1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package org.json; 18 19 class JSON { 20 /** 21 * Returns the input if it is a JSON-permissible value; throws otherwise. 22 */ checkDouble(double d)23 static double checkDouble(double d) throws JSONException { 24 if (Double.isInfinite(d) || Double.isNaN(d)) { 25 throw new JSONException("Forbidden numeric value: " + d); 26 } 27 return d; 28 } 29 toBoolean(Object value)30 static Boolean toBoolean(Object value) { 31 if (value instanceof Boolean) { 32 return (Boolean) value; 33 } else if (value instanceof String) { 34 String stringValue = (String) value; 35 if ("true".equalsIgnoreCase(stringValue)) { 36 return true; 37 } else if ("false".equalsIgnoreCase(stringValue)) { 38 return false; 39 } 40 } 41 return null; 42 } 43 toDouble(Object value)44 static Double toDouble(Object value) { 45 if (value instanceof Double) { 46 return (Double) value; 47 } else if (value instanceof Number) { 48 return ((Number) value).doubleValue(); 49 } else if (value instanceof String) { 50 try { 51 return Double.valueOf((String) value); 52 } catch (NumberFormatException ignored) { 53 } 54 } 55 return null; 56 } 57 toInteger(Object value)58 static Integer toInteger(Object value) { 59 if (value instanceof Integer) { 60 return (Integer) value; 61 } else if (value instanceof Number) { 62 return ((Number) value).intValue(); 63 } else if (value instanceof String) { 64 try { 65 return (int) Double.parseDouble((String) value); 66 } catch (NumberFormatException ignored) { 67 } 68 } 69 return null; 70 } 71 toLong(Object value)72 static Long toLong(Object value) { 73 if (value instanceof Long) { 74 return (Long) value; 75 } else if (value instanceof Number) { 76 return ((Number) value).longValue(); 77 } else if (value instanceof String) { 78 try { 79 return (long) Double.parseDouble((String) value); 80 } catch (NumberFormatException ignored) { 81 } 82 } 83 return null; 84 } 85 toString(Object value)86 static String toString(Object value) { 87 if (value instanceof String) { 88 return (String) value; 89 } else if (value != null) { 90 return String.valueOf(value); 91 } 92 return null; 93 } 94 typeMismatch(Object indexOrName, Object actual, String requiredType)95 public static JSONException typeMismatch(Object indexOrName, Object actual, 96 String requiredType) throws JSONException { 97 if (actual == null) { 98 throw new JSONException("Value at " + indexOrName + " is null."); 99 } else { 100 throw new JSONException("Value " + actual + " at " + indexOrName 101 + " of type " + actual.getClass().getName() 102 + " cannot be converted to " + requiredType); 103 } 104 } 105 typeMismatch(Object actual, String requiredType)106 public static JSONException typeMismatch(Object actual, String requiredType) 107 throws JSONException { 108 if (actual == null) { 109 throw new JSONException("Value is null."); 110 } else { 111 throw new JSONException("Value " + actual 112 + " of type " + actual.getClass().getName() 113 + " cannot be converted to " + requiredType); 114 } 115 } 116 } 117