Hmm - don't see anything wrong... Are you using the latest ognl ...
afaik it's 2.7.3
Also, even though i dont remember (and kind find) any such bug report,
how hard is
it to try this with 4.1.6 ?
On Sat, Oct 24, 2009 at 9:08 PM, Marc van Kempen <m...@bowtie.nl> wrote:
> Hi Andreas,
>
> When the application starts, first a page is displayed that contains the
> HelpBalloonDialog component, hence it's script expression is compiled into
> the expression cache. Then I open a page that uses the Dialog component, now
> it seems to retrieve the compiled expression for the other script and poof!
>
> Here is the exception:
>
> [ +/- ] Exception: Unable to read OGNL expression '<parsed OGNL expression>'
> of {component=$dialog_...@b03d85e5[assetsmanagement/fileManager.$Dialog],
> widget=dialog,
> props={"bgColor":"black","bgOpacity":0.4000000059604645,"followScroll":true,"closeOnBackgroundClick":false,"blockDuration":0,"lifeTime":0,"toggle":"fade","toggleDuration":150}}:
> $Dialog_142 cannot be cast to nl.relate4u.pcc.contexthelp.HelpBalloonDialog
> org.apache.hivemind.ApplicationRuntimeException
> location: classpath:/org/apache/tapestry/dojo/html/Dialog.script, line
> 36, column 43
> 31 </unique>
> 32 </body>
> 33
> 34 <initialization>
> 35
> tapestry.widget.synchronizeWidgetState("${component.clientId}", "Dialog",
> ${props}, ${component.destroy});
> 36 <if expression="component.hidden">
> 37 dojo.widget.byId("${component.clientId}").hide();
> 38 </if>
> 39 <if-not expression="component.hidden">
> 40 dojo.widget.byId("${component.clientId}").show();
> 41 </if-not>
>
> [ +/- ] Exception: Unable to read OGNL expression '<parsed OGNL expression>'
> of {component=$dialog_...@b03d85e5[assetsmanagement/fileManager.$Dialog],
> widget=dialog,
> props={"bgColor":"black","bgOpacity":0.4000000059604645,"followScroll":true,"closeOnBackgroundClick":false,"blockDuration":0,"lifeTime":0,"toggle":"fade","toggleDuration":150}}:
> $Dialog_142 cannot be cast to nl.relate4u.pcc.contexthelp.HelpBalloonDialog
> [ +/- ] Exception: $Dialog_142 cannot be cast to
> nl.relate4u.pcc.contexthelp.HelpBalloonDialog
> java.lang.ClassCastException
> Stack Trace:
> $ASTChain_12487ac4bf9.get($ASTChain_12487ac4bf9.java)
> org.apache.tapestry.services.impl.ExpressionEvaluatorImpl.read(ExpressionEvaluatorImpl.java:141)
> org.apache.tapestry.services.impl.ExpressionEvaluatorImpl.read(ExpressionEvaluatorImpl.java:110)
> $ExpressionEvaluator_12487ac4a68.read($ExpressionEvaluator_12487ac4a68.java)
> org.apache.tapestry.script.ScriptSessionImpl.evaluate(ScriptSessionImpl.java:86)
> org.apache.tapestry.script.ScriptSessionImpl.evaluate(ScriptSessionImpl.java:91)
> org.apache.tapestry.script.AbstractToken.evaluateBoolean(AbstractToken.java:102)
> org.apache.tapestry.script.IfToken.evaluate(IfToken.java:43)
> org.apache.tapestry.script.IfToken.write(IfToken.java:48)
> org.apache.tapestry.script.AbstractToken.writeChildren(AbstractToken.java:71)
> org.apache.tapestry.script.InitToken.write(InitToken.java:43)
> org.apache.tapestry.script.AbstractToken.writeChildren(AbstractToken.java:71)
> org.apache.tapestry.script.ParsedScript.execute(ParsedScript.java:82)
> org.apache.tapestry.dojo.html.Dialog.renderWidget(Dialog.java:106)
> (rest of stack trace omitted)
> Here is the code for HelpBalloonDialog (the dialog component is the standard
> Tapestry component included in the distribution):
>
> HelpBalloonDialog.java:
>
> package nl.relate4u.pcc.contexthelp;
>
> import java.util.HashMap;
> import java.util.Map;
>
> import org.apache.tapestry.IMarkupWriter;
> import org.apache.tapestry.IRequestCycle;
> import org.apache.tapestry.IScript;
> import org.apache.tapestry.TapestryUtils;
> import org.apache.tapestry.dojo.AbstractWidget;
> import org.apache.tapestry.services.ResponseBuilder;
>
> /**
> * Implementation of HelpBalloons, by calling custom javascript code.
> */
> public abstract class HelpBalloonDialog extends AbstractWidget {
> public abstract boolean isHidden();
>
> public abstract void setHidden(boolean hidden);
>
> public abstract String getIconElementId();
>
> public abstract void setIconElementId(String v);
>
> public abstract void setTitle(String title);
>
> public abstract String getTitle();
>
> public void show() {
> setHidden(false);
> }
>
> public void hide() {
> setHidden(true);
> }
>
> /**
> * {...@inheritdoc}
> */
> public void renderWidget(IMarkupWriter writer, IRequestCycle cycle) {
> if (!cycle.isRewinding()) {
> writer.begin(getTemplateTagName()); // use element specified
> renderIdAttribute(writer, cycle); // render id="" client id
> renderInformalParameters(writer, cycle);
> }
>
> renderBody(writer, cycle);
>
> if (!cycle.isRewinding()) writer.end();
>
> if (!cycle.isRewinding()) {
> Map<String, Object> parms = new HashMap<String, Object>();
> parms.put("component", this);
>
> getScript().execute(this, cycle,
> TapestryUtils.getPageRenderSupport(cycle, this), parms);
>
> if (isResizing()) {
> if
> (!getResponseBuilder().isInitializationScriptAllowed(this)) {
> getResponseBuilder().updateComponent(getId());
> }
>
> getResponseBuilder().addScriptAfterInitialization(this,
> "dojo.widget.byId('" + getClientId() +
> "').checkSize();");
> }
> }
> }
>
> public abstract ResponseBuilder getResponseBuilder();
>
> // TODO left over from Dialog code, do we need the resize stuff??
