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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0; border-collapse: collapse; padding: 0 0 10px"> <p style="margin: 10px 0 0; margin-top: 0">Hi @Gunnar Morling, sure. </p> <p style="margin: 10px 0 0">Actually, the example from @Marco Janc in this issue would work as well, but let me give another example:</p>
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<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
<span class="code-keyword" style="color: #000091">class </span>Foo {
@NotNull Bar bar;
@AssertTrue
<span class="code-object" style="color: #910091">boolean</span> hasValidBar() {
<span class="code-keyword" style="color: #000091">return</span> bar.value.equals(42);
}
}
<span class="code-keyword" style="color: #000091">class </span>Bar {
<span class="code-object" style="color: #910091">Integer</span> value;
}
</pre>
</div>
</div> <p style="margin: 10px 0 0">If we inspect the following Foo instance (shown as json):</p>
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<pre class="code-json" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
{
<span class="code-quote" style="color: #009100">"bar"</span> : {
<span class="code-quote" style="color: #009100">"value"</span>: 43
}
}
</pre>
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</div> <p style="margin: 10px 0 0">Then the @AssertTrue validation will fail because the value in bar is not 42. However, if we pass the following instance:</p>
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<pre class="code-json" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
{
<span class="code-quote" style="color: #009100">"bar"</span> : <span class="code-keyword" style="color: #000091">null</span>
}
</pre>
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</div> <p style="margin: 10px 0 0">then it would be nice if the validator returns that the @NotNull constraint was violated. Instead, a ValidationException is thrown because the @AssertTrue validation resulted in a NullPointerException. </p> <p style="margin: 10px 0 0">My suggestion is to swallow those exceptions if there are other constraint violations. In this case that would mean that the framework would return that a single constraint was violated. </p> <p style="margin: 10px 0 0">Only in case when there are NO constraint violations but one or more constraint validations yield a ValidationException does the framework throw out the ValidationException. Here's an example of that:</p>
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<pre class="code-json" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
{
<span class="code-quote" style="color: #009100">"bar"</span> : {
<span class="code-quote" style="color: #009100">"value"</span>: <span class="code-keyword" style="color: #000091">null</span>
}
}
</pre>
</div>
</div> <p style="margin: 10px 0 0">In this case the @AssertTrue validation will also result in a ValidationException but there are no other constraint violations. In that case the framework should not swallow the ValidationException but throw it in the same way as it does currently.</p> <p style="margin: 10px 0 0">This solution works no matter the validation order and "fail-fast" is not required. If you check the ValidatorImpl I've attached you can see I made 2 small changes in methods validateConstraintsForSingleDefaultGroupElement(...) and validateMetaConstraints(...). While looping over the constraints any ValidationException is caught. The ValidationException is only thrown if there are no other violations.</p> <p style="margin: 10px 0 0">Hope this clarified things. I've tested my solution in a large project containing hundreds of annotated beans and it seems to do the trick. Let me know what you think.</p> </td>
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