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Posted to dev@tapestry.apache.org by "Angelo Chen (JIRA)" <de...@tapestry.apache.org> on 2008/02/21 09:36:43 UTC
[jira] Created: (TAPESTRY-2184) createActionLink cause exception
when it is called in the page class, but works when it is called from the
template.
createActionLink cause exception when it is called in the page class, but works when it is called from the template.
----------------------------------------------------------------------------------------------------------------------
Key: TAPESTRY-2184
URL: https://issues.apache.org/jira/browse/TAPESTRY-2184
Project: Tapestry
Issue Type: Bug
Components: tapestry-core
Affects Versions: 5.0.10
Reporter: Angelo Chen
createActionLink cause exception when it is called in the page class(see onActionFromDelete), but works when it is called from the template, this works in 5.0.6 and 7, but fails in 5.0.9 and 5.0.10, sample code and error follows:
public class TestPage1 {
@Inject
private ComponentResources resources;
private Object[] _objs;
public Class onActivate(Object[] obj) { _objs = obj; return null; }
public Object[] onPassivate() { return _objs;}
Link onActionFromDelete(Long id) {
String x = getTheLink(); // this fails with exception
return null;
}
public String getTheLink() {
Link l = resources.createActionLink("DeleteConfirm", false);
return l.toURI();
}
public Object onDeleteConfirm(Long id) {
return null;
}
}
template:
<body>
<t:ActionLink t:id="Delete" context="1">Delete me</t:ActionLink><br />
<p>My Link is : ${theLink}</p>
</body>
errors:
java.lang.NullPointerException
Stack trace
* org.apache.tapestry.internal.services.LinkFactoryImpl.collectActivationContextForPage(LinkFactoryImpl.java:217)
* org.apache.tapestry.internal.services.LinkFactoryImpl.createActionLink(LinkFactoryImpl.java:129)
* org.apache.tapestry.internal.structure.PageImpl.createActionLink(PageImpl.java:156)
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[jira] Commented: (TAPESTRY-2184) Invoking createActionLink() in
code throws an NullPointerException even though using an ActionLink
component in the template does not
Posted by "Howard M. Lewis Ship (JIRA)" <de...@tapestry.apache.org>.
[ https://issues.apache.org/jira/browse/TAPESTRY-2184?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12571640#action_12571640 ]
Howard M. Lewis Ship commented on TAPESTRY-2184:
------------------------------------------------
Ok, this does fail:
public class ActionViaLinkDemo
{
@Persist("flash")
private String _message;
@Inject
private ComponentResources _resources;
Object[]
onPassivate()
{
return new Object[] { };
}
public String getMessage()
{
return _message;
}
void onUpdateMessage(String message)
{
getActionURL();
_message = message;
}
public String getActionURL()
{
Link link = _resources.createActionLink("UpdateMessage", false, "from getActionURL()");
return link.toURI();
}
}
Which fails inside onUpdateMessage() with:
java.lang.NullPointerException
at org.apache.tapestry.internal.services.LinkFactoryImpl.collectActivationContextForPage(LinkFactoryImpl.java:225)
at org.apache.tapestry.internal.services.LinkFactoryImpl.createActionLink(LinkFactoryImpl.java:134)
at $LinkFactory_118435737b9.createActionLink($LinkFactory_118435737b9.java)
at org.apache.tapestry.internal.structure.PageImpl.createActionLink(PageImpl.java:156)
at org.apache.tapestry.internal.structure.InternalComponentResourcesImpl.createActionLink(InternalComponentResourcesImpl.java:123)
at org.apache.tapestry.integration.app1.pages.ActionViaLinkDemo.getActionURL(ActionViaLinkDemo.java:36)
at org.apache.tapestry.integration.app1.pages.ActionViaLinkDemo.onUpdateMessage(ActionViaLinkDemo.java:29)
at org.apache.tapestry.integration.app1.pages.ActionViaLinkDemo.dispatchComponentEvent(ActionViaLinkDemo.java)
at org.apache.tapestry.internal.structure.ComponentPageElementImpl.dispatchEvent(ComponentPageElementImpl.java:843)
at org.apache.tapestry.internal.structure.ComponentPageElementImpl.triggerContextEvent(ComponentPageElementImpl.java:1004)
And here's the culprit:
Page activePage = _pageRenderQueue.getRenderingPage();
Which is broken when there is no rendering page.
