netrexxc.java

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    }


    /**
     * Executes the task - performs the actual compiler call.
     * @throws BuildException on error.
     */
    public void execute() throws BuildException {

        // first off, make sure that we've got a srcdir and destdir
        if (srcDir == null || destDir == null) {
            throw new BuildException("srcDir and destDir attributes must be set!");
        }

        // scan source and dest dirs to build up both copy lists and
        // compile lists
        //        scanDir(srcDir, destDir);
        DirectoryScanner ds = getDirectoryScanner(srcDir);

        String[] files = ds.getIncludedFiles();

        scanDir(srcDir, destDir, files);

        // copy the source and support files
        copyFilesToDestination();

        // compile the source files
        if (compileList.size() > 0) {
            log("Compiling " + compileList.size() + " source file"
                 + (compileList.size() == 1 ? "" : "s")
                 + " to " + destDir);
            doNetRexxCompile();
        }
    }


    /**
     * Scans the directory looking for source files to be compiled and support
     * files to be copied.
     */
    private void scanDir(File srcDir, File destDir, String[] files) {
        for (int i = 0; i < files.length; i++) {
            File srcFile = new File(srcDir, files[i]);
            File destFile = new File(destDir, files[i]);
            String filename = files[i];
            // if it's a non source file, copy it if a later date than the
            // dest
            // if it's a source file, see if the destination class file
            // needs to be recreated via compilation
            if (filename.toLowerCase().endsWith(".nrx")) {
                File classFile =
                    new File(destDir,
                    filename.substring(0, filename.lastIndexOf('.')) + ".class");

                if (!compile || srcFile.lastModified() > classFile.lastModified()) {
                    filecopyList.put(srcFile.getAbsolutePath(), destFile.getAbsolutePath());
                    compileList.addElement(destFile.getAbsolutePath());
                }
            } else {
                if (srcFile.lastModified() > destFile.lastModified()) {
                    filecopyList.put(srcFile.getAbsolutePath(), destFile.getAbsolutePath());
                }
            }
        }
    }


    /** Copy eligible files from the srcDir to destDir  */
    private void copyFilesToDestination() {
        if (filecopyList.size() > 0) {
            log("Copying " + filecopyList.size() + " file"
                 + (filecopyList.size() == 1 ? "" : "s")
                 + " to " + destDir.getAbsolutePath());

            Enumeration e = filecopyList.keys();

            while (e.hasMoreElements()) {
                String fromFile = (String) e.nextElement();
                String toFile = (String) filecopyList.get(fromFile);

                try {
                    FileUtils.getFileUtils().copyFile(fromFile, toFile);
                } catch (IOException ioe) {
                    String msg = "Failed to copy " + fromFile + " to " + toFile
                         + " due to " + ioe.getMessage();

                    throw new BuildException(msg, ioe);
                }
            }
        }
    }


    /** Performs a compile using the NetRexx 1.1.x compiler  */
    private void doNetRexxCompile() throws BuildException {
        log("Using NetRexx compiler", Project.MSG_VERBOSE);

        String classpath = getCompileClasspath();
        StringBuffer compileOptions = new StringBuffer();

        // create an array of strings for input to the compiler: one array
        // comes from the compile options, the other from the compileList
        String[] compileOptionsArray = getCompileOptionsAsArray();
        String[] fileListArray = new String[compileList.size()];
        Enumeration e = compileList.elements();
        int j = 0;

        while (e.hasMoreElements()) {
            fileListArray[j] = (String) e.nextElement();
            j++;
        }
        // create a single array of arguments for the compiler
        String[] compileArgs = new String[compileOptionsArray.length + fileListArray.length];

        for (int i = 0; i < compileOptionsArray.length; i++) {
            compileArgs[i] = compileOptionsArray[i];
        }
        for (int i = 0; i < fileListArray.length; i++) {
            compileArgs[i + compileOptionsArray.length] = fileListArray[i];
        }

        // print nice output about what we are doing for the log
        compileOptions.append("Compilation args: ");
        for (int i = 0; i < compileOptionsArray.length; i++) {
            compileOptions.append(compileOptionsArray[i]);
            compileOptions.append(" ");
        }
        log(compileOptions.toString(), Project.MSG_VERBOSE);

        String eol = System.getProperty("line.separator");
        StringBuffer niceSourceList = new StringBuffer("Files to be compiled:" + eol);

        for (int i = 0; i < compileList.size(); i++) {
            niceSourceList.append("    ");
            niceSourceList.append(compileList.elementAt(i).toString());
            niceSourceList.append(eol);
        }

        log(niceSourceList.toString(), Project.MSG_VERBOSE);

        // need to set java.class.path property and restore it later
        // since the NetRexx compiler has no option for the classpath
        String currentClassPath = System.getProperty("java.class.path");
        Properties currentProperties = System.getProperties();

        currentProperties.put("java.class.path", classpath);

        try {
            StringWriter out = new StringWriter();
            int rc =
                COM.ibm.netrexx.process.NetRexxC.main(new Rexx(compileArgs), new PrintWriter(out));
            String sdir = srcDir.getAbsolutePath();
            String ddir = destDir.getAbsolutePath();
            boolean doReplace = !(sdir.equals(ddir));
            int dlen = ddir.length();
            String l;
            BufferedReader in = new BufferedReader(new StringReader(out.toString()));

            log("replacing destdir '" + ddir + "' through sourcedir '"
                + sdir + "'", Project.MSG_VERBOSE);
            while ((l = in.readLine()) != null) {
                int idx;

