Functions.java whitspaces
Replace tabs with four spaces, as per the project's Checkstyle rules.
This commit is contained in:
Allon Mureinik
parent
962e529984
commit
c5eadb1c6d
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@ -46,323 +46,323 @@ import java.lang.reflect.UndeclaredThrowableException;
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* Lambda expressions is met better than the second version.
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*/
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public class Functions {
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@FunctionalInterface
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public interface FailableRunnable<T extends Throwable> {
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/**
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* Runs the function.
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* @throws T if the function fails
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*/
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void run() throws T;
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}
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@FunctionalInterface
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public interface FailableCallable<O, T extends Throwable> {
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/**
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* Calls the callable.
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* @return The value returned from the callable
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* @throws T if the callable fails
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*/
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O call() throws T;
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}
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@FunctionalInterface
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public interface FailableConsumer<O, T extends Throwable> {
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/**
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* Accepts the consumer.
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* @param pObject the parameter for the consumable to accept
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* @throws T if the consumer fails
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*/
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void accept(O pObject) throws T;
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}
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@FunctionalInterface
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public interface FailableBiConsumer<O1, O2, T extends Throwable> {
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/**
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* Accepts the consumer.
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* @param pObject1 the first parameter for the consumable to accept
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* @param pObject2 the second parameter for the consumable to accept
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* @throws T if the consumer fails
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*/
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void accept(O1 pObject1, O2 pObject2) throws T;
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}
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@FunctionalInterface
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public interface FailableFunction<I, O, T extends Throwable> {
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/**
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* Apply the function.
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* @param pInput the input for the function
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* @return the result of the function
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* @throws T if the function fails
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*/
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O apply(I pInput) throws T;
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}
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@FunctionalInterface
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public interface FailableBiFunction<I1, I2, O, T extends Throwable> {
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/**
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* Apply the function.
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* @param pInput1 the first input for the function
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* @param pInput2 the second input for the function
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* @return the result of the function
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* @throws T if the function fails
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*/
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O apply(I1 pInput1, I2 pInput2) throws T;
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}
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@FunctionalInterface
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public interface FailablePredicate<O, T extends Throwable> {
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/**
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* Test the predicate.
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* @param pObject the object to test the predicate on
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* @return the predicate's evaluation
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* @throws T if the predicate fails
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*/
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boolean test(O pObject) throws T;
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}
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@FunctionalInterface
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public interface FailableBiPredicate<O1, O2, T extends Throwable> {
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/**
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* Test the predicate.
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* @param pObject1 the first object to test the predicate on
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* @param pObject2 the second object to test the predicate on
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* @return the predicate's evaluation
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* @throws T if the predicate fails
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*/
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boolean test(O1 pObject1, O2 pObject2) throws T;
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}
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@FunctionalInterface
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public interface FailableRunnable<T extends Throwable> {
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/**
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* Runs the function.
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* @throws T if the function fails
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*/
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void run() throws T;
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}
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@FunctionalInterface
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public interface FailableCallable<O, T extends Throwable> {
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/**
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* Calls the callable.
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* @return The value returned from the callable
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* @throws T if the callable fails
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*/
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O call() throws T;
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}
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@FunctionalInterface
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public interface FailableConsumer<O, T extends Throwable> {
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/**
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* Accepts the consumer.
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* @param pObject the parameter for the consumable to accept
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* @throws T if the consumer fails
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*/
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void accept(O pObject) throws T;
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}
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@FunctionalInterface
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public interface FailableBiConsumer<O1, O2, T extends Throwable> {
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/**
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* Accepts the consumer.
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* @param pObject1 the first parameter for the consumable to accept
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* @param pObject2 the second parameter for the consumable to accept
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* @throws T if the consumer fails
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*/
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void accept(O1 pObject1, O2 pObject2) throws T;
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}
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@FunctionalInterface
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public interface FailableFunction<I, O, T extends Throwable> {
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/**
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* Apply the function.
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* @param pInput the input for the function
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* @return the result of the function
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* @throws T if the function fails
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*/
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O apply(I pInput) throws T;
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}
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@FunctionalInterface
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public interface FailableBiFunction<I1, I2, O, T extends Throwable> {
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/**
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* Apply the function.