> public abstract boolean isResizing();
>
> public abstract void setResizing(boolean value);
>
> /** injected. */
> public abstract IScript getScript();
> }
>
> HelpBalloonDialog.jwc:
>
> <?xml version="1.0" encoding="UTF-8"?>
> <!DOCTYPE component-specification PUBLIC
> "-//Apache Software Foundation//Tapestry Specification 4.0//EN"
> "http://tapestry.apache.org/dtd/Tapestry_4_0.dtd";>
>
> <component-specification
> class="nl.relate4u.pcc.contexthelp.HelpBalloonDialog"
> allow-body="yes" allow-informal-parameters="yes">
>
> <description>
> Creates a HelpBalloon Dialog.
> </description>
>
> <parameter name="hidden" default-value="ognl:true" />
> <parameter name="title" default-value="Help Title" />
> <parameter name="iconElementId" default-value="unknown" />
>
> <inject property="script" type="script"
> object="HelpBalloonDialog.script"/>
>
> </component-specification>
>
> HelpBalloonDialog.script:
>
> <?xml version="1.0"?>
> <!DOCTYPE script PUBLIC
> "-//Apache Software Foundation//Tapestry Script Specification
> 3.0//EN"
> "http://tapestry.apache.org/dtd/Script_3_0.dtd";>
> <script>
> <input-symbol key="component" required="yes" />
>
> <initialization>
> <if expression="component.hidden">
> if (helpBalloonPlaceHolder) {
> helpBalloonPlaceHolder.hide();
> /*
> * remove the help balloon dialog from the balloon and put it
> back
> * under the helpBalloonUpdateArea (which is not visible)
> */
> var helpBalloonDialog =
> document.getElementById('${component.clientId}');
> helpBalloonDialog.parentNode.removeChild(helpBalloonDialog);
>
> document.getElementById('helpBalloonUpdateArea').appendChild(helpBalloonDialog);
> helpBalloonPlaceHolder = null;
> }
> </if>
> <if-not expression="component.hidden">
> /*
> * The help balloon object will move the component from the
> * helpBalloonUpdateArea to under its own element hierarchy,
> * when we hide the balloon we move it back again, see above.
> */
> helpBalloonPlaceHolder = new HelpBalloon({
> title: "${component.title}",
> content: '${component.clientId}',
> icon:
> document.getElementById('${component.iconElementId}'),
> returnElement: true,
> anchorPosition: 'top right'
> });
> helpBalloonPlaceHolder.show();
> </if-not>
> </initialization>
> </script>
>
>
> On Oct 24, 2009, at 16:21 , Andreas Andreou wrote:
>
>> I can't really see what's going on.. is it possible to include the
>> exception and/or
>> some related code?
>>
>> On Sat, Oct 24, 2009 at 2:44 PM, Marc van Kempen <m...@bowtie.nl> wrote:
>>>
>>> Hi,
>>>
>>> I have copied and changed the Dialog component in my project (Tapestry
>>> 4.1.5) in order to create a HelpBalloon popup. This gives me the
>>> following
>>> files that I've added to my project:
>>>
>>> HelpBalloonDialog.java
>>> HelpBalloonDialog.jwc
>>> HelpBalloonDialog.script
>>>
>>> I kept the condition checking the same as in Dialog.script, i.e.:
>>>
>>> <script>
>>> <input-symbol key="component" required="yes" />
>>>
>>> <initialization>
>>> <if expression="component.hidden">
>>> do_stuff();
>>> </if>
>>> <if-not expression="component.hidden">
>>> do_different_stuff();
>>> </if-not>
>>> </initialization>
>>> </script>
>>>
>>> This is essentially the same construction as Dialog.script uses, and most
>>> importantly the expression string "component.hidden" is exactly the same.
>>> Requesting a page however where Dialog is used gives me a cast exception
>>> when it tries to use the cached compiled expression that it finds.
>>> Changing
>>> the name "component" to something else makes the problem go away.
>>>
>>> Now, looking at the code I'm seeing the following:
>>>
>>> The ExpressionCache uses the symbol map in ScriptSessionImpl as its key,
>>> so
>>> therefore the cache should be local to a script and I should be allowed
>>> to
>>> use the same expression in different scripts.
>>>
>>> Is this the intended behaviour, am I missing something or am I looking at
>>> a
>>> bug?
>>>
>>> Kind regards,
>>> Marc van Kempen.
>>>
>>>
>>>
>>
>>
>>
>> --
>> Andreas Andreou - andy...@apache.org - http://blog.andyhot.gr
>> Tapestry / Tacos developer
>> Open Source / JEE Consulting
>>
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>>
>
>
--
Andreas Andreou - andy...@apache.org - http://blog.andyhot.gr
Tapestry / Tacos developer
Open Source / JEE Consulting
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