| /* |
| * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package com.sun.tools.jdeps; |
| |
| import com.sun.tools.classfile.ClassFile; |
| import com.sun.tools.classfile.ConstantPoolException; |
| import com.sun.tools.classfile.Dependencies.ClassFileError; |
| import java.io.*; |
| import java.nio.file.FileVisitResult; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.nio.file.SimpleFileVisitor; |
| import java.nio.file.attribute.BasicFileAttributes; |
| import java.util.*; |
| import java.util.jar.JarEntry; |
| import java.util.jar.JarFile; |
| |
| /** |
| * ClassFileReader reads ClassFile(s) of a given path that can be |
| * a .class file, a directory, or a JAR file. |
| */ |
| public class ClassFileReader { |
| /** |
| * Returns a ClassFileReader instance of a given path. |
| */ |
| public static ClassFileReader newInstance(Path path) throws IOException { |
| if (!Files.exists(path)) { |
| throw new FileNotFoundException(path.toString()); |
| } |
| |
| if (Files.isDirectory(path)) { |
| return new DirectoryReader(path); |
| } else if (path.getFileName().toString().endsWith(".jar")) { |
| return new JarFileReader(path); |
| } else { |
| return new ClassFileReader(path); |
| } |
| } |
| |
| /** |
| * Returns a ClassFileReader instance of a given JarFile. |
| */ |
| public static ClassFileReader newInstance(Path path, JarFile jf) throws IOException { |
| return new JarFileReader(path, jf); |
| } |
| |
| protected final Path path; |
| protected final String baseFileName; |
| protected final List<String> skippedEntries = new ArrayList<>(); |
| protected ClassFileReader(Path path) { |
| this.path = path; |
| this.baseFileName = path.getFileName() != null |
| ? path.getFileName().toString() |
| : path.toString(); |
| } |
| |
| public String getFileName() { |
| return baseFileName; |
| } |
| |
| public List<String> skippedEntries() { |
| return skippedEntries; |
| } |
| |
| /** |
| * Returns the ClassFile matching the given binary name |
| * or a fully-qualified class name. |
| */ |
| public ClassFile getClassFile(String name) throws IOException { |
| if (name.indexOf('.') > 0) { |
| int i = name.lastIndexOf('.'); |
| String pathname = name.replace('.', File.separatorChar) + ".class"; |
| if (baseFileName.equals(pathname) || |
| baseFileName.equals(pathname.substring(0, i) + "$" + |
| pathname.substring(i+1, pathname.length()))) { |
| return readClassFile(path); |
| } |
| } else { |
| if (baseFileName.equals(name.replace('/', File.separatorChar) + ".class")) { |
| return readClassFile(path); |
| } |
| } |
| return null; |
| } |
| |
| public Iterable<ClassFile> getClassFiles() throws IOException { |
| return new Iterable<ClassFile>() { |
| public Iterator<ClassFile> iterator() { |
| return new FileIterator(); |
| } |
| }; |
| } |
| |
| protected ClassFile readClassFile(Path p) throws IOException { |
| InputStream is = null; |
| try { |
| is = Files.newInputStream(p); |
| return ClassFile.read(is); |
| } catch (ConstantPoolException e) { |
| throw new ClassFileError(e); |
| } finally { |
| if (is != null) { |
| is.close(); |
| } |
| } |
| } |
| |
| class FileIterator implements Iterator<ClassFile> { |
| int count; |
| FileIterator() { |
| this.count = 0; |
| } |
| public boolean hasNext() { |
| return count == 0 && baseFileName.endsWith(".class"); |
| } |
| |
| public ClassFile next() { |
| if (!hasNext()) { |
| throw new NoSuchElementException(); |
| } |
| try { |
| ClassFile cf = readClassFile(path); |
| count++; |
| return cf; |
| } catch (IOException e) { |
| throw new ClassFileError(e); |
| } |
| } |
| |
| public void remove() { |
| throw new UnsupportedOperationException("Not supported yet."); |
| } |
| } |
| |
| public String toString() { |
| return path.toString(); |
| } |
| |
| private static class DirectoryReader extends ClassFileReader { |
| DirectoryReader(Path path) throws IOException { |
| super(path); |
| } |
| |
| public ClassFile getClassFile(String name) throws IOException { |
| if (name.indexOf('.') > 0) { |
| int i = name.lastIndexOf('.'); |
| String pathname = name.replace('.', File.separatorChar) + ".class"; |
| Path p = path.resolve(pathname); |
| if (!Files.exists(p)) { |
| p = path.resolve(pathname.substring(0, i) + "$" + |
| pathname.substring(i+1, pathname.length())); |
| } |
| if (Files.exists(p)) { |
| return readClassFile(p); |
| } |
| } else { |
| Path p = path.resolve(name + ".class"); |
| if (Files.exists(p)) { |
| return readClassFile(p); |
