com.sun.faces.application.resource.ZipDirectoryEntryScanner Maven / Gradle / Ivy
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package com.sun.faces.application.resource;
import com.sun.faces.util.FacesLogger;
import java.io.IOException;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
class ZipDirectoryEntryScanner {
private static final Logger LOGGER = FacesLogger.RESOURCE.getLogger();
private static final String prefix = "META-INF/resources";
private static final int prefixLen = prefix.length();
Map resourceLibraries;
ZipDirectoryEntryScanner() {
ExternalContext extContext = FacesContext.getCurrentInstance().getExternalContext();
Set webInfLibJars = extContext.getResourcePaths("/WEB-INF/lib");
resourceLibraries = new ConcurrentHashMap();
ZipInputStream zis = null;
ZipEntry ze = null;
String entryName = null;
if (null != webInfLibJars) {
for (String cur : webInfLibJars) {
zis = new ZipInputStream(extContext.getResourceAsStream(cur));
try {
while (null != (ze = zis.getNextEntry())) {
entryName = ze.getName();
if (entryName.startsWith(prefix)) {
if (prefixLen < entryName.length()) {
entryName = entryName.substring(prefixLen + 1);
if (!entryName.endsWith("/")) {
// Assume this code is only reached if the zip entry
// is NOT a 'directory' entry.
int i = entryName.lastIndexOf("/");
if (-1 != i) {
entryName = entryName.substring(0, i);
if (!resourceLibraries.containsKey(entryName)) {
resourceLibraries.put(entryName, Boolean.TRUE);
}
}
}
}
}
}
} catch (IOException ioe) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE, "Unable to inspect resource library " + cur, ioe);
}
}
}
}
// remove the optional local prefix entries
Iterator iter = resourceLibraries.keySet().iterator();
String cur;
while (iter.hasNext()) {
cur = iter.next();
if (cur.contains("/")) {
iter.remove();
}
}
}
boolean libraryExists(String libraryName, String localePrefix) {
boolean result = false;
if (null != localePrefix) {
result = resourceLibraries.containsKey(localePrefix + "/" + libraryName);
} else {
result = resourceLibraries.containsKey(libraryName);
}
return result;
}
}