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123 lines (115 loc) · 5.15 KB
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/*
* Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
*
* Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product
* that is described in this document. In particular, and without limitation, these intellectual property
* rights may include one or more of the U.S. patents listed at http://www.sun.com/patents and one or
* more additional patents or pending patent applications in the U.S. and in other countries.
*
* U.S. Government Rights - Commercial software. Government users are subject to the Sun
* Microsystems, Inc. standard license agreement and applicable provisions of the FAR and its
* supplements.
*
* Use is subject to license terms. Sun, Sun Microsystems, the Sun logo, Java and Solaris are trademarks or
* registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries. All SPARC trademarks
* are used under license and are trademarks or registered trademarks of SPARC International, Inc. in the
* U.S. and other countries.
*
* UNIX is a registered trademark in the U.S. and other countries, exclusively licensed through X/Open
* Company, Ltd.
*/
package com.sun.max.program;
import java.io.*;
import java.util.*;
import java.util.zip.*;
import com.sun.max.io.*;
import com.sun.max.program.Classpath.*;
/**
* Provides a facility for processing all the resources reachable on a given {@linkplain Classpath classpath}.
*
* @author Doug Simon
*/
public class ClasspathTraversal {
/**
* Handles a standard file resource encountered during the traversal.
*
* @param parent the classpath directory entry under which the resource is located
* @param resource the path of the resource relative to {@code parent}. The
* {@linkplain File#separatorChar platform specific} character is used as the path separator in this
* value.
* @return true if the traversal should continue, false if it should terminate
*/
protected boolean visitFile(File parent, String resource) {
return true;
}
/**
* Handles an archive entry resource encountered during the traversal.
*
* @param archive the classpath .zip or .jar entry in which the resource is located
* @param resource the archive entry holding the resource
* @return true if the traversal should continue, false if it should terminate
*/
protected boolean visitArchiveEntry(ZipFile archive, ZipEntry resource) {
return true;
}
/**
* Traverses all the resources reachable on a given classpath.
*
* @param classpath the classpath to search
*/
public void run(final Classpath classpath) {
run(classpath, null);
}
/**
* Traverses all the resources reachable on a given classpath.
*
* @param classpath the classpath to search
* @param resourcePrefixFilter if non-null, then only resources whose name begins with this value are traversed. The
* '/' character must be used in this value as the path separator regardless of the
* {@linkplain File#separatorChar default} for the underlying platform.
*/
public void run(final Classpath classpath, String resourcePrefixFilter) {
for (final Entry entry : classpath.entries()) {
if (entry.isDirectory()) {
final String prefix = entry.path() + File.separator;
final File startFile;
if (resourcePrefixFilter == null) {
startFile = entry.file();
} else {
if (File.separatorChar != '/') {
startFile = new File(entry.file(), resourcePrefixFilter.replace('/', File.separatorChar));
} else {
startFile = new File(entry.file(), resourcePrefixFilter);
}
}
final FileTraversal fileTraversal = new FileTraversal() {
@Override
protected void visitFile(File file) {
final String path = file.getPath();
assert path.startsWith(prefix);
final String resource = path.substring(prefix.length());
if (!ClasspathTraversal.this.visitFile(entry.file(), resource)) {
stop();
}
}
};
fileTraversal.run(startFile);
if (fileTraversal.wasStopped()) {
return;
}
} else if (entry.isArchive()) {
final ZipFile zipFile = entry.zipFile();
if (zipFile != null) {
for (final Enumeration<? extends ZipEntry> e = zipFile.entries(); e.hasMoreElements();) {
final ZipEntry zipEntry = e.nextElement();
if (resourcePrefixFilter == null || zipEntry.getName().startsWith(resourcePrefixFilter)) {
if (!visitArchiveEntry(zipFile, zipEntry)) {
return;
}
}
}
}
}
}
}
}