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Re: Transition rule EL Expression fails
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created by <a href="http://community.jboss.org/people/dondragon2">Donald Walters</a> in <i>jBPM</i> - <a href="http://community.jboss.org/message/564661#564661">View the full discussion</a>
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<div class="jive-rendered-content"><p>I am using version 4.4</p><p>The issue is in the ExpressionCondition class</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>public boolean evaluate(OpenExecution execution) {</p><p>        Object result = Expression.create(expression, language).evaluate();</p><p>        if (result instanceof Boolean) {</p><p>            return ((Boolean) result).booleanValue();</p><p>        }</p><p>             throw new JbpmException("expression condition '" + expression + "' did not return a boolean: " + result);</p><p>    }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Apparently the value that is returned by the Expression.create is a String " true " which would fail based on the conditions above. I had to modify the code to reflect the following.</p><p><p>public boolean evaluate(OpenExecution execution) {</p><p>        Object result = Expression.create(expression, language).evaluate();</p><p>        if (result instanceof Boolean) {</p><p>            return ((Boolean) result).booleanValue();</p><p>        }</p><p>        if (result instanceof String) {</p><p>            if(result == null)</p><p>                return false;</p><p>            return Boolean.valueOf(((String) result).trim());</p><p>        }</p><p>        throw new JbpmException("expression condition '" + expression + "' did not return a boolean: " + result);</p><p>    }</p></p><p>After doing that it is evaluated properly. This an issue that needs to resolved in the official distribution.</p><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">public boolean evaluate(OpenExecution execution) {</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">        Object result = Expression.create(expression, language).evaluate();</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">        if (result instanceof Boolean) {</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">            return ((Boolean) result).booleanValue();</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">        }</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">        if (result instanceof String) {</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">            if(result == null)</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">                return false;</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">            return Boolean.valueOf(((String) result).trim());</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">        }</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">        throw new JbpmException("expression condition '" + expression + "' did not return a boolean: " + result);</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">    }</div></div>
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