Re: How to load a image dynamiclly in tapestry5.0.4
I have an image saved in the database as BLOB. I am loading this image in
memory and can access it using getUser().getPhotoImage() which returns an
object of type java.io.File. How can I display this image on a tapestry html
page using a Tapestry Asset?
Petros
Howard Lewis Ship wrote:
In order to answer this question, some background is needed.
If you know the product's id (whatever you use, where it's SKU number or
a
surrogate key) ... what is the exact process from going from that to a URL
suitable for an tag?
That is ... are the images stored in the database? Or are they on the
file
system somewhere? If they are files on the file system, are those files
mapped to a client-visible URL?
In the latter case, you can do something like:
prop:productImageURL
public String getProductImageURL() {
return http://static.myco.com/product-images/; + _productId + .gif;
}
Assigning a t:id to a tag without specifying a component type creates an
Any
component, a component that just renders whatever tag and informal
parameters you provide it. Here wer'e linking that to some Java code in
the
corresponding page or component that computes the URL of the product based
on an instance variable. Probably your example is more complicated, but
you
get the idea.
There's another approach used when the data is inside the database, but we
can dive into that if the above solution is insufficient.
Assets are useful for accessing resources inside the web application
context, or on the classpath, and includes logic related to localization
...
but it is not always appropriate when accessing resources that are well
outside the web application itself.
On 5/19/07, Allen Guo [EMAIL PROTECTED] wrote:
Hi All,
I want to show the ProductDetail page with product image. It looks like
p_001.jpg .
You know, every product has different image name,so I need to pass the
string 'p_001.jpg' to the corresponding page.
As result the img tag should look like ${product.image} or
I can use Asset to do it.
But I tried to do it using the first approach, exception occured.
And I don't know how to the second approach.
Can anyone give me an idea?
Thank in advance
Allen Guo
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
--
Howard M. Lewis Ship
TWD Consulting, Inc.
Independent J2EE / Open-Source Java Consultant
Creator and PMC Chair, Apache Tapestry
Creator, Apache HiveMind
Professional Tapestry training, mentoring, support
and project work. http://howardlewisship.com
--
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http://www.nabble.com/How-to-load-a-image-dynamiclly-in-tapestry5.0.4-tf3784430.html#a10989345
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Re: How to load a image dynamiclly in tapestry5.0.4
Sorry, I did not see your T5 requirement.
This is for T4
- Original Message -
From: Allen Guo [EMAIL PROTECTED]
To: Tapestry users users@tapestry.apache.org
Sent: Wednesday, May 23, 2007 12:01:04 PM (GMT-0500) America/New_York
Subject: Re: How to load a image dynamiclly in tapestry5.0.4
Is it from http://stitches.authsum.org/stitches/app?
But currently it seems that it's not compatible with Tapestry5
Phillip Rhodes 写道:
Just wanted to mention stitches (yet again).
Stitches consists of a spring layer over JCR (Java content repository) and
suite of components that interface to this spring layer to deal with common
types of web content (html, pdf's, images, gallerys). Lots of unit tests
exist.
There are components for searching, selecting, editing, displaying.
One cool thing is that image thumbnails are dynamically generated when you
upload the image, and all images are searchable via the jackrabbit index.
Phillip
- Original Message -
From: Allen Guo [EMAIL PROTECTED]
To: Tapestry users users@tapestry.apache.org
Sent: Wednesday, May 23, 2007 1:12:11 AM (GMT-0500) America/New_York
Subject: Re: How to load a image dynamiclly in tapestry5.0.4
But I don't think it's useful for me to organize TAPESTRY application
effectlly.
That books just represent basic programming Philosophy .
Jesse Kuhnert 写道:
+1 I picked it up after seeing Howard mentioned it and loved it. :)
On 5/22/07, Howard Lewis Ship [EMAIL PROTECTED] wrote:
The book The Pragmatic Programmer is an excellent start on learning
how
to
organize your code and your mind and work effectively,
professionally, and
pragmatically.