We'll just assume, for the moment, that the current page is the active page. There's probably some obscure edge case where that won't work, but I can't quite envision it right now.
> Invoking createActionLink() in code throws an NullPointerException even though using an ActionLink component in the template does not
> -------------------------------------------------------------------------------------------------------------------------------------
>
> Key: TAPESTRY-2184
> URL: https://issues.apache.org/jira/browse/TAPESTRY-2184
> Project: Tapestry
> Issue Type: Bug
> Components: tapestry-core
> Affects Versions: 5.0.10
> Reporter: Angelo Chen
> Assignee: Howard M. Lewis Ship
>
> createActionLink cause exception when it is called in the page class(see onActionFromDelete), but works when it is called from the template, this works in 5.0.6 and 7, but fails in 5.0.9 and 5.0.10, sample code and error follows:
> public class TestPage1 {
> @Inject
> private ComponentResources resources;
> private Object[] _objs;
> public Class onActivate(Object[] obj) { _objs = obj; return null; }
> public Object[] onPassivate() { return _objs;}
> Link onActionFromDelete(Long id) {
> String x = getTheLink(); // this fails with exception
> return null;
> }
> public String getTheLink() {
> Link l = resources.createActionLink("DeleteConfirm", false);
> return l.toURI();
> }
> public Object onDeleteConfirm(Long id) {
> return null;
> }
> }
> template:
> <body>
> <t:ActionLink t:id="Delete" context="1">Delete me</t:ActionLink><br />
> <p>My Link is : ${theLink}</p>
> </body>
> errors:
> java.lang.NullPointerException
> Stack trace
> * org.apache.tapestry.internal.services.LinkFactoryImpl.collectActivationContextForPage(LinkFactoryImpl.java:217)
> * org.apache.tapestry.internal.services.LinkFactoryImpl.createActionLink(LinkFactoryImpl.java:129)
> * org.apache.tapestry.internal.structure.PageImpl.createActionLink(PageImpl.java:156)
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[jira] Commented: (TAPESTRY-2184) createActionLink cause exception
when it is called in the page class, but works when it is called from the
template.
Posted by "Davor Hrg (JIRA)" <de...@tapestry.apache.org>.
[ https://issues.apache.org/jira/browse/TAPESTRY-2184?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12570987#action_12570987 ]
Davor Hrg commented on TAPESTRY-2184:
-------------------------------------
LinkFactoryImpl(line:127)
Page activePage = _pageRenderQueue.getRenderingPage();
this is null in this case ...
I'm not sure if it is safe to assume:
if(activePage == null) activePage = page;
for this case this would be ok, but some other situation may misbehave ...
> createActionLink cause exception when it is called in the page class, but works when it is called from the template.
> ----------------------------------------------------------------------------------------------------------------------
>
> Key: TAPESTRY-2184
> URL: https://issues.apache.org/jira/browse/TAPESTRY-2184
> Project: Tapestry
> Issue Type: Bug
> Components: tapestry-core
> Affects Versions: 5.0.10
> Reporter: Angelo Chen
>
> createActionLink cause exception when it is called in the page class(see onActionFromDelete), but works when it is called from the template, this works in 5.0.6 and 7, but fails in 5.0.9 and 5.0.10, sample code and error follows:
> public class TestPage1 {
> @Inject
> private ComponentResources resources;
> private Object[] _objs;
> public Class onActivate(Object[] obj) { _objs = obj; return null; }
> public Object[] onPassivate() { return _objs;}
> Link onActionFromDelete(Long id) {
> String x = getTheLink(); // this fails with exception
> return null;
> }
> public String getTheLink() {
> Link l = resources.createActionLink("DeleteConfirm", false);
> return l.toURI();
> }
> public Object onDeleteConfirm(Long id) {
> return null;
> }
> }
> template:
> <body>
> <t:ActionLink t:id="Delete" context="1">Delete me</t:ActionLink><br />
> <p>My Link is : ${theLink}</p>
> </body>
> errors:
> java.lang.NullPointerException
> Stack trace
> * org.apache.tapestry.internal.services.LinkFactoryImpl.collectActivationContextForPage(LinkFactoryImpl.java:217)
> * org.apache.tapestry.internal.services.LinkFactoryImpl.createActionLink(LinkFactoryImpl.java:129)
> * org.apache.tapestry.internal.structure.PageImpl.createActionLink(PageImpl.java:156)
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[jira] Closed: (TAPESTRY-2184) Null pointer exception when creating
an action link during a component event request
Posted by "Howard M. Lewis Ship (JIRA)" <de...@tapestry.apache.org>.
