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package com.sun.faces.application.resource;
import java.util.ArrayList;
import java.util.List;
import javax.faces.component.UIViewRoot;
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 java.util.Collections;
import static com.sun.faces.config.WebConfiguration.BooleanWebContextInitParameter.CacheResourceModificationTimestamp;
/**
* <p>
* A {@link ResourceHelper} implementation for finding/serving resources
* found within <code><contextroot>/resources</code> directory of a
* web application.
* </p>
*
* @since 2.0
*/
public class WebappResourceHelper extends ResourceHelper {
private static final Logger LOGGER = FacesLogger.RESOURCE.getLogger();
private String BASE_RESOURCE_PATH;
private String BASE_CONTRACTS_PATH;
private boolean cacheTimestamp;
// ------------------------------------------------------------ Constructors
public WebappResourceHelper() {
WebConfiguration webconfig = WebConfiguration.getInstance();
cacheTimestamp = webconfig.isOptionEnabled(CacheResourceModificationTimestamp);
BASE_RESOURCE_PATH = webconfig.getOptionValue(WebConfiguration.WebContextInitParameter.WebAppResourcesDirectory);
BASE_CONTRACTS_PATH = webconfig.getOptionValue(WebConfiguration.WebContextInitParameter.WebAppContractsDirectory);
}
@Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final WebappResourceHelper other = (WebappResourceHelper) obj;
if ((this.BASE_RESOURCE_PATH == null) ? (other.BASE_RESOURCE_PATH != null) : !this.BASE_RESOURCE_PATH.equals(other.BASE_RESOURCE_PATH)) {
return false;
}
if ((this.BASE_CONTRACTS_PATH == null) ? (other.BASE_CONTRACTS_PATH != null) : !this.BASE_CONTRACTS_PATH.equals(other.BASE_CONTRACTS_PATH)) {
return false;
}
if (this.cacheTimestamp != other.cacheTimestamp) {
return false;
}
return true;
}
@Override
public int hashCode() {
int hash = 5;
hash = 37 * hash + (this.BASE_RESOURCE_PATH != null ? this.BASE_RESOURCE_PATH.hashCode() : 0);
hash = 37 * hash + (this.BASE_CONTRACTS_PATH != null ? this.BASE_CONTRACTS_PATH.hashCode() : 0);
hash = 37 * hash + (this.cacheTimestamp ? 1 : 0);
return hash;
}
// --------------------------------------------- Methods from ResourceHelper
/**
* @see com.sun.faces.application.resource.ResourceHelper#getBaseResourcePath()
*/
public String getBaseResourcePath() {
return BASE_RESOURCE_PATH;
}
@Override
public String getBaseContractsPath() {
return BASE_CONTRACTS_PATH;
}
/**
* @see ResourceHelper#getNonCompressedInputStream(com.sun.faces.application.resource.ResourceInfo, javax.faces.context.FacesContext)
*/
protected InputStream getNonCompressedInputStream(ResourceInfo resource, FacesContext ctx)
throws IOException {
return ctx.getExternalContext().getResourceAsStream(resource.getPath());
}
/**
* @see ResourceHelper#getURL(com.sun.faces.application.resource.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<String> 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) {
resourceName = trimLeadingSlash(resourceName);
ContractInfo [] outContract = new ContractInfo[1];
outContract[0] = null;
String basePath = findPathConsideringContracts(library, resourceName,
localePrefix, outContract, ctx);
if (null == basePath) {
if (library != null) {
basePath = library.getPath(localePrefix) + '/' + 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<String> 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.
ClientResourceInfo value;
if (resourcePaths == null || resourcePaths.size() == 0) {
if (library != null) {
value = new ClientResourceInfo(library,
outContract[0],
resourceName,
null,
compressable,
resourceSupportsEL(resourceName, library.getName(), ctx),
ctx.isProjectStage(ProjectStage.Development),
cacheTimestamp);
} else {
value = new ClientResourceInfo(outContract[0],
resourceName,
null,
localePrefix,
this,
compressable,
resourceSupportsEL(resourceName, null, ctx),
ctx.isProjectStage(ProjectStage.Development),
cacheTimestamp);
}
} else {
// ok, subdirectories exist, so find the latest 'version' directory
VersionInfo version = getVersion(resourcePaths, true);
if (version == null && LOGGER.isLoggable(Level.WARNING)) {
LOGGER.log(Level.WARNING,
"jsf.application.resource.unable_to_determine_resource_version.",
resourceName);
}
if (library != null) {
value = new ClientResourceInfo(library,
outContract[0],
resourceName,
version,
compressable,
resourceSupportsEL(resourceName, library.getName(), ctx),
ctx.isProjectStage(ProjectStage.Development),
cacheTimestamp);
} else {
value = new ClientResourceInfo(outContract[0],
resourceName,
version,
localePrefix,
this,
compressable,
resourceSupportsEL(resourceName, null, ctx),
ctx.isProjectStage(ProjectStage.Development),
cacheTimestamp);
}
}
if (value.isCompressable()) {
value = handleCompression(value);
}
return value;
}
private String findPathConsideringContracts(LibraryInfo library,
String resourceName,
String localePrefix,
ContractInfo [] outContract,
FacesContext ctx) {
UIViewRoot root = ctx.getViewRoot();
List<String> contracts = (null != root) ?
ctx.getResourceLibraryContracts() : Collections.EMPTY_LIST;
if (contracts.isEmpty()) {
String contractName = ctx.getExternalContext().getRequestParameterMap()
.get("con");
if (null != contractName && 0 < contractName.length()) {
contracts = new ArrayList<String>();
contracts.add(contractName);
} else {
return null;
}
}
String basePath = null;
for (String curContract : contracts) {
if (library != null) {
basePath = library.getPath(localePrefix) + '/' + curContract + '/' + resourceName;
} else {
if (localePrefix == null) {
basePath = getBaseContractsPath() + '/' + curContract + '/' + resourceName;
} else {
basePath = getBaseContractsPath()
+ '/' + curContract
+ '/'
+ localePrefix
+ '/'
+ resourceName;
}
}
try {
if (ctx.getExternalContext().getResource(basePath) != null) {
outContract[0] = new ContractInfo(curContract);
break;
} else {
basePath = null;
}
} catch (MalformedURLException e) {
throw new FacesException(e);
}
}
return basePath;
}
}