http://www.powells.com/biblio/65-9780201616224-0
On 5/21/07, Allen Guo [EMAIL PROTECTED] wrote:
Thanks , It's running now
But suppose there is five properties of Product is relative with image
Product class looks like
class Product{
private String _img1;
private String _img2;
private String _img3;
private String _img4;
private String _img5;
}
So for show the img, I have to define the corresponding Img url in
ProductDetai.java like
// ProductDetail.java
class ProductDetail{
private String _imgUrl1;
private String _imgUrl2;
private String _imgUrl3;
private String _imgUrl4;
private String _imgUrl5;
public String getProductImageURL1() {
return http://static.myco.com/product-images/; + _imgUrl1 + .gif;
}
public String getProductImageURL2() {
return http://static.myco.com/product-images/; + _imgUrl2 + .gif;
}
public String getProductImageURL3() {
return http://static.myco.com/product-images/; + _imgUrl3 + .gif;
}
public String getProductImageURL4() {
return http://static.myco.com/product-images/; + _imgUrl4 + .gif;
}
public String getProductImageURL5() {
return http://static.myco.com/product-images/; + _imgUrl5 + .gif;
}
}
Imagine another simple page like ProductList,
I have to define another list to show the image even there is only a
dynamic image for every product
The ProductList may look like
// ProductList.java
class ProductList{
private List _productList;
private List _imgList;
..
}
Oh god , so terrible codes.
There are a lot of similar require my project.
Can you give me more suggestion?
Howard Lewis Ship 写道:
In order to answer this question, some background is needed.
If you know the product's id (whatever you use, where it's SKU
number
or a
surrogate key) ... what is the exact process from going from that
to a
URL
suitable for an img tag?
That is ... are the images stored in the database? Or are they on
the
file
system somewhere? If they are files on the file system, are those
files
mapped to a client-visible URL?
In the latter case, you can do something like:
img t:id=productImage src=prop:productImageURL/
public String getProductImageURL() {
return http://static.myco.com/product-images/; + _productId +
.gif;
}
Assigning a t:id to a tag without specifying a component type
creates
an Any
component, a component that just renders whatever tag and informal
parameters you provide it. Here wer'e linking that to some Java code
in the
corresponding page or component that computes the URL of the product
based
on an instance variable. Probably your example is more complicated,
but you
get the idea.
There's another approach used when the data is inside the database,
but we
can dive into that if the above solution is insufficient.
Assets are useful for accessing resources inside the web application
context, or on the classpath, and includes logic related to
localization ...
but it is not always appropriate when accessing resources that are
well
outside the web application itself.
On 5/19/07, Allen Guo [EMAIL PROTECTED] wrote:
Hi All,
I want to show the ProductDetail page with product image. It
Re: How to load a image dynamiclly in tapestry5.0.4
The book The Pragmatic Programmer is an excellent start on learning how to
organize your code and your mind and work effectively, professionally, and
pragmatically.
http://www.powells.com/biblio/65-9780201616224-0
On 5/21/07, Allen Guo [EMAIL PROTECTED] wrote:
Thanks , It's running now
But suppose there is five properties of Product is relative with image
Product class looks like
class Product{
private String _img1;
private String _img2;
private String _img3;
private String _img4;
private String _img5;
}
So for show the img, I have to define the corresponding Img url in
ProductDetai.java like
// ProductDetail.java
class ProductDetail{
private String _imgUrl1;
private String _imgUrl2;
private String _imgUrl3;
private String _imgUrl4;
private String _imgUrl5;
public String getProductImageURL1() {
return http://static.myco.com/product-images/; + _imgUrl1 + .gif;
}
public String getProductImageURL2() {
return http://static.myco.com/product-images/; + _imgUrl2 + .gif;
}
public String getProductImageURL3() {
return http://static.myco.com/product-images/; + _imgUrl3 + .gif;
}
public String getProductImageURL4() {
return http://static.myco.com/product-images/; + _imgUrl4 + .gif;
}
public String getProductImageURL5() {
return http://static.myco.com/product-images/; + _imgUrl5 + .gif;
}
}
Imagine another simple page like ProductList,
I have to define another list to show the image even there is only a
dynamic image for every product
The ProductList may look like
// ProductList.java
class ProductList{
private List _productList;
private List _imgList;
..
}
Oh god , so terrible codes.
There are a lot of similar require my project.
Can you give me more suggestion?
Howard Lewis Ship 写道:
In order to answer this question, some background is needed.
If you know the product's id (whatever you use, where it's SKU number
or a
surrogate key) ... what is the exact process from going from that to a
URL
suitable for an img tag?
That is ... are the images stored in the database? Or are they on the
file
system somewhere? If they are files on the file system, are those files
mapped to a client-visible URL?
