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* and Distribution License("CDDL") (collectively, the "License"). You
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* obtain a copy of the License at
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package com.sun.faces.application.resource;
import java.io.File;
import java.util.logging.Logger;
import java.util.logging.Level;
import javax.faces.context.FacesContext;
import com.sun.faces.util.FacesLogger;
/**
*
* ResourceInfo is a simple wrapper class for information
* pertainant to building a complete resource path using a Library.
*
*/
public class ResourceInfo {
private static final Logger LOGGER = FacesLogger.RESOURCE.getLogger();
private static final String COMPRESSED_CONTENT_DIRECTORY =
"jsf-compressed";
String name;
String libraryName;
String localePrefix;
boolean cacheTimestamp;
boolean isDevStage;
VersionInfo version;
ResourceHelper helper;
LibraryInfo library;
String path;
String compressedPath;
boolean compressible;
boolean supportsEL;
private volatile long lastModified = Long.MIN_VALUE;
/**
* Constructs a new ResourceInfo using the specified details.
* The {@link ResourceHelper} of the resource will be the same as the
* {@link ResourceHelper} of the {@link LibraryInfo}.
* @param library the library containing this resource
* @param name the resource name
* @param version the version of this resource (if any)
* @param compressible if this resource should be compressed
* @param supportsEL true if this resource may contain
* EL expressions
* @param isDevStage true if this context is development stage
* @param cacheTimestamp true if the modification time of the
* resource should be cached. The value of this parameter will be ignored
* when {@link #isDevStage} is true
*/
public ResourceInfo(LibraryInfo library,
String name,
VersionInfo version,
boolean compressible,
boolean supportsEL,
boolean isDevStage,
boolean cacheTimestamp) {
this.name = name;
this.version = version;
this.helper = library.getHelper();
this.library = library;
this.libraryName = library.getName();
this.localePrefix = library.getLocalePrefix();
this.compressible = compressible;
this.supportsEL = supportsEL;
this.isDevStage = isDevStage;
this.cacheTimestamp = (!isDevStage && cacheTimestamp);
initPath(isDevStage);
}
/**
* Constructs a new ResourceInfo using the specified details.
* @param name the resource name
* @param version the version of the resource
* @param localePrefix the locale prefix for this resource (if any)
* @param helper helper the helper class for this resource
* @param compressible if this resource should be compressed
* @param supportsEL true if this resource may contain
* EL expressions
* @param isDevStage true if this context is development stage
* @param cacheTimestamp true if the modification time of the
* resource should be cached. The value of this parameter will be ignored
* when {@link #isDevStage} is true
*/
ResourceInfo(String name,
VersionInfo version,
String localePrefix,
ResourceHelper helper,
boolean compressible,
boolean supportsEL,
boolean isDevStage,
boolean cacheTimestamp) {
this.name = name;
this.version = version;
this.localePrefix = localePrefix;
this.helper = helper;
this.compressible = compressible;
this.supportsEL = supportsEL;
this.isDevStage = isDevStage;
this.cacheTimestamp = (!isDevStage && cacheTimestamp);
initPath(isDevStage);
}
// ---------------------------------------------------------- Public Methods
@Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
if (this == obj) {
return true;
}
final ResourceInfo other = (ResourceInfo) obj;
if ((this.name == null) ? (other.name != null) : !this.name.equals(other.name)) {
return false;
}
if ((this.libraryName == null) ? (other.libraryName != null) : !this.libraryName.equals(other.libraryName)) {
return false;
}
if ((this.localePrefix == null) ? (other.localePrefix != null) : !this.localePrefix.equals(other.localePrefix)) {
return false;
}
if (this.version != other.version && (this.version == null || !this.version.equals(other.version))) {
return false;
}
if (this.library != other.library && (this.library == null || !this.library.equals(other.library))) {
return false;
}
if ((this.path == null) ? (other.path != null) : !this.path.equals(other.path)) {
return false;
}
return true;
}
@Override
public int hashCode() {
int hash = 7;
hash = 97 * hash + (this.name != null ? this.name.hashCode() : 0);
hash = 97 * hash + (this.libraryName != null ? this.libraryName.hashCode() : 0);
hash = 97 * hash + (this.localePrefix != null ? this.localePrefix.hashCode() : 0);
hash = 97 * hash + (this.version != null ? this.version.hashCode() : 0);
hash = 97 * hash + (this.library != null ? this.library.hashCode() : 0);
hash = 97 * hash + (this.path != null ? this.path.hashCode() : 0);
return hash;
}
/**
* @return return the library name.
*/
public String getName() {
return name;
}
/**
* @return return the version of the resource, or null if the
* resource isn't versioned.
