/**
* Copyright (c) 2011-2013, James Zhan 詹波 (jfinal@126.com).
*
* 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 net.tooan.ynpay.third.jfinal.kit;
import net.tooan.ynpay.third.jfinal.plugin.activerecord.CPI;
import net.tooan.ynpay.third.jfinal.plugin.activerecord.Model;
import net.tooan.ynpay.third.jfinal.plugin.activerecord.Record;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.*;
/**
* Convert object to json string.
* <p/>
* Json java
* string java.lang.String
* number java.lang.Number
* true|false java.lang.Boolean
* null null
* array java.util.List
* object java.util.Map
*/
@SuppressWarnings({"rawtypes", "unchecked"})
public class JsonKit {
private static int convertDepth = 8;
private static String timestampPattern = "yyyy-MM-dd HH:mm:ss";
private static String datePattern = "yyyy-MM-dd";
public static void setConvertDepth(int convertDepth) {
if (convertDepth < 2)
throw new IllegalArgumentException("convert depth can not less than 2.");
JsonKit.convertDepth = convertDepth;
}
public static void setTimestampPattern(String timestampPattern) {
if (timestampPattern == null || "".equals(timestampPattern.trim()))
throw new IllegalArgumentException("timestampPattern can not be blank.");
JsonKit.timestampPattern = timestampPattern;
}
public static void setDatePattern(String datePattern) {
if (datePattern == null || "".equals(datePattern.trim()))
throw new IllegalArgumentException("datePattern can not be blank.");
JsonKit.datePattern = datePattern;
}
public static String mapToJson(Map map, int depth) {
if (map == null)
return "null";
StringBuilder sb = new StringBuilder();
boolean first = true;
Iterator iter = map.entrySet().iterator();
sb.append('{');
while (iter.hasNext()) {
if (first)
first = false;
else
sb.append(',');
Map.Entry entry = (Map.Entry) iter.next();
toKeyValue(String.valueOf(entry.getKey()), entry.getValue(), sb, depth);
}
sb.append('}');
return sb.toString();
}
private static String toKeyValue(String key, Object value, StringBuilder sb, int depth) {
sb.append('\"');
if (key == null)
sb.append("null");
else
escape(key, sb);
sb.append('\"').append(':');
sb.append(toJson(value, depth));
return sb.toString();
}
public static String listToJson(List list, int depth) {
if (list == null)
return "null";
boolean first = true;
StringBuilder sb = new StringBuilder();
Iterator iter = list.iterator();
sb.append('[');
while (iter.hasNext()) {
if (first)
first = false;
else
sb.append(',');
Object value = iter.next();
if (value == null) {
sb.append("null");
continue;
}
sb.append(toJson(value, depth));
}
sb.append(']');
return sb.toString();
}
/**
* Escape quotes, \, /, \r, \n, \b, \f, \t and other control characters (U+0000 through U+001F).
*/
private static String escape(String s) {
if (s == null)
return null;
StringBuilder sb = new StringBuilder();
escape(s, sb);
return sb.toString();
}
private static void escape(String s, StringBuilder sb) {
for (int i = 0; i < s.length(); 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:
if ((ch >= '\u0000' && ch <= '\u001F') || (ch >= '\u007F' && ch <= '\u009F') || (ch >= '\u2000' && ch <= '\u20FF')) {
String str = Integer.toHexString(ch);
sb.append("\\u");
for (int k = 0; k < 4 - str.length(); k++) {
sb.append('0');
}
sb.append(str.toUpperCase());
} else {
sb.append(ch);
}
}
}
}
public static String toJson(Object value) {
return toJson(value, convertDepth);
}
public static String toJson(Object value, int depth) {
if (value == null || (depth--) <= 0)
return "null";
if (value instanceof String)
return "\"" + escape((String) value) + "\"";
if (value instanceof Double) {
if (((Double) value).isInfinite() || ((Double) value).isNaN())
return "null";
else
return value.toString();
}
if (value instanceof Float) {
if (((Float) value).isInfinite() || ((Float) value).isNaN())
return "null";
else
return value.toString();
}
if (value instanceof Number)
return value.toString();
if (value instanceof Boolean)
return value.toString();
if (value instanceof java.util.Date) {
if (value instanceof java.sql.Timestamp)
return "\"" + new SimpleDateFormat(timestampPattern).format(value) + "\"";
if (value instanceof java.sql.Time)
return "\"" + value.toString() + "\"";
return "\"" + new SimpleDateFormat(datePattern).format(value) + "\"";
}
if (value instanceof Map) {
return mapToJson((Map) value, depth);
}
if (value instanceof List) {
return listToJson((List) value, depth);
}
String result = otherToJson(value, depth);
if (result != null)
return result;
// 类型无法处理时当作字符串处理,否则ajax调用返回时js无法解析
// return value.toString();
return "\"" + escape(value.toString()) + "\"";
}
private static String otherToJson(Object value, int depth) {
if (value instanceof Character) {
return "\"" + escape(value.toString()) + "\"";
}
if (value instanceof Model) {
Map map = CPI.getAttrs((Model) value);
return mapToJson(map, depth);
}
if (value instanceof Record) {
Map map = ((Record) value).getColumns();
return mapToJson(map, depth);
}
if (value instanceof Object[]) {
Object[] arr = (Object[]) value;
List list = new ArrayList(arr.length);
for (int i = 0; i < arr.length; i++)
list.add(arr[i]);
return listToJson(list, depth);
}
if (value instanceof Enum) {
return "\"" + ((Enum) value).name() + "\"";
}
return beanToJson(value, depth);
}
private static String beanToJson(Object model, int depth) {
Map map = new HashMap();
Method[] methods = model.getClass().getMethods();
for (Method m : methods) {
String methodName = m.getName();
int indexOfGet = methodName.indexOf("get");
if (indexOfGet == 0 && methodName.length() > 3) { // Only getter
String attrName = methodName.substring(3);
if (!attrName.equals("Class")) { // Ignore Object.getClass()
Class<?>[] types = m.getParameterTypes();
if (types.length == 0) {
try {
Object value = m.invoke(model);
map.put(StringKit.firstCharToLowerCase(attrName), value);
} catch (Exception e) {
throw new RuntimeException(e.getMessage(), e);
}
}
}
} else {
int indexOfIs = methodName.indexOf("is");
if (indexOfIs == 0 && methodName.length() > 2) {
String attrName = methodName.substring(2);
Class<?>[] types = m.getParameterTypes();
if (types.length == 0) {
try {
Object value = m.invoke(model);
map.put(StringKit.firstCharToLowerCase(attrName), value);
} catch (Exception e) {
throw new RuntimeException(e.getMessage(), e);
}
}
}
}
}
return mapToJson(map, depth);
}
}