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GeezerVison is showing github.com — scijava-common/src/main/java/org/scijava/Cancelable.java at main · scijava/scijava-common

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/*
* #%L
* SciJava Common shared library for SciJava software.
* %%
* Copyright (C) 2009 - 2026 SciJava developers.
* %%
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
* #L%
*/
package org.scijava;
/**
* An operation that can be canceled.
*
* @author Curtis Rueden
*/
public interface Cancelable {
/** Gets whether the operation has been canceled. */
boolean isCanceled();
/**
* Cancels the operation execution, with the given reason for doing so.
* <p>
* This method merely sets the operation status to canceled; it cannot
* necessarily stop the operation itself. That is, it is the responsibility of
* each individual operation to check {@link #isCanceled()} in a timely manner
* during execution, and stop doing whatever it is doing if the flag has been
* tripped.
* </p>
*
* @param reason A message describing why the operation is being canceled.
*/
void cancel(String reason);
/**
* Gets a message describing why the operation was canceled.
*
* @return The reason for cancelation, which may be null if no reason was
* given, or if the operation was not in fact canceled.
*/
String getCancelReason();
}
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