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Exception from COMBindingBaseObject swallows real reason + HRESULT
The exception thrown from COMBindingBaseObject when instatiation fails
is misleading:
COM object with CLSID {0002DF01-0000-0000-C000-000000000046} not registered properly!
In the concrete case COM was not properly initialized, the same error now
reports (in german locale):
CoInitialize wurde nicht aufgerufen.(HRESULT: 800401f0) (puArgErr=)
For english locale this should be along the lines of:
CoInitialize was not called.(HRESULT: 800401f0) (puArgErr=)
The message now points out the correct problem (as far as the windows
error code translation works) and the HRESULT can be used for a locale
independend report + search.
Closes java-native-access#646- Loading branch information
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54 changes: 54 additions & 0 deletions
54
...b/platform/test/com/sun/jna/platform/win32/COM/ComExceptionWithoutInitializationTest.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| package com.sun.jna.platform.win32.COM; | ||
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| import com.sun.jna.platform.win32.Guid; | ||
| import static org.junit.Assert.assertNotNull; | ||
| import static org.junit.Assert.assertTrue; | ||
| import org.junit.Test; | ||
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| public class ComExceptionWithoutInitializationTest { | ||
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| @Test | ||
| public void testCorrectExceptionOnFailedInitialization() { | ||
| String message = null; | ||
| try { | ||
| InternetExplorer ie = new InternetExplorer(); | ||
| } catch (COMException ex) { | ||
| message = ex.getMessage(); | ||
| } | ||
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| // This invocation must raise an exception, as the COM thread is not | ||
| // initialized, in the message it is expected, that the HRESULT is reported | ||
| // and the HRESULT resulting from calling into COM with it being initialized | ||
| // is 800401f0. The message is also expected to point the to correct | ||
| // initialization via CoInitialize | ||
| assertNotNull(message); | ||
| assertTrue(message.contains("HRESULT")); | ||
| assertTrue(message.contains("800401f0")); | ||
| assertTrue(message.contains("CoInitialize")); | ||
| } | ||
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| /** | ||
| * InternetExplorer / IWebBrowser2 - see | ||
| * http://msdn.microsoft.com/en-us/library/aa752127(v=vs.85).aspx | ||
| */ | ||
| private static class InternetExplorer extends COMLateBindingObject { | ||
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| public InternetExplorer(IDispatch iDispatch) { | ||
| super(iDispatch); | ||
| } | ||
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| public InternetExplorer() { | ||
| super(new Guid.CLSID("{0002DF01-0000-0000-C000-000000000046}"), true); | ||
| } | ||
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| /** | ||
| * IWebBrowser2::get_LocationURL<br> | ||
| * Read-only COM property.<br> | ||
| * | ||
| * @return the URL of the resource that is currently displayed. | ||
| */ | ||
| public String getURL() { | ||
| return getStringProperty("LocationURL"); | ||
| } | ||
| } | ||
| } |