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/*
* Copyright 2006-2010 Amazon Technologies, Inc. or its affiliates.
* Amazon, Amazon.com and Carbonado are trademarks or registered trademarks
* of Amazon Technologies, Inc. or its affiliates. All rights reserved.
*
* 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 com.amazon.carbonado.util;
/**
* Allows exceptions to be thrown which aren't declared to be thrown. Use of
* this technique can cause confusion since it violates the Java language rules
* for undeclared checked exceptions. For this reason, this class should not be
* used except under special circumstances such as to work around compiler
* bugs. An exception can be made, if calling any of the fireDeclared methods
* and the set of declared types matches what the caller is allowed to throw.
*
* <p>Example:
*
* <pre>
* public <E extends Throwable> void someMethod(E exception) throws E {
* ...
*
* // Apparent compiler bug sometimes disallows this. Doesn't appear to
* // show up when compiling source files individually.
*
* //throw exception;
*
* // Throw it this way instead, and compiler doesn't know.
* ThrowUnchecked.fire(exception);
* }
* </pre>
*
* @author Brian S O'Neill
* @deprecated use {@link org.cojen.util.ThrowUnchecked} instead
*/
public abstract class ThrowUnchecked {
private static volatile ThrowUnchecked cImpl;
/**
* Throws the given exception, even though it may be checked. This method
* only returns normally if the exception is null.
*
* @param t exception to throw
*/
public static void fire(Throwable t) {
org.cojen.util.ThrowUnchecked.fire(t);
}
/**
* Throws the given exception if it is unchecked or an instance of any of
* the given declared types. Otherwise, it is thrown as an
* UndeclaredThrowableException. This method only returns normally if the
* exception is null.
*
* @param t exception to throw
* @param declaredTypes if exception is checked and is not an instance of
* any of these types, then it is thrown as an
* UndeclaredThrowableException.
*/
public static void fireDeclared(Throwable t, Class... declaredTypes) {
org.cojen.util.ThrowUnchecked.fireDeclared(t, declaredTypes);
}
/**
* Throws the either the original exception or the first found cause if it
* matches one of the given declared types or is unchecked. Otherwise, the
* original exception is thrown as an UndeclaredThrowableException. This
* method only returns normally if the exception is null.
*
* @param t exception whose cause is to be thrown
* @param declaredTypes if exception is checked and is not an instance of
* any of these types, then it is thrown as an
* UndeclaredThrowableException.
*/
public static void fireFirstDeclared(Throwable t, Class... declaredTypes) {
org.cojen.util.ThrowUnchecked.fireFirstDeclared(t, declaredTypes);
}
/**
* Throws the cause of the given exception, even though it may be
* checked. If the cause is null, then the original exception is
* thrown. This method only returns normally if the exception is null.
*
* @param t exception whose cause is to be thrown
*/
public static void fireCause(Throwable t) {
org.cojen.util.ThrowUnchecked.fireCause(t);
}
/**
* Throws the cause of the given exception if it is unchecked or an
* instance of any of the given declared types. Otherwise, it is thrown as
* an UndeclaredThrowableException. If the cause is null, then the original
* exception is thrown. This method only returns normally if the exception
* is null.
*
* @param t exception whose cause is to be thrown
* @param declaredTypes if exception is checked and is not an instance of
* any of these types, then it is thrown as an
* UndeclaredThrowableException.
*/
public static void fireDeclaredCause(Throwable t, Class... declaredTypes) {
org.cojen.util.ThrowUnchecked.fireDeclaredCause(t, declaredTypes);
}
/**
* Throws the first found cause that matches one of the given declared
* types or is unchecked. Otherwise, the immediate cause is thrown as an
* UndeclaredThrowableException. If the immediate cause is null, then the
* original exception is thrown. This method only returns normally if the
* exception is null.
*
* @param t exception whose cause is to be thrown
* @param declaredTypes if exception is checked and is not an instance of
* any of these types, then it is thrown as an
* UndeclaredThrowableException.
*/
public static void fireFirstDeclaredCause(Throwable t, Class... declaredTypes) {
org.cojen.util.ThrowUnchecked.fireFirstDeclaredCause(t, declaredTypes);
}
/**
* Throws the root cause of the given exception, even though it may be
* checked. If the root cause is null, then the original exception is
* thrown. This method only returns normally if the exception is null.
*
* @param t exception whose root cause is to be thrown
*/
public static void fireRootCause(Throwable t) {
org.cojen.util.ThrowUnchecked.fireRootCause(t);
}
/**
* Throws the root cause of the given exception if it is unchecked or an
* instance of any of the given declared types. Otherwise, it is thrown as
* an UndeclaredThrowableException. If the root cause is null, then the
* original exception is thrown. This method only returns normally if the
* exception is null.
*
* @param t exception whose root cause is to be thrown
* @param declaredTypes if exception is checked and is not an instance of
* any of these types, then it is thrown as an
* UndeclaredThrowableException.
*/
public static void fireDeclaredRootCause(Throwable t, Class... declaredTypes) {
org.cojen.util.ThrowUnchecked.fireDeclaredRootCause(t, declaredTypes);
}
protected ThrowUnchecked() {
}
protected abstract void doFire(Throwable t);
}
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