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https://issues.jboss.org/browse/RF-12257?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12693691#comment-12693691
]
Bernard Labno edited comment on RF-12257 at 5/17/12 10:32 AM:
--------------------------------------------------------------
This is how we defined listener in 3.x:
{code:xml}
<listener>
<name>itemSelectListener</name>
<property existintag="true" exist="true" el="true" elonly="true">
<name>binding</name>
<classname>org.richfaces.scheduleItemSelectListener</classname>
<description>The attribute takes a value-binding expression for a
component property of
a backing bean
</description>
</property>
<listenerclass>
org.richfaces.component.event.ScheduleItemSelectListener
</listenerclass>
<componentclass>
org.richfaces.component.event.ScheduleListenerEventsProducer
</componentclass>
<eventclass>
org.richfaces.component.event.ScheduleItemSelectEvent
</eventclass>
<taghandler generate="true">
<classname>
org.richfaces.taglib.ScheduleItemSelectListenerTagHandler
</classname>
</taghandler>
<tag generate="true">
<classname>
org.richfaces.taglib.ItemSelectListenerTag
</classname>
</tag>
<property existintag="true" exist="true" el="false">
<name>type</name>
<classname>java.lang.String</classname>
<description>The fully qualified Java class name for the
listener</description>
</property>
</listener>{code}
This would result in following output:
{code:xml|title=Part of schedule.tld}
<tag>
<name>itemSelectListener</name>
<tag-class>org.richfaces.taglib.ItemSelectListenerTag</tag-class>
<body-content>JSP</body-content>
<attribute>
<description>The attribute takes a value-binding expression for a
component property of
a backing bean
</description>
<name>binding</name>
<deferred-value>
<type>org.richfaces.scheduleItemSelectListener</type>
</deferred-value>
</attribute>
<attribute>
<description>The fully qualified Java class name for the
listener</description>
<name>type</name>
<rtexprvalue>false</rtexprvalue>
<type>java.lang.String</type>
</attribute>
</tag>{code}
{code:xml|title=Part of schedule.taglib.xml}
<tag>
<tag-name>itemSelectListener</tag-name>
<handler-class>
org.richfaces.taglib.ScheduleItemSelectListenerTagHandler
</handler-class>
</tag>{code}
{code:java|title=ItemSelectListenerTag.java}
public class ItemSelectListenerTag extends TagSupport {
private static final long serialVersionUID = -274448680242671987L;
private String type;
private String binding;
// Fields
public int doStartTag() throws JspException {
UIComponentTag parentTag = UIComponentTag
.getParentUIComponentTag(pageContext);
if (parentTag == null) {
throw new JspException(Messages.getMessage(
Messages.NO_UI_COMPONENT_TAG_ANCESTOR_ERROR, this
.getClass().getName()));
}
if (type == null && binding == null) {
throw new JspException("Either of the following
attributes is "
+ "required: type binding");
}
// Process only newly created components
if (parentTag.getCreated()) {
FacesContext context =
FacesContext.getCurrentInstance();
Application application = context.getApplication();
org.richfaces.component.event.ScheduleItemSelectListener listener = null;
UIComponent component =
parentTag.getComponentInstance();
// First try to access listener binding
if (binding != null) {
ValueBinding valueBinding = application
.createValueBinding(binding);
try {
listener =
(org.richfaces.component.event.ScheduleItemSelectListener) valueBinding
.getValue(context);
} catch (EvaluationException e) {
throw new JspException(e);
}
}
// Then try to instantiate it by type attribute
if (listener == null) {
String className = null;
if (UIComponentTag.isValueReference(type)) {
try {
className = (String)
application.createValueBinding(
type).getValue(context);
} catch (EvaluationException e) {
throw new JspException(e);
}
} else {
className = type;
}
if (className == null) {
throw new JspException("Type attribute
resolved to null.");
}
try {
listener =
(org.richfaces.component.event.ScheduleItemSelectListener)
Class.forName(className)
.newInstance();
} catch (Exception e) {
throw new
JspException(Messages.getMessage(
Messages.INSTANTIATE_LISTENER_ERROR, className,
component.getId()), e);
}
}
// If listener was found/created, append it to component
if (listener != null) {
((org.richfaces.component.event.ScheduleListenerEventsProducer) component)
.addItemSelectListener(listener);
}
}
