com.sun.faces.application.resource.WebappResourceHelper Maven / Gradle / Ivy
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package com.sun.faces.application.resource;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.faces.FacesException;
import javax.faces.application.ProjectStage;
import javax.faces.context.FacesContext;
import com.sun.faces.config.WebConfiguration;
import com.sun.faces.util.FacesLogger;
import static com.sun.faces.config.WebConfiguration.BooleanWebContextInitParameter.CacheResourceModificationTimestamp;
/**
*
* A {@link ResourceHelper} implementation for finding/serving resources
* found within <contextroot>/resources directory of a
* web application.
*
*
* @since 2.0
*/
public class WebappResourceHelper extends ResourceHelper {
private static final Logger LOGGER = FacesLogger.RESOURCE.getLogger();
private static final String BASE_RESOURCE_PATH = "/resources";
private boolean cacheTimestamp;
// ------------------------------------------------------------ Constructors
public WebappResourceHelper() {
WebConfiguration webconfig = WebConfiguration.getInstance();
cacheTimestamp = webconfig.isOptionEnabled(CacheResourceModificationTimestamp);
}
// --------------------------------------------- Methods from ResourceHelper
/**
* @see com.sun.faces.application.resource.ResourceHelper#getBaseResourcePath()
*/
public String getBaseResourcePath() {
return BASE_RESOURCE_PATH;
}
/**
* @see ResourceHelper#getInputStream(ResourceInfo,javax.faces.context.FacesContext)
*/
protected InputStream getNonCompressedInputStream(ResourceInfo resource, FacesContext ctx)
throws IOException {
return ctx.getExternalContext().getResourceAsStream(resource.getPath());
}
/**
* @see ResourceHelper#getURL(ResourceInfo, javax.faces.context.FacesContext)
*/
public URL getURL(ResourceInfo resource, FacesContext ctx) {
try {
return ctx.getExternalContext().getResource(resource.getPath());
} catch (MalformedURLException e) {
return null;
}
}
/**
* @see ResourceHelper#findLibrary(String, String, javax.faces.context.FacesContext)
*/
public LibraryInfo findLibrary(String libraryName,
String localePrefix,
FacesContext ctx) {
String path;
if (localePrefix == null) {
path = getBaseResourcePath() + '/' + libraryName;
} else {
path = getBaseResourcePath()
+ '/'
+ localePrefix
+ '/'
+ libraryName;
}
Set resourcePaths =
ctx.getExternalContext().getResourcePaths(path);
// it could be possible that there exists an empty directory
// that is representing the library, but if it's empty, treat it
// as non-existant and return null.
if (resourcePaths != null && !resourcePaths.isEmpty()) {
VersionInfo version = getVersion(resourcePaths, false);
return new LibraryInfo(libraryName, version, localePrefix, this);
}
return null;
}
/**
* @see ResourceHelper#findResource(LibraryInfo, String, String, boolean, javax.faces.context.FacesContext)
*/
public ResourceInfo findResource(LibraryInfo library,
String resourceName,
String localePrefix,
boolean compressable,
FacesContext ctx) {
String basePath;
if (library != null) {
basePath = library.getPath() + '/' + resourceName;
} else {
if (localePrefix == null) {
basePath = getBaseResourcePath() + '/' + resourceName;
} else {
basePath = getBaseResourcePath()
+ '/'
+ localePrefix
+ '/'
+ resourceName;
}
}
// first check to see if the resource exists, if not, return null. Let
// the caller decide what to do.
try {
if (ctx.getExternalContext().getResource(basePath) == null) {
return null;
}
} catch (MalformedURLException e) {
throw new FacesException(e);
}
// we got to hear, so we know the resource exists (either as a directory
// or file)
Set resourcePaths =
ctx.getExternalContext().getResourcePaths(basePath);
// if getResourcePaths returns null or an empty set, this means that we have
// a non-directory resource, therefor, this resource isn't versioned.
ResourceInfo value;
if (resourcePaths == null || resourcePaths.size() == 0) {
if (library != null) {
value = new ResourceInfo(library,
resourceName,
null,
compressable,
resourceSupportsEL(resourceName, ctx),
ctx.isProjectStage(ProjectStage.Development),
cacheTimestamp);
} else {
value = new ResourceInfo(resourceName,
null,
localePrefix,
this,
compressable,
resourceSupportsEL(resourceName, ctx),
ctx.isProjectStage(ProjectStage.Development),
cacheTimestamp);
}
} else {
// ok, subdirectories exist, so find the latest 'version' directory
VersionInfo version = getVersion(resourcePaths, true);
if (version == null) {
if (LOGGER.isLoggable(Level.WARNING)) {
LOGGER.log(Level.WARNING,
"jsf.application.resource.unable_to_determine_resource_version.",
resourceName);
return null;
}
}
if (library != null) {
value = new ResourceInfo(library,
resourceName,
version,
compressable,
resourceSupportsEL(resourceName, ctx),
ctx.isProjectStage(ProjectStage.Development),
cacheTimestamp);
} else {
value = new ResourceInfo(resourceName,
version,
localePrefix,
this,
compressable,
resourceSupportsEL(resourceName, ctx),
ctx.isProjectStage(ProjectStage.Development),
cacheTimestamp);
}
}
if (value.isCompressable()) {
value = handleCompression(value);
}
return value;
}
}