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https://issues.apache.org/jira/browse/DIRMINA-664?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12677357#action_12677357
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Emmanuel Lecharny commented on DIRMINA-664:
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You are damn right.
Let's remove those faked immutable objects.
> EMPTY_* IoBuffer constants can be made mutable and cause data errors
> --------------------------------------------------------------------
>
> Key: DIRMINA-664
> URL: https://issues.apache.org/jira/browse/DIRMINA-664
> Project: MINA
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.0.0-M4
> Environment: All?
> Reporter: David Rosenstrauch
> Priority: Minor
>
> The EMPTY_* constants in the IoBuffer class can be made mutable (by using the
> setAutoExpand(true) method call) which can result in those constant buffers
> no longer being empty. This can obviously cause a multitude of data errors.
> See this JUnit test case for an example:
> import junit.framework.TestCase;
> import org.apache.mina.core.buffer.IoBuffer;
> public class TestIoBuffer extends TestCase {
> public void testIoBufferAllocate() {
> IoBuffer buf = IoBuffer.allocate(0).setAutoExpand(true);
> buf.putInt(1234);
> buf.flip();
> buf = IoBuffer.allocate(0);
> assertEquals(0, buf.remaining());
> }
> public void testEmptyIoBuffer() {
> IoBuffer buf = IoBuffer.EMPTY_BUFFER.setAutoExpand(true);
> buf.putInt(1234);
> buf.flip();
> buf = IoBuffer.EMPTY_BUFFER;
> assertEquals(0, buf.remaining());
> }
> }
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