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Java Source | 2000-05-25 | 9.6 KB | 295 lines |
- //: ClassScanner.java
- //////////////////////////////////////////////////
- // Copyright (c) Bruce Eckel, 1998
- // Source code file from the book "Thinking in Java"
- // All rights reserved EXCEPT as allowed by the
- // following statements: You can freely use this file
- // for your own work (personal or commercial),
- // including modifications and distribution in
- // executable form only. Permission is granted to use
- // this file in classroom situations, including its
- // use in presentation materials, as long as the book
- // "Thinking in Java" is cited as the source.
- // Except in classroom situations, you cannot copy
- // and distribute this code; instead, the sole
- // distribution point is http://www.BruceEckel.com
- // (and official mirror sites) where it is
- // freely available. You cannot remove this
- // copyright and notice. You cannot distribute
- // modified versions of the source code in this
- // package. You cannot use this file in printed
- // media without the express permission of the
- // author. Bruce Eckel makes no representation about
- // the suitability of this software for any purpose.
- // It is provided "as is" without express or implied
- // warranty of any kind, including any implied
- // warranty of merchantability, fitness for a
- // particular purpose or non-infringement. The entire
- // risk as to the quality and performance of the
- // software is with you. Bruce Eckel and the
- // publisher shall not be liable for any damages
- // suffered by you or any third party as a result of
- // using or distributing software. In no event will
- // Bruce Eckel or the publisher be liable for any
- // lost revenue, profit, or data, or for direct,
- // indirect, special, consequential, incidental, or
- // punitive damages, however caused and regardless of
- // the theory of liability, arising out of the use of
- // or inability to use software, even if Bruce Eckel
- // and the publisher have been advised of the
- // possibility of such damages. Should the software
- // prove defective, you assume the cost of all
- // necessary servicing, repair, or correction. If you
- // think you've found an error, please email all
- // modified files with clearly commented changes to:
- // Bruce@EckelObjects.com. (Please use the same
- // address for non-code errors found in the book.)
- /////////////////////////////////////////////////
-
- // Scans all files in directory for classes
- // and identifiers, to check capitalization.
- // Assumes properly compiling code listings.
- // Doesn't do everything right, but is a very
- // useful aid.
- import java.io.*;
- import java.util.*;
-
- class MultiStringMap extends Hashtable {
- public void add(String key, String value) {
- if(!containsKey(key))
- put(key, new Vector());
- ((Vector)get(key)).addElement(value);
- }
- public Vector getVector(String key) {
- if(!containsKey(key)) {
- System.err.println(
- "ERROR: can't find key: " + key);
- System.exit(1);
- }
- return (Vector)get(key);
- }
- public void printValues(PrintStream p) {
- Enumeration k = keys();
- while(k.hasMoreElements()) {
- String oneKey = (String)k.nextElement();
- Vector val = getVector(oneKey);
- for(int i = 0; i < val.size(); i++)
- p.println((String)val.elementAt(i));
- }
- }
- }
-
- public class ClassScanner {
- private File path;
- private String[] fileList;
- private Properties classes = new Properties();
- private MultiStringMap
- classMap = new MultiStringMap(),
- identMap = new MultiStringMap();
- private StreamTokenizer in;
- public ClassScanner() {
- path = new File(".");
- fileList = path.list(new JavaFilter());
- for(int i = 0; i < fileList.length; i++) {
- System.out.println(fileList[i]);
- scanListing(fileList[i]);
- }
- }
- void scanListing(String fname) {
- try {
- in = new StreamTokenizer(
- new BufferedReader(
- new FileReader(fname)));
- // Doesn't seem to work:
- // in.slashStarComments(true);
- // in.slashSlashComments(true);
- in.ordinaryChar('/');
- in.ordinaryChar('.');
- in.wordChars('_', '_');
- in.eolIsSignificant(true);
- while(in.nextToken() !=
- StreamTokenizer.TT_EOF) {
- if(in.ttype == '/')
- eatComments();
- else if(in.ttype ==
- StreamTokenizer.TT_WORD) {
