Package org.openmetadata.service.util

Class LambdaExceptionUtil

java.lang.Object

org.openmetadata.service.util.LambdaExceptionUtil

public final class LambdaExceptionUtil
extends Object

Utility class for the streams API.

Wraps consumers and functions into interfaces that can throw Checked Exceptions

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	LambdaExceptionUtil.ComparatorWithExceptions<T,E extends Exception>
static interface	LambdaExceptionUtil.ConsumerWithExceptions<T,E extends Exception>
static interface	LambdaExceptionUtil.FunctionWithExceptions<T,R,E extends Exception>

Constructor Summary

Constructors

Constructor	Description
LambdaExceptionUtil()

Method Summary

Modifier and Type	Method	Description
static <T,E extends Exception> Comparator<T>	ignoringComparator(LambdaExceptionUtil.ComparatorWithExceptions<T,E> comparator)	Wrap a standard Comparator, swallowing all Exception.
static <T,E extends Exception> Comparator<T>	rethrowComparator(LambdaExceptionUtil.ComparatorWithExceptions<T,E> comparator)	Wrap a standard Comparator in a LambdaExceptionUtil.ComparatorWithExceptions.
static <T,E extends Exception> Consumer<T>	rethrowConsumer(LambdaExceptionUtil.ConsumerWithExceptions<T,E> consumer)	Wrap a standard Consumer in a LambdaExceptionUtil.ConsumerWithExceptions.
static <T,R,E extends Exception> Function<T,R>	rethrowFunction(LambdaExceptionUtil.FunctionWithExceptions<T,R,E> function)	Wrap a standard Function in a LambdaExceptionUtil.FunctionWithExceptions.

Methods inherited from class java.lang.Object

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

Constructor Detail

LambdaExceptionUtil

public LambdaExceptionUtil()

Method Detail

rethrowConsumer

public static <T,E extends Exception> Consumer<T> rethrowConsumer(LambdaExceptionUtil.ConsumerWithExceptions<T,E> consumer)

Wrap a standard Consumer in a LambdaExceptionUtil.ConsumerWithExceptions.

This allows a consumer to throw Checked Exception that will be propagated to the context of the statement calling it

Example: Stream.of("java.lang.String", "java.bad.Class").forEach(rethrowConsumer(name -> System.out.println(Class.forName(name)))); throws checked ClassNotFoundException

rethrowFunction

public static <T,R,E extends Exception> Function<T,R> rethrowFunction(LambdaExceptionUtil.FunctionWithExceptions<T,R,E> function)

Wrap a standard Function in a LambdaExceptionUtil.FunctionWithExceptions.

This allows a lambda function to throw Checked Exception that will be propagated to the context of the statement calling it

Example: Stream.of("java.lang.String", "java.bad.Class").map(rethrowFunction(Class::forName))); throws checked ClassNotFoundException

rethrowComparator

public static <T,E extends Exception> Comparator<T> rethrowComparator(LambdaExceptionUtil.ComparatorWithExceptions<T,E> comparator)

Wrap a standard Comparator in a LambdaExceptionUtil.ComparatorWithExceptions.

This allows a comparator to propagate a Checked Exception

Example: List.of("java.lang.String", "java.lang.Integer", "java.bad.Class").sorted((c1, c2) -> Class.forName(c1).getFields().length - Class.forName(c2).getFields().length throws checked ClassNotFoundException

ignoringComparator

public static <T,E extends Exception> Comparator<T> ignoringComparator(LambdaExceptionUtil.ComparatorWithExceptions<T,E> comparator)

Wrap a standard Comparator, swallowing all Exception.

WARNING! When Comparator.compare(T, T) throws an exception the elements are treated as equal. This should only be used for ignoring checked exceptions that can never be throws.