[jira] [Resolved] (MYFACES-3128) Problems with a custom Resource Resolver
[
https://issues.apache.org/jira/browse/MYFACES-3128?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Juan Fernandez Corugedo resolved MYFACES-3128.
--
Resolution: Duplicate
Fix Version/s: 2.1.0
2.1.0-SNAPSHOT
https://issues.apache.org/jira/browse/MYFACES-2628
Problems with a custom Resource Resolver
Key: MYFACES-3128
URL: https://issues.apache.org/jira/browse/MYFACES-3128
Project: MyFaces Core
Issue Type: Bug
Affects Versions: 2.0.5
Environment: GlassFish 3.0 with Oracle JVM 1.6 and Websphere
7.0.0.13 with IBM JVM 1.6
Reporter: Juan Fernandez Corugedo
Fix For: 2.1.0-SNAPSHOT, 2.1.0
Attachments: mojarra-test.war, myfaces-test.war
Hi.
I'm working in a project with Myfaces 2.0.5 (or 2.1.0) and I have had a
problem with a custom ResourceResolver.
I have coded a ResourceResolver that dynamically builds an XHTML file when
the engine asks him to resolve a certain URL.
To achieve this, I have update the web.xml as follows:
context-param
param-namejavax.faces.FACELETS_VIEW_MAPPINGS/param-name
param-value*.test;*.xhtml/param-value
/context-param
context-param
param-namejavax.faces.FACELETS_RESOURCE_RESOLVER/param-name
param-valuecom.test.view.facelets.CustomResourceResolver/param-value
/context-param
My CustomResourceResolver is very simple:
package com.test.view.facelets;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLStreamHandler;
import javax.faces.view.facelets.ResourceResolver;
public class CustomResourceResolver extends ResourceResolver {
private ResourceResolver innerResourceResolver;
private String viewSource = xhtml of the test page ;
public CustomResourceResolver(ResourceResolver resourceResolver){
this.innerResourceResolver = resourceResolver;
}
@Override
public URL resolveUrl(String path) {
System.out.println(Buscando la URL del recurso: + path);
URL result = null;
if(path.endsWith(.test)){
try{
result = getUrlForResourceAsStream(path);
}catch(Exception e){
System.out.println(Unexpected error while obtaining the URL
from resource + path);
e.printStackTrace(System.out);
}
}else{
result = this.innerResourceResolver.resolveUrl(path);
}
return result;
}
private URL getUrlForResourceAsStream(String path) throws
MalformedURLException {
URLStreamHandler handler = new URLStreamHandler() {
protected URLConnection openConnection(URL u) throws IOException {
final String file = u.getFile();
return new URLConnection(u) {
public void connect() throws IOException {
}
public InputStream getInputStream() throws IOException {
System.out.println(Opening internal url to + file);
try{
System.out.println(Generando el InputStream de
la pagina:\n + viewSource);
return new
ByteArrayInputStream(viewSource.getBytes(UTF-8));
}catch (Exception e) {
e.printStackTrace();
throw new RuntimeException(Unexpected error
while obtaining the view, e);
}
}
};
}
};
return new URL(internal, null, 0, path, handler);
}
}
As you can see, the code is very simple. When the suffix matches the pattern
.test, the Resolver creates a mock URL with a backing ByteArrayInputStream.
If the suffix does not matches the pattern, the normal ResourceResolver is
invoked.
With this configuration and code, when I request the URL:
http://xx:/z/anything.test the application fails with error:
The problem is this:
java.lang.NullPointerException
at java.lang.StringBuilder.init(StringBuilder.java:92)
at
org.apache.myfaces.view.facelets.FaceletViewDeclarationLanguage.getRenderedViewId(FaceletViewDeclarationLanguage.java:1630)
at
org.apache.myfaces.view.facelets.FaceletViewDeclarationLanguage.buildView(FaceletViewDeclarationLanguage.java:279)
The executes the viewHandler.createView(.test) method. It internally
calls the getViewHandlerSupport().calculateViewId(context, viewId); method to
obtain the viewId, and this method calls
[jira] [Created] (MYFACES-3128) Problems with a custom Resource Resolver
Problems with a custom Resource Resolver
Key: MYFACES-3128
URL: https://issues.apache.org/jira/browse/MYFACES-3128
Project: MyFaces Core
Issue Type: Bug
Affects Versions: 2.0.5
Environment: GlassFish 3.0 with Oracle JVM 1.6 and Websphere 7.0.0.13
with IBM JVM 1.6
Reporter: Juan Fernandez Corugedo
Hi.