In the latter case, you can do something like:
img t:id=productImage src=prop:productImageURL/
public String getProductImageURL() {
return http://static.myco.com/product-images/; + _productId + .gif;
}
Assigning a t:id to a tag without specifying a component type creates
an Any
component, a component that just renders whatever tag and informal
parameters you provide it. Here wer'e linking that to some Java code
in the
corresponding page or component that computes the URL of the product
based
on an instance variable. Probably your example is more complicated,
but you
get the idea.
There's another approach used when the data is inside the database,
but we
can dive into that if the above solution is insufficient.
Assets are useful for accessing resources inside the web application
context, or on the classpath, and includes logic related to
localization ...
but it is not always appropriate when accessing resources that are well
outside the web application itself.
On 5/19/07, Allen Guo [EMAIL PROTECTED] wrote:
Hi All,
I want to show the ProductDetail page with product image. It looks like
img src=p_001.jpg /.
You know, every product has different image name,so I need to pass the
string 'p_001.jpg' to the corresponding page.
As result the img tag should look like img src=${product.image}/ or
I can use Asset to do it.
But I tried to do it using the first approach, exception occured.
And I don't know how to the second approach.
Can anyone give me an idea?
Thank in advance
Allen Guo
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
--
Howard M. Lewis Ship
TWD Consulting, Inc.
Independent J2EE / Open-Source Java Consultant
Creator and PMC Chair, Apache Tapestry
Creator, Apache HiveMind
Professional Tapestry training, mentoring, support
and project work. http://howardlewisship.com
Re: How to load a image dynamiclly in tapestry5.0.4
+1 I picked it up after seeing Howard mentioned it and loved it. :)
On 5/22/07, Howard Lewis Ship [EMAIL PROTECTED] wrote:
The book The Pragmatic Programmer is an excellent start on learning how
to
organize your code and your mind and work effectively, professionally, and
pragmatically.
http://www.powells.com/biblio/65-9780201616224-0
On 5/21/07, Allen Guo [EMAIL PROTECTED] wrote:
Thanks , It's running now
But suppose there is five properties of Product is relative with image
Product class looks like
class Product{
private String _img1;
private String _img2;
private String _img3;
private String _img4;
private String _img5;
}
So for show the img, I have to define the corresponding Img url in
ProductDetai.java like
// ProductDetail.java
class ProductDetail{
private String _imgUrl1;
private String _imgUrl2;
private String _imgUrl3;
private String _imgUrl4;
private String _imgUrl5;
public String getProductImageURL1() {
return http://static.myco.com/product-images/; + _imgUrl1 + .gif;
}
public String getProductImageURL2() {
return http://static.myco.com/product-images/; + _imgUrl2 + .gif;
}
public String getProductImageURL3() {
return http://static.myco.com/product-images/; + _imgUrl3 + .gif;
}
public String getProductImageURL4() {
return http://static.myco.com/product-images/; + _imgUrl4 + .gif;
}
public String getProductImageURL5() {
return http://static.myco.com/product-images/; + _imgUrl5 + .gif;
}
}
Imagine another simple page like ProductList,
I have to define another list to show the image even there is only a
dynamic image for every product
The ProductList may look like
// ProductList.java
class ProductList{
private List _productList;
private List _imgList;
..
}
Oh god , so terrible codes.
There are a lot of similar require my project.
Can you give me more suggestion?
Howard Lewis Ship 写道:
In order to answer this question, some background is needed.
If you know the product's id (whatever you use, where it's SKU number
or a
surrogate key) ... what is the exact process from going from that to a
URL
suitable for an img tag?
That is ... are the images stored in the database? Or are they on the
file
system somewhere? If they are files on the file system, are those
files
mapped to a client-visible URL?
In the latter case, you can do something like:
img t:id=productImage src=prop:productImageURL/
public String getProductImageURL() {
return http://static.myco.com/product-images/; + _productId + .gif;
}
Assigning a t:id to a tag without specifying a component type creates
an Any
component, a component that just renders whatever tag and informal
parameters you provide it. Here wer'e linking that to some Java code
in the
corresponding page or component that computes the URL of the product
based
on an instance variable. Probably your example is more complicated,
but you
get the idea.
There's another approach used when the data is inside the database,
but we
can dive into that if the above solution is insufficient.
Assets are useful for accessing resources inside the web application
context, or on the classpath, and includes logic related to
localization ...
but it is not always appropriate when accessing resources that are
well
outside the web application itself.