| } |
| } |
| return null; |
| } |
| |
| public Iterable<ClassFile> getClassFiles() throws IOException { |
| final Iterator<ClassFile> iter = new DirectoryIterator(); |
| return new Iterable<ClassFile>() { |
| public Iterator<ClassFile> iterator() { |
| return iter; |
| } |
| }; |
| } |
| |
| private List<Path> walkTree(Path dir) throws IOException { |
| final List<Path> files = new ArrayList<Path>(); |
| Files.walkFileTree(dir, new SimpleFileVisitor<Path>() { |
| public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) |
| throws IOException { |
| if (file.getFileName().toString().endsWith(".class")) { |
| files.add(file); |
| } |
| return FileVisitResult.CONTINUE; |
| } |
| }); |
| return files; |
| } |
| |
| class DirectoryIterator implements Iterator<ClassFile> { |
| private List<Path> entries; |
| private int index = 0; |
| DirectoryIterator() throws IOException { |
| entries = walkTree(path); |
| index = 0; |
| } |
| |
| public boolean hasNext() { |
| return index != entries.size(); |
| } |
| |
| public ClassFile next() { |
| if (!hasNext()) { |
| throw new NoSuchElementException(); |
| } |
| Path path = entries.get(index++); |
| try { |
| return readClassFile(path); |
| } catch (IOException e) { |
| throw new ClassFileError(e); |
| } |
| } |
| |
| public void remove() { |
| throw new UnsupportedOperationException("Not supported yet."); |
| } |
| } |
| } |
| |
| static class JarFileReader extends ClassFileReader { |
| private final JarFile jarfile; |
| JarFileReader(Path path) throws IOException { |
| this(path, new JarFile(path.toFile(), false)); |
| } |
| |
| JarFileReader(Path path, JarFile jf) throws IOException { |
| super(path); |
| this.jarfile = jf; |
| } |
| |
| public ClassFile getClassFile(String name) throws IOException { |
| if (name.indexOf('.') > 0) { |
| int i = name.lastIndexOf('.'); |
| String entryName = name.replace('.', '/') + ".class"; |
| JarEntry e = jarfile.getJarEntry(entryName); |
| if (e == null) { |
| e = jarfile.getJarEntry(entryName.substring(0, i) + "$" |
| + entryName.substring(i + 1, entryName.length())); |
| } |
| if (e != null) { |
| return readClassFile(jarfile, e); |
| } |
| } else { |
| JarEntry e = jarfile.getJarEntry(name + ".class"); |
| if (e != null) { |
| return readClassFile(jarfile, e); |
| } |
| } |
| return null; |
| } |
| |
| protected ClassFile readClassFile(JarFile jarfile, JarEntry e) throws IOException { |
| InputStream is = null; |
| try { |
| is = jarfile.getInputStream(e); |
| return ClassFile.read(is); |
| } catch (ConstantPoolException ex) { |
| throw new ClassFileError(ex); |
| } finally { |
| if (is != null) |
| is.close(); |
| } |
| } |
| |
| public Iterable<ClassFile> getClassFiles() throws IOException { |
| final Iterator<ClassFile> iter = new JarFileIterator(this, jarfile); |
| return new Iterable<ClassFile>() { |
| public Iterator<ClassFile> iterator() { |
| return iter; |
| } |
| }; |
| } |
| } |
| |
| class JarFileIterator implements Iterator<ClassFile> { |
| protected final JarFileReader reader; |
| protected Enumeration<JarEntry> entries; |
| protected JarFile jf; |
| protected JarEntry nextEntry; |
| protected ClassFile cf; |
| JarFileIterator(JarFileReader reader) { |
| this(reader, null); |
| } |
| JarFileIterator(JarFileReader reader, JarFile jarfile) { |
| this.reader = reader; |
| setJarFile(jarfile); |
| } |
| |
| void setJarFile(JarFile jarfile) { |
| if (jarfile == null) return; |
| |
| this.jf = jarfile; |
| this.entries = jf.entries(); |
| this.nextEntry = nextEntry(); |
| } |
| |
| public boolean hasNext() { |
| if (nextEntry != null && cf != null) { |
| return true; |
| } |
| while (nextEntry != null) { |
| try { |
| cf = reader.readClassFile(jf, nextEntry); |
| return true; |
| } catch (ClassFileError | IOException ex) { |
| skippedEntries.add(nextEntry.getName()); |
| } |
| nextEntry = nextEntry(); |
| } |
| return false; |
| } |
| |
| public ClassFile next() { |
| if (!hasNext()) { |
| throw new NoSuchElementException(); |
| } |
| ClassFile classFile = cf; |
| cf = null; |
| nextEntry = nextEntry(); |
| return classFile; |
| } |
| |
| protected JarEntry nextEntry() { |
| while (entries.hasMoreElements()) { |
| JarEntry e = entries.nextElement(); |
| String name = e.getName(); |
| if (name.endsWith(".class")) { |
| return e; |
| } |
| } |
| return null; |
| } |
| |
| public void remove() { |
| throw new UnsupportedOperationException("Not supported yet."); |
| } |
| } |
| } |