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https://issues.apache.org/jira/browse/DIGESTER-180?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14257205#comment-14257205
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Barney Barumba edited comment on DIGESTER-180 at 12/23/14 5:02 PM:
-------------------------------------------------------------------
Just found something else which may be relevant... as above, if
{{addWidgetIternal}} is {{public}} I see it get called twice, and if it is
{{private}} then it is only called once and everything is ok. However, if I
make it {{protected}} I see the following exception:
{code}
04:00:55 ERROR org.apache.commons.digester3.Digester: End event threw exception
java.lang.IllegalAccessException: Class
org.apache.commons.digester3.ObjectCreateRule$DeferredConstructionCallback can
not access a member of class Box with modifiers "protected"
at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:109)
at
java.lang.reflect.AccessibleObject.slowCheckMemberAccess(AccessibleObject.java:261)
at
java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:253)
at java.lang.reflect.Method.invoke(Method.java:599)
at
org.apache.commons.digester3.ObjectCreateRule$DeferredConstructionCallback.establishDelegate(ObjectCreateRule.java:83)
at
org.apache.commons.digester3.ObjectCreateRule$ProxyManager.finalize(ObjectCreateRule.java:184)
at
org.apache.commons.digester3.ObjectCreateRule.end(ObjectCreateRule.java:388)
at org.apache.commons.digester3.Digester.endElement(Digester.java:1128)
{code}
was (Author: baarney):
Full source code of test.
> Digester calls invalid method when using proxy ObjectCreate rule
> ----------------------------------------------------------------
>
> Key: DIGESTER-180
> URL: https://issues.apache.org/jira/browse/DIGESTER-180
> Project: Commons Digester
> Issue Type: Bug
> Affects Versions: 3.2
> Environment: Linux x_86_64, JDK 1.7.0_65
> Reporter: Barney Barumba
> Attachments: Box.java
>
>
> Hi, I've encountered some strange behaviour when using the new proxy object
> create: the digester appears to call a method that is never mentioned in the
> digester rules! I've simplified it as much as I can to the following (full,
> runnable code attached):
> A simple box of widgets:
> {code}
> private final String id;
> private final Set<String> widgetIds = new HashSet<>();
>
> public Box(String id) {
> System.out.println("Box: id=" + id);
> this.id = id;
> }
>
> public void addWidget(String widgetId) {
> System.out.println("addWidget: id=" + id + ", wid=" + widgetId);
> addWidgetInternal(widgetId);
> }
>
> public void addWidgetInternal(String widgetId) {
> System.out.println("addWidgetInternal: id=" + id + ", wid=" + widgetId);
> if (widgetIds.contains(widgetId)) {
> System.err.println("*** box already contains widget " + widgetId);
> } else {
> widgetIds.add(widgetId);
> }
> }
> {code}
> The source XML is fairly straightforward:
> {code}
> <box id='b01'>
> <widget wid='w01'>Widget 1</widget>
> </box>
> {code}
> as are the rules:
> {code}
> forPattern("box")
> .createObject().ofType(Box.class).usingConstructor(String.class)
> .usingDefaultConstructorArguments("")
> .then().callParam().fromAttribute("id").ofIndex(0);
>
> forPattern("box/widget")
> .callMethod("addWidget")
> .withParamCount(1)
> .then().callParam().fromAttribute("wid").ofIndex(0);
> {code}
> The key point here is that the rules only ever invoke {{addWidget}}, and this
> calls {{addWidgetInternal}}. However, when I run this, {{addWidgetInternal}}
> gets called twice, the second time directly from the digester, and I get the
> following output:
> {code}
> Box: id=
> addWidget: id=, wid=w01
> addWidgetInternal: id=, wid=w01
> Box: id=b01
> addWidget: id=b01, wid=w01
> addWidgetInternal: id=b01, wid=w01
> addWidgetInternal: id=b01, wid=w01
> *** box already contains widget w01
> {code}
> I'm guessing that this is connected with the proxy code because I can change
> any number of things to make it work:
> * Make {{addWidgetInternal}} private;
> * Call {{addWidgetInternal}} directly from the digester rules.
> * Use a custom object create rule instead (see attached code).
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