[ https://issues.apache.org/jira/browse/TAPESTRY-2184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Howard M. Lewis Ship closed TAPESTRY-2184.
------------------------------------------
Resolution: Fixed
Fix Version/s: 5.0.11
> Null pointer exception when creating an action link during a component event request
> ------------------------------------------------------------------------------------
>
> Key: TAPESTRY-2184
> URL: https://issues.apache.org/jira/browse/TAPESTRY-2184
> Project: Tapestry
> Issue Type: Bug
> Components: tapestry-core
> Affects Versions: 5.0.10
> Reporter: Angelo Chen
> Assignee: Howard M. Lewis Ship
> Fix For: 5.0.11
>
>
> createActionLink cause exception when it is called in the page class(see onActionFromDelete), but works when it is called from the template, this works in 5.0.6 and 7, but fails in 5.0.9 and 5.0.10, sample code and error follows:
> public class TestPage1 {
> @Inject
> private ComponentResources resources;
> private Object[] _objs;
> public Class onActivate(Object[] obj) { _objs = obj; return null; }
> public Object[] onPassivate() { return _objs;}
> Link onActionFromDelete(Long id) {
> String x = getTheLink(); // this fails with exception
> return null;
> }
> public String getTheLink() {
> Link l = resources.createActionLink("DeleteConfirm", false);
> return l.toURI();
> }
> public Object onDeleteConfirm(Long id) {
> return null;
> }
> }
> template:
> <body>
> <t:ActionLink t:id="Delete" context="1">Delete me</t:ActionLink><br />
> <p>My Link is : ${theLink}</p>
> </body>
> errors:
> java.lang.NullPointerException
> Stack trace
> * org.apache.tapestry.internal.services.LinkFactoryImpl.collectActivationContextForPage(LinkFactoryImpl.java:217)
> * org.apache.tapestry.internal.services.LinkFactoryImpl.createActionLink(LinkFactoryImpl.java:129)
> * org.apache.tapestry.internal.structure.PageImpl.createActionLink(PageImpl.java:156)
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[jira] Commented: (TAPESTRY-2184) Null pointer exception when
creating an action link during a component event request
Posted by "Robert Zeigler (JIRA)" <de...@tapestry.apache.org>.
[ https://issues.apache.org/jira/browse/TAPESTRY-2184?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12571649#action_12571649 ]
Robert Zeigler commented on TAPESTRY-2184:
------------------------------------------
Not quite sure what you mean by "current page", but...
suppose you have, say, a view block contribution, or edit block contribution, that creates an action link; it'll be in a page, say, ViewBlocks, but the rendering page might be, say, ListOrders. So then if the action handler in ViewBlocks is called, and it, in turn, calls createActionLink, would the "active" page be ViewBlocks, or ListOrders?
It ought to be ListOrders, but...
