org.apache.camel.util.function.ThrowingHelper Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of camel-util Show documentation
The Camel Utilities
The newest version!
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */
package org.apache.camel.util.function;

import java.util.Optional;
import java.util.function.BiConsumer;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.function.Supplier;

import org.apache.camel.util.ObjectHelper;

public final class ThrowingHelper {
    private ThrowingHelper() {
    }

    /**
     * Wrap a {@link ThrowingSupplier} to a standard {@link Suppliers} by throwing a {@link RuntimeException} in case of
     * an exception is thrown by the delegated supplier.
     */
    public static  Supplier wrapAsSupplier(ThrowingSupplier supplier) {
        return new Supplier<>() {
            @Override
            public V get() {
                try {
                    return supplier.get();
                } catch (Throwable t) {
                    throw new RuntimeException(t);
                }
            }
        };
    }

    /**
     * Wrap a {@link ThrowingConsumer} to a standard {@link Consumer} by throwing a {@link RuntimeException} in case of
     * an exception is thrown by the delegated consumer.
     */
    public static  Consumer wrapAsConsumer(ThrowingConsumer consumer) {
        return new Consumer<>() {
            @Override
            public void accept(I in) {
                try {
                    consumer.accept(in);
                } catch (Throwable t) {
                    throw new RuntimeException(t);
                }
            }
        };
    }

    /**
     * Wrap a {@link ThrowingBiConsumer} to a standard {@link BiConsumer} by throwing a {@link RuntimeException} in case
     * of an exception is thrown by the delegated consumer.
     */
    public static  BiConsumer wrapAsBiConsumer(ThrowingBiConsumer consumer) {
        return new BiConsumer<>() {
            @Override
            public void accept(I1 i1, I2 i2) {
                try {
                    consumer.accept(i1, i2);
                } catch (Throwable t) {
                    throw new RuntimeException(t);
                }
            }
        };
    }

    /**
     * Wrap a {@link ThrowingFunction} to a standard {@link Function} by throwing a {@link RuntimeException} in case of
     * an exception is thrown by the delegated function.
     */
    public static  Function wrapAsFunction(ThrowingFunction function) {
        return new Function<>() {
            @Override
            public R apply(I in) {
                try {
                    return function.apply(in);

                } catch (Throwable t) {
                    throw new RuntimeException(t);
                }
            }
        };
    }

    /**
     * Tests whether the value is not null, an empty string, an empty collection or a map and transform
     * it using the given function.
     *
     * @param value    the value, if its a String it will be tested for text length as well
     * @param function the function to be executed against value if not empty
     */
    public static  Optional applyIfNotEmpty(I value, ThrowingFunction function)
            throws T {
        if (ObjectHelper.isNotEmpty(value)) {
            return Optional.ofNullable(function.apply(value));
        }

        return Optional.empty();
    }

    /**
     * Tests whether the value is not null, an empty string, an empty collection or a map and transform
     * it using the given function.
     *
     * @param value    the value, if its a String it will be tested for text length as well
     * @param consumer the function to be executed against value if not empty
     * @param orElse   the supplier to use to retrieve a result if the given value is empty
     */
    public static  R applyIfNotEmpty(I value, ThrowingFunction consumer, Supplier orElse)
            throws T {
        if (ObjectHelper.isNotEmpty(value)) {
            return consumer.apply(value);
        }

        return orElse.get();
    }
}