private static int copyDir()

in freemarker-docgen-core/src/main/java/org/freemarker/docgen/core/FileUtil.java [117:164]
44 lines of code
11 McCabe index (conditional complexity)

    private static int copyDir(
            File srcDir, File destDir, File srcBaseDir, Collection<Pattern> ignoredFilePathPatterns)
            throws IOException {
        int fileCounter = 0;
        
        destDir = destDir.getAbsoluteFile();
        srcDir = srcDir.getAbsoluteFile();
        String srcBaseDirPath = ensureEndsWithFileSeparator(srcBaseDir.getAbsolutePath());
        
        if (!destDir.isDirectory()) {
            if (destDir.exists()) {
                throw new IOException("Can't create directory, because a "
                        + "file with the same name already exists: "
                        + destDir.getAbsolutePath());
            }
            if (!destDir.mkdir()) {
                throw new IOException("Failed to create directory: "
                        + destDir.getAbsolutePath());
            }
        }
        
        File[] ls = srcDir.listFiles();
        if (ls == null) {
            throw new IOException("Failed to list directory: "
                    + srcDir.getAbsolutePath());
        }
        for (File f : srcDir.listFiles()) {
            String fName = f.getName(); 
            if (isUsualIgnorableFileOrDirectory(fName) || isDocgenFile(fName)) {
                continue;
            }
            File dest = new File(destDir, fName);
            if (f.isFile()) {
                if (!isIgnoredFile(f, srcBaseDirPath, ignoredFilePathPatterns)) {
                    copyFile(f, dest);
                    fileCounter++;
                }
            } else if (f.isDirectory()) {
                fileCounter += copyDir(f, dest, srcBaseDir, ignoredFilePathPatterns);
            } else {
                throw new IOException(
                        "Failed decide if it's a file or a directory: "
                        + f.getAbsolutePath());
            }
        }
        
        return fileCounter;
    }