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package com.sun.jersey.spi.scanning.servlet;
import com.sun.jersey.core.spi.scanning.JarFileScanner;
import com.sun.jersey.core.spi.scanning.Scanner;
import com.sun.jersey.core.spi.scanning.ScannerException;
import com.sun.jersey.core.spi.scanning.ScannerListener;
import com.sun.jersey.core.util.Closing;
import javax.servlet.ServletContext;
import java.io.IOException;
import java.io.InputStream;
import java.util.Set;
/**
* A scanner that recursively scans resources within a Web application.
*
* @author Paul.Sandoz@Sun.Com
*/
public class WebAppResourcesScanner implements Scanner {
private final String[] paths;
private final ServletContext sc;
/**
* Scan from a set of web resource paths.
* <p>
*
* @param paths an array of web resource paths.
* @param sc
*/
public WebAppResourcesScanner(final String[] paths, final ServletContext sc) {
this.paths = paths;
this.sc = sc;
}
// Scanner
public void scan(final ScannerListener cfl) {
for (final String path : paths) {
scan(path, cfl);
}
}
private void scan(final String root, final ScannerListener cfl) {
final Set<String> resourcePaths = sc.getResourcePaths(root);
if(resourcePaths == null)
return;
for (final String resourcePath : resourcePaths) {
if (resourcePath.endsWith("/")) {
scan(resourcePath, cfl);
} else if (resourcePath.endsWith(".jar")) {
try {
new Closing(sc.getResourceAsStream(resourcePath)).f(new Closing.Closure() {
public void f(final InputStream in) throws IOException {
JarFileScanner.scan(in, "", cfl);
}
});
} catch (IOException ex) {
throw new ScannerException("IO error scanning jar " + resourcePath, ex);
}
} else if (cfl.onAccept(resourcePath)) {
try {
new Closing(sc.getResourceAsStream(resourcePath)).f(new Closing.Closure() {
public void f(final InputStream in) throws IOException {
cfl.onProcess(resourcePath, in);
}
});
} catch (IOException ex) {
throw new ScannerException("IO error scanning resource " + resourcePath, ex);
}
}
}
}
}