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* @param pInput1 the first input for the function
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* @param pInput2 the second input for the function
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* @return the result of the function
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* @throws T if the function fails
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*/
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O apply(I1 pInput1, I2 pInput2) throws T;
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}
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@FunctionalInterface
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public interface FailablePredicate<O, T extends Throwable> {
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/**
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* Test the predicate.
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* @param pObject the object to test the predicate on
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* @return the predicate's evaluation
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* @throws T if the predicate fails
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*/
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boolean test(O pObject) throws T;
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}
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@FunctionalInterface
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public interface FailableBiPredicate<O1, O2, T extends Throwable> {
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/**
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* Test the predicate.
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* @param pObject1 the first object to test the predicate on
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* @param pObject2 the second object to test the predicate on
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* @return the predicate's evaluation
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* @throws T if the predicate fails
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*/
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boolean test(O1 pObject1, O2 pObject2) throws T;
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}
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/**
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* Runs a runnable and rethrows any exception as a {@link RuntimeException}.
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* @param pRunnable The runnable to run
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* @param <T> the type of checked exception the runnable may throw
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*/
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public static <T extends Throwable> void run(FailableRunnable<T> pRunnable) {
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try {
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pRunnable.run();
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} catch (Throwable t) {
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throw rethrow(t);
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}
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}
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/**
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* Runs a runnable and rethrows any exception as a {@link RuntimeException}.
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* @param pRunnable The runnable to run
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* @param <T> the type of checked exception the runnable may throw
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*/
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public static <T extends Throwable> void run(FailableRunnable<T> pRunnable) {
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try {
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pRunnable.run();
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} catch (Throwable t) {
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throw rethrow(t);
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}
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}
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/**
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* Calls a callable and rethrows any exception as a {@link RuntimeException}.
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* @param pCallable the callable to call
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* @param <O> the return type of the callable
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* @param <T> the type of checked exception the callable may throw
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* @return the value returned from the callable
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*/
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public static <O, T extends Throwable> O call(FailableCallable<O, T> pCallable) {
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try {
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return pCallable.call();
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} catch (Throwable t) {
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throw rethrow(t);
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}
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}
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/**
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* Calls a callable and rethrows any exception as a {@link RuntimeException}.
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* @param pCallable the callable to call
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* @param <O> the return type of the callable
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* @param <T> the type of checked exception the callable may throw
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* @return the value returned from the callable
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*/
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public static <O, T extends Throwable> O call(FailableCallable<O, T> pCallable) {
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try {
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return pCallable.call();
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} catch (Throwable t) {
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throw rethrow(t);
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}
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}
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/**
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* Consumes a consumer and rethrows any exception as a {@link RuntimeException}.
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* @param pConsumer the consumer to consume
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* @param pObject the object to consume by <code>pConsumer</code>
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* @param <O> the type the consumer accepts
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* @param <T> the type of checked exception the consumer may throw
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*/
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public static <O, T extends Throwable> void accept(FailableConsumer<O, T> pConsumer, O pObject) {
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try {
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pConsumer.accept(pObject);
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} catch (Throwable t) {
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throw rethrow(t);
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}
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}
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/**
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* Consumes a consumer and rethrows any exception as a {@link RuntimeException}.
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* @param pConsumer the consumer to consume
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* @param pObject the object to consume by <code>pConsumer</code>
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* @param <O> the type the consumer accepts
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* @param <T> the type of checked exception the consumer may throw
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*/
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public static <O, T extends Throwable> void accept(FailableConsumer<O, T> pConsumer, O pObject) {
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try {
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pConsumer.accept(pObject);
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} catch (Throwable t) {
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throw rethrow(t);
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}
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}
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/**
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* Consumes a consumer and rethrows any exception as a {@link RuntimeException}.
