​(E input)
                                 throws Throwable
        Execute this closure on the specified input object.
        Parameters:
        input - the input to execute on
        Throws:
        Throwable - if the closure execution resulted in a checked exception.