Problem injecting Java 5 Generics Map

[jbisotti]

My implementation contains the following (SettingNameMapper is a Java 5 enum):

   ...
   private Map<SettingNameMapper, Pattern> excludeRegex;
   ...
   public void setExcludeRegex( final Map<SettingNameMapper, Pattern> excludeRegex )
   {
      this.excludeRegex =
         new HashMap<SettingNameMapper, Pattern>( includeRegex );
   }

   public Map<SettingNameMapper, Pattern> getExcludeRegex()
   {
      return this.excludeRegex;
   }
   ...

The appContext snippet:

                                ...
                                <property name="excludeRegex">
                                    <map>
                                        <!-- Foo is a valid SettingNameMapper -->
                                        <entry key="Foo">
                                            <bean
                                                class="java.util.regex.Pattern"
                                                factory-method="compile">
                                                <constructor-arg>
                                                    <value>ABC</value>
                                                </constructor-arg>
                                            </bean>
                                        </entry>
                                    </map>
                                </property>
                                ...

The error:

    ...
    [junit] Caused by: PropertyAccessExceptionsException (1 errors)
    [junit] org.springframework.beans.TypeMismatchException: Failed to convert property value of type [java.util.LinkedHashMap] to required type [java.util.Map] for property 'excludeRegex'; nested exception is java.lang.IllegalArgumentException: No matching editors or conversion strategy found
    [junit] Caused by: java.lang.IllegalArgumentException: No matching editors or conversion strategy found
    [junit]     at org.springframework.beans.PropertyTypeConverter.convertIfNecessary
(PropertyTypeConverter.java:209)
    [junit]     at org.springframework.beans.PropertyTypeConverter.convertIfNecessary
(PropertyTypeConverter.java:93)
    [junit]     at org.springframework.beans.PropertyTypeConverter.convertToTypedMap(PropertyTypeConverter.java:326)
    [junit]     at org.springframework.beans.PropertyTypeConverter.convertIfNecessary(PropertyTypeConverter.java:190)
    [junit]     at org.springframework.beans.PropertyTypeConverter.convertIfNecessary(PropertyTypeConverter.java:108)
    [junit]     at org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:723)
    [junit]     at org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:575)
    [junit]     at org.springframework.beans.AbstractPropertyAccessor.setPropertyValue(AbstractPropertyAccessor.java:49)
    [junit]     at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:68)
    [junit]     at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:57)
    [junit]     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:816)
    [junit]     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:592)
    [junit]     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:392)
    [junit]     at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveInnerBeanDefinition(BeanDefinitionValueResolver.java:174)
    [junit]     at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:105)
    [junit]     at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveManagedMap(BeanDefinitionValueResolver.java:274)
    [junit]     at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:126)
    [junit]     at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveManagedMap(BeanDefinitionValueResolver.java:274)
    [junit]     at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:126)
    [junit]     at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveManagedMap(BeanDefinitionValueResolver.java:274)
    [junit]     at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:126)
    [junit]     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:801)
    [junit]     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:592)
    [junit]     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:392)
    [junit]     at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:240)
    [junit]     at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:132)
    [junit]     at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:237)
    [junit]     at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:153)
    [junit]     at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:225)
    [junit]     at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:114)
    [junit]     at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveManagedMap(BeanDefinitionValueResolver.java:274)
    [junit]     at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:126)
    [junit]     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:801)
    [junit]     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:592)
    [junit]     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:392)
    [junit]     at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:240)
    [junit]     at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:132)
    [junit]     at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:237)
    [junit]     at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:153)
    [junit]     at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:254)
    [junit]     at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:337)
    [junit]     at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:92)
    [junit]     at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:77)
    ...

Just for kickes, I changed my getter/setting from Map<> to LinkedHashMap<>, but still got the following:

    [junit] Caused by: PropertyAccessExceptionsException (1 errors)
    [junit] org.springframework.beans.TypeMismatchException: Failed to convert property value of type [java.util.LinkedHashMap] to required type [java.util.LinkedHashMap] for property 'excludeRegex'; nested exception is java.lang.IllegalArgumentException:
 No matching editors or conversion strategy found
    [junit] Caused by: java.lang.IllegalArgumentException: No matching editors or conversion strategy found
    [junit]     at org.springframework.beans.PropertyTypeConverter.convertIfNecessary(PropertyTypeConverter.java:209)
    [junit]     at org.springframework.beans.PropertyTypeConverter.convertIfNecessary(PropertyTypeConverter.java:93)
    [junit]     at org.springframework.beans.PropertyTypeConverter.convertToTypedMap(PropertyTypeConverter.java:326)
    [junit]     at org.springframework.beans.PropertyTypeConverter.convertIfNecessary(PropertyTypeConverter.java:190)
    [junit]     at org.springframework.beans.PropertyTypeConverter.convertIfNecessary(PropertyTypeConverter.java:108)
    [junit]     at org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:723)
    [junit]     at org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:575)
    [junit]     at org.springframework.beans.AbstractPropertyAccessor.setPropertyValue(AbstractPropertyAccessor.java:49)
    [junit]     at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:68)
    [junit]     at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:57)
    ...

What am I doing wrong?

[jbisotti]

The error message wasn't very helpful, but it turned out to be "user error". Turns out "Foo" was not a valid enum; "FOO" was. So, the problem was that I was attempting to inject Map<String, Pattern> instead of Map<SettingNameMapper, Pattern>. Once I realized that, it worked like a charm.