protected InputSource getInputSourceFromObj()

in jelly-tags/xml/src/main/java/org/apache/commons/jelly/tags/xml/TransformTag.java [310:351]
41 lines of code
8 McCabe index (conditional complexity)

    protected InputSource getInputSourceFromObj(Object sourceObj ) {
        InputSource xmlInputSource = null;
        if (sourceObj instanceof Document) {
            SAXSource saxSource = new DocumentSource((Document) sourceObj);
            xmlInputSource = saxSource.getInputSource();
        } else {
            if (sourceObj instanceof String) {
                String uri = (String) sourceObj;
                xmlInputSource = new InputSource(context.getResourceAsStream(uri));
            }
            else if (sourceObj instanceof Reader) {
                xmlInputSource = new InputSource((Reader) sourceObj);
            }
            else if (sourceObj instanceof InputStream) {
                xmlInputSource = new InputSource((InputStream) sourceObj);
            }
            else if (sourceObj instanceof URL) {
                String uri = ((URL) sourceObj).toString();
                xmlInputSource = new InputSource(context.getResourceAsStream(uri));
            }
            else if (sourceObj instanceof File) {
                try {
                    String uri = ((File) sourceObj).toURL().toString();
                    xmlInputSource = new InputSource(context.getResourceAsStream(uri));
                }
                catch (MalformedURLException e) {
                    throw new IllegalArgumentException(
                        "This should never occur. We should always be able to convert a File to a URL" + e );
                }
            }
            else {
                throw new IllegalArgumentException(
                    "Invalid source argument. Must be a String, Reader, InputStream or URL."
                        + " Was type; "
                        + sourceObj.getClass().getName()
                        + " with value: "
                        + sourceObj);
            }
        }

        return xmlInputSource;
    }