private void checkSettings()

in fop-core/src/main/java/org/apache/fop/cli/CommandLineOptions.java [915:1013]
92 lines of code
33 McCabe index (conditional complexity)

    private void checkSettings() throws FOPException, FileNotFoundException {
        if (inputmode == NOT_SET) {
            throw new FOPException("No input file specified");
        }

        if (outputmode == null) {
            throw new FOPException("No output file specified");
        }

        if ((outputmode.equals(MimeConstants.MIME_FOP_AWT_PREVIEW)
                || outputmode.equals(MimeConstants.MIME_FOP_PRINT))
                    && outfile != null) {
            throw new FOPException("Output file may not be specified "
                    + "for AWT or PRINT output");
        }

        if (inputmode == XSLT_INPUT) {
            // check whether xml *and* xslt file have been set
            if (xmlfile == null && !this.useStdIn) {
                throw new FOPException("XML file must be specified for the transform mode");
            }
            if (xsltfile == null) {
                throw new FOPException("XSLT file must be specified for the transform mode");
            }

            // warning if fofile has been set in xslt mode
            if (fofile != null) {
                log.warn("Can't use fo file with transform mode! Ignoring.\n"
                                       + "Your input is " + "\n xmlfile: "
                                       + xmlfile.getAbsolutePath()
                                       + "\nxsltfile: "
                                       + xsltfile.getAbsolutePath()
                                       + "\n  fofile: "
                                       + fofile.getAbsolutePath());
            }
            if (xmlfile != null && !xmlfile.exists()) {
                throw new FileNotFoundException("Error: xml file "
                                                + xmlfile.getAbsolutePath()
                                                + " not found ");
            }
            if (!xsltfile.exists()) {
                throw new FileNotFoundException("Error: xsl file "
                                                + xsltfile.getAbsolutePath()
                                                + " not found ");
            }

        } else if (inputmode == FO_INPUT) {
            if (outputmode.equals(MimeConstants.MIME_XSL_FO)) {
                throw new FOPException(
                        "FO output mode is only available if you use -xml and -xsl");
            }
            if (fofile != null && !fofile.exists()) {
                throw new FileNotFoundException("Error: fo file "
                                                + fofile.getAbsolutePath()
                                                + " not found ");
            }
        } else if (inputmode == AREATREE_INPUT) {
            if (outputmode.equals(MimeConstants.MIME_XSL_FO)) {
                throw new FOPException(
                        "FO output mode is only available if you use -xml and -xsl");
            } else if (outputmode.equals(MimeConstants.MIME_FOP_AREA_TREE)) {
                throw new FOPException(
                        "Area Tree Output is not available if Area Tree is used as input!");
            }
            if (areatreefile != null && !areatreefile.exists()) {
                throw new FileNotFoundException("Error: area tree file "
                                              + areatreefile.getAbsolutePath()
                                              + " not found ");
            }
        } else if (inputmode == IF_INPUT) {
            if (outputmode.equals(MimeConstants.MIME_XSL_FO)) {
                throw new FOPException(
                        "FO output mode is only available if you use -xml and -xsl");
            } else if (outputmode.equals(MimeConstants.MIME_FOP_AREA_TREE)) {
                throw new FOPException(
                    "Area Tree Output is not available if Intermediate Format"
                    + " is used as input!");
            } else if (outputmode.equals(MimeConstants.MIME_FOP_IF)) {
                throw new FOPException(
                    "Intermediate Output is not available if Intermediate Format"
                    + " is used as input!");
            }
            if (iffile != null && !iffile.exists()) {
                throw new FileNotFoundException("Error: intermediate format file "
                                              + iffile.getAbsolutePath()
                                              + " not found ");
            }
        } else if (inputmode == IMAGE_INPUT) {
            if (outputmode.equals(MimeConstants.MIME_XSL_FO)) {
                throw new FOPException(
                        "FO output mode is only available if you use -xml and -xsl");
            }
            if (imagefile != null && !imagefile.exists()) {
                throw new FileNotFoundException("Error: image file "
                                              + imagefile.getAbsolutePath()
                                              + " not found ");
            }
        }
    }    // end checkSettings