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package com.sun.enterprise.deployment.annotation.impl;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileFilter;
import java.io.IOException;
import java.net.URL;
import java.util.Set;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.logging.Level;
import java.util.jar.JarFile;
import java.util.jar.JarEntry;
import java.nio.channels.Channels;
import java.nio.channels.ReadableByteChannel;
import com.sun.enterprise.deployment.annotation.Scanner;
import com.sun.enterprise.deployment.annotation.impl.JavaEEScanner;
import com.sun.enterprise.deployment.annotation.introspection.ClassFile;
/**
* This is an abstract class of the Scanner interface for J2EE module.
*
* @author Shing Wai Chan
*/
abstract class ModuleScanner extends JavaEEScanner implements Scanner {
protected File archiveFile = null;
protected ClassLoader classLoader = null;
protected ClassFile classFile = new ClassFile();
private boolean processAllClasses = Boolean.getBoolean("com.sun.enterprise.deployment.annotation.processAllClasses");
private Set<String> entries = new HashSet<String>();
/**
* This add extra className to be scanned.
* @param className
*/
protected void addScanClassName(String className) {
if (className!=null && className.length()!=0)
entries.add(className);
}
/**
* This add all classes in given jarFile to be scanned.
* @param jarFile
*/
protected void addScanJar(File jarFile) throws IOException {
JarFile jf = new JarFile(jarFile);
Enumeration<JarEntry> entriesEnum = jf.entries();
while(entriesEnum.hasMoreElements()) {
JarEntry je = entriesEnum.nextElement();
if (je.getName().endsWith(".class")) {
if (processAllClasses) {
addEntry(je);
} else {
// check if it contains top level annotations...
ReadableByteChannel channel = Channels.newChannel(jf.getInputStream(je));
if (channel!=null) {
if (classFile.containsAnnotation(channel, je.getSize())) {
addEntry(je);
}
}
}
}
}
}
private void addEntry(JarEntry je) {
String className = je.getName().replace('/', '.');
className = className.substring(0, className.length()-6);
entries.add(className);
}
private void addEntry(File top, File f) {
String fileName = f.getPath();
fileName = fileName.substring(top.getPath().length()+1);
String className = fileName.replace(File.separatorChar, '.');
className = className.substring(0, className.length()-6);
entries.add(className);
}
/**
* This will include all class in directory to be scanned.
* param directory
*/
protected void addScanDirectory(File directory) throws IOException {
initScanDirectory(directory, directory);
}
private void initScanDirectory(File top, File directory) throws IOException {
File[] files = directory.listFiles();
for (File file : files) {
if (file.isFile()) {
String fileName = file.getPath();
if (fileName.endsWith(".class")) {
if (processAllClasses) {
addEntry(top, file);
} else {
FileInputStream fis = null;
try {
fis = new FileInputStream(file);
if (classFile.containsAnnotation(fis.getChannel(), file.length())) {
addEntry(top, file);
}
} finally {
if (fis != null) {
fis.close();
}
}
}
}
} else {
initScanDirectory(top, file);
}
}
}
public ClassLoader getClassLoader() {
return classLoader;
}
public Set<Class> getElements() {
Set<Class> elements = new HashSet<Class>();
if (getClassLoader() == null) {
AnnotationUtils.getLogger().severe("Class loader null");
return elements;
}
for (String className : entries) {
if (AnnotationUtils.getLogger().isLoggable(Level.FINE)) {
AnnotationUtils.getLogger().fine("Getting " + className);
}
try {
elements.add(classLoader.loadClass(className));
} catch(ClassNotFoundException cnfe) {
AnnotationUtils.getLogger().log(Level.WARNING, "Cannot load " + className + " reason : " + cnfe.getMessage(), cnfe);
}
}
return elements;
}
}
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