> Null pointer exception when creating an action link during a component event request
> ------------------------------------------------------------------------------------
>
> Key: TAPESTRY-2184
> URL: https://issues.apache.org/jira/browse/TAPESTRY-2184
> Project: Tapestry
> Issue Type: Bug
> Components: tapestry-core
> Affects Versions: 5.0.10
> Reporter: Angelo Chen
> Assignee: Howard M. Lewis Ship
> Fix For: 5.0.11
>
>
> createActionLink cause exception when it is called in the page class(see onActionFromDelete), but works when it is called from the template, this works in 5.0.6 and 7, but fails in 5.0.9 and 5.0.10, sample code and error follows:
> public class TestPage1 {
> @Inject
> private ComponentResources resources;
> private Object[] _objs;
> public Class onActivate(Object[] obj) { _objs = obj; return null; }
> public Object[] onPassivate() { return _objs;}
> Link onActionFromDelete(Long id) {
> String x = getTheLink(); // this fails with exception
> return null;
> }
> public String getTheLink() {
> Link l = resources.createActionLink("DeleteConfirm", false);
> return l.toURI();
> }
> public Object onDeleteConfirm(Long id) {
> return null;
> }
> }
> template:
> <body>
> <t:ActionLink t:id="Delete" context="1">Delete me</t:ActionLink><br />
> <p>My Link is : ${theLink}</p>
> </body>
> errors:
> java.lang.NullPointerException
> Stack trace
> * org.apache.tapestry.internal.services.LinkFactoryImpl.collectActivationContextForPage(LinkFactoryImpl.java:217)
> * org.apache.tapestry.internal.services.LinkFactoryImpl.createActionLink(LinkFactoryImpl.java:129)
> * org.apache.tapestry.internal.structure.PageImpl.createActionLink(PageImpl.java:156)
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[jira] Assigned: (TAPESTRY-2184) createActionLink cause exception
when it is called in the page class, but works when it is called from the
template.
Posted by "Howard M. Lewis Ship (JIRA)" <de...@tapestry.apache.org>.
[ https://issues.apache.org/jira/browse/TAPESTRY-2184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Howard M. Lewis Ship reassigned TAPESTRY-2184:
----------------------------------------------
Assignee: Howard M. Lewis Ship
> createActionLink cause exception when it is called in the page class, but works when it is called from the template.
> ----------------------------------------------------------------------------------------------------------------------
>
> Key: TAPESTRY-2184
> URL: https://issues.apache.org/jira/browse/TAPESTRY-2184
> Project: Tapestry
> Issue Type: Bug
> Components: tapestry-core
> Affects Versions: 5.0.10
> Reporter: Angelo Chen
> Assignee: Howard M. Lewis Ship
>
> createActionLink cause exception when it is called in the page class(see onActionFromDelete), but works when it is called from the template, this works in 5.0.6 and 7, but fails in 5.0.9 and 5.0.10, sample code and error follows:
> public class TestPage1 {
> @Inject
> private ComponentResources resources;
> private Object[] _objs;
> public Class onActivate(Object[] obj) { _objs = obj; return null; }
> public Object[] onPassivate() { return _objs;}
> Link onActionFromDelete(Long id) {
> String x = getTheLink(); // this fails with exception
> return null;
> }
> public String getTheLink() {
> Link l = resources.createActionLink("DeleteConfirm", false);
> return l.toURI();
> }
> public Object onDeleteConfirm(Long id) {
> return null;
> }
> }
> template:
> <body>
> <t:ActionLink t:id="Delete" context="1">Delete me</t:ActionLink><br />
> <p>My Link is : ${theLink}</p>
> </body>
> errors:
> java.lang.NullPointerException
> Stack trace
> * org.apache.tapestry.internal.services.LinkFactoryImpl.collectActivationContextForPage(LinkFactoryImpl.java:217)
> * org.apache.tapestry.internal.services.LinkFactoryImpl.createActionLink(LinkFactoryImpl.java:129)
> * org.apache.tapestry.internal.structure.PageImpl.createActionLink(PageImpl.java:156)
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[jira] Updated: (TAPESTRY-2184) Invoking createActionLink() in code
throws an NullPointerException even though using an ActionLink component in
the template does not
Posted by "Howard M. Lewis Ship (JIRA)" <de...@tapestry.apache.org>.
