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    <p>Perhaps it happens because you are missing "set configuration", try specifying it explicitly and see if that solves it or a different error happens, e.g.</p> <pre><code>&lt;field custom-converter="com.OnOffEnumToBooleanConverter"&gt; &lt;a&gt;field1&lt;/a&gt; &lt;b get-method="isField2" set-method="field2"&gt;subParent.field2&lt;/b&gt; &lt;/field&gt; </code></pre> <p>UPDATE:</p> <p>I had to properly format your java code to be able to read...here is the problem you have "if and else" for a boolean value...there is no 3rd condition...just carefully look at it:</p> <pre><code>if (src instanceof com.OnOff1BitEnum) { boolean canonicalObject; if ((com.OnOff1BitEnum) src == com.OnOff1BitEnum.ON) { canonicalObject = true; } else { if ((com.OnOff1BitEnum) src == com.OnOff1BitEnum.OFF) { canonicalObject = false; } else { // Unreachable Code To Test throw new MappingException("Converter " + this.getClass().getCanonicalName() + " used incorrectly. Arguments passed in were: " + dest + " and " + src); } } return canonicalObject; } </code></pre> <p>That's the evil of "if else construct" that has no brackets in your original code. Also your "convert" method returns Object...so your "<code>boolean canonicalObject</code>" has to be "<strong>Boolean</strong> canonicalObject" not primitive type.</p> <p>Should be:</p> <pre><code>@Override public Object convert(Object dest, Object src, Class&lt;?&gt; destClass, Class&lt;?&gt; srcClass) { if (src instanceof com.OnOff1BitEnum) { if ((com.OnOff1BitEnum) src == com.OnOff1BitEnum.ON) { return Boolean.TRUE; } else { return Boolean.FALSE; } } return null; } </code></pre>
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    1. PODozer NullPointerException on deep-mapping with custom getter
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    1. USuser1697575
    1. USuser1697575
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      1. VTUpMod
    1. COI tried this and got the same error
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      1. USchad martin
    2. COI got the same error after changing the converter to what you suggested
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      1. USchad martin
 

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