On 5/19/07, Allen Guo [EMAIL PROTECTED] wrote:
Hi All,
I want to show the ProductDetail page with product image. It looks
like
img src=p_001.jpg /.
You know, every product has different image name,so I need to pass
the
string 'p_001.jpg' to the corresponding page.
As result the img tag should look like img src=${product.image}/
or
I can use Asset to do it.
But I tried to do it using the first approach, exception occured.
And I don't know how to the second approach.
Can anyone give me an idea?
Thank in advance
Allen Guo
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
--
Howard M. Lewis Ship
TWD Consulting, Inc.
Independent J2EE / Open-Source Java Consultant
Creator and PMC Chair, Apache Tapestry
Creator, Apache HiveMind
Professional Tapestry training, mentoring, support
and project work. http://howardlewisship.com
--
Jesse Kuhnert
Tapestry/Dojo team member/developer
Open source based consulting work centered around
dojo/tapestry/tacos/hivemind. http://blog.opencomponentry.com
Re: How to load a image dynamiclly in tapestry5.0.4
But I don't think it's useful for me to organize TAPESTRY application
effectlly.
That books just represent basic programming Philosophy .
Jesse Kuhnert 写道:
+1 I picked it up after seeing Howard mentioned it and loved it. :)
On 5/22/07, Howard Lewis Ship [EMAIL PROTECTED] wrote:
The book The Pragmatic Programmer is an excellent start on learning
how
to
organize your code and your mind and work effectively,
professionally, and
pragmatically.
http://www.powells.com/biblio/65-9780201616224-0
On 5/21/07, Allen Guo [EMAIL PROTECTED] wrote:
Thanks , It's running now
But suppose there is five properties of Product is relative with image
Product class looks like
class Product{
private String _img1;
private String _img2;
private String _img3;
private String _img4;
private String _img5;
}
So for show the img, I have to define the corresponding Img url in
ProductDetai.java like
// ProductDetail.java
class ProductDetail{
private String _imgUrl1;
private String _imgUrl2;
private String _imgUrl3;
private String _imgUrl4;
private String _imgUrl5;
public String getProductImageURL1() {
return http://static.myco.com/product-images/; + _imgUrl1 + .gif;
}
public String getProductImageURL2() {
return http://static.myco.com/product-images/; + _imgUrl2 + .gif;
}
public String getProductImageURL3() {
return http://static.myco.com/product-images/; + _imgUrl3 + .gif;
}
public String getProductImageURL4() {
return http://static.myco.com/product-images/; + _imgUrl4 + .gif;
}
public String getProductImageURL5() {
return http://static.myco.com/product-images/; + _imgUrl5 + .gif;
}
}
Imagine another simple page like ProductList,
I have to define another list to show the image even there is only a
dynamic image for every product
The ProductList may look like
// ProductList.java
class ProductList{
private List _productList;
private List _imgList;
..
}
Oh god , so terrible codes.
There are a lot of similar require my project.
Can you give me more suggestion?
Howard Lewis Ship 写道:
In order to answer this question, some background is needed.
If you know the product's id (whatever you use, where it's SKU
number
or a
surrogate key) ... what is the exact process from going from that
to a
URL
suitable for an img tag?
That is ... are the images stored in the database? Or are they on
the
file
system somewhere? If they are files on the file system, are those
files
mapped to a client-visible URL?
In the latter case, you can do something like:
img t:id=productImage src=prop:productImageURL/
public String getProductImageURL() {
return http://static.myco.com/product-images/; + _productId +
.gif;
}
Assigning a t:id to a tag without specifying a component type
creates
an Any
component, a component that just renders whatever tag and informal
parameters you provide it. Here wer'e linking that to some Java code
in the
corresponding page or component that computes the URL of the product
based
on an instance variable. Probably your example is more complicated,
but you
get the idea.
There's another approach used when the data is inside the database,
but we
can dive into that if the above solution is insufficient.
Assets are useful for accessing resources inside the web application
context, or on the classpath, and includes logic related to
localization ...
but it is not always appropriate when accessing resources that are
well
outside the web application itself.
On 5/19/07, Allen Guo [EMAIL PROTECTED] wrote:
Hi All,
I want to show the ProductDetail page with product image. It looks
like
img src=p_001.jpg /.
You know, every product has different image name,so I need to pass
the
string 'p_001.jpg' to the corresponding page.
As result the img tag should look like img
src=${product.image}/
or
I can use Asset to do it.
