/*
* 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.noggit;
/**
*/
public class JSONUtil {
public static final char[] TRUE_CHARS = new char[] {'t','r','u','e'};
public static final char[] FALSE_CHARS = new char[] {'f','a','l','s','e'};
public static final char[] NULL_CHARS = new char[] {'n','u','l','l'};
public static final char[] HEX_CHARS = new char[] {'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'};
public static final char VALUE_SEPARATOR = ',';
public static final char NAME_SEPARATOR = ':';
public static final char OBJECT_START = '{';
public static final char OBJECT_END = '}';
public static final char ARRAY_START = '[';
public static final char ARRAY_END = ']';
public static String toJSON(Object o) {
CharArr out = new CharArr();
new JSONWriter(out).write(o);
return out.toString();
}
/**
* @param o The object to convert to JSON
* @param indentSize The number of space characters to use as an indent (default 2). 0=newlines but no spaces, -1=no indent at all.
* @return Given Object converted to its JSON representation using the given indentSize
*/
public static String toJSON(Object o, int indentSize) {
CharArr out = new CharArr();
new JSONWriter(out,indentSize).write(o);
return out.toString();
}
public static void writeNumber(int number, CharArr out) {
out.write(Integer.toString(number));
}
public static void writeNumber(long number, CharArr out) {
out.write(Long.toString(number));
}
public static void writeNumber(float number, CharArr out) {
out.write(Float.toString(number));
}
public static void writeNumber(double number, CharArr out) {
out.write(Double.toString(number));
}
public static void writeString(CharArr val, CharArr out) {
writeString(val.getArray(), val.getStart(), val.getEnd(), out);
}
public static void writeString(char[] val, int start, int end, CharArr out) {
out.write('"');
writeStringPart(val,start,end,out);
out.write('"');
}
public static void writeString(CharSequence val, int start, int end, CharArr out) {
out.write('"');
writeStringPart(val,start,end,out);
out.write('"');
}
public static void writeStringPart(char[] val, int start, int end, CharArr out) {
for (int i=start; i<end; i++) {
char ch = val[i];
switch(ch) {
case '"':
case '\\':
out.write('\\');
out.write(ch);
break;
case '\r': out.write('\\'); out.write('r'); break;
case '\n': out.write('\\'); out.write('n'); break;
case '\t': out.write('\\'); out.write('t'); break;
case '\b': out.write('\\'); out.write('b'); break;
case '\f': out.write('\\'); out.write('f'); break;
// case '/':
default:
if (ch <= 0x1F) {
unicodeEscape(ch,out);
} else {
// These characters are valid JSON, but not valid JavaScript
if (ch=='\u2028' || ch=='\u2029') {
unicodeEscape(ch,out);
} else {
out.write(ch);
}
}
}
}
}
public static void writeStringPart(CharSequence chars, int start, int end, CharArr out) {
for (int i=start; i<end; i++) {
char ch = chars.charAt(i);
switch(ch) {
case '"':
case '\\':
out.write('\\');
out.write(ch);
break;
case '\r': out.write('\\'); out.write('r'); break;
case '\n': out.write('\\'); out.write('n'); break;
case '\t': out.write('\\'); out.write('t'); break;
case '\b': out.write('\\'); out.write('b'); break;
case '\f': out.write('\\'); out.write('f'); break;
// case '/':
default:
if (ch <= 0x1F) {
unicodeEscape(ch,out);
} else {
// These characters are valid JSON, but not valid JavaScript
if (ch=='\u2028' || ch=='\u2029') {
unicodeEscape(ch,out);
} else {
out.write(ch);
}
}
}
}
}
public static void unicodeEscape(int ch, CharArr out) {
out.write('\\');
out.write('u');
out.write(HEX_CHARS[ch>>>12]);
out.write(HEX_CHARS[(ch>>>8)&0xf]);
out.write(HEX_CHARS[(ch>>>4)&0xf]);
out.write(HEX_CHARS[ch&0xf]);
}
public static void writeNull(CharArr out) {
out.write(NULL_CHARS);
}
public static void writeBoolean(boolean val, CharArr out) {
out.write(val ? TRUE_CHARS : FALSE_CHARS);
}
}