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Jersey core server implementation
/*
* Copyright (c) 2012, 2019 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.IOException;
import java.io.InputStream;
import java.net.URI;
import java.util.Collections;
import java.util.NoSuchElementException;
import java.util.Set;
import org.glassfish.jersey.server.internal.AbstractResourceFinderAdapter;
/**
* Preparations for OSGi support.
*
* @author Jakub Podlesak
*/
final class BundleSchemeResourceFinderFactory implements UriSchemeResourceFinderFactory {
private static final Set SCHEMES = Collections.singleton("bundle");
@Override
public Set getSchemes() {
return SCHEMES;
}
/**
* Create new bundle scheme resource finder factory.
*/
BundleSchemeResourceFinderFactory() {
}
@Override
public BundleSchemeScanner create(final URI uri, final boolean recursive) {
return new BundleSchemeScanner(uri);
}
private class BundleSchemeScanner extends AbstractResourceFinderAdapter {
private BundleSchemeScanner(final URI uri) {
this.uri = uri;
}
private final URI uri;
/**
* Marks this iterator as iterated after execution of {@link #open()} method.
* Together with {@link #iterated}, this field determines a returned value of {@link #hasNext()}.
*/
private boolean accessed = false;
/**
* Marks this iterator as iterated after execution of {@link #next()} method.
* Together with {@link #accessed}, this field determines a returned value of {@link #hasNext()}.
*/
private boolean iterated = false;
@Override
public boolean hasNext() {
return !accessed && !iterated;
}
@Override
public String next() {
if (hasNext()) {
iterated = true;
return uri.getPath();
}
throw new NoSuchElementException();
}
@Override
public InputStream open() {
if (!accessed) {
try {
accessed = true;
return uri.toURL().openStream();
} catch (final IOException e) {
throw new ResourceFinderException(e);
}
}
return null;
}
@Override
public void reset() {
throw new UnsupportedOperationException();
}
}
}