| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.chemistry.opencmis.commons.impl.json; |
| |
| import java.io.IOException; |
| import java.io.Reader; |
| import java.io.StringReader; |
| import java.io.Writer; |
| import java.math.BigDecimal; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.chemistry.opencmis.commons.impl.json.parser.JSONParseException; |
| import org.apache.chemistry.opencmis.commons.impl.json.parser.JSONParser; |
| |
| /** |
| * (Taken from JSON.simple <http://code.google.com/p/json-simple/> and modified |
| * for OpenCMIS.) |
| * |
| * @author FangYidong<fangyidong@yahoo.com.cn> |
| */ |
| public final class JSONValue { |
| |
| private JSONValue() { |
| } |
| |
| /** |
| * Parse JSON text into java object from the input source. Please use |
| * parseWithException() if you don't want to ignore the exception. |
| * |
| * @see org.json.simple.parser.JSONParser#parse(Reader) |
| * @see #parseWithException(Reader) |
| * |
| * @param in |
| * @return Instance of the following: org.json.simple.JSONObject, |
| * org.json.simple.JSONArray, java.lang.String, java.lang.Number, |
| * java.lang.Boolean, null |
| * |
| */ |
| public static Object parse(Reader in) { |
| try { |
| JSONParser parser = new JSONParser(); |
| return parser.parse(in); |
| } catch (Exception e) { |
| return null; |
| } |
| } |
| |
| public static Object parse(String s) { |
| StringReader in = new StringReader(s); |
| return parse(in); |
| } |
| |
| /** |
| * Parse JSON text into java object from the input source. |
| * |
| * @see org.json.simple.parser.JSONParser |
| * |
| * @param in |
| * @return Instance of the following: org.json.simple.JSONObject, |
| * org.json.simple.JSONArray, java.lang.String, java.lang.Number, |
| * java.lang.Boolean, null |
| * |
| * @throws IOException |
| * @throws JSONParseException |
| */ |
| public static Object parseWithException(Reader in) throws IOException, JSONParseException { |
| JSONParser parser = new JSONParser(); |
| return parser.parse(in); |
| } |
| |
| public static Object parseWithException(String s) throws JSONParseException { |
| JSONParser parser = new JSONParser(); |
| return parser.parse(s); |
| } |
| |
| /** |
| * Encode an object into JSON text and write it to out. |
| * <p> |
| * If this object is a Map or a List, and it's also a JSONStreamAware or a |
| * JSONAware, JSONStreamAware or JSONAware will be considered firstly. |
| * <p> |
| * DO NOT call this method from writeJSONString(Writer) of a class that |
| * implements both JSONStreamAware and (Map or List) with "this" as the |
| * first parameter, use JSONObject.writeJSONString(Map, Writer) or |
| * JSONArray.writeJSONString(List, Writer) instead. |
| * |
| * @see org.json.simple.JSONObject#writeJSONString(Map, Writer) |
| * @see org.json.simple.JSONArray#writeJSONString(List, Writer) |
| * |
| * @param value |
| * @param writer |
| */ |
| @SuppressWarnings("unchecked") |
| public static void writeJSONString(Object value, Writer out) throws IOException { |
| if (value == null) { |
| out.write("null"); |
| return; |
| } |
| |
| if (value instanceof String) { |
| out.write('\"'); |
| out.write(escape((String) value)); |
| out.write('\"'); |
| return; |
| } |
| |
| if (value instanceof Double) { |
| if (((Double) value).isInfinite() || ((Double) value).isNaN()) { |
| out.write("null"); |
| } else { |
| out.write(value.toString()); |
| } |
| return; |
| } |
| |
| if (value instanceof Float) { |
| if (((Float) value).isInfinite() || ((Float) value).isNaN()) { |
| out.write("null"); |
| } else { |
| out.write(value.toString()); |
| } |
| return; |
| } |
| |
| if (value instanceof BigDecimal) { |
| out.write(((BigDecimal) value).toPlainString()); |
| return; |
| } |
| |
| if (value instanceof Number) { |
| out.write(value.toString()); |
| return; |
| } |
| |
| if (value instanceof Boolean) { |
| out.write(value.toString()); |
| return; |
| } |
| |
| if (value instanceof JSONStreamAware) { |
| ((JSONStreamAware) value).writeJSONString(out); |
| return; |
| } |
| |
| if (value instanceof JSONAware) { |
