UncheckedThrow.java

/*
 * JBoss, Home of Professional Open Source
 * Copyright 2010 Red Hat Inc. and/or its affiliates and other contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * 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.
 */
package org.jboss.arquillian.core.impl;

public final class UncheckedThrow {
    private UncheckedThrow() {
    }

    public static void throwUnchecked(final Throwable ex) {
        // Now we use the 'generic' method. Normally the type T is inferred
        // from the parameters. However you can specify the type also explicit!
        // Now we do just that! We use the RuntimeException as type!
        // That means the throwsUnchecked throws an unchecked exception!
        // Since the types are erased, no type-information is there to prevent this!
        UncheckedThrow.<RuntimeException>throwsUnchecked(ex);
    }

    /**
     * Generics are erased in Java. The real Type of T is lost during the compilation
     */
    @SuppressWarnings("unchecked")
    private static <T extends Throwable> void throwsUnchecked(Throwable toThrow) throws T {
        // Since the type is erased, this cast actually does nothing!!!
        // we can throw any exception
        throw (T) toThrow;
    }
}