[ https://issues.apache.org/jira/browse/TAPESTRY-2184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Howard M. Lewis Ship updated TAPESTRY-2184:
-------------------------------------------
Summary: Invoking createActionLink() in code throws an NullPointerException even though using an ActionLink component in the template does not (was: createActionLink cause exception when it is called in the page class, but works when it is called from the template. )
So far I can't get this to fail the way you list it, short of:
Object[] onPassivate() { return new Object[] { null }; }
Which fails a bit differently:
java.lang.IllegalArgumentException: Parameter value was null.
at org.apache.tapestry.ioc.internal.util.Defense.notNull(Defense.java:37)
at org.apache.tapestry.internal.services.ContextValueEncoderImpl.toClient(ContextValueEncoderImpl.java:33)
at $ContextValueEncoder_118435737b3.toClient($ContextValueEncoder_118435737b3.java)
at org.apache.tapestry.internal.services.LinkFactoryImpl.toContextStrings(LinkFactoryImpl.java:239)
at org.apache.tapestry.internal.services.LinkFactoryImpl.collectActivationContextForPage(LinkFactoryImpl.java:229)
at org.apache.tapestry.internal.services.LinkFactoryImpl.createActionLink(LinkFactoryImpl.java:134)
at $LinkFactory_118435737b9.createActionLink($LinkFactory_118435737b9.java)
at org.apache.tapestry.internal.structure.PageImpl.createActionLink(PageImpl.java:156)
at org.apache.tapestry.internal.structure.InternalComponentResourcesImpl.createActionLink(InternalComponentResourcesImpl.java:123)
at org.apache.tapestry.integration.app1.pages.ActionViaLinkDemo.getActionURL(ActionViaLinkDemo.java:34)
at $PropertyConduit_11843573b25.get($PropertyConduit_11843573b25.java)
at org.apache.tapestry.internal.bindings.PropBinding.get(PropBinding.java:54)
> Invoking createActionLink() in code throws an NullPointerException even though using an ActionLink component in the template does not
> -------------------------------------------------------------------------------------------------------------------------------------
>
> Key: TAPESTRY-2184
> URL: https://issues.apache.org/jira/browse/TAPESTRY-2184
> Project: Tapestry
> Issue Type: Bug
> Components: tapestry-core
> Affects Versions: 5.0.10
> Reporter: Angelo Chen
> Assignee: Howard M. Lewis Ship
>
> createActionLink cause exception when it is called in the page class(see onActionFromDelete), but works when it is called from the template, this works in 5.0.6 and 7, but fails in 5.0.9 and 5.0.10, sample code and error follows:
> public class TestPage1 {
> @Inject
> private ComponentResources resources;
> private Object[] _objs;
> public Class onActivate(Object[] obj) { _objs = obj; return null; }
> public Object[] onPassivate() { return _objs;}
> Link onActionFromDelete(Long id) {
> String x = getTheLink(); // this fails with exception
> return null;
> }
> public String getTheLink() {
> Link l = resources.createActionLink("DeleteConfirm", false);
> return l.toURI();
> }
> public Object onDeleteConfirm(Long id) {
> return null;
> }
> }
> template:
> <body>
> <t:ActionLink t:id="Delete" context="1">Delete me</t:ActionLink><br />
> <p>My Link is : ${theLink}</p>
> </body>
> errors:
> java.lang.NullPointerException
> Stack trace
> * org.apache.tapestry.internal.services.LinkFactoryImpl.collectActivationContextForPage(LinkFactoryImpl.java:217)
> * org.apache.tapestry.internal.services.LinkFactoryImpl.createActionLink(LinkFactoryImpl.java:129)
> * org.apache.tapestry.internal.structure.PageImpl.createActionLink(PageImpl.java:156)
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[jira] Commented: (TAPESTRY-2184) createActionLink cause exception
when it is called in the page class, but works when it is called from the
template.
Posted by "Ted Steen (JIRA)" <de...@tapestry.apache.org>.
[ https://issues.apache.org/jira/browse/TAPESTRY-2184?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12571035#action_12571035 ]
Ted Steen commented on TAPESTRY-2184:
-------------------------------------
@Davor Hrg, That was my solution also, but as you say, maybe it will misbehave in other situations.
resources.createActionLink(...) seem to work between setupRender() and cleanupRender().