- if(in.sval.equals("class") ||
- in.sval.equals("interface")) {
- // Get class name:
- while(in.nextToken() !=
- StreamTokenizer.TT_EOF
- && in.ttype !=
- StreamTokenizer.TT_WORD)
- ;
- classes.put(in.sval, in.sval);
- classMap.add(fname, in.sval);
- }
- if(in.sval.equals("import") ||
- in.sval.equals("package"))
- discardLine();
- else // It's an identifier or keyword
- identMap.add(fname, in.sval);
- }
- }
- } catch(IOException e) {
- e.printStackTrace();
- }
- }
- void discardLine() {
- try {
- while(in.nextToken() !=
- StreamTokenizer.TT_EOF
- && in.ttype !=
- StreamTokenizer.TT_EOL)
- ; // Throw away tokens to end of line
- } catch(IOException e) {
- e.printStackTrace();
- }
- }
- // StreamTokenizer's comment removal seemed
- // to be broken. This extracts them:
- void eatComments() {
- try {
- if(in.nextToken() !=
- StreamTokenizer.TT_EOF) {
- if(in.ttype == '/')
- discardLine();
- else if(in.ttype != '*')
- in.pushBack();
- else
- while(true) {
- if(in.nextToken() ==
- StreamTokenizer.TT_EOF)
- break;
- if(in.ttype == '*')
- if(in.nextToken() !=
- StreamTokenizer.TT_EOF
- && in.ttype == '/')
- break;
- }
- }
- } catch(IOException e) {
- e.printStackTrace();
- }
- }
- public String[] classNames() {
- String[] result = new String[classes.size()];
- Enumeration e = classes.keys();
- int i = 0;
- while(e.hasMoreElements())
- result[i++] = (String)e.nextElement();
- return result;
- }
- public void checkClassNames() {
- Enumeration files = classMap.keys();
- while(files.hasMoreElements()) {
- String file = (String)files.nextElement();
- Vector cls = classMap.getVector(file);
- for(int i = 0; i < cls.size(); i++) {
- String className =
- (String)cls.elementAt(i);
- if(Character.isLowerCase(
- className.charAt(0)))
- System.out.println(
- "class capitalization error, file: "
- + file + ", class: "
- + className);
- }
- }
- }
- public void checkIdentNames() {
- Enumeration files = identMap.keys();
- Vector reportSet = new Vector();
- while(files.hasMoreElements()) {
- String file = (String)files.nextElement();
- Vector ids = identMap.getVector(file);
- for(int i = 0; i < ids.size(); i++) {
- String id =
- (String)ids.elementAt(i);
- if(!classes.contains(id)) {
- // Ignore identifiers of length 3 or
- // longer that are all uppercase
- // (probably static final values):
- if(id.length() >= 3 &&
- id.equals(
- id.toUpperCase()))
- continue;
- // Check to see if first char is upper:
- if(Character.isUpperCase(id.charAt(0))){
- if(reportSet.indexOf(file + id)
- == -1){ // Not reported yet
- reportSet.addElement(file + id);
- System.out.println(
- "Ident capitalization error in:"
- + file + ", ident: " + id);
- }
- }
- }
- }
- }
- }
- static final String usage =
- "Usage: \n" +
- "ClassScanner classnames -a\n" +
- "\tAdds all the class names in this \n" +
- "\tdirectory to the repository file \n" +
- "\tcalled 'classnames'\n" +
- "ClassScanner classnames\n" +
- "\tChecks all the java files in this \n" +
- "\tdirectory for capitalization errors, \n" +
- "\tusing the repository file 'classnames'";
- private static void usage() {
- System.err.println(usage);
- System.exit(1);
- }
- public static void main(String[] args) {
- if(args.length < 1 || args.length > 2)
- usage();
- ClassScanner c = new ClassScanner();
- File old = new File(args[0]);
- if(old.exists()) {
- try {
- // Try to open an existing
- // properties file:
- InputStream oldlist =
- new BufferedInputStream(
- new FileInputStream(old));
- c.classes.load(oldlist);
- oldlist.close();
- } catch(IOException e) {
- System.err.println("Could not open "
- + old + " for reading");
- System.exit(1);
- }
- }
- if(args.length == 1) {
- c.checkClassNames();
- c.checkIdentNames();
- }
- // Write the class names to a repository:
- if(args.length == 2) {
- if(!args[1].equals("-a"))
- usage();
- try {
- BufferedOutputStream out =
- new BufferedOutputStream(
- new FileOutputStream(args[0]));
- c.classes.save(out,
- "Classes found by ClassScanner.java");
- out.close();
- } catch(IOException e) {
- System.err.println(
- "Could not write " + args[0]);
- System.exit(1);
- }
- }
- }
- }
-
- class JavaFilter implements FilenameFilter {
- public boolean accept(File dir, String name) {
- // Strip path information:
- String f = new File(name).getName();
- return f.trim().endsWith(".java");
- }
- } ///:~