org.glassfish.jersey.servlet.WebAppResourcesScanner Maven / Gradle / Ivy
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package org.glassfish.jersey.servlet;
import java.io.IOException;
import java.io.InputStream;
import java.util.Deque;
import java.util.LinkedList;
import java.util.NoSuchElementException;
import java.util.Set;
import javax.servlet.ServletContext;
import org.glassfish.jersey.server.ResourceFinder;
import org.glassfish.jersey.server.internal.scanning.JarFileScanner;
import org.glassfish.jersey.server.internal.scanning.ResourceFinderException;
import org.glassfish.jersey.server.internal.scanning.ResourceFinderStack;
/**
* A scanner that recursively scans resources within a Web application.
*
* @author Paul Sandoz
*/
class WebAppResourcesScanner implements ResourceFinder {
// private final String[] paths;
private final ServletContext sc;
private ResourceFinderStack resourceFinderStack = new ResourceFinderStack();
private static String[] paths = new String[]{"/WEB-INF/lib/", "/WEB-INF/classes/"};
/**
* Scan from a set of web resource paths.
*
*
* @param sc {@link ServletContext}.
*/
WebAppResourcesScanner(final ServletContext sc) {
this.sc = sc;
processPaths(paths);
}
private void processPaths(String... paths) {
for (final String path : paths) {
final Set resourcePaths = sc.getResourcePaths(path);
if (resourcePaths == null) {
break;
}
resourceFinderStack.push(new ResourceFinder() {
private Deque resourcePathsStack = new LinkedList() {
private static final long serialVersionUID = 3109256773218160485L;
{
for (String resourcePath : resourcePaths) {
push(resourcePath);
}
}
};
private String current;
private String next;
@Override
public boolean hasNext() {
while (next == null && !resourcePathsStack.isEmpty()) {
next = resourcePathsStack.pop();
if (next.endsWith("/")) {
processPaths(next);
next = null;
} else if (next.endsWith(".jar")) {
try {
resourceFinderStack.push(new JarFileScanner(sc.getResourceAsStream(next), "", true));
} catch (IOException ioe) {
throw new ResourceFinderException(ioe);
}
next = null;
}
}
return next != null;
}
@Override
public String next() {
if (next != null || hasNext()) {
current = next;
next = null;
return current;
}
throw new NoSuchElementException();
}
@Override
public void remove() {
throw new UnsupportedOperationException();
}
@Override
public InputStream open() {
return sc.getResourceAsStream(current);
}
@Override
public void reset() {
throw new UnsupportedOperationException();
}
});
}
}
@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() {
resourceFinderStack = new ResourceFinderStack();
processPaths(paths);
}
}