org.apache.commons.collections4.functors

Class CatchAndRethrowClosure<E>

java.lang.Object

org.apache.commons.collections4.functors.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 Summary

Constructors

Constructor and Description
CatchAndRethrowClosure()

Method Summary

Modifier and Type	Method and Description
void	execute(E input) Execute this closure on the specified input object.
protected abstract void	executeAndThrow(E input) Execute this closure on the specified input object.

Methods inherited from class java.lang.Object

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

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.