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package com.sun.jersey.core.spi.scanning;
import com.sun.jersey.core.util.Closing;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.jar.JarEntry;
import java.util.jar.JarInputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
/**
* A utility class that scans entries in jar files.
*
* @author Paul.Sandoz@Sun.Com
*/
public final class JarFileScanner {
/**
* Scan entries in a jar file.
* <p>
* An entry will be reported to the scanning listener if the entry is a
* child of the parent path.
*
* @param f the jar file.
* @param parent the parent path.
* @param sl the scanning lister to report jar entries.
* @throws IOException if an error occurred scanning the jar entries
*/
public static void scan(final File f, final String parent, final ScannerListener sl) throws IOException {
new Closing(new FileInputStream(f)).f(new Closing.Closure() {
public void f(final InputStream in) throws IOException {
scan(in, parent, sl);
}
});
}
/**
* Scan entries in a jar file.
* <p>
* An entry will be reported to the scanning listener if the entry is a
* child of the parent path.
*
* @param in the jar file as an input stream.
* @param parent the parent path.
* @param sl the scanning lister to report jar entries.
* @throws IOException if an error occurred scanning the jar entries
*/
public static void scan(final InputStream in, final String parent, final ScannerListener sl) throws IOException {
JarInputStream jarIn = null;
try {
jarIn = new JarInputStream(in);
JarEntry e = jarIn.getNextJarEntry();
while (e != null) {
if (!e.isDirectory() && e.getName().startsWith(parent) && sl.onAccept(e.getName())) {
sl.onProcess(e.getName(), jarIn);
}
jarIn.closeEntry();
e = jarIn.getNextJarEntry();
}
} finally {
if (jarIn != null) {
jarIn.close();
}
}
}
}