*/
public VersionInfo getVersion() {
return version;
}
/**
* @return return the {@link ResourceHelper} for this resource
*/
public ResourceHelper getHelper() {
return helper;
}
/**
* @return the Library associated with this resource, if any.
*/
public LibraryInfo getLibraryInfo() {
return library;
}
/**
* @return the Locale prefix, if any.
*/
public String getLocalePrefix() {
return localePrefix;
}
/**
* @return the full path (including the library, if any) of the
* resource.
*/
public String getPath() {
return path;
}
/**
* @return the path to which the compressed bits for this resource
* reside. If this resource isn't compressible and this method is called,
* it will return null
*/
public String getCompressedPath() {
return compressedPath;
}
/**
* @return true if this resource should be compressed,
* otherwise false
*/
public boolean isCompressable() {
return compressible;
}
/**
* @return true if the this resource may contain EL expressions
* that should be evaluated, otherwise, return false
*/
public boolean supportsEL() {
return supportsEL;
}
/**
* Disables EL evaluation for this resource.
*/
public void disableEL() {
this.supportsEL = false;
}
/**
* Returns the time this resource was last modified.
* If {@link com.sun.faces.config.WebConfiguration.BooleanWebContextInitParameter#CacheResourceModificationTimestamp}
* is true, the value will be cached for the lifetime if this ResourceInfo
* instance.
*
* @param ctx the {@link FacesContext} for the current request
*
* @return the time this resource was last modified (number of milliseconds
* since January 1, 1970 GMT).
*
*/
public long getLastModified(FacesContext ctx) {
if (cacheTimestamp) {
if (lastModified == Long.MIN_VALUE) {
synchronized (this) {
if (lastModified == Long.MIN_VALUE) {
lastModified = helper.getLastModified(this, ctx);
}
}
}
return lastModified;
} else {
return helper.getLastModified(this, ctx);
}
}
@Override
public String toString() {
return "ResourceInfo{" +
"name='" + name + '\'' +
", version=\'" + ((version != null) ? version : "NONE") + '\'' +
", libraryName='" + libraryName + '\'' +
", libraryVersion='" + ((library != null) ? library.getVersion() : "NONE") + '\'' +
", localePrefix='" + ((localePrefix != null) ? localePrefix : "NONE") + '\'' +
", path='" + path + '\'' +
", compressible='" + compressible + '\'' +
", compressedPath=" + compressedPath +
'}';
}
// --------------------------------------------------------- Private Methods
/**
* Create the full path to the resource. If the resource can be compressed,
* setup the compressedPath ivar so that the path refers to the
* directory refereneced by the context attribute javax.servlet.context.tempdir.
*/
private void initPath(boolean isDevStage) {
StringBuilder sb = new StringBuilder(32);
if (library != null) {
sb.append(library.getPath());
} else {
sb.append(helper.getBaseResourcePath());
}
if (library == null && localePrefix != null) {
sb.append('/').append(localePrefix);
}
// Specialcasing for handling jsf.js in uncompressed state
if (isDevStage && "javax.faces".equals(libraryName) && "jsf.js".equals(name)) {
sb.append('/').append("jsf-uncompressed.js");
} else {
sb.append('/').append(name);
}
if (version != null) {
sb.append('/').append(version.getVersion());
String extension = version.getExtension();
if (extension != null) {
sb.append('.').append(extension);
}
}
path = sb.toString();
if (compressible && !supportsEL) { // compression for static resources
FacesContext ctx = FacesContext.getCurrentInstance();
File servletTmpDir = (File) ctx.getExternalContext()
.getApplicationMap().get("javax.servlet.context.tempdir");
if (servletTmpDir == null || !servletTmpDir.isDirectory()) {
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE,
"File ({0}) referenced by javax.servlet.context.tempdir attribute is null, or was is not a directory. Compression for {1} will be unavailable.",
new Object[]{((servletTmpDir == null)
? "null"
: servletTmpDir.toString()),
path});
}
compressible = false;
} else {
String tPath = ((path.charAt(0) == '/') ? path : '/' + path);
File newDir = new File(servletTmpDir, COMPRESSED_CONTENT_DIRECTORY
+ tPath);
try {
if (!newDir.exists()) {
if (newDir.mkdirs()) {
compressedPath = newDir.getCanonicalPath();
} else {
compressible = false;
if (LOGGER.isLoggable(Level.WARNING)) {
LOGGER.log(Level.WARNING,
"jsf.application.resource.unable_to_create_compression_directory",
newDir.getCanonicalPath());
}
}
} else {
compressedPath = newDir.getCanonicalPath();
}
} catch (Exception e) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE,
e.toString(),
e);
}
compressible = false;
}
}
}
}
}
