org.glassfish.jersey.server.internal.scanning.FileSchemeResourceFinderFactory Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jersey-server Show documentation
Show all versions of jersey-server Show documentation
Jersey core server implementation
/*
* Copyright (c) 2012, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package org.glassfish.jersey.server.internal.scanning;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.net.URI;
import java.util.Collections;
import java.util.NoSuchElementException;
import java.util.Set;
import java.util.Stack;
import org.glassfish.jersey.server.internal.AbstractResourceFinderAdapter;
/**
* A "file" scheme URI scanner that recursively scans directories.
* Files are reported to a {@link ResourceProcessor}.
*
* @author Paul Sandoz
*/
final class FileSchemeResourceFinderFactory implements UriSchemeResourceFinderFactory {
private static final Set SCHEMES = Collections.singleton("file");
@Override
public Set getSchemes() {
return SCHEMES;
}
/**
* Create new "file" scheme URI scanner factory.
*/
FileSchemeResourceFinderFactory() {
}
@Override
public FileSchemeScanner create(final URI uri, final boolean recursive) {
return new FileSchemeScanner(uri, recursive);
}
private class FileSchemeScanner extends AbstractResourceFinderAdapter {
private final CompositeResourceFinder compositeResourceFinder;
private final boolean recursive;
private FileSchemeScanner(final URI uri, final boolean recursive) {
this.compositeResourceFinder = new CompositeResourceFinder();
this.recursive = recursive;
processFile(new File(uri.getPath()));
}
@Override
public boolean hasNext() {
return compositeResourceFinder.hasNext();
}
@Override
public String next() {
return compositeResourceFinder.next();
}
@Override
public InputStream open() {
return compositeResourceFinder.open();
}
@Override
public void close() {
compositeResourceFinder.close();
}
@Override
public void reset() {
throw new UnsupportedOperationException();
}
private void processFile(final File f) {
compositeResourceFinder.push(new AbstractResourceFinderAdapter() {
Stack files = new Stack() {{
if (f.isDirectory()) {
final File[] subDirFiles = f.listFiles();
if (subDirFiles != null) {
for (final 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;
}
}
return next != null;
}
@Override
public String next() {
if (next != null || hasNext()) {
current = next;
next = null;
return current.getName();
}
throw new NoSuchElementException();
}
@Override
public InputStream open() {
try {
return new FileInputStream(current);
} catch (final FileNotFoundException e) {
throw new ResourceFinderException(e);
}
}
@Override
public void reset() {
throw new UnsupportedOperationException();
}
});
}
}
}