                while (doReplace && ((idx = l.indexOf(ddir)) != -1)) {
                    // path is mentioned in the message
                    l = (new StringBuffer(l)).replace(idx, idx + dlen, sdir).toString();
                }
                // verbose level logging for suppressed messages
                if (suppressMethodArgumentNotUsed
                    && l.indexOf(MSG_METHOD_ARGUMENT_NOT_USED) != -1) {
                    log(l, Project.MSG_VERBOSE);
                } else if (suppressPrivatePropertyNotUsed
                    && l.indexOf(MSG_PRIVATE_PROPERTY_NOT_USED) != -1) {
                    log(l, Project.MSG_VERBOSE);
                } else if (suppressVariableNotUsed
                    && l.indexOf(MSG_VARIABLE_NOT_USED) != -1) {
                    log(l, Project.MSG_VERBOSE);
                } else if (suppressExceptionNotSignalled
                    && l.indexOf(MSG_EXCEPTION_NOT_SIGNALLED) != -1) {
                    log(l, Project.MSG_VERBOSE);
                } else if (suppressDeprecation
                    && l.indexOf(MSG_DEPRECATION) != -1) {
                    log(l, Project.MSG_VERBOSE);
                } else if (l.indexOf("Error:") != -1) {
                    // error level logging for compiler errors
                    log(l, Project.MSG_ERR);
                } else if (l.indexOf("Warning:") != -1) {
                    // warning for all warning messages
                    log(l, Project.MSG_WARN);
                } else {
                    log(l, Project.MSG_INFO); // info level for the rest.
                }
            }
            if (rc > 1) {
                throw new BuildException("Compile failed, messages should "
                    + "have been provided.");
            }
        } catch (IOException ioe) {
            throw new BuildException("Unexpected IOException while "
                + "playing with Strings", ioe);
        } finally {
            // need to reset java.class.path property
            // since the NetRexx compiler has no option for the classpath
            currentProperties = System.getProperties();
            currentProperties.put("java.class.path", currentClassPath);
        }

    }


    /** Builds the compilation classpath.  */
    private String getCompileClasspath() {
        StringBuffer classpath = new StringBuffer();

        // add dest dir to classpath so that previously compiled and
        // untouched classes are on classpath
        classpath.append(destDir.getAbsolutePath());

        // add our classpath to the mix
        if (this.classpath != null) {
            addExistingToClasspath(classpath, this.classpath);
        }

        // add the system classpath
        // addExistingToClasspath(classpath,System.getProperty("java.class.path"));
        return classpath.toString();
    }


    /** This  */
    private String[] getCompileOptionsAsArray() {
        Vector options = new Vector();

        options.addElement(binary ? "-binary" : "-nobinary");
        options.addElement(comments ? "-comments" : "-nocomments");
        options.addElement(compile ? "-compile" : "-nocompile");
        options.addElement(compact ? "-compact" : "-nocompact");
        options.addElement(console ? "-console" : "-noconsole");
        options.addElement(crossref ? "-crossref" : "-nocrossref");
        options.addElement(decimal ? "-decimal" : "-nodecimal");
        options.addElement(diag ? "-diag" : "-nodiag");
        options.addElement(explicit ? "-explicit" : "-noexplicit");
        options.addElement(format ? "-format" : "-noformat");
        options.addElement(keep ? "-keep" : "-nokeep");
        options.addElement(logo ? "-logo" : "-nologo");
        options.addElement(replace ? "-replace" : "-noreplace");
        options.addElement(savelog ? "-savelog" : "-nosavelog");
        options.addElement(sourcedir ? "-sourcedir" : "-nosourcedir");
        options.addElement(strictargs ? "-strictargs" : "-nostrictargs");
        options.addElement(strictassign ? "-strictassign" : "-nostrictassign");
        options.addElement(strictcase ? "-strictcase" : "-nostrictcase");
        options.addElement(strictimport ? "-strictimport" : "-nostrictimport");
        options.addElement(strictprops ? "-strictprops" : "-nostrictprops");
        options.addElement(strictsignal ? "-strictsignal" : "-nostrictsignal");
        options.addElement(symbols ? "-symbols" : "-nosymbols");
        options.addElement(time ? "-time" : "-notime");
        options.addElement("-" + trace);
        options.addElement(utf8 ? "-utf8" : "-noutf8");
        options.addElement("-" + verbose);

        String[] results = new String[options.size()];

        options.copyInto(results);
        return results;
    }


    /**
     * Takes a classpath-like string, and adds each element of this string to
     * a new classpath, if the components exist. Components that don't exist,
     * aren't added. We do this, because jikes issues warnings for
     * non-existant files/dirs in his classpath, and these warnings are pretty
     * annoying.
     *
     * @param target - target classpath
     * @param source - source classpath to get file objects.
     */
    private void addExistingToClasspath(StringBuffer target, String source) {
        StringTokenizer tok = new StringTokenizer(source,
            System.getProperty("path.separator"), false);

        while (tok.hasMoreTokens()) {
            File f = getProject().resolveFile(tok.nextToken());

            if (f.exists()) {
                target.append(File.pathSeparator);
                target.append(f.getAbsolutePath());
            } else {
                log("Dropping from classpath: "
                    + f.getAbsolutePath(), Project.MSG_VERBOSE);
            }
        }

    }


    /**
     * Enumerated class corresponding to the trace attribute.
     */
    public static class TraceAttr extends EnumeratedAttribute {
        /** {@inheritDoc}. */
        public String[] getValues() {
            return new String[]{"trace", "trace1", "trace2", "notrace"};
        }
    }

    /**
     * Enumerated class corresponding to the verbose attribute.
     */
    public static class VerboseAttr extends EnumeratedAttribute {
        /** {@inheritDoc}. */
        public String[] getValues() {
            return new String[]{"verbose", "verbose0", "verbose1",
                "verbose2", "verbose3", "verbose4",
                "verbose5", "noverbose"};
        }
    }
}