org.glassfish.jersey.server.internal.scanning.FilesScanner Maven / Gradle / Ivy
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package org.glassfish.jersey.server.internal.scanning;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.NoSuchElementException;
import java.util.Stack;
import org.glassfish.jersey.internal.util.Tokenizer;
import org.glassfish.jersey.server.ResourceFinder;
/**
* A scanner that recursively scans directories and jar files.
* Files or jar entries are reported to a {@link ResourceProcessor}.
*
* @author Paul Sandoz
*/
public class FilesScanner implements ResourceFinder {
private ResourceFinderStack resourceFinderStack = new ResourceFinderStack();
private final File[] files;
private final boolean recursive;
/**
* Scan from a set of packages.
*
* @param fileNames an array of package names.
* @param recursive flag indicating whether sub-directories of any directories in the list of
* files should be included in the scanning ({@code true}) or not ({@code false}).
*/
public FilesScanner(final String[] fileNames, boolean recursive) {
this.recursive = recursive;
this.files = new File[Tokenizer.tokenize(fileNames, Tokenizer.COMMON_DELIMITERS).length];
for (int i = 0; i < files.length; i++) {
files[i] = new File(fileNames[i]);
}
for (final File f : files) {
processFile(f);
}
}
private void processFile(final File f) {
if (f.getName().endsWith(".jar") || f.getName().endsWith(".zip")) {
try {
resourceFinderStack.push(new JarFileScanner(new FileInputStream(f), "", true));
} catch (IOException e) {
// logging might be sufficient in this case
throw new ResourceFinderException(e);
}
} else {
resourceFinderStack.push(new ResourceFinder() {
Stack files = new Stack() {{
if (f.isDirectory()) {
final File[] subDirFiles = f.listFiles();
if (subDirFiles != null) {
for (File file : subDirFiles) {
push(file);
}
}
} else {
push(f);
}
}};
private File current;
private File next;
@Override
public boolean hasNext() {
while (next == null && !files.empty()) {
next = files.pop();
if (next.isDirectory()) {
if (recursive) {
processFile(next);
}
next = null;
} else if(next.getName().endsWith(".jar") || next.getName().endsWith(".zip")) {
processFile(next);
next = null;
}
}
return next != null;
}
@Override
public String next() {
if (next != null || hasNext()) {
current = next;
next = null;
return current.getName();
}
throw new NoSuchElementException();
}
@Override
public void remove() {
throw new UnsupportedOperationException();
}
@Override
public InputStream open() {
try {
return new FileInputStream(current);
} catch (FileNotFoundException e) {
throw new ResourceFinderException(e);
}
}
@Override
public void reset() {
}
});
}
}
@Override
public boolean hasNext() {
return resourceFinderStack.hasNext();
}
@Override
public String next() {
return resourceFinderStack.next();
}
@Override
public void remove() {
resourceFinderStack.remove();
}
@Override
public InputStream open() {
return resourceFinderStack.open();
}
@Override
public void reset() {
this.resourceFinderStack = new ResourceFinderStack();
for (File f : files) {
processFile(f);
}
}
}