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* @param pConsumer the consumer to consume
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* @param pObject1 the first object to consume by <code>pConsumer</code>
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* @param pObject2 the second object to consume by <code>pConsumer</code>
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* @param <O1> the type of the first argument the consumer accepts
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* @param <O2> the type of the second argument the consumer accepts
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* @param <T> the type of checked exception the consumer may throw
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*/
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public static <O1, O2, T extends Throwable> void accept(FailableBiConsumer<O1, O2, T> pConsumer, O1 pObject1, O2 pObject2) {
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try {
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pConsumer.accept(pObject1, pObject2);
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} catch (Throwable t) {
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throw rethrow(t);
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}
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}
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/**
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* Consumes a consumer and rethrows any exception as a {@link RuntimeException}.
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* @param pConsumer the consumer to consume
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* @param pObject1 the first object to consume by <code>pConsumer</code>
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* @param pObject2 the second object to consume by <code>pConsumer</code>
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* @param <O1> the type of the first argument the consumer accepts
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* @param <O2> the type of the second argument the consumer accepts
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* @param <T> the type of checked exception the consumer may throw
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*/
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public static <O1, O2, T extends Throwable> void accept(FailableBiConsumer<O1, O2, T> pConsumer, O1 pObject1, O2 pObject2) {
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try {
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pConsumer.accept(pObject1, pObject2);
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} catch (Throwable t) {
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throw rethrow(t);
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}
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}
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/**
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* Applies a function and rethrows any exception as a {@link RuntimeException}.
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* @param pFunction the function to apply
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* @param pInput the input to apply <code>pFunction</code> on
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* @param <I> the type of the argument the function accepts
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* @param <O> the return type of the function
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* @param <T> the type of checked exception the function may throw
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* @return the value returned from the function
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*/
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public static <I, O, T extends Throwable> O apply(FailableFunction<I, O, T> pFunction, I pInput) {
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try {
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return pFunction.apply(pInput);
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} catch (Throwable t) {
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throw rethrow(t);
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}
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}
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/**
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* Applies a function and rethrows any exception as a {@link RuntimeException}.
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* @param pFunction the function to apply
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* @param pInput the input to apply <code>pFunction</code> on
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* @param <I> the type of the argument the function accepts
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* @param <O> the return type of the function
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* @param <T> the type of checked exception the function may throw
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* @return the value returned from the function
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*/
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public static <I, O, T extends Throwable> O apply(FailableFunction<I, O, T> pFunction, I pInput) {
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try {
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return pFunction.apply(pInput);
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} catch (Throwable t) {
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throw rethrow(t);
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}
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}
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/**
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* Applies a function and rethrows any exception as a {@link RuntimeException}.
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* @param pFunction the function to apply
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* @param pInput1 the first input to apply <code>pFunction</code> on
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* @param pInput2 the second input to apply <code>pFunction</code> on
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* @param <I1> the type of the first argument the function accepts
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* @param <I2> the type of the second argument the function accepts
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* @param <O> the return type of the function
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* @param <T> the type of checked exception the function may throw
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* @return the value returned from the function
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*/
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public static <I1, I2, O, T extends Throwable> O apply(FailableBiFunction<I1, I2, O, T> pFunction, I1 pInput1, I2 pInput2) {
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try {
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return pFunction.apply(pInput1, pInput2);
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} catch (Throwable t) {
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throw rethrow(t);
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}
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}
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/**
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* Applies a function and rethrows any exception as a {@link RuntimeException}.
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* @param pFunction the function to apply
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* @param pInput1 the first input to apply <code>pFunction</code> on
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* @param pInput2 the second input to apply <code>pFunction</code> on
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* @param <I1> the type of the first argument the function accepts
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* @param <I2> the type of the second argument the function accepts
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* @param <O> the return type of the function
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* @param <T> the type of checked exception the function may throw
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* @return the value returned from the function
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*/
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public static <I1, I2, O, T extends Throwable> O apply(FailableBiFunction<I1, I2, O, T> pFunction, I1 pInput1, I2 pInput2) {
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try {
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return pFunction.apply(pInput1, pInput2);
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} catch (Throwable t) {
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throw rethrow(t);
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}
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}
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/**
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* Tests a predicate and rethrows any exception as a {@link RuntimeException}.