But I tried to do it using the first approach, exception occured.
And I don't know how to the second approach.
Can anyone give me an idea?
Thank in advance
Allen Guo
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
--
Howard M. Lewis Ship
TWD Consulting, Inc.
Independent J2EE / Open-Source Java Consultant
Creator and PMC Chair, Apache Tapestry
Creator, Apache HiveMind
Professional Tapestry training, mentoring, support
and project work. http://howardlewisship.com
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands,
Re: How to load a image dynamiclly in tapestry5.0.4
On 5/21/07, Howard Lewis Ship [EMAIL PROTECTED] wrote:
Wait for 5.0.5 ... I'm working on code for that right now, so you'll be able
to write:
img src=/products_images/${productImageURL}/
Still, from a maintainability situation, I would prefer that the complete
URL come from the Java code side; if /product_images ever becomes, say,
/images/catalog some day, you may be able to fix it across your entire
application in exactly one place. That's the Dont Repeat Yourself principle
and your example jumps out at me as a potential problem.
Right, and with that you can even handle dinamyc javascript, i mean
javascript partially/totally generated by server side. That is (more
or less) what i asked in my previous mail.
Thanks Howard, i think you're really doing an amazing job!
--
Massimo
http://meridio.blogspot.com
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Re: How to load a image dynamiclly in tapestry5.0.4
Thanks , It's running now
But suppose there is five properties of Product is relative with image
Product class looks like
class Product{
private String _img1;
private String _img2;
private String _img3;
private String _img4;
private String _img5;
}
So for show the img, I have to define the corresponding Img url in
ProductDetai.java like
// ProductDetail.java
class ProductDetail{
private String _imgUrl1;
private String _imgUrl2;
private String _imgUrl3;
private String _imgUrl4;
private String _imgUrl5;
public String getProductImageURL1() {
return http://static.myco.com/product-images/; + _imgUrl1 + .gif;
}
public String getProductImageURL2() {
return http://static.myco.com/product-images/; + _imgUrl2 + .gif;
}
public String getProductImageURL3() {
return http://static.myco.com/product-images/; + _imgUrl3 + .gif;
}
public String getProductImageURL4() {
return http://static.myco.com/product-images/; + _imgUrl4 + .gif;
}
public String getProductImageURL5() {
return http://static.myco.com/product-images/; + _imgUrl5 + .gif;
}
}
Imagine another simple page like ProductList,
I have to define another list to show the image even there is only a
dynamic image for every product
The ProductList may look like
// ProductList.java
class ProductList{
private List _productList;
private List _imgList;
..
}
Oh god , so terrible codes.
There are a lot of similar require my project.
Can you give me more suggestion?
Howard Lewis Ship 写道:
In order to answer this question, some background is needed.
If you know the product's id (whatever you use, where it's SKU number
or a
surrogate key) ... what is the exact process from going from that to a
URL
suitable for an img tag?
That is ... are the images stored in the database? Or are they on the
file
system somewhere? If they are files on the file system, are those files
mapped to a client-visible URL?
In the latter case, you can do something like:
img t:id=productImage src=prop:productImageURL/
public String getProductImageURL() {
return http://static.myco.com/product-images/; + _productId + .gif;
}
Assigning a t:id to a tag without specifying a component type creates
an Any
component, a component that just renders whatever tag and informal
parameters you provide it. Here wer'e linking that to some Java code
in the
corresponding page or component that computes the URL of the product
based
on an instance variable. Probably your example is more complicated,
but you
get the idea.
There's another approach used when the data is inside the database,
but we
can dive into that if the above solution is insufficient.
Assets are useful for accessing resources inside the web application
context, or on the classpath, and includes logic related to
localization ...
but it is not always appropriate when accessing resources that are well
outside the web application itself.
On 5/19/07, Allen Guo [EMAIL PROTECTED] wrote:
Hi All,
I want to show the ProductDetail page with product image. It looks like
img src=p_001.jpg /.
You know, every product has different image name,so I need to pass the
string 'p_001.jpg' to the corresponding page.
As result the img tag should look like img src=${product.image}/ or
I can use Asset to do it.
But I tried to do it using the first approach, exception occured.
And I don't know how to the second approach.
Can anyone give me an idea?