I'm working in a project with Myfaces 2.0.5 and I have had a problem with a
custom ResourceResolver.
I have coded a ResourceResolver that dynamically builds an XHTML file when the
engine asks him to resolve a certain URL.
To achieve this, I have update the web.xml as follows:
context-param
param-namejavax.faces.FACELETS_VIEW_MAPPINGS/param-name
param-value*.test;*.xhtml/param-value
/context-param
context-param
param-namejavax.faces.FACELETS_RESOURCE_RESOLVER/param-name
param-valuecom.test.view.facelets.CustomResourceResolver/param-value
/context-param
My CustomResourceResolver is very simple:
package com.test.view.facelets;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLStreamHandler;
import javax.faces.view.facelets.ResourceResolver;
public class CustomResourceResolver extends ResourceResolver {
private ResourceResolver innerResourceResolver;
private String viewSource = xhtml of the test page ;
public CustomResourceResolver(ResourceResolver resourceResolver){
this.innerResourceResolver = resourceResolver;
}
@Override
public URL resolveUrl(String path) {
System.out.println(Buscando la URL del recurso: + path);
URL result = null;
if(path.endsWith(.test)){
try{
result = getUrlForResourceAsStream(path);
}catch(Exception e){
System.out.println(Unexpected error while obtaining the URL
from resource + path);
e.printStackTrace(System.out);
}
}else{
result = this.innerResourceResolver.resolveUrl(path);
}
return result;
}
private URL getUrlForResourceAsStream(String path) throws
MalformedURLException {
URLStreamHandler handler = new URLStreamHandler() {
protected URLConnection openConnection(URL u) throws IOException {
final String file = u.getFile();
return new URLConnection(u) {
public void connect() throws IOException {
}
public InputStream getInputStream() throws IOException {
System.out.println(Opening internal url to + file);
try{
System.out.println(Generando el InputStream de la
pagina:\n + viewSource);
return new
ByteArrayInputStream(viewSource.getBytes(UTF-8));
}catch (Exception e) {
e.printStackTrace();
throw new RuntimeException(Unexpected error while
obtaining the view, e);
}
}
};
}
};
return new URL(internal, null, 0, path, handler);
}
}
As you can see, the code is very simple. When the suffix matches the pattern
.test, the Resolver creates a mock URL with a backing ByteArrayInputStream.
If the suffix does not matches the pattern, the normal ResourceResolver is
invoked.
With this configuration and code, when I request the URL:
http://xx:/z/anything.test the application fails with error:
The problem is this:
java.lang.NullPointerException
at java.lang.StringBuilder.init(StringBuilder.java:92)
at
org.apache.myfaces.view.facelets.FaceletViewDeclarationLanguage.getRenderedViewId(FaceletViewDeclarationLanguage.java:1630)
at
org.apache.myfaces.view.facelets.FaceletViewDeclarationLanguage.buildView(FaceletViewDeclarationLanguage.java:279)
The executes the viewHandler.createView(.test) method. It internally
calls the getViewHandlerSupport().calculateViewId(context, viewId); method to
obtain the viewId, and this method calls
DefaultViewHandlerSupport.checkResourceExists(FacesContext context, String
viewId), that checks the physical file of this resource, but there are not any
file for this resource so it return false, and the viewId of the resulting
ViewRoot is assigned to null.
This causes a NullPointerException later, when the code executes the
ViewDeclarationLanguage.buildView(FacesContext context, ViewRoot viewRoot).
If I change the Myfaces implementation with Mojarra 2.0.4, it works perfectly,
so I think that the problem is in the implementation.
I can't extend any class of interface
