META-INF.modules.java.base.classes.java.lang.reflect.UndeclaredThrowableException Maven / Gradle / Ivy
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/*
* Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package java.lang.reflect;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.ObjectStreamField;
import jdk.internal.access.SharedSecrets;
/**
* Thrown by a method invocation on a proxy instance if its invocation
* handler's {@link InvocationHandler#invoke invoke} method throws a
* checked exception (a {@code Throwable} that is not assignable
* to {@code RuntimeException} or {@code Error}) that
* is not assignable to any of the exception types declared in the
* {@code throws} clause of the method that was invoked on the
* proxy instance and dispatched to the invocation handler.
*
* An {@code UndeclaredThrowableException} instance contains
* the undeclared checked exception that was thrown by the invocation
* handler, and it can be retrieved with the
* {@code getUndeclaredThrowable()} method.
* {@code UndeclaredThrowableException} extends
* {@code RuntimeException}, so it is an unchecked exception
* that wraps a checked exception.
*
*
As of release 1.4, this exception has been retrofitted to
* conform to the general purpose exception-chaining mechanism. The
* "undeclared checked exception that was thrown by the invocation
* handler" that may be provided at construction time and accessed via
* the {@link #getUndeclaredThrowable()} method is now known as the
* cause, and may be accessed via the {@link
* Throwable#getCause()} method, as well as the aforementioned "legacy
* method."
*
* @author Peter Jones
* @see InvocationHandler
* @since 1.3
*/
public class UndeclaredThrowableException extends RuntimeException {
static final long serialVersionUID = 330127114055056639L;
/**
* Constructs an {@code UndeclaredThrowableException} with the
* specified {@code Throwable}.
*
* @param undeclaredThrowable the undeclared checked exception
* that was thrown
*/
public UndeclaredThrowableException(Throwable undeclaredThrowable) {
super(null, undeclaredThrowable); // Disallow initCause
}
/**
* Constructs an {@code UndeclaredThrowableException} with the
* specified {@code Throwable} and a detail message.
*
* @param undeclaredThrowable the undeclared checked exception
* that was thrown
* @param s the detail message
*/
public UndeclaredThrowableException(Throwable undeclaredThrowable,
String s)
{
super(s, undeclaredThrowable); // Disallow initCause
}
/**
* Returns the {@code Throwable} instance wrapped in this
* {@code UndeclaredThrowableException}, which may be {@code null}.
*
*
This method predates the general-purpose exception chaining facility.
* The {@link Throwable#getCause()} method is now the preferred means of
* obtaining this information.
*
* @return the undeclared checked exception that was thrown
*/
public Throwable getUndeclaredThrowable() {
return super.getCause();
}
/**
* Serializable fields for UndeclaredThrowableException.
*
* @serialField undeclaredThrowable Throwable
*/
private static final ObjectStreamField[] serialPersistentFields = {
new ObjectStreamField("undeclaredThrowable", Throwable.class)
};
/*
* Reconstitutes the UndeclaredThrowableException instance from a stream
* and initialize the cause properly when deserializing from an older
* version.
*/
private void readObject(ObjectInputStream s) throws IOException, ClassNotFoundException {
ObjectInputStream.GetField fields = s.readFields();
Throwable exception = (Throwable) fields.get("undeclaredThrowable", null);
if (exception != null) {
SharedSecrets.getJavaLangAccess().setCause(this, exception);
}
}
/*
* To maintain compatibility with older implementation, write a serial
* "ex" field with the cause as the value.
*/
private void writeObject(ObjectOutputStream out) throws IOException {
ObjectOutputStream.PutField fields = out.putFields();
fields.put("undeclaredThrowable", super.getCause());
out.writeFields();
}
}