Thank in advance
Allen Guo
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to load a image dynamiclly in tapestry5.0.4
This is how I used Asset for an image in T5.0.4
Java class
@Inject
@Path(context:images/banners/new_logo.jpg)
private Asset logoImage;
HTML code
prop:logoImage
Petros
Allen Guo wrote:
Hi All,
I want to show the ProductDetail page with product image. It looks like
p_001.jpg .
You know, every product has different image name,so I need to pass the
string 'p_001.jpg' to the corresponding page.
As result the img tag should look like ${product.image} or
I can use Asset to do it.
But I tried to do it using the first approach, exception occured.
And I don't know how to the second approach.
Can anyone give me an idea?
Thank in advance
Allen Guo
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
--
View this message in context:
http://www.nabble.com/How-to-load-a-image-dynamiclly-in-tapestry5.0.4-tf3784430.html#a10705166
Sent from the Tapestry - User mailing list archive at Nabble.com.
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Re: How to load a image dynamiclly in tapestry5.0.4
This is how I used Asset for an image in T5.0.4
Java class
@Inject
@Path(context:images/banners/new_logo.jpg)
private Asset logoImage;
HTML code
imgimg t:type=Any src=prop:logoImage width=30% height=92
border=0 /
Petros
Allen Guo wrote:
Hi All,
I want to show the ProductDetail page with product image. It looks like
p_001.jpg .
You know, every product has different image name,so I need to pass the
string 'p_001.jpg' to the corresponding page.
As result the img tag should look like ${product.image} or
I can use Asset to do it.
But I tried to do it using the first approach, exception occured.
And I don't know how to the second approach.
Can anyone give me an idea?
Thank in advance
Allen Guo
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Re: How to load a image dynamiclly in tapestry5.0.4
In order to answer this question, some background is needed.
If you know the product's id (whatever you use, where it's SKU number or a
surrogate key) ... what is the exact process from going from that to a URL
suitable for an img tag?
That is ... are the images stored in the database? Or are they on the file
system somewhere? If they are files on the file system, are those files
mapped to a client-visible URL?
In the latter case, you can do something like:
img t:id=productImage src=prop:productImageURL/
public String getProductImageURL() {
return http://static.myco.com/product-images/; + _productId + .gif;
}
Assigning a t:id to a tag without specifying a component type creates an Any
component, a component that just renders whatever tag and informal
parameters you provide it. Here wer'e linking that to some Java code in the
corresponding page or component that computes the URL of the product based
on an instance variable. Probably your example is more complicated, but you
get the idea.
There's another approach used when the data is inside the database, but we
can dive into that if the above solution is insufficient.
Assets are useful for accessing resources inside the web application
context, or on the classpath, and includes logic related to localization ...
but it is not always appropriate when accessing resources that are well
outside the web application itself.
On 5/19/07, Allen Guo [EMAIL PROTECTED] wrote:
Hi All,
I want to show the ProductDetail page with product image. It looks like
img src=p_001.jpg /.
You know, every product has different image name,so I need to pass the
string 'p_001.jpg' to the corresponding page.
As result the img tag should look like img src=${product.image}/ or
I can use Asset to do it.
But I tried to do it using the first approach, exception occured.
And I don't know how to the second approach.
Can anyone give me an idea?
Thank in advance
Allen Guo
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
--
Howard M. Lewis Ship
TWD Consulting, Inc.
Independent J2EE / Open-Source Java Consultant
Creator and PMC Chair, Apache Tapestry
Creator, Apache HiveMind
Professional Tapestry training, mentoring, support
and project work. http://howardlewisship.com
Re: How to load a image dynamiclly in tapestry5.0.4
Thank you very much. My image file is put on file system. It works now.
But I feel that it's not flexible.
I wrote the img tag like
img t:id=productImage src=prop:productImageURL/
But I want write it like
img t:id=productImage src=/products_images/prop:productImageURL/
You see, there is a folder prefix for the src property of img tag above
For this efffect, what should I do?
2007/5/21, Howard Lewis Ship [EMAIL PROTECTED]:
In order to answer this question, some background is needed.
If you know the product's id (whatever you use, where it's SKU number or
a
surrogate key) ... what is the exact process from going from that to a URL
suitable for an img tag?
That is ... are the images stored in the database? Or are they on the
file
system somewhere? If they are files on the file system, are those files
mapped to a client-visible URL?