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* @param pPredicate the predicate to test
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* @param pObject the input to test by <code>pPredicate</code>
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* @param <O> the type of argument the predicate tests
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* @param <T> the type of checked exception the predicate may throw
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* @return the boolean value returned by the predicate
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*/
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public static <O, T extends Throwable> boolean test(FailablePredicate<O, T> pPredicate, O pObject) {
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try {
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return pPredicate.test(pObject);
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} catch (Throwable t) {
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throw rethrow(t);
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}
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}
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/**
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* Tests a predicate and rethrows any exception as a {@link RuntimeException}.
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* @param pPredicate the predicate to test
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* @param pObject the input to test by <code>pPredicate</code>
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* @param <O> the type of argument the predicate tests
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* @param <T> the type of checked exception the predicate may throw
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* @return the boolean value returned by the predicate
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*/
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public static <O, T extends Throwable> boolean test(FailablePredicate<O, T> pPredicate, O pObject) {
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try {
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return pPredicate.test(pObject);
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} catch (Throwable t) {
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throw rethrow(t);
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}
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}
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/**
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* Tests a predicate and rethrows any exception as a {@link RuntimeException}.
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* @param pPredicate the predicate to test
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* @param pObject1 the first input to test by <code>pPredicate</code>
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* @param pObject2 the second input to test by <code>pPredicate</code>
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* @param <O1> the type of the first argument the predicate tests
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* @param <O2> the type of the second argument the predicate tests
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* @param <T> the type of checked exception the predicate may throw
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* @return the boolean value returned by the predicate
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*/
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public static <O1, O2, T extends Throwable> boolean test(FailableBiPredicate<O1, O2, T> pPredicate, O1 pObject1, O2 pObject2) {
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try {
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return pPredicate.test(pObject1, pObject2);
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} catch (Throwable t) {
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throw rethrow(t);
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}
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}
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/**
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* Tests a predicate and rethrows any exception as a {@link RuntimeException}.
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* @param pPredicate the predicate to test
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* @param pObject1 the first input to test by <code>pPredicate</code>
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* @param pObject2 the second input to test by <code>pPredicate</code>
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* @param <O1> the type of the first argument the predicate tests
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* @param <O2> the type of the second argument the predicate tests
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* @param <T> the type of checked exception the predicate may throw
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* @return the boolean value returned by the predicate
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*/
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public static <O1, O2, T extends Throwable> boolean test(FailableBiPredicate<O1, O2, T> pPredicate, O1 pObject1, O2 pObject2) {
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try {
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return pPredicate.test(pObject1, pObject2);
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} catch (Throwable t) {
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throw rethrow(t);
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}
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}
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/**
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* A simple try-with-resources implementation, that can be used, if your
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* objects do not implement the {@link AutoCloseable} interface. The method
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* executes the {@code pAction}. The method guarantees, that <em>all</em>
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* the {@code pResources} are being executed, in the given order, afterwards,
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* and regardless of success, or failure. If either the original action, or
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* any of the resource action fails, then the <em>first</em> failure (aka
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* {@link Throwable} is rethrown. Example use:
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* <pre>
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* final FileInputStream fis = new FileInputStream("my.file");
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* Functions.tryWithResources(useInputStream(fis), null, () -> fis.close());
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* </pre>
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* @param pAction The action to execute. This object <em>will</em> always
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* be invoked.
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* @param pErrorHandler An optional error handler, which will be invoked finally,
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* if any error occurred. The error handler will receive the first
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* error, aka {@link Throwable}.
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* @param pResources The resource actions to execute. <em>All</em> resource
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* actions will be invoked, in the given order. A resource action is an
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* instance of {@link FailableRunnable}, which will be executed.
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* @see #tryWithResources(FailableRunnable, FailableRunnable...)
