/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.json;
class JSON {
/**
* Returns the input if it is a JSON-permissible value; throws otherwise.
*/
static double checkDouble(
double d)
throws JSONException {
if (
Double.isInfinite(d) ||
Double.isNaN(d)) {
throw new JSONException(
"Forbidden numeric value: " + d);
}
return d;
}
static Boolean toBoolean(Object value) {
if (value
instanceof Boolean) {
return (
Boolean) value;
}
else if (value
instanceof String) {
String stringValue = (String) value;
if (
"true".equalsIgnoreCase(stringValue)) {
return true;
}
else if (
"false".equalsIgnoreCase(stringValue)) {
return false;
}
}
return null;
}
static Double toDouble(Object value) {
if (value
instanceof Double) {
return (
Double) value;
}
else if (value
instanceof Number) {
return ((Number) value).doubleValue();
}
else if (value
instanceof String) {
try {
return Double.valueOf((String) value);
}
catch (NumberFormatException ignored) {
}
}
return null;
}
static Integer toInteger(Object value) {
if (value
instanceof Integer) {
return (Integer) value;
}
else if (value
instanceof Number) {
return ((Number) value).intValue();
}
else if (value
instanceof String) {
try {
return (
int)
Double.parseDouble((String) value);
}
catch (NumberFormatException ignored) {
}
}
return null;
}
static Long toLong(Object value) {
if (value
instanceof Long) {
return (
Long) value;
}
else if (value
instanceof Number) {
return ((Number) value).longValue();
}
else if (value
instanceof String) {
try {
return (
long)
Double.parseDouble((String) value);
}
catch (NumberFormatException ignored) {
}
}
return null;
}
static String toString(Object value) {
if (value
instanceof String) {
return (String) value;
}
else if (value !=
null) {
return String.valueOf(value);
}
return null;
}
public static JSONException typeMismatch(Object indexOrName, Object actual,
String requiredType)
throws JSONException {
if (actual ==
null) {
throw new JSONException(
"Value at " + indexOrName +
" is null.");
}
else {
throw new JSONException(
"Value " + actual +
" at " + indexOrName
+
" of type " + actual.getClass().getName()
+
" cannot be converted to " + requiredType);
}
}
public static JSONException typeMismatch(Object actual, String requiredType)
throws JSONException {
if (actual ==
null) {
throw new JSONException(
"Value is null.");
}
else {
throw new JSONException(
"Value " + actual
+
" of type " + actual.getClass().getName()
+
" cannot be converted to " + requiredType);
}
}
}
