[jira] [Assigned] (TAP5-2688) TypeCoercer fails to coerce String to Collection since 5.7

["Ben Weidig (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TAP5-2688?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ben Weidig reassigned TAP5-2688:
--------------------------------

    Assignee: Ben Weidig

> TypeCoercer fails to coerce String to Collection since 5.7
> ----------------------------------------------------------
>
>                 Key: TAP5-2688
>                 URL: https://issues.apache.org/jira/browse/TAP5-2688
>             Project: Tapestry 5
>          Issue Type: Bug
>    Affects Versions: 5.7.3
>            Reporter: Yannick Dylla
>            Assignee: Ben Weidig
>            Priority: Major
>
> Hi,
>  with Tapestry 5.7.3 the TypeCoercer fails to coerce String to Collection. With 5.6 this worked fine and produced a single element list.
>  It is probably the fault of JSONArray which now implements Collection.
> When one uses List.class as target for the TypeCoercer the example works fine.
> Example program:
> {code:java}
> import org.apache.tapestry5.commons.services.TypeCoercer;
> import org.apache.tapestry5.ioc.Registry;
> import org.apache.tapestry5.ioc.RegistryBuilder;
> import org.apache.tapestry5.json.modules.JSONModule;
> import java.util.Collection;
> import java.util.List;
> public class TypeCoercerBug {
>   public static void main(String[] args) throws Exception {
>     Registry registry = RegistryBuilder.buildAndStartupRegistry(JSONModule.class);
>     try {
>       TypeCoercer typeCoercer = registry.getService(TypeCoercer.class);
>       List<String> expected = List.of("foo");
>       Object result = typeCoercer.coerce("foo", Collection.class);
>       System.out.println("RESULT: " + result);
>       if (!expected.equals(result)) {
>         throw new Exception(expected + " != " + result);
>       }
>     } finally {
>       registry.shutdown();
>     }
>   }
> }
> {code}
> Stacktrace:
> {code:java}
> Exception in thread "main" java.lang.RuntimeException: Coercion of foo to type java.util.Collection (via String --> org.apache.tapestry5.json.JSONArray) failed: A JSONArray text must start with '[' (actual: 'f') at character 1 of foo
>     at org.apache.tapestry5.commons.internal.services.TypeCoercerImpl$TargetCoercion.coerce(TypeCoercerImpl.java:79)
>     at org.apache.tapestry5.commons.internal.services.TypeCoercerImpl.coerce(TypeCoercerImpl.java:155)
>     at $TypeCoercer_14735c6695ab1.coerce(Unknown Source)
>     at TypeCoercerBug.main(TypeCoercerBug.java:16)
> Caused by: org.apache.tapestry5.json.exceptions.JSONSyntaxException: A JSONArray text must start with '[' (actual: 'f') at character 1 of foo
>     at org.apache.tapestry5.json.JSONTokener.syntaxError(JSONTokener.java:509)
>     at org.apache.tapestry5.json.JSONTokener.nextValue(JSONTokener.java:119)
>     at org.apache.tapestry5.json.JSONArray.<init>(JSONArray.java:78)
>     at org.apache.tapestry5.json.JSONArray.<init>(JSONArray.java:95)
>     at org.apache.tapestry5.internal.json.StringToJSONArray.coerce(StringToJSONArray.java:26)
>     at org.apache.tapestry5.internal.json.StringToJSONArray.coerce(StringToJSONArray.java:23)
>     at org.apache.tapestry5.commons.services.CoercionTuple$CoercionWrapper.coerce(CoercionTuple.java:57)
>     at org.apache.tapestry5.commons.internal.services.TypeCoercerImpl$TargetCoercion.coerce(TypeCoercerImpl.java:76)
>     ... 3 more
> {code}



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