public static void processHeaderConfig()

in tika-server/tika-server-core/src/main/java/org/apache/tika/server/core/resource/TikaResource.java [179:264]
76 lines of code
32 McCabe index (conditional complexity)

    public static void processHeaderConfig(Object object, String key, String val, String prefix) {
        try {
            String property = StringUtils.removeStartIgnoreCase(key, prefix);
            Field field = null;
            try {
                field = object
                        .getClass()
                        .getDeclaredField(StringUtils.uncapitalize(property));
            } catch (NoSuchFieldException e) {
                // try to match field case-insensitive way
                for (Field aField : object
                        .getClass()
                        .getDeclaredFields()) {
                    if (aField
                            .getName()
                            .equalsIgnoreCase(property)) {
                        field = aField;
                        break;
                    }
                }
            }
            String setter = field != null ? field.getName() : property;
            setter = "set" + setter
                    .substring(0, 1)
                    .toUpperCase(Locale.US) + setter.substring(1);
            //default assume string class
            //if there's a more specific type, e.g. double, int, boolean
            //try that.
            Class clazz = String.class;
            if (field != null) {
                if (field.getType() == int.class || field.getType() == Integer.class) {
                    clazz = int.class;
                } else if (field.getType() == double.class) {
                    clazz = double.class;
                } else if (field.getType() == Double.class) {
                    clazz = Double.class;
                } else if (field.getType() == float.class) {
                    clazz = float.class;
                } else if (field.getType() == Float.class) {
                    clazz = Float.class;
                } else if (field.getType() == boolean.class) {
                    clazz = boolean.class;
                } else if (field.getType() == Boolean.class) {
                    clazz = Boolean.class;
                } else if (field.getType() == long.class) {
                    clazz = long.class;
                } else if (field.getType() == Long.class) {
                    clazz = Long.class;
                }
            }

            Method m = tryToGetMethod(object, setter, clazz);
            //if you couldn't find more specific setter, back off
            //to string setter and try that.
            if (m == null && clazz != String.class) {
                m = tryToGetMethod(object, setter, String.class);
            }

            if (m != null) {
                if (clazz == String.class) {
                    checkTrustWorthy(setter, val);
                    m.invoke(object, val);
                } else if (clazz == int.class || clazz == Integer.class) {
                    m.invoke(object, Integer.parseInt(val));
                } else if (clazz == double.class || clazz == Double.class) {
                    m.invoke(object, Double.parseDouble(val));
                } else if (clazz == boolean.class || clazz == Boolean.class) {
                    m.invoke(object, Boolean.parseBoolean(val));
                } else if (clazz == float.class || clazz == Float.class) {
                    m.invoke(object, Float.parseFloat(val));
                } else if (clazz == long.class || clazz == Long.class) {
                    m.invoke(object, Long.parseLong(val));
                } else {
                    throw new IllegalArgumentException("setter must be String, int, float, double or boolean...for now");
                }
            } else {
                throw new NoSuchMethodException("Couldn't find: " + setter);
            }

        } catch (Throwable ex) {
            // TIKA-3345
            String error = (!(ex.getCause() instanceof IllegalArgumentException)) ? String.format(Locale.ROOT, "%s is an invalid %s header", key, prefix) :
                    String.format(Locale.ROOT, "%s is an invalid %s header value", val, key);
            throw new WebApplicationException(error, Response.Status.BAD_REQUEST);
        }
    }