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Jersey core server implementation
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2012-2015 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* http://glassfish.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
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* and therefore, elected the GPL Version 2 license, then the option applies
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*/
package org.glassfish.jersey.server.internal.scanning;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.NoSuchElementException;
import java.util.Stack;
import org.glassfish.jersey.internal.util.Tokenizer;
import org.glassfish.jersey.server.internal.AbstractResourceFinderAdapter;
/**
* A scanner that recursively scans directories and jar files.
* Files or jar entries are reported to a {@link ResourceProcessor}.
*
* @author Paul Sandoz
*/
public final class FilesScanner extends AbstractResourceFinderAdapter {
private final File[] files;
private final boolean recursive;
private CompositeResourceFinder compositeResourceFinder;
/**
* Scan from a set of packages.
*
* @param fileNames an array of package names.
* @param recursive flag indicating whether sub-directories of any directories in the list of
* files should be included in the scanning ({@code true}) or not ({@code false}).
*/
public FilesScanner(final String[] fileNames, final boolean recursive) {
this.recursive = recursive;
this.files = new File[Tokenizer.tokenize(fileNames, Tokenizer.COMMON_DELIMITERS).length];
for (int i = 0; i < files.length; i++) {
files[i] = new File(fileNames[i]);
}
init();
}
private void processFile(final File f) {
if (f.getName().endsWith(".jar") || f.getName().endsWith(".zip")) {
try {
compositeResourceFinder.push(new JarFileScanner(new FileInputStream(f), "", true));
} catch (final IOException e) {
// logging might be sufficient in this case
throw new ResourceFinderException(e);
}
} else {
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;
} else if (next.getName().endsWith(".jar") || next.getName().endsWith(".zip")) {
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();
}
});
}
}
@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() {
close();
init();
}
private void init() {
this.compositeResourceFinder = new CompositeResourceFinder();
for (final File file : files) {
processFile(file);
}
}
}