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*/
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@SafeVarargs
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public static void tryWithResources(FailableRunnable<? extends Throwable> pAction,
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FailableConsumer<Throwable, ? extends Throwable> pErrorHandler,
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FailableRunnable<? extends Throwable>... pResources) {
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final FailableConsumer<Throwable, ? extends Throwable> errorHandler;
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if (pErrorHandler == null) {
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errorHandler = (t) -> rethrow(t);
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} else {
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errorHandler = pErrorHandler;
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}
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if (pResources != null) {
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for (FailableRunnable<? extends Throwable> runnable : pResources) {
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if (runnable == null) {
|
||||
throw new NullPointerException("A resource action must not be null.");
|
||||
}
|
||||
}
|
||||
}
|
||||
Throwable th = null;
|
||||
try {
|
||||
pAction.run();
|
||||
} catch (Throwable t) {
|
||||
th = t;
|
||||
}
|
||||
if (pResources != null) {
|
||||
for (FailableRunnable<? extends Object> runnable : pResources) {
|
||||
try {
|
||||
runnable.run();
|
||||
} catch (Throwable t) {
|
||||
if (th == null) {
|
||||
th = t;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
if (th != null) {
|
||||
try {
|
||||
errorHandler.accept(th);
|
||||
} catch (Throwable t) {
|
||||
throw rethrow(t);
|
||||
}
|
||||
}
|
||||
}
|
||||
/**
|
||||
* A simple try-with-resources implementation, that can be used, if your
|
||||
* objects do not implement the {@link AutoCloseable} interface. The method
|
||||
* executes the {@code pAction}. The method guarantees, that <em>all</em>
|
||||
* the {@code pResources} are being executed, in the given order, afterwards,
|
||||
* and regardless of success, or failure. If either the original action, or
|
||||
* any of the resource action fails, then the <em>first</em> failure (aka
|
||||
* {@link Throwable} is rethrown. Example use:
|
||||
* <pre>
|
||||
* final FileInputStream fis = new FileInputStream("my.file");
|
||||
* Functions.tryWithResources(useInputStream(fis), null, () -> fis.close());
|
||||
* </pre>
|
||||
* @param pAction The action to execute. This object <em>will</em> always
|
||||
* be invoked.
|
||||
* @param pErrorHandler An optional error handler, which will be invoked finally,
|
||||
* if any error occurred. The error handler will receive the first
|
||||
* error, aka {@link Throwable}.
|
||||
* @param pResources The resource actions to execute. <em>All</em> resource
|
||||
* actions will be invoked, in the given order. A resource action is an
|
||||
* instance of {@link FailableRunnable}, which will be executed.
|
||||
* @see #tryWithResources(FailableRunnable, FailableRunnable...)
|
||||
*/
|
||||
@SafeVarargs
|
||||
public static void tryWithResources(FailableRunnable<? extends Throwable> pAction,
|
||||
FailableConsumer<Throwable, ? extends Throwable> pErrorHandler,
|
||||
FailableRunnable<? extends Throwable>... pResources) {
|
||||
final FailableConsumer<Throwable, ? extends Throwable> errorHandler;
|
||||
if (pErrorHandler == null) {
|
||||
errorHandler = (t) -> rethrow(t);
|
||||
} else {
|
||||
errorHandler = pErrorHandler;
|
||||
}
|
||||
if (pResources != null) {
|
||||
for (FailableRunnable<? extends Throwable> runnable : pResources) {
|
||||
if (runnable == null) {
|
||||
throw new NullPointerException("A resource action must not be null.");
|
||||
}
|
||||
}
|
||||
}
|
||||
Throwable th = null;
|
||||
try {
|
||||
pAction.run();
|
||||
} catch (Throwable t) {
|
||||
th = t;
|
||||
}
|
||||
if (pResources != null) {
|
||||
for (FailableRunnable<? extends Object> runnable : pResources) {
|
||||
try {
|
||||
runnable.run();
|
||||
} catch (Throwable t) {
|
||||
if (th == null) {
|
||||
th = t;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
if (th != null) {
|
||||
try {
|
||||
errorHandler.accept(th);
|
||||
} catch (Throwable t) {
|
||||
throw rethrow(t);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* A simple try-with-resources implementation, that can be used, if your
|
||||
* objects do not implement the {@link AutoCloseable} interface. The method
|
||||
* executes the {@code pAction}. The method guarantees, that <em>all</em>
|
||||
* the {@code pResources} are being executed, in the given order, afterwards,
|
||||
* and regardless of success, or failure. If either the original action, or
|
||||
* any of the resource action fails, then the <em>first</em> failure (aka
|
||||
* {@link Throwable} is rethrown. Example use:
|
||||
* <pre>
|
||||
* final FileInputStream fis = new FileInputStream("my.file");
|
||||
* Functions.tryWithResources(useInputStream(fis), () -> fis.close());
|
||||
* </pre>
|
||||
* @param pAction The action to execute. This object <em>will</em> always
|
||||
* be invoked.