In the latter case, you can do something like:
img t:id=productImage src=prop:productImageURL/
public String getProductImageURL() {
return http://static.myco.com/product-images/; + _productId + .gif;
}
Assigning a t:id to a tag without specifying a component type creates an
Any
component, a component that just renders whatever tag and informal
parameters you provide it. Here wer'e linking that to some Java code in
the
corresponding page or component that computes the URL of the product based
on an instance variable. Probably your example is more complicated, but
you
get the idea.
There's another approach used when the data is inside the database, but we
can dive into that if the above solution is insufficient.
Assets are useful for accessing resources inside the web application
context, or on the classpath, and includes logic related to localization
...
but it is not always appropriate when accessing resources that are well
outside the web application itself.
On 5/19/07, Allen Guo [EMAIL PROTECTED] wrote:
Hi All,
I want to show the ProductDetail page with product image. It looks like
img src=p_001.jpg /.
You know, every product has different image name,so I need to pass the
string 'p_001.jpg' to the corresponding page.
As result the img tag should look like img src=${product.image}/ or
I can use Asset to do it.
But I tried to do it using the first approach, exception occured.
And I don't know how to the second approach.
Can anyone give me an idea?
Thank in advance
Allen Guo
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
--
Howard M. Lewis Ship
TWD Consulting, Inc.
Independent J2EE / Open-Source Java Consultant
Creator and PMC Chair, Apache Tapestry
Creator, Apache HiveMind
Professional Tapestry training, mentoring, support
and project work. http://howardlewisship.com
Re: How to load a image dynamiclly in tapestry5.0.4
Wait for 5.0.5 ... I'm working on code for that right now, so you'll be able
to write:
img src=/products_images/${productImageURL}/
Still, from a maintainability situation, I would prefer that the complete
URL come from the Java code side; if /product_images ever becomes, say,
/images/catalog some day, you may be able to fix it across your entire
application in exactly one place. That's the Dont Repeat Yourself principle
and your example jumps out at me as a potential problem.
On 5/20/07, 蝈蝈龙 [EMAIL PROTECTED] wrote:
Thank you very much. My image file is put on file system. It works now.
But I feel that it's not flexible.
I wrote the img tag like
img t:id=productImage src=prop:productImageURL/
But I want write it like
img t:id=productImage src=/products_images/prop:productImageURL/
You see, there is a folder prefix for the src property of img tag above
For this efffect, what should I do?
2007/5/21, Howard Lewis Ship [EMAIL PROTECTED]:
In order to answer this question, some background is needed.
If you know the product's id (whatever you use, where it's SKU number
or
a
surrogate key) ... what is the exact process from going from that to a
URL
suitable for an img tag?
That is ... are the images stored in the database? Or are they on the
file
system somewhere? If they are files on the file system, are those files
mapped to a client-visible URL?
In the latter case, you can do something like:
img t:id=productImage src=prop:productImageURL/
public String getProductImageURL() {
return http://static.myco.com/product-images/; + _productId + .gif;
}
Assigning a t:id to a tag without specifying a component type creates an
Any
component, a component that just renders whatever tag and informal
parameters you provide it. Here wer'e linking that to some Java code in
the
corresponding page or component that computes the URL of the product
based
on an instance variable. Probably your example is more complicated, but
you
get the idea.
There's another approach used when the data is inside the database, but
we
can dive into that if the above solution is insufficient.
Assets are useful for accessing resources inside the web application
context, or on the classpath, and includes logic related to localization
...
but it is not always appropriate when accessing resources that are well
outside the web application itself.
On 5/19/07, Allen Guo [EMAIL PROTECTED] wrote:
Hi All,
I want to show the ProductDetail page with product image. It looks
like
img src=p_001.jpg /.
You know, every product has different image name,so I need to pass the
string 'p_001.jpg' to the corresponding page.
As result the img tag should look like img src=${product.image}/
or
I can use Asset to do it.
But I tried to do it using the first approach, exception occured.
And I don't know how to the second approach.
Can anyone give me an idea?
Thank in advance
Allen Guo
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
--
Howard M. Lewis Ship
TWD Consulting, Inc.
Independent J2EE / Open-Source Java Consultant
Creator and PMC Chair, Apache Tapestry
Creator, Apache HiveMind
Professional Tapestry training, mentoring, support
and project work. http://howardlewisship.com
--
Howard M. Lewis Ship
TWD Consulting, Inc.
Independent J2EE / Open-Source Java Consultant
Creator and PMC Chair, Apache Tapestry
Creator, Apache HiveMind
Professional Tapestry training, mentoring, support
and project work. http://howardlewisship.com