| out.write(((JSONAware) value).toJSONString()); |
| return; |
| } |
| |
| if (value instanceof Map) { |
| JSONObject.writeJSONString((Map<String, Object>) value, out); |
| return; |
| } |
| |
| if (value instanceof List) { |
| JSONArray.writeJSONString((List<Object>) value, out); |
| return; |
| } |
| |
| out.write(value.toString()); |
| } |
| |
| /** |
| * Converts an object to JSON text. |
| * <p> |
| * If this object is a Map or a List, and it's also a JSONAware, JSONAware |
| * will be considered firstly. |
| * <p> |
| * DO NOT call this method from toJSONString() of a class that implements |
| * both JSONAware and Map or List with "this" as the parameter, use |
| * JSONObject.toJSONString(Map) or JSONArray.toJSONString(List) instead. |
| * |
| * @see org.json.simple.JSONObject#toJSONString(Map) |
| * @see org.json.simple.JSONArray#toJSONString(List) |
| * |
| * @param value |
| * @return JSON text, or "null" if value is null or it's an NaN or an INF |
| * number. |
| */ |
| public static String toJSONString(Object value) { |
| StringBuilder sb = new StringBuilder(1024); |
| addJSONString(value, sb); |
| return sb.toString(); |
| } |
| |
| /** |
| * Converts an object to JSON text and attach it the the given |
| * StringBuilder. |
| * |
| * @see #toJSONString(Object) |
| */ |
| @SuppressWarnings("unchecked") |
| public static void addJSONString(Object value, StringBuilder sb) { |
| if (value == null) { |
| sb.append("null"); |
| return; |
| } |
| |
| if (value instanceof String) { |
| sb.append('\"'); |
| escape((String) value, sb); |
| sb.append('\"'); |
| return; |
| } |
| |
| if (value instanceof Double) { |
| if (((Double) value).isInfinite() || ((Double) value).isNaN()) { |
| sb.append("null"); |
| } else { |
| sb.append(value.toString()); |
| } |
| return; |
| } |
| |
| if (value instanceof Float) { |
| if (((Float) value).isInfinite() || ((Float) value).isNaN()) { |
| sb.append("null"); |
| } else { |
| sb.append(value.toString()); |
| } |
| return; |
| } |
| |
| if (value instanceof BigDecimal) { |
| sb.append(((BigDecimal) value).toPlainString()); |
| return; |
| } |
| |
| if (value instanceof Number) { |
| sb.append(value.toString()); |
| return; |
| } |
| |
| if (value instanceof Boolean) { |
| sb.append(value.toString()); |
| return; |
| } |
| |
| if (value instanceof JSONAware) { |
| sb.append(((JSONAware) value).toJSONString()); |
| return; |
| } |
| |
| if (value instanceof Map) { |
| JSONObject.addJSONString((Map<String, Object>) value, sb); |
| return; |
| } |
| |
| if (value instanceof List) { |
| JSONArray.addJSONString((List<Object>) value, sb); |
| return; |
| } |
| |
| sb.append(value.toString()); |
| } |
| |
| /** |
| * Escape quotes, \, /, \r, \n, \b, \f, \t and other control characters |
| * (U+0000 through U+001F). |
| * |
| * @param s |
| * @return |
| */ |
| public static String escape(String s) { |
| if (s == null) { |
| return null; |
| } |
| |
| StringBuilder sb = new StringBuilder(s.length() + 16); |
| escape(s, sb); |
| return sb.toString(); |
| } |
| |
| /** |
| * @param s |
| * - Must not be null. |
| * @param sb |
| */ |
| static void escape(String s, StringBuilder sb) { |
| final int n = s.length(); |
| for (int i = 0; i < n; i++) { |
| char ch = s.charAt(i); |
| switch (ch) { |
| case '"': |
| sb.append("\\\""); |
| break; |
| case '\\': |
| sb.append("\\\\"); |
| break; |
| case '\b': |
| sb.append("\\b"); |
| break; |
| case '\f': |
| sb.append("\\f"); |
| break; |
| case '\n': |
| sb.append("\\n"); |
| break; |
| case '\r': |
| sb.append("\\r"); |
| break; |
| case '\t': |
| sb.append("\\t"); |
| break; |
| case '/': |
| sb.append("\\/"); |
| break; |
| default: |
| // Reference: http://www.unicode.org/versions/Unicode5.1.0/ |
| if ((ch >= '\u0000' && ch <= '\u001F') || (ch >= '\u007F' && ch <= '\u009F') |
| || (ch >= '\u2000' && ch <= '\u20FF')) { |
| String ss = Integer.toHexString(ch); |
| sb.append("\\u"); |
| for (int k = 0; k < 4 - ss.length(); k++) { |
| sb.append('0'); |
| } |
| sb.append(ss.toUpperCase()); |
| } else { |
| sb.append(ch); |
| } |
| } |
| }// for |
| } |
| } |