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https://issues.apache.org/jira/browse/BEANUTILS-367?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Niall Pemberton resolved BEANUTILS-367.
---------------------------------------
Resolution: Duplicate
This duplicates BEANUTILS-349 and will be fixed in the BeanUtils 1.8.1 release
> java.lang.NullPointerException at
> org.apache.commons.beanutils.PropertyUtilsBean.invokeMethod(PropertyUtilsBean.java:2168)
> --------------------------------------------------------------------------------------------------------------------------
>
> Key: BEANUTILS-367
> URL: https://issues.apache.org/jira/browse/BEANUTILS-367
> Project: Commons BeanUtils
> Issue Type: Bug
> Components: Bean / Property Utils
> Affects Versions: 1.8.0
> Environment: 1.6 JDK
> Reporter: Lee Cooper
> Priority: Minor
>
> the reason this is thrown is because an IllegalArgumentException is thrown
> and then no one is checking the class to construct an error message anyway
> long story short I fixed it and here is how I did it....
> private Object invokeMethod(
> Method method,
> Object bean,
> Object[] values)
> throws
> IllegalAccessException,
> InvocationTargetException {
> try {
>
> return method.invoke(bean, values);
>
> } catch (IllegalArgumentException cause)
> {
> if(bean == null) {
> throw new IllegalArgumentException("No bean specified " +
> "- this should have been checked before reaching this
> method");
> }
>
> String valueString = "";
> if (values != null) {
> for (int i = 0; i < values.length; i++) {
> if (i>0) {
> valueString += ", " ;
> }
>
> //
> if(values[i] != null)
> {
> valueString += (values[i]).getClass().getName();
> }
> else
> {
> valueString += "Null Object Class Identity Not Known";
> }
> }
> }
> String expectedString = "";
> Class[] parTypes = method.getParameterTypes();
> if (parTypes != null) {
> for (int i = 0; i < parTypes.length; i++) {
> if (i > 0) {
> expectedString += ", ";
> }
> expectedString += parTypes[i].getName();
> }
> }
> IllegalArgumentException e = new IllegalArgumentException(
> "Cannot invoke " + method.getDeclaringClass().getName() + "."
> + method.getName() + " on bean class '" + bean.getClass() +
> "' - " + cause.getMessage()
> // as per https://issues.apache.org/jira/browse/BEANUTILS-224
> + " - had objects of type \"" + valueString
> + "\" but expected signature \""
> + expectedString + "\""
> );
> if (!BeanUtils.initCause(e, cause)) {
> log.error("Method invocation failed", cause);
> }
> throw e;
>
> }
> }
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