|
||||
* @param pResources The resource actions to execute. <em>All</em> resource
|
||||
* actions will be invoked, in the given order. A resource action is an
|
||||
* instance of {@link FailableRunnable}, which will be executed.
|
||||
* @see #tryWithResources(FailableRunnable, FailableConsumer, FailableRunnable...)
|
||||
*/
|
||||
@SafeVarargs
|
||||
public static void tryWithResources(FailableRunnable<? extends Throwable> pAction,
|
||||
FailableRunnable<? extends Throwable>... pResources) {
|
||||
tryWithResources(pAction, null, pResources);
|
||||
}
|
||||
/**
|
||||
* A simple try-with-resources implementation, that can be used, if your
|
||||
* objects do not implement the {@link AutoCloseable} interface. The method
|
||||
* executes the {@code pAction}. The method guarantees, that <em>all</em>
|
||||
* the {@code pResources} are being executed, in the given order, afterwards,
|
||||
* and regardless of success, or failure. If either the original action, or
|
||||
* any of the resource action fails, then the <em>first</em> failure (aka
|
||||
* {@link Throwable} is rethrown. Example use:
|
||||
* <pre>
|
||||
* final FileInputStream fis = new FileInputStream("my.file");
|
||||
* Functions.tryWithResources(useInputStream(fis), () -> fis.close());
|
||||
* </pre>
|
||||
* @param pAction The action to execute. This object <em>will</em> always
|
||||
* be invoked.
|
||||
* @param pResources The resource actions to execute. <em>All</em> resource
|
||||
* actions will be invoked, in the given order. A resource action is an
|
||||
* instance of {@link FailableRunnable}, which will be executed.
|
||||
* @see #tryWithResources(FailableRunnable, FailableConsumer, FailableRunnable...)
|
||||
*/
|
||||
@SafeVarargs
|
||||
public static void tryWithResources(FailableRunnable<? extends Throwable> pAction,
|
||||
FailableRunnable<? extends Throwable>... pResources) {
|
||||
tryWithResources(pAction, null, pResources);
|
||||
}
|
||||
|
||||
/**
|
||||
* Rethrow a {@link Throwable} as an unchecked exception.
|
||||
* @param pThrowable The throwable to rethrow
|
||||
* @return Never returns anything, this method never terminates normally
|
||||
*/
|
||||
public static RuntimeException rethrow(Throwable pThrowable) {
|
||||
if (pThrowable == null) {
|
||||
throw new NullPointerException("The Throwable must not be null.");
|
||||
} else {
|
||||
if (pThrowable instanceof RuntimeException) {
|
||||
throw (RuntimeException) pThrowable;
|
||||
} else if (pThrowable instanceof Error) {
|
||||
throw (Error) pThrowable;
|
||||
} else if (pThrowable instanceof IOException) {
|
||||
throw new UncheckedIOException((IOException) pThrowable);
|
||||
} else {
|
||||
throw new UndeclaredThrowableException(pThrowable);
|
||||
}
|
||||
}
|
||||
}
|
||||
/**
|
||||
* Rethrow a {@link Throwable} as an unchecked exception.
|
||||
* @param pThrowable The throwable to rethrow
|
||||
* @return Never returns anything, this method never terminates normally
|
||||
*/
|
||||
public static RuntimeException rethrow(Throwable pThrowable) {
|
||||
if (pThrowable == null) {
|
||||
throw new NullPointerException("The Throwable must not be null.");
|
||||
} else {
|
||||
if (pThrowable instanceof RuntimeException) {
|
||||
throw (RuntimeException) pThrowable;
|
||||
} else if (pThrowable instanceof Error) {
|
||||
throw (Error) pThrowable;
|
||||
} else if (pThrowable instanceof IOException) {
|
||||
throw new UncheckedIOException((IOException) pThrowable);
|
||||
} else {
|
||||
throw new UndeclaredThrowableException(pThrowable);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue