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A general programming library in Java/Android. It's easy to learn and simple to use with concise and powerful APIs.
package com.landawn.abacus.util;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.function.Predicate;
import java.util.function.Supplier;
/*
* Copyright (C) 2019 HaiYang Li
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License
* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing permissions and limitations under
* the License.
*/
public final class Try {
private static final AutoCloseable EMPTY = () -> {
// Do nothing.
};
private final T targetResource;
private final Throwables.Supplier targetResourceSupplier;
private final Runnable finalAction;
Try(final T targetResource, final Throwables.Supplier targetResourceSupplier, final Runnable finalAction) {
this.targetResource = targetResource;
this.targetResourceSupplier = targetResourceSupplier;
this.finalAction = finalAction;
}
/**
*
*
* @param
* @param targetResource
* @return
*/
public static Try with(final T targetResource) {
N.checkArgNotNull(targetResource, "targetResourceSupplier");//NOSONAR
return new Try<>(targetResource, null, null);
}
/**
*
*
* @param
* @param targetResource
* @param finalAction
* @return
*/
public static Try with(final T targetResource, final Runnable finalAction) {
N.checkArgNotNull(targetResource, "targetResourceSupplier");
N.checkArgNotNull(finalAction, "finalAction");
return new Try<>(targetResource, null, finalAction);
}
/**
*
*
* @param
* @param targetResourceSupplier
* @return
*/
public static Try with(final Throwables.Supplier targetResourceSupplier) {
N.checkArgNotNull(targetResourceSupplier, "targetResourceSupplier");
return new Try<>(null, targetResourceSupplier, null);
}
/**
*
*
* @param
* @param targetResourceSupplier
* @param finalAction
* @return
*/
public static Try with(final Throwables.Supplier targetResourceSupplier, final Runnable finalAction) {
N.checkArgNotNull(targetResourceSupplier, "targetResourceSupplier");
N.checkArgNotNull(finalAction, "finalAction");
return new Try<>(null, targetResourceSupplier, finalAction);
}
/**
*
*
* @param
* @param finalAction
* @return
*/
public static Try with(final Runnable finalAction) {
N.checkArgNotNull(finalAction);
return new Try<>(null, null, finalAction);
}
/**
*
* @param cmd
* @throws RuntimeException if some error happens
*/
public static void run(final Throwables.Runnable cmd) {
try {
cmd.run();
} catch (Exception e) {
throw ExceptionUtil.toRuntimeException(e);
}
}
/**
*
* @param cmd
* @param actionOnError
*/
public static void run(final Throwables.Runnable cmd, final Consumer actionOnError) {
try {
cmd.run();
} catch (Exception e) {
actionOnError.accept(e);
}
}
/**
*
* @param
* @param cmd
* @return
* @throws RuntimeException if some error happens
*/
public static R call(final java.util.concurrent.Callable cmd) {
try {
return cmd.call();
} catch (Exception e) {
throw ExceptionUtil.toRuntimeException(e);
}
}
/**
*
* @param
* @param cmd
* @param actionOnError
* @return
*/
public static R call(final java.util.concurrent.Callable cmd, final Function actionOnError) {
try {
return cmd.call();
} catch (Exception e) {
return actionOnError.apply(e);
}
}
/**
*
* @param
* @param cmd
* @param supplier
* @return
*/
public static R call(final java.util.concurrent.Callable cmd, final Supplier supplier) {
try {
return cmd.call();
} catch (Exception e) {
return supplier.get();
}
}
/**
*
* @param
* @param cmd
* @param defaultValue
* @return
*/
public static R call(final java.util.concurrent.Callable cmd, final R defaultValue) {
try {
return cmd.call();
} catch (Exception e) {
return defaultValue;
}
}
/**
*
* @param
* @param cmd
* @param predicate
* @param supplier
* @return
* @throws RuntimeException if some error happens and predicate return false.
*/
public static R call(final java.util.concurrent.Callable cmd, final Predicate predicate, final Supplier supplier) {
try {
return cmd.call();
} catch (Exception e) {
if (predicate.test(e)) {
return supplier.get();
} else {
throw ExceptionUtil.toRuntimeException(e);
}
}
}
/**
*
* @param
* @param cmd
* @param predicate
* @param defaultValue
* @return
* @throws RuntimeException if some error happens and predicate return false.
*/
public static R call(final java.util.concurrent.Callable cmd, final Predicate predicate, final R defaultValue) {
try {
return cmd.call();
} catch (Exception e) {
if (predicate.test(e)) {
return defaultValue;
} else {
throw ExceptionUtil.toRuntimeException(e);
}
}
}
// /**
// *
// * @return
// */
// public T val() {
// return t;
// }
/**
*
* @param cmd
*/
public void run(final Throwables.Consumer cmd) {
try (final AutoCloseable c = targetResource == null ? (targetResourceSupplier == null ? EMPTY : targetResourceSupplier.get()) : targetResource) {
cmd.accept(targetResource);
} catch (Exception e) {
throw ExceptionUtil.toRuntimeException(e);
} finally {
if (finalAction != null) {
finalAction.run();
}
}
}
/**
*
* @param cmd
* @param actionOnError
*/
public void run(final Throwables.Consumer cmd, final Consumer actionOnError) {
try (final AutoCloseable c = targetResource == null ? (targetResourceSupplier == null ? EMPTY : targetResourceSupplier.get()) : targetResource) {
cmd.accept(targetResource);
} catch (Exception e) {
actionOnError.accept(e);
} finally {
if (finalAction != null) {
finalAction.run();
}
}
}
/**
*
* @param
* @param cmd
* @return
*/
public R call(final Throwables.Function cmd) {
try (final AutoCloseable c = targetResource == null ? (targetResourceSupplier == null ? EMPTY : targetResourceSupplier.get()) : targetResource) {
return cmd.apply(targetResource);
} catch (Exception e) {
throw ExceptionUtil.toRuntimeException(e);
} finally {
if (finalAction != null) {
finalAction.run();
}
}
}
/**
*
* @param
* @param cmd
* @param actionOnError
* @return
*/
public R call(final Throwables.Function cmd, final Function actionOnError) {
try (final AutoCloseable c = targetResource == null ? (targetResourceSupplier == null ? EMPTY : targetResourceSupplier.get()) : targetResource) {
return cmd.apply(targetResource);
} catch (Exception e) {
return actionOnError.apply(e);
} finally {
if (finalAction != null) {
finalAction.run();
}
}
}
/**
*
* @param
* @param cmd
* @param supplier
* @return
*/
public R call(final Throwables.Function cmd, final Supplier supplier) {
try (final AutoCloseable c = targetResource == null ? (targetResourceSupplier == null ? EMPTY : targetResourceSupplier.get()) : targetResource) {
return cmd.apply(targetResource);
} catch (Exception e) {
return supplier.get();
} finally {
if (finalAction != null) {
finalAction.run();
}
}
}
/**
*
* @param
* @param cmd
* @param defaultValue
* @return
*/
public R call(final Throwables.Function cmd, final R defaultValue) {
try (final AutoCloseable c = targetResource == null ? (targetResourceSupplier == null ? EMPTY : targetResourceSupplier.get()) : targetResource) {
return cmd.apply(targetResource);
} catch (Exception e) {
return defaultValue;
} finally {
if (finalAction != null) {
finalAction.run();
}
}
}
/**
*
* @param
* @param cmd
* @param predicate
* @param supplier
* @return
*/
public R call(final Throwables.Function cmd, final Predicate predicate,
final Supplier supplier) {
try (final AutoCloseable c = targetResource == null ? (targetResourceSupplier == null ? EMPTY : targetResourceSupplier.get()) : targetResource) {
return cmd.apply(targetResource);
} catch (Exception e) {
if (predicate.test(e)) {
return supplier.get();
} else {
throw ExceptionUtil.toRuntimeException(e);
}
} finally {
if (finalAction != null) {
finalAction.run();
}
}
}
/**
*
* @param
* @param cmd
* @param predicate
* @param defaultValue
* @return
*/
public R call(final Throwables.Function cmd, final Predicate predicate, final R defaultValue) {
try (final AutoCloseable c = targetResource == null ? (targetResourceSupplier == null ? EMPTY : targetResourceSupplier.get()) : targetResource) {
return cmd.apply(targetResource);
} catch (Exception e) {
if (predicate.test(e)) {
return defaultValue;
} else {
throw ExceptionUtil.toRuntimeException(e);
}
} finally {
if (finalAction != null) {
finalAction.run();
}
}
}
}