> createActionLink cause exception when it is called in the page class, but works when it is called from the template.
> ----------------------------------------------------------------------------------------------------------------------
>
> Key: TAPESTRY-2184
> URL: https://issues.apache.org/jira/browse/TAPESTRY-2184
> Project: Tapestry
> Issue Type: Bug
> Components: tapestry-core
> Affects Versions: 5.0.10
> Reporter: Angelo Chen
>
> createActionLink cause exception when it is called in the page class(see onActionFromDelete), but works when it is called from the template, this works in 5.0.6 and 7, but fails in 5.0.9 and 5.0.10, sample code and error follows:
> public class TestPage1 {
> @Inject
> private ComponentResources resources;
> private Object[] _objs;
> public Class onActivate(Object[] obj) { _objs = obj; return null; }
> public Object[] onPassivate() { return _objs;}
> Link onActionFromDelete(Long id) {
> String x = getTheLink(); // this fails with exception
> return null;
> }
> public String getTheLink() {
> Link l = resources.createActionLink("DeleteConfirm", false);
> return l.toURI();
> }
> public Object onDeleteConfirm(Long id) {
> return null;
> }
> }
> template:
> <body>
> <t:ActionLink t:id="Delete" context="1">Delete me</t:ActionLink><br />
> <p>My Link is : ${theLink}</p>
> </body>
> errors:
> java.lang.NullPointerException
> Stack trace
> * org.apache.tapestry.internal.services.LinkFactoryImpl.collectActivationContextForPage(LinkFactoryImpl.java:217)
> * org.apache.tapestry.internal.services.LinkFactoryImpl.createActionLink(LinkFactoryImpl.java:129)
> * org.apache.tapestry.internal.structure.PageImpl.createActionLink(PageImpl.java:156)
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[jira] Updated: (TAPESTRY-2184) Null pointer exception when
creating an action link during a component event request
Posted by "Howard M. Lewis Ship (JIRA)" <de...@tapestry.apache.org>.
[ https://issues.apache.org/jira/browse/TAPESTRY-2184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Howard M. Lewis Ship updated TAPESTRY-2184:
-------------------------------------------
Summary: Null pointer exception when creating an action link during a component event request (was: Invoking createActionLink() in code throws an NullPointerException even though using an ActionLink component in the template does not)
> Null pointer exception when creating an action link during a component event request
> ------------------------------------------------------------------------------------
>
> Key: TAPESTRY-2184
> URL: https://issues.apache.org/jira/browse/TAPESTRY-2184
> Project: Tapestry
> Issue Type: Bug
> Components: tapestry-core
> Affects Versions: 5.0.10
> Reporter: Angelo Chen
> Assignee: Howard M. Lewis Ship
>
> createActionLink cause exception when it is called in the page class(see onActionFromDelete), but works when it is called from the template, this works in 5.0.6 and 7, but fails in 5.0.9 and 5.0.10, sample code and error follows:
> public class TestPage1 {
> @Inject
> private ComponentResources resources;
> private Object[] _objs;
> public Class onActivate(Object[] obj) { _objs = obj; return null; }
> public Object[] onPassivate() { return _objs;}
> Link onActionFromDelete(Long id) {
> String x = getTheLink(); // this fails with exception
> return null;
> }
> public String getTheLink() {
> Link l = resources.createActionLink("DeleteConfirm", false);
> return l.toURI();
> }
> public Object onDeleteConfirm(Long id) {
> return null;
> }
> }
> template:
> <body>
> <t:ActionLink t:id="Delete" context="1">Delete me</t:ActionLink><br />
> <p>My Link is : ${theLink}</p>
> </body>
> errors:
> java.lang.NullPointerException
> Stack trace
> * org.apache.tapestry.internal.services.LinkFactoryImpl.collectActivationContextForPage(LinkFactoryImpl.java:217)
> * org.apache.tapestry.internal.services.LinkFactoryImpl.createActionLink(LinkFactoryImpl.java:129)
> * org.apache.tapestry.internal.structure.PageImpl.createActionLink(PageImpl.java:156)
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