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EE4J Compatible Implementation for Jakarta Faces API
/*
* Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package com.sun.faces.application.resource;
import static javax.faces.application.ResourceHandler.JSF_SCRIPT_LIBRARY_NAME;
import static javax.faces.application.ResourceHandler.JSF_SCRIPT_RESOURCE_NAME;
import java.io.File;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.faces.context.FacesContext;
import com.sun.faces.util.FacesLogger;
/**
*
* ClientResourceInfo is a simple wrapper class for information
* pertinent to building a complete resource path using a Library.
*
*/
public class ClientResourceInfo extends ResourceInfo {
private static final Logger LOGGER = FacesLogger.RESOURCE.getLogger();
private static final String COMPRESSED_CONTENT_DIRECTORY =
"jsf-compressed";
boolean cacheTimestamp;
boolean isDevStage;
String compressedPath;
boolean compressible;
boolean supportsEL;
private volatile long lastModified = Long.MIN_VALUE;
/**
* Constructs a new ClientResourceInfo 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 ClientResourceInfo(LibraryInfo library,
ContractInfo contract,
String name,
VersionInfo version,
boolean compressible,
boolean supportsEL,
boolean isDevStage,
boolean cacheTimestamp) {
super(library, contract, name, version);
this.compressible = compressible;
this.supportsEL = supportsEL;
this.isDevStage = isDevStage;
this.cacheTimestamp = (!isDevStage && cacheTimestamp);
initPath(isDevStage);
}
/**
* Constructs a new ClientResourceInfo 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
*/
ClientResourceInfo(ContractInfo contract,
String name,
VersionInfo version,
String localePrefix,
ResourceHelper helper,
boolean compressible,
boolean supportsEL,
boolean isDevStage,
boolean cacheTimestamp) {
super(contract, name, version, helper);
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);
}
ClientResourceInfo(ClientResourceInfo other, boolean copyLocalePrefix) {
super(other, copyLocalePrefix);
this.cacheTimestamp = other.cacheTimestamp;
this.compressedPath = other.compressedPath;
this.compressible = other.compressible;
this.isDevStage = other.isDevStage;
this.lastModified = other.lastModified;
this.supportsEL = other.supportsEL;
initPath(isDevStage);
}
public void copy(ClientResourceInfo other) {
super.copy(other);
this.cacheTimestamp = other.cacheTimestamp;
this.compressedPath = other.compressedPath;
this.compressible = other.compressible;
this.isDevStage = other.isDevStage;
this.lastModified = other.lastModified;
this.supportsEL = other.supportsEL;
}
// ---------------------------------------------------------- Public Methods
/**
* @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 ClientResourceInfo
* 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 + '\'' +
", contractInfo='" + (contract != null ? contract.contract : "NONE") + '\'' +
", 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 {
if (null != contract) {
sb.append(helper.getBaseContractsPath());
sb.append("/").append(contract);
} else {
sb.append(helper.getBaseResourcePath());
}
}
if (library == null && localePrefix != null) {
sb.append('/').append(localePrefix);
}
// Specialcasing for handling JSF script in uncompressed state
if (isDevStage && JSF_SCRIPT_LIBRARY_NAME.equals(libraryName) && JSF_SCRIPT_RESOURCE_NAME.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;
}
}
}
}
}