public Object execute()

in gshell-commands/gshell-text/src/main/java/org/apache/geronimo/gshell/commands/text/GrepAction.java [84:143]
47 lines of code
8 McCabe index (conditional complexity)

    public Object execute(final CommandContext context) throws Exception {
        assert context != null;
        final IO io = context.getIo();

        PatternCompiler compiler = new Perl5Compiler();
        InvertableMatcher matcher = new InvertableMatcher(new Perl5Matcher());
        MatchActionProcessor processor = new MatchActionProcessor(compiler, matcher);

        try {
            int options = Perl5Compiler.DEFAULT_MASK;

            if (ignoreCase) {
                options = Perl5Compiler.CASE_INSENSITIVE_MASK;
            }

            processor.addAction(pattern, options, new MatchAction() {
                public void processMatch(final MatchActionInfo info) {
                    matches++;

                    // Render output unless --count was configured
                    if (!count) {
                        StringBuilder buff = new StringBuilder();

                        if (lineNumbers) {
                            buff.append(info.lineNumber);
                            buff.append(":");
                        }

                        buff.append(info.line);

                        io.info(buff.toString());
                    }
                }
            });
        }
        catch (MalformedPatternException e) {
            io.error("Invalid pattern: " + e, e);
            return CommandAction.Result.FAILURE;
        }

        if (path != null) {
            FileObject file = resolveFile(context, path);

            try {
                grep(context, processor, file);
            }
            finally {
                FileObjects.close(file);
            }
        }
        else {
            processor.processMatches(context.getIo().inputStream, context.getIo().outputStream);
        }

        if (count) {
            io.info("{}", matches);
        }

        return matches != 0 ? FOUND: NOT_FOUND;
    }