package com.intellectualcrafters.json;
import java.util.Iterator;
/**
* This provides static methods to convert an XML text into a JSONArray or JSONObject, and to covert a JSONArray or
* JSONObject into an XML text using the JsonML transform.
*
* @author JSON.org
* @version 2014-05-03
*/
public class JSONML {
/**
* Parse XML values and store them in a JSONArray.
*
* @param x The XMLTokener containing the source string.
* @param arrayForm true if array form, false if object form.
* @param ja The JSONArray that is containing the current tag or null if we are at the outermost level.
*
* @return A JSONArray if the value is the outermost tag, otherwise null.
*
* @throws JSONException
*/
private static Object parse(XMLTokener x, boolean arrayForm, JSONArray ja) throws JSONException {
String attribute;
char c;
String closeTag = null;
int i;
JSONArray newja = null;
JSONObject newjo = null;
Object token;
String tagName = null;
// Test for and skip past these forms:
// <!-- ... -->
// <![ ... ]]>
// <! ... >
// <? ... ?>
while (true) {
if (!x.more()) {
throw x.syntaxError("Bad XML");
}
token = x.nextContent();
if (token == XML.LT) {
token = x.nextToken();
if (token instanceof Character) {
if (token == XML.SLASH) {
// Close tag </
token = x.nextToken();
if (!(token instanceof String)) {
throw new JSONException("Expected a closing name instead of '" + token + "'.");
}
if (x.nextToken() != XML.GT) {
throw x.syntaxError("Misshaped close tag");
}
return token;
} else if (token == XML.BANG) {
// <!
c = x.next();
if (c == '-') {
if (x.next() == '-') {
x.skipPast("-->");
} else {
x.back();
}
} else if (c == '[') {
token = x.nextToken();
if (token.equals("CDATA") && (x.next() == '[')) {
if (ja != null) {
ja.put(x.nextCDATA());
}
} else {
throw x.syntaxError("Expected 'CDATA['");
}
} else {
i = 1;
do {
token = x.nextMeta();
if (token == null) {
throw x.syntaxError("Missing '>' after '<!'.");
} else if (token == XML.LT) {
i += 1;
} else if (token == XML.GT) {
i -= 1;
}
} while (i > 0);
}
} else if (token == XML.QUEST) {
// <?
x.skipPast("?>");
} else {
throw x.syntaxError("Misshaped tag");
}
// Open tag <
} else {
if (!(token instanceof String)) {
throw x.syntaxError("Bad tagName '" + token + "'.");
}
tagName = (String) token;
newja = new JSONArray();
newjo = new JSONObject();
if (arrayForm) {
newja.put(tagName);
if (ja != null) {
ja.put(newja);
}
} else {
newjo.put("tagName", tagName);
if (ja != null) {
ja.put(newjo);
}
}
token = null;
for (;;) {
if (token == null) {
token = x.nextToken();
}
if (!(token instanceof String)) {
break;
}
// attribute = value
attribute = (String) token;
if (!arrayForm && ("tagName".equals(attribute) || "childNode".equals(attribute))) {
throw x.syntaxError("Reserved attribute.");
}
token = x.nextