Unwrap CC ValueExpression?
Hi,
is it possible unwrap a CC ValueExpresion?
i found a bug with PrimeFaces p:media inside a composite component and i
would like to fix it.
If you pass the EL via a CC attr (e.g. #{myController.content}) and attach
it to p:media (e.g. #{cc.attrs.content}),
p:media gets the ValueExpression and saves them in the session, to later
stream the content in a resource request.
Later the ResourceHandler evaluates it and tries to get the value of
#{cc.attrs.content}, which can't work ofc.
So is it possible to extract the real EL before store it in the session?
Is there a solution which also works in mojarra?
Regards,
Thomas
Re: Unwrap CC ValueExpression?
Hello Thomas,
I think this is doable. Can you send us your composite component code?
___
Kito D. Mann | @kito99 | Author, JSF in Action
Virtua, Inc. | http://www.virtua.com | JSF/Java EE training and consulting
http://www.JSFCentral.com - JavaServer Faces FAQ, news, and info |
@jsfcentral
+1 203-998-0403
* JSF2 in Action Course - 6/17 - London:
http://skillsmatter.com/course/home/jsf-and-ajax/ng-6708
* Listen to the Enterprise Java Newscast: *
http://blogs.jsfcentral.com/JSFNewscast/
*
* JSFCentral Interviews Podcast:
http://www.jsfcentral.com/resources/jsfcentralpodcasts/
* Sign up for the JSFCentral Newsletter: http://oi.vresp.com/?fid=ac048d0e17
On Mon, May 13, 2013 at 7:17 AM, Thomas Andraschko
andraschko.tho...@gmail.com wrote:
Hi,
is it possible unwrap a CC ValueExpresion?
i found a bug with PrimeFaces p:media inside a composite component and i
would like to fix it.
If you pass the EL via a CC attr (e.g. #{myController.content}) and attach
it to p:media (e.g. #{cc.attrs.content}),
p:media gets the ValueExpression and saves them in the session, to later
stream the content in a resource request.
Later the ResourceHandler evaluates it and tries to get the value of
#{cc.attrs.content}, which can't work ofc.
So is it possible to extract the real EL before store it in the session?
Is there a solution which also works in mojarra?
Regards,
Thomas
Re: Unwrap CC ValueExpression?
Hi Kito,
CC:
composite:interface
composite:attribute name=pdfStream
type=org.primefaces.model.StreamedContent required=true /
/composite:interface
composite:implementation
p:media value=#{cc.attrs.pdfStream} width=100% height=600px
player=pdf/
/composite:implementation
View:
cc:myCC pdfStream=#{reportController.report} /
PF receives the Expression String via:
media.getValueExpression(value).getExpressionString();
If it should work inside a CC, we must receive #{cc.attrs.pdfStream}
instead of #{cc.attrs.pdfStream}.
How can get the real expression here?
Thanks,
Thomas
2013/5/13 Kito Mann kito.m...@virtua.com
Hello Thomas,
I think this is doable. Can you send us your composite component code?
___
Kito D. Mann | @kito99 | Author, JSF in Action
Virtua, Inc. | http://www.virtua.com | JSF/Java EE training and consulting
http://www.JSFCentral.com - JavaServer Faces FAQ, news, and info |
@jsfcentral
+1 203-998-0403
* JSF2 in Action Course - 6/17 - London:
http://skillsmatter.com/course/home/jsf-and-ajax/ng-6708
* Listen to the Enterprise Java Newscast: *
http://blogs.jsfcentral.com/JSFNewscast/
*
* JSFCentral Interviews Podcast:
http://www.jsfcentral.com/resources/jsfcentralpodcasts/
* Sign up for the JSFCentral Newsletter:
http://oi.vresp.com/?fid=ac048d0e17
On Mon, May 13, 2013 at 7:17 AM, Thomas Andraschko
andraschko.tho...@gmail.com wrote:
Hi,
is it possible unwrap a CC ValueExpresion?
i found a bug with PrimeFaces p:media inside a composite component and i
would like to fix it.
If you pass the EL via a CC attr (e.g. #{myController.content}) and
attach
it to p:media (e.g. #{cc.attrs.content}),
p:media gets the ValueExpression and saves them in the session, to later
stream the content in a resource request.
Later the ResourceHandler evaluates it and tries to get the value of
#{cc.attrs.content}, which can't work ofc.
So is it possible to extract the real EL before store it in the
session?
Is there a solution which also works in mojarra?
Regards,
Thomas
Re: Unwrap CC ValueExpression?
I'd rather say this should be fixed by restoring the view before accessing
the expression. I have done something like that for
DynamicContentResourceHandler which probably is used in this case here too.
Basically you need to save the viewId and the expression together in the
session so you are able to restore the adequate expression in the resource
handler. I did the following for GraphicImageRenderer:
@Override
protected String getImageSrc(FacesContext context, GraphicImage image) {
String src = null;
String name = image.getName();
if(name != null) {
String libName = image.getLibrary();
ResourceHandler handler =
context.getApplication().getResourceHandler();
Resource res = handler.createResource(name, libName);
if(res == null) {
return RES_NOT_FOUND;
} else {
return
context.getExternalContext().encodeResourceURL(res.getRequestPath());
}
} else {
Object value = image.getValue();
if (value == null) {
return ;
} else if(value instanceof String) {
src = getResourceURL(context, (String) value);
} else if (value instanceof StreamedContent) {
ViewHandler viewHandler =
context.getApplication().getViewHandler();
StreamedContent streamedContent = (StreamedContent) value;
Resource resource =
context.getApplication().getResourceHandler().createResource(dynamiccontent,
primefaces, streamedContent.getContentType());
String resourcePath = resource.getRequestPath();
// servlet path/prefix is added already in
ViewHandler.getActionURL so remove it here
resourcePath =
resourcePath.substring(resourcePath.indexOf(/javax.faces.resource/));
resourcePath = viewHandler.getActionURL(context,
resourcePath);
String rid = createUniqueContentId(context);
StringBuilder builder = new StringBuilder(resourcePath);
if(resourcePath.contains(?))
builder.append();
else
builder.append(?);
builder.append(DynamicContentResourceHandler.DYNAMIC_CONTENT_PARAM).append(=).append(rid);
builder.append().append(ln=primefaces);
for (UIComponent kid : image.getChildren()) {
if (kid instanceof UIParameter) {
UIParameter param = (UIParameter) kid;
builder.append().append(param.getName()).append(=).append(param.getValue());
}
}
src = builder.toString();
MapString, String dynamicContentMap = new HashMapString,
String();
dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY,
image.getValueExpression(value).getExpressionString());
dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VIEW_ID_KEY,
context.getViewRoot().getViewId());
context.getExternalContext().getSessionMap().put(rid,
dynamicContentMap);
}
// Add caching if needed
if (!image.isCache()) {
src += src.contains(?) ? : ?;
src = src + primefaces_image= +
UUID.randomUUID().toString();
}
}
return src;
}
And then I have the DynamicContentResourceHandler:
public class DynamicContentResourceHandler extends PrimeResourceHandler{
private final static Logger logger =
Logger.getLogger(DynamicContentResourceHandler.class.getName());
public static final String DYNAMIC_CONTENT_VIEW_ID_KEY = viewId;
public static final String DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY =
valueExpression;
public static final String DYNAMIC_CONTENT_PARAM = pfdrid;
public DynamicContentResourceHandler(ResourceHandler wrapped) {
super(wrapped);
}
@Override
public void handleResourceRequest(FacesContext context) throws
IOException {
MapString,String params =
context.getExternalContext().getRequestParameterMap();
String library = params.get(ln);
String dynamicContentId = params.get(DYNAMIC_CONTENT_PARAM);
if(dynamicContentId != null library != null
library.equals(primefaces)) {
MapString,Object session =
context.getExternalContext().getSessionMap();
StreamedContent content = null;
try {
@SuppressWarnings(unchecked)
MapString, String dynamicContentMap = (MapString,
String) session.get(dynamicContentId);
if(dynamicContentMap != null){
String viewId =
dynamicContentMap.get(DYNAMIC_CONTENT_VIEW_ID_KEY);
String dynamicContentEL =
dynamicContentMap.get(DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY);
// Workaround for view based scopes
Re: Unwrap CC ValueExpression?
Hi Christian,
i don't understand your solution exactly.
Whats the difference?
It would still store the #{cc.attrs.xxx} expression and #{cc} cant be
evaluated without #pushComponentToEL(cc).
Also #createView should be avoided for such a request IMO because of
performance.
Regards,
Thomas
2013/5/13 Christian Beikov christian.bei...@gmail.com
I'd rather say this should be fixed by restoring the view before accessing
the expression. I have done something like that for
DynamicContentResourceHandler which probably is used in this case here too.
Basically you need to save the viewId and the expression together in the
session so you are able to restore the adequate expression in the resource
handler. I did the following for GraphicImageRenderer:
@Override
protected String getImageSrc(FacesContext context, GraphicImage image)
{
String src = null;
String name = image.getName();
if(name != null) {
String libName = image.getLibrary();
ResourceHandler handler =
context.getApplication().getResourceHandler();
Resource res = handler.createResource(name, libName);
if(res == null) {
return RES_NOT_FOUND;
} else {
return
context.getExternalContext().encodeResourceURL(res.getRequestPath());
}
} else {
Object value = image.getValue();
if (value == null) {
return ;
} else if(value instanceof String) {
src = getResourceURL(context, (String) value);
} else if (value instanceof StreamedContent) {
ViewHandler viewHandler =
context.getApplication().getViewHandler();
StreamedContent streamedContent = (StreamedContent) value;
Resource resource =
context.getApplication().getResourceHandler().createResource(dynamiccontent,
primefaces, streamedContent.getContentType());
String resourcePath = resource.getRequestPath();
// servlet path/prefix is added already in
ViewHandler.getActionURL so remove it here
resourcePath =
resourcePath.substring(resourcePath.indexOf(/javax.faces.resource/));
resourcePath = viewHandler.getActionURL(context,
resourcePath);
String rid = createUniqueContentId(context);
StringBuilder builder = new StringBuilder(resourcePath);
if(resourcePath.contains(?))
builder.append();
else
builder.append(?);
builder.append(DynamicContentResourceHandler.DYNAMIC_CONTENT_PARAM).append(=).append(rid);
builder.append().append(ln=primefaces);
for (UIComponent kid : image.getChildren()) {
if (kid instanceof UIParameter) {
UIParameter param = (UIParameter) kid;
builder.append().append(param.getName()).append(=).append(param.getValue());
}
}
src = builder.toString();
MapString, String dynamicContentMap = new HashMapString,
String();
dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY,
image.getValueExpression(value).getExpressionString());
dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VIEW_ID_KEY,
context.getViewRoot().getViewId());
context.getExternalContext().getSessionMap().put(rid,
dynamicContentMap);
}
// Add caching if needed
if (!image.isCache()) {
src += src.contains(?) ? : ?;
src = src + primefaces_image= +
UUID.randomUUID().toString();
}
}
return src;
}
And then I have the DynamicContentResourceHandler:
public class DynamicContentResourceHandler extends PrimeResourceHandler{
private final static Logger logger =
Logger.getLogger(DynamicContentResourceHandler.class.getName());
public static final String DYNAMIC_CONTENT_VIEW_ID_KEY = viewId;
public static final String DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY =
valueExpression;
public static final String DYNAMIC_CONTENT_PARAM = pfdrid;
public DynamicContentResourceHandler(ResourceHandler wrapped) {
super(wrapped);
}
@Override
public void handleResourceRequest(FacesContext context) throws
IOException {
MapString,String params =
context.getExternalContext().getRequestParameterMap();
String library = params.get(ln);
String dynamicContentId = params.get(DYNAMIC_CONTENT_PARAM);
if(dynamicContentId != null library != null
library.equals(primefaces)) {
MapString,Object session =
context.getExternalContext().getSessionMap();
StreamedContent content = null;
try {
Re: Unwrap CC ValueExpression?
The difference is that it can handle the view based scopes where the
primefaces impl can't. But as I just realize this won't help you at all.
Sorry but for now I can't think of a reliable general purpose way to
retrieve the contents without rebuilding the view, I have to think about it.
Do you need any context information like iteration status or so to evaluate
the expression to a meaningful value or is it completely independent of the
view?
What scope has the myController?
2013/5/13 Thomas Andraschko andraschko.tho...@gmail.com
Hi Christian,
i don't understand your solution exactly.
Whats the difference?
It would still store the #{cc.attrs.xxx} expression and #{cc} cant be
evaluated without #pushComponentToEL(cc).
Also #createView should be avoided for such a request IMO because of
performance.
Regards,
Thomas
2013/5/13 Christian Beikov christian.bei...@gmail.com
I'd rather say this should be fixed by restoring the view before
accessing
the expression. I have done something like that for
DynamicContentResourceHandler which probably is used in this case here
too.
Basically you need to save the viewId and the expression together in the
session so you are able to restore the adequate expression in the
resource
handler. I did the following for GraphicImageRenderer:
@Override
protected String getImageSrc(FacesContext context, GraphicImage
image)
{
String src = null;
String name = image.getName();
if(name != null) {
String libName = image.getLibrary();
ResourceHandler handler =
context.getApplication().getResourceHandler();
Resource res = handler.createResource(name, libName);
if(res == null) {
return RES_NOT_FOUND;
} else {
return
context.getExternalContext().encodeResourceURL(res.getRequestPath());
}
} else {
Object value = image.getValue();
if (value == null) {
return ;
} else if(value instanceof String) {
src = getResourceURL(context, (String) value);
} else if (value instanceof StreamedContent) {
ViewHandler viewHandler =
context.getApplication().getViewHandler();
StreamedContent streamedContent = (StreamedContent)
value;
Resource resource =
context.getApplication().getResourceHandler().createResource(dynamiccontent,
primefaces, streamedContent.getContentType());
String resourcePath = resource.getRequestPath();
// servlet path/prefix is added already in
ViewHandler.getActionURL so remove it here
resourcePath =
resourcePath.substring(resourcePath.indexOf(/javax.faces.resource/));
resourcePath = viewHandler.getActionURL(context,
resourcePath);
String rid = createUniqueContentId(context);
StringBuilder builder = new StringBuilder(resourcePath);
if(resourcePath.contains(?))
builder.append();
else
builder.append(?);
builder.append(DynamicContentResourceHandler.DYNAMIC_CONTENT_PARAM).append(=).append(rid);
builder.append().append(ln=primefaces);
for (UIComponent kid : image.getChildren()) {
if (kid instanceof UIParameter) {
UIParameter param = (UIParameter) kid;
builder.append().append(param.getName()).append(=).append(param.getValue());
}
}
src = builder.toString();
MapString, String dynamicContentMap = new
HashMapString,
String();
dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY,
image.getValueExpression(value).getExpressionString());
dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VIEW_ID_KEY,
context.getViewRoot().getViewId());
context.getExternalContext().getSessionMap().put(rid,
dynamicContentMap);
}
// Add caching if needed
if (!image.isCache()) {
src += src.contains(?) ? : ?;
src = src + primefaces_image= +
UUID.randomUUID().toString();
}
}
return src;
}
And then I have the DynamicContentResourceHandler:
public class DynamicContentResourceHandler extends PrimeResourceHandler{
private final static Logger logger =
Logger.getLogger(DynamicContentResourceHandler.class.getName());
public static final String DYNAMIC_CONTENT_VIEW_ID_KEY = viewId;
public static final String DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY =
valueExpression;
public static final String DYNAMIC_CONTENT_PARAM = pfdrid;
Re: Unwrap CC ValueExpression?
It's really view independent and my Controller is RequestScoped.
The only problem is that currently graphicImage/media/filedownload are
unusable in a CC, if you need to pass the EL into the CC.
2013/5/13 Christian Beikov christian.bei...@gmail.com
The difference is that it can handle the view based scopes where the
primefaces impl can't. But as I just realize this won't help you at all.
Sorry but for now I can't think of a reliable general purpose way to
retrieve the contents without rebuilding the view, I have to think about
it.
Do you need any context information like iteration status or so to evaluate
the expression to a meaningful value or is it completely independent of the
view?
What scope has the myController?
2013/5/13 Thomas Andraschko andraschko.tho...@gmail.com
Hi Christian,
i don't understand your solution exactly.
Whats the difference?
It would still store the #{cc.attrs.xxx} expression and #{cc} cant be
evaluated without #pushComponentToEL(cc).
Also #createView should be avoided for such a request IMO because of
performance.
Regards,
Thomas
2013/5/13 Christian Beikov christian.bei...@gmail.com
I'd rather say this should be fixed by restoring the view before
accessing
the expression. I have done something like that for
DynamicContentResourceHandler which probably is used in this case here
too.
Basically you need to save the viewId and the expression together in
the
session so you are able to restore the adequate expression in the
resource
handler. I did the following for GraphicImageRenderer:
@Override
protected String getImageSrc(FacesContext context, GraphicImage
image)
{
String src = null;
String name = image.getName();
if(name != null) {
String libName = image.getLibrary();
ResourceHandler handler =
context.getApplication().getResourceHandler();
Resource res = handler.createResource(name, libName);
if(res == null) {
return RES_NOT_FOUND;
} else {
return
context.getExternalContext().encodeResourceURL(res.getRequestPath());
}
} else {
Object value = image.getValue();
if (value == null) {
return ;
} else if(value instanceof String) {
src = getResourceURL(context, (String) value);
} else if (value instanceof StreamedContent) {
ViewHandler viewHandler =
context.getApplication().getViewHandler();
StreamedContent streamedContent = (StreamedContent)
value;
Resource resource =
context.getApplication().getResourceHandler().createResource(dynamiccontent,
primefaces, streamedContent.getContentType());
String resourcePath = resource.getRequestPath();
// servlet path/prefix is added already in
ViewHandler.getActionURL so remove it here
resourcePath =
resourcePath.substring(resourcePath.indexOf(/javax.faces.resource/));
resourcePath = viewHandler.getActionURL(context,
resourcePath);
String rid = createUniqueContentId(context);
StringBuilder builder = new
StringBuilder(resourcePath);
if(resourcePath.contains(?))
builder.append();
else
builder.append(?);
builder.append(DynamicContentResourceHandler.DYNAMIC_CONTENT_PARAM).append(=).append(rid);
builder.append().append(ln=primefaces);
for (UIComponent kid : image.getChildren()) {
if (kid instanceof UIParameter) {
UIParameter param = (UIParameter) kid;
builder.append().append(param.getName()).append(=).append(param.getValue());
}
}
src = builder.toString();
MapString, String dynamicContentMap = new
HashMapString,
String();
dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY,
image.getValueExpression(value).getExpressionString());
dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VIEW_ID_KEY,
context.getViewRoot().getViewId());
context.getExternalContext().getSessionMap().put(rid,
dynamicContentMap);
}
// Add caching if needed
if (!image.isCache()) {
src += src.contains(?) ? : ?;
src = src + primefaces_image= +
UUID.randomUUID().toString();
}
}
return src;
}
And then I have the DynamicContentResourceHandler:
public class
Re: Unwrap CC ValueExpression?
What PF version are you using?
2013/5/13 Thomas Andraschko andraschko.tho...@gmail.com
It's really view independent and my Controller is RequestScoped.
The only problem is that currently graphicImage/media/filedownload are
unusable in a CC, if you need to pass the EL into the CC.
2013/5/13 Christian Beikov christian.bei...@gmail.com
The difference is that it can handle the view based scopes where the
primefaces impl can't. But as I just realize this won't help you at all.
Sorry but for now I can't think of a reliable general purpose way to
retrieve the contents without rebuilding the view, I have to think about
it.
Do you need any context information like iteration status or so to
evaluate
the expression to a meaningful value or is it completely independent of
the
view?
What scope has the myController?
2013/5/13 Thomas Andraschko andraschko.tho...@gmail.com
Hi Christian,
i don't understand your solution exactly.
Whats the difference?
It would still store the #{cc.attrs.xxx} expression and #{cc} cant be
evaluated without #pushComponentToEL(cc).
Also #createView should be avoided for such a request IMO because of
performance.
Regards,
Thomas
2013/5/13 Christian Beikov christian.bei...@gmail.com
I'd rather say this should be fixed by restoring the view before
accessing
the expression. I have done something like that for
DynamicContentResourceHandler which probably is used in this case
here
too.
Basically you need to save the viewId and the expression together in
the
session so you are able to restore the adequate expression in the
resource
handler. I did the following for GraphicImageRenderer:
@Override
protected String getImageSrc(FacesContext context, GraphicImage
image)
{
String src = null;
String name = image.getName();
if(name != null) {
String libName = image.getLibrary();
ResourceHandler handler =
context.getApplication().getResourceHandler();
Resource res = handler.createResource(name, libName);
if(res == null) {
return RES_NOT_FOUND;
} else {
return
context.getExternalContext().encodeResourceURL(res.getRequestPath());
}
} else {
Object value = image.getValue();
if (value == null) {
return ;
} else if(value instanceof String) {
src = getResourceURL(context, (String) value);
} else if (value instanceof StreamedContent) {
ViewHandler viewHandler =
context.getApplication().getViewHandler();
StreamedContent streamedContent = (StreamedContent)
value;
Resource resource =
context.getApplication().getResourceHandler().createResource(dynamiccontent,
primefaces, streamedContent.getContentType());
String resourcePath = resource.getRequestPath();
// servlet path/prefix is added already in
ViewHandler.getActionURL so remove it here
resourcePath =
resourcePath.substring(resourcePath.indexOf(/javax.faces.resource/));
resourcePath = viewHandler.getActionURL(context,
resourcePath);
String rid = createUniqueContentId(context);
StringBuilder builder = new
StringBuilder(resourcePath);
if(resourcePath.contains(?))
builder.append();
else
builder.append(?);
builder.append(DynamicContentResourceHandler.DYNAMIC_CONTENT_PARAM).append(=).append(rid);
builder.append().append(ln=primefaces);
for (UIComponent kid : image.getChildren()) {
if (kid instanceof UIParameter) {
UIParameter param = (UIParameter) kid;
builder.append().append(param.getName()).append(=).append(param.getValue());
}
}
src = builder.toString();
MapString, String dynamicContentMap = new
HashMapString,
String();
dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY,
image.getValueExpression(value).getExpressionString());
dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VIEW_ID_KEY,
context.getViewRoot().getViewId());
context.getExternalContext().getSessionMap().put(rid,
dynamicContentMap);
}
// Add caching if needed
if (!image.isCache()) {
src += src.contains(?) ? :
Re: Unwrap CC ValueExpression?
3.5.4 but thats indepenent :)
2013/5/13 Christian Beikov christian.bei...@gmail.com
What PF version are you using?
2013/5/13 Thomas Andraschko andraschko.tho...@gmail.com
It's really view independent and my Controller is RequestScoped.
The only problem is that currently graphicImage/media/filedownload are
unusable in a CC, if you need to pass the EL into the CC.
2013/5/13 Christian Beikov christian.bei...@gmail.com
The difference is that it can handle the view based scopes where the
primefaces impl can't. But as I just realize this won't help you at
all.
Sorry but for now I can't think of a reliable general purpose way to
retrieve the contents without rebuilding the view, I have to think
about
it.
Do you need any context information like iteration status or so to
evaluate
the expression to a meaningful value or is it completely independent of
the
view?
What scope has the myController?
2013/5/13 Thomas Andraschko andraschko.tho...@gmail.com
Hi Christian,
i don't understand your solution exactly.
Whats the difference?
It would still store the #{cc.attrs.xxx} expression and #{cc} cant be
evaluated without #pushComponentToEL(cc).
Also #createView should be avoided for such a request IMO because of
performance.
Regards,
Thomas
2013/5/13 Christian Beikov christian.bei...@gmail.com
I'd rather say this should be fixed by restoring the view before
accessing
the expression. I have done something like that for
DynamicContentResourceHandler which probably is used in this case
here
too.
Basically you need to save the viewId and the expression together
in
the
session so you are able to restore the adequate expression in the
resource
handler. I did the following for GraphicImageRenderer:
@Override
protected String getImageSrc(FacesContext context, GraphicImage
image)
{
String src = null;
String name = image.getName();
if(name != null) {
String libName = image.getLibrary();
ResourceHandler handler =
context.getApplication().getResourceHandler();
Resource res = handler.createResource(name, libName);
if(res == null) {
return RES_NOT_FOUND;
} else {
return
context.getExternalContext().encodeResourceURL(res.getRequestPath());
}
} else {
Object value = image.getValue();
if (value == null) {
return ;
} else if(value instanceof String) {
src = getResourceURL(context, (String) value);
} else if (value instanceof StreamedContent) {
ViewHandler viewHandler =
context.getApplication().getViewHandler();
StreamedContent streamedContent = (StreamedContent)
value;
Resource resource =
context.getApplication().getResourceHandler().createResource(dynamiccontent,
primefaces, streamedContent.getContentType());
String resourcePath = resource.getRequestPath();
// servlet path/prefix is added already in
ViewHandler.getActionURL so remove it here
resourcePath =
resourcePath.substring(resourcePath.indexOf(/javax.faces.resource/));
resourcePath = viewHandler.getActionURL(context,
resourcePath);
String rid = createUniqueContentId(context);
StringBuilder builder = new
StringBuilder(resourcePath);
if(resourcePath.contains(?))
builder.append();
else
builder.append(?);
builder.append(DynamicContentResourceHandler.DYNAMIC_CONTENT_PARAM).append(=).append(rid);
builder.append().append(ln=primefaces);
for (UIComponent kid : image.getChildren()) {
if (kid instanceof UIParameter) {
UIParameter param = (UIParameter) kid;
builder.append().append(param.getName()).append(=).append(param.getValue());
}
}
src = builder.toString();
MapString, String dynamicContentMap = new
HashMapString,
String();
dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY,
image.getValueExpression(value).getExpressionString());
dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VIEW_ID_KEY,
context.getViewRoot().getViewId());
Re: Unwrap CC ValueExpression?
I believe it would be possible to solve it with -
1) check if current component (media etc.) is inside a CC
2) get the CC
3) check if expressionString contains .attrs. and extract the attribute
name
4) get the expression via the CC#getAttributes(attributeName)
But don't know if it works in all cases.
Maybe there exists a better and cleaner solution?
2013/5/13 Thomas Andraschko andraschko.tho...@gmail.com
3.5.4 but thats indepenent :)
2013/5/13 Christian Beikov christian.bei...@gmail.com
What PF version are you using?
2013/5/13 Thomas Andraschko andraschko.tho...@gmail.com
It's really view independent and my Controller is RequestScoped.
The only problem is that currently graphicImage/media/filedownload are
unusable in a CC, if you need to pass the EL into the CC.
2013/5/13 Christian Beikov christian.bei...@gmail.com
The difference is that it can handle the view based scopes where the
primefaces impl can't. But as I just realize this won't help you at
all.
Sorry but for now I can't think of a reliable general purpose way to
retrieve the contents without rebuilding the view, I have to think
about
it.
Do you need any context information like iteration status or so to
evaluate
the expression to a meaningful value or is it completely independent
of
the
view?
What scope has the myController?
2013/5/13 Thomas Andraschko andraschko.tho...@gmail.com
Hi Christian,
i don't understand your solution exactly.
Whats the difference?
It would still store the #{cc.attrs.xxx} expression and #{cc} cant
be
evaluated without #pushComponentToEL(cc).
Also #createView should be avoided for such a request IMO because of
performance.
Regards,
Thomas
2013/5/13 Christian Beikov christian.bei...@gmail.com
I'd rather say this should be fixed by restoring the view before
accessing
the expression. I have done something like that for
DynamicContentResourceHandler which probably is used in this case
here
too.
Basically you need to save the viewId and the expression together
in
the
session so you are able to restore the adequate expression in the
resource
handler. I did the following for GraphicImageRenderer:
@Override
protected String getImageSrc(FacesContext context,
GraphicImage
image)
{
String src = null;
String name = image.getName();
if(name != null) {
String libName = image.getLibrary();
ResourceHandler handler =
context.getApplication().getResourceHandler();
Resource res = handler.createResource(name, libName);
if(res == null) {
return RES_NOT_FOUND;
} else {
return
context.getExternalContext().encodeResourceURL(res.getRequestPath());
}
} else {
Object value = image.getValue();
if (value == null) {
return ;
} else if(value instanceof String) {
src = getResourceURL(context, (String) value);
} else if (value instanceof StreamedContent) {
ViewHandler viewHandler =
context.getApplication().getViewHandler();
StreamedContent streamedContent =
(StreamedContent)
value;
Resource resource =
context.getApplication().getResourceHandler().createResource(dynamiccontent,
primefaces, streamedContent.getContentType());
String resourcePath = resource.getRequestPath();
// servlet path/prefix is added already in
ViewHandler.getActionURL so remove it here
resourcePath =
resourcePath.substring(resourcePath.indexOf(/javax.faces.resource/));
resourcePath = viewHandler.getActionURL(context,
resourcePath);
String rid = createUniqueContentId(context);
StringBuilder builder = new
StringBuilder(resourcePath);
if(resourcePath.contains(?))
builder.append();
else
builder.append(?);
builder.append(DynamicContentResourceHandler.DYNAMIC_CONTENT_PARAM).append(=).append(rid);
builder.append().append(ln=primefaces);
for (UIComponent kid : image.getChildren()) {
if (kid instanceof UIParameter) {
UIParameter param = (UIParameter) kid;
builder.append().append(param.getName()).append(=).append(param.getValue());
}
}
src = builder.toString();
Re: Unwrap CC ValueExpression?
I am not sure if that is independent. I think catagy fixed something like
this in a newer release.
Well I fixed the graphicImage thing by using the previously provided
implementation. It's costly because it has to restore the view but in the
end it works for us. We are using the graphicImage in composite components
too as far as I remember.
To overcome the filedownload problem I wrote my own
UIComponent/UINamingContainer for the composite component which wraps a
command link that uses the action listener provided by the composite
component implementation instead of using the fileDownload of PF.
I didn't use the media component before, but if the content is really
stateless why don't you provide it via something like:
#{resource['library:file']} ?
2013/5/13 Thomas Andraschko andraschko.tho...@gmail.com
3.5.4 but thats indepenent :)
2013/5/13 Christian Beikov christian.bei...@gmail.com
What PF version are you using?
2013/5/13 Thomas Andraschko andraschko.tho...@gmail.com
It's really view independent and my Controller is RequestScoped.
The only problem is that currently graphicImage/media/filedownload are
unusable in a CC, if you need to pass the EL into the CC.
2013/5/13 Christian Beikov christian.bei...@gmail.com
The difference is that it can handle the view based scopes where the
primefaces impl can't. But as I just realize this won't help you at
all.
Sorry but for now I can't think of a reliable general purpose way to
retrieve the contents without rebuilding the view, I have to think
about
it.
Do you need any context information like iteration status or so to
evaluate
the expression to a meaningful value or is it completely independent
of
the
view?
What scope has the myController?
2013/5/13 Thomas Andraschko andraschko.tho...@gmail.com
Hi Christian,
i don't understand your solution exactly.
Whats the difference?
It would still store the #{cc.attrs.xxx} expression and #{cc} cant
be
evaluated without #pushComponentToEL(cc).
Also #createView should be avoided for such a request IMO because
of
performance.
Regards,
Thomas
2013/5/13 Christian Beikov christian.bei...@gmail.com
I'd rather say this should be fixed by restoring the view before
accessing
the expression. I have done something like that for
DynamicContentResourceHandler which probably is used in this case
here
too.
Basically you need to save the viewId and the expression together
in
the
session so you are able to restore the adequate expression in the
resource
handler. I did the following for GraphicImageRenderer:
@Override
protected String getImageSrc(FacesContext context,
GraphicImage
image)
{
String src = null;
String name = image.getName();
if(name != null) {
String libName = image.getLibrary();
ResourceHandler handler =
context.getApplication().getResourceHandler();
Resource res = handler.createResource(name, libName);
if(res == null) {
return RES_NOT_FOUND;
} else {
return
context.getExternalContext().encodeResourceURL(res.getRequestPath());
}
} else {
Object value = image.getValue();
if (value == null) {
return ;
} else if(value instanceof String) {
src = getResourceURL(context, (String) value);
} else if (value instanceof StreamedContent) {
ViewHandler viewHandler =
context.getApplication().getViewHandler();
StreamedContent streamedContent =
(StreamedContent)
value;
Resource resource =
context.getApplication().getResourceHandler().createResource(dynamiccontent,
primefaces, streamedContent.getContentType());
String resourcePath = resource.getRequestPath();
// servlet path/prefix is added already in
ViewHandler.getActionURL so remove it here
resourcePath =
resourcePath.substring(resourcePath.indexOf(/javax.faces.resource/));
resourcePath = viewHandler.getActionURL(context,
resourcePath);
String rid = createUniqueContentId(context);
StringBuilder builder = new
StringBuilder(resourcePath);
if(resourcePath.contains(?))
builder.append();
else
builder.append(?);
Re: Unwrap CC ValueExpression?
I'm sure, i checked the code base :)
We generate a report on the fly for the user. It just depends on the
session data but not on view data, therefore streamedContent is actually a
nice solution.
2013/5/13 Christian Beikov christian.bei...@gmail.com
I am not sure if that is independent. I think catagy fixed something like
this in a newer release.
Well I fixed the graphicImage thing by using the previously provided
implementation. It's costly because it has to restore the view but in the
end it works for us. We are using the graphicImage in composite components
too as far as I remember.
To overcome the filedownload problem I wrote my own
UIComponent/UINamingContainer for the composite component which wraps a
command link that uses the action listener provided by the composite
component implementation instead of using the fileDownload of PF.
I didn't use the media component before, but if the content is really
stateless why don't you provide it via something like:
#{resource['library:file']} ?
2013/5/13 Thomas Andraschko andraschko.tho...@gmail.com
3.5.4 but thats indepenent :)
2013/5/13 Christian Beikov christian.bei...@gmail.com
What PF version are you using?
2013/5/13 Thomas Andraschko andraschko.tho...@gmail.com
It's really view independent and my Controller is RequestScoped.
The only problem is that currently graphicImage/media/filedownload
are
unusable in a CC, if you need to pass the EL into the CC.
2013/5/13 Christian Beikov christian.bei...@gmail.com
The difference is that it can handle the view based scopes where
the
primefaces impl can't. But as I just realize this won't help you at
all.
Sorry but for now I can't think of a reliable general purpose way
to
retrieve the contents without rebuilding the view, I have to think
about
it.
Do you need any context information like iteration status or so to
evaluate
the expression to a meaningful value or is it completely
independent
of
the
view?
What scope has the myController?
2013/5/13 Thomas Andraschko andraschko.tho...@gmail.com
Hi Christian,
i don't understand your solution exactly.
Whats the difference?
It would still store the #{cc.attrs.xxx} expression and #{cc}
cant
be
evaluated without #pushComponentToEL(cc).
Also #createView should be avoided for such a request IMO because
of
performance.
Regards,
Thomas
2013/5/13 Christian Beikov christian.bei...@gmail.com
I'd rather say this should be fixed by restoring the view
before
accessing
the expression. I have done something like that for
DynamicContentResourceHandler which probably is used in this
case
here
too.
Basically you need to save the viewId and the expression
together
in
the
session so you are able to restore the adequate expression in
the
resource
handler. I did the following for GraphicImageRenderer:
@Override
protected String getImageSrc(FacesContext context,
GraphicImage
image)
{
String src = null;
String name = image.getName();
if(name != null) {
String libName = image.getLibrary();
ResourceHandler handler =
context.getApplication().getResourceHandler();
Resource res = handler.createResource(name,
libName);
if(res == null) {
return RES_NOT_FOUND;
} else {
return
context.getExternalContext().encodeResourceURL(res.getRequestPath());
}
} else {
Object value = image.getValue();
if (value == null) {
return ;
} else if(value instanceof String) {
src = getResourceURL(context, (String) value);
} else if (value instanceof StreamedContent) {
ViewHandler viewHandler =
context.getApplication().getViewHandler();
StreamedContent streamedContent =
(StreamedContent)
value;
Resource resource =
context.getApplication().getResourceHandler().createResource(dynamiccontent,
primefaces, streamedContent.getContentType());
String resourcePath =
resource.getRequestPath();
// servlet path/prefix is added already in
ViewHandler.getActionURL so remove it here
resourcePath =
resourcePath.substring(resourcePath.indexOf(/javax.faces.resource/));
resourcePath =
viewHandler.getActionURL(context,
Re: Unwrap CC ValueExpression?
On 13/05/2013 14:35, Thomas Andraschko wrote:
Hi Christian,
i don't understand your solution exactly.
Whats the difference?
It would still store the #{cc.attrs.xxx} expression and #{cc} cant be
evaluated without #pushComponentToEL(cc).
Also #createView should be avoided for such a request IMO because of
performance.
I use the following dirty/kludgy code for such needs :
public static String getMappedValueExpression(ValueExpression
valueExpression) {
ContextAwareTagValueExpression ctxAware =
(ContextAwareTagValueExpression)valueExpression;
if(ctxAware != null) {
return
getMappedValueExpression((WrappedValueExpression)ctxAware.getWrapped());
}
return valueExpression.getExpressionString();
}
public static String
getMappedValueExpression(WrappedValueExpression wrappedExpression) {
String exprString =
wrappedExpression.getExpressionString().replace(#{, ).replace(}, );
String ret = exprString;
try {
Field valueExpression =
WrappedValueExpression.class.getDeclaredField(valueExpression);
valueExpression.setAccessible(true);
ValueExpressionImpl vei = (ValueExpressionImpl)
valueExpression.get(wrappedExpression);
Field varMapper =
ValueExpressionImpl.class.getDeclaredField(varMapper);
varMapper.setAccessible(true);
VariableMapperImpl vmi = (VariableMapperImpl)
varMapper.get(vei);
if(vmi != null) {
String[] components = exprString.split(\\.);
components[0] =
vmi.resolveVariable(components[0]).getExpressionString().replace(#{,
).replace(}, );
ret = ;
for(int i = 0 ; i components.length ; i++) {
if(i != 0) {
ret += .;
}
ret += components[i];
}
}
} catch (Exception ex) {
logger.error(Exception lors du mapping de l'expression
EL + exprString, ex);
} finally {
return ret;
}
}
I will gladly adopt a better solution but this one works for me. :-)
Regards,
Ludovic
|
| AVANT D'IMPRIMER, PENSEZ A L'ENVIRONNEMENT.
|