return SKIP_BODY;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getBinding() {
return binding;
}
public void setBinding(String binding) {
this.binding = binding;
}
public void release() {
type = null;
binding = null;
}
}{code}
{code:java|title=ScheduleItemSelectListenerTagHandler.java}
public class ScheduleItemSelectListenerTagHandler extends TagHandler {
private Class listenerType;
private final TagAttribute type;
private final TagAttribute binding;
public ScheduleItemSelectListenerTagHandler(TagConfig config) {
super(config);
this.binding = this.getAttribute("binding");
this.type = this.getAttribute("type");
if (type != null) {
if (!type.isLiteral()) {
throw new TagAttributeException(this.tag, this.type, "Must be
literal");
}
try {
this.listenerType = Class.forName(type.getValue());
} catch (Exception e) {
throw new TagAttributeException(this.tag, this.type, e);
}
}
}
public void apply(FaceletContext ctx, UIComponent parent)
throws IOException, FacesException, FaceletException, ELException {
if (parent instanceof
org.richfaces.component.event.ScheduleListenerEventsProducer) {
// only process if parent was just created
if (parent.getParent() == null) {
org.richfaces.component.event.ScheduleListenerEventsProducer
src = (org.richfaces.component.event.ScheduleListenerEventsProducer) parent;
org.richfaces.component.event.ScheduleItemSelectListener
listener = null;
ValueExpression ve = null;
if (this.binding != null) {
ve = this.binding.getValueExpression(ctx,
org.richfaces.component.event.ScheduleItemSelectListener.class);
listener =
(org.richfaces.component.event.ScheduleItemSelectListener) ve.getValue(ctx);
}
if (listener == null) {
try {
listener =
(org.richfaces.component.event.ScheduleItemSelectListener)
listenerType.newInstance();
} catch (Exception e) {
throw new TagAttributeException(this.tag, this.type,
e.getCause());
}
if (ve != null) {
ve.setValue(ctx, ve);
}
}
src.addItemSelectListener(listener);
}
} else {
throw new TagException(this.tag,
"Parent is not of type
org.richfaces.component.event.ScheduleListenerEventsProducer, type is: " +
parent);
}
}
}{code}
was (Author: blabno):
This is how we defined listener in 3.x:
<listener>
<name>itemSelectListener</name>
<property existintag="true" exist="true" el="true" elonly="true">
<name>binding</name>
<classname>org.richfaces.scheduleItemSelectListener</classname>
<description>The attribute takes a value-binding expression for a
component property of
a backing bean
</description>
</property>
<listenerclass>
org.richfaces.component.event.ScheduleItemSelectListener
</listenerclass>
<componentclass>
org.richfaces.component.event.ScheduleListenerEventsProducer
</componentclass>
<eventclass>
org.richfaces.component.event.ScheduleItemSelectEvent
</eventclass>
<taghandler generate="true">
<classname>
org.richfaces.taglib.ScheduleItemSelectListenerTagHandler
</classname>
</taghandler>
<tag generate="true">
<classname>
org.richfaces.taglib.ItemSelectListenerTag
</classname>
</tag>
<property existintag="true" exist="true" el="false">
<name>type</name>
<classname>java.lang.String</classname>
<description>The fully qualified Java class name for the
listener</description>
</property>
</listener>
This would result in following output:
{code:title:Part of schedule.tld|borderStyle=solid}
<tag>
<name>itemSelectListener</name>
<tag-class>org.richfaces.taglib.ItemSelectListenerTag</tag-class>
<body-content>JSP</body-content>
<attribute>
<description>The attribute takes a value-binding expression for a
component property of
a backing bean
</description>
<name>binding</name>
<deferred-value>
<type>org.richfaces.scheduleItemSelectListener</type>
</deferred-value>
</attribute>
<attribute>
<description>The fully qualified Java class name for the
listener</description>
<name>type</name>
<rtexprvalue>false</rtexprvalue>
<type>java.lang.String</type>
</attribute>
</tag>{code}
{code:title:Part of schedule.taglib.xml|borderStyle=solid}
<tag>
<tag-name>itemSelectListener</tag-name>
<handler-class>
org.richfaces.taglib.ScheduleItemSelectListenerTagHandler
</handler-class>
</tag>{code}
{code:title:ItemSelectListenerTag.java|borderStyle=solid}
public class ItemSelectListenerTag extends TagSupport {
private static final long serialVersionUID = -274448680242671987L;
private String type;
private String binding;
// Fields
public int doStartTag() throws JspException {
UIComponentTag parentTag = UIComponentTag
.getParentUIComponentTag(pageContext);
if (parentTag == null) {
throw new JspException(Messages.getMessage(
Messages.NO_UI_COMPONENT_TAG_ANCESTOR_ERROR, this
.getClass().getName()));
}
if (type == null && binding == null) {
throw new JspException("Either of the following
attributes is "
+ "required: type binding");
}
// Process only newly created components
if (parentTag.getCreated()) {
FacesContext context =
FacesContext.getCurrentInstance();
Application application = context.getApplication();
org.richfaces.component.event.ScheduleItemSelectListener listener = null;
UIComponent component =
parentTag.getComponentInstance();
// First try to access listener binding
if (binding != null) {
ValueBinding valueBinding = application
.createValueBinding(binding);
try {
listener =
(org.richfaces.component.event.ScheduleItemSelectListener) valueBinding
.getValue(context);
} catch (EvaluationException e) {
throw new JspException(e);
}
}
// Then try to instantiate it by type attribute
if (listener == null) {
String className = null;
if (UIComponentTag.isValueReference(type)) {
try {
className = (String)
application.createValueBinding(
type).getValue(context);
} catch (EvaluationException e) {
throw new JspException(e);
}
} else {
className = type;
}
if (className == null) {
throw new JspException("Type attribute
resolved to null.");
}
try {
listener =
(org.richfaces.component.event.ScheduleItemSelectListener)
Class.forName(className)
.newInstance();
} catch (Exception e) {
throw new
JspException(Messages.getMessage(
Messages.INSTANTIATE_LISTENER_ERROR, className,
component.getId()), e);
}
}
// If listener was found/created, append it to component
if (listener != null) {
((org.richfaces.component.event.ScheduleListenerEventsProducer) component)
.addItemSelectListener(listener);
}
}
return SKIP_BODY;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getBinding() {
return binding;
}
public void setBinding(String binding) {
this.binding = binding;
}
public void release() {
type = null;
binding = null;
}
}{code}
{code:title=ScheduleItemSelectListenerTagHandler.java|borderStyle=solid}
public class ScheduleItemSelectListenerTagHandler extends TagHandler {
private Class listenerType;
private final TagAttribute type;
private final TagAttribute binding;
public ScheduleItemSelectListenerTagHandler(TagConfig config) {
super(config);
this.binding = this.getAttribute("binding");
this.type = this.getAttribute("type");
if (type != null) {
if (!type.isLiteral()) {
throw new TagAttributeException(this.tag, this.type, "Must be
literal");
}
try {
this.listenerType = Class.forName(type.getValue());
} catch (Exception e) {
throw new TagAttributeException(this.tag, this.type, e);
}
}
}
public void apply(FaceletContext ctx, UIComponent parent)
throws IOException, FacesException, FaceletException, ELException {
if (parent instanceof
org.richfaces.component.event.ScheduleListenerEventsProducer) {
// only process if parent was just created
if (parent.getParent() == null) {
org.richfaces.component.event.ScheduleListenerEventsProducer
src = (org.richfaces.component.event.ScheduleListenerEventsProducer) parent;
org.richfaces.component.event.ScheduleItemSelectListener
listener = null;
ValueExpression ve = null;
if (this.binding != null) {
ve = this.binding.getValueExpression(ctx,
org.richfaces.component.event.ScheduleItemSelectListener.class);
listener =
(org.richfaces.component.event.ScheduleItemSelectListener) ve.getValue(ctx);
}
if (listener == null) {
try {
listener =
(org.richfaces.component.event.ScheduleItemSelectListener)
listenerType.newInstance();
} catch (Exception e) {
throw new TagAttributeException(this.tag, this.type,
e.getCause());
}
if (ve != null) {
ve.setValue(ctx, ve);
}
}
src.addItemSelectListener(listener);
}
} else {
throw new TagException(this.tag,
"Parent is not of type
org.richfaces.component.event.ScheduleListenerEventsProducer, type is: " +
parent);
}
}
}{code}
> CDK: generating listener tags
> -----------------------------
>
> Key: RF-12257
> URL: https://issues.jboss.org/browse/RF-12257
> Project: RichFaces
> Issue Type: Feature Request
> Security Level: Public(Everyone can see)
> Components: cdk
> Affects Versions: 4.2.0.Final
> Reporter: Bernard Labno
> Priority: Minor
> Fix For: 4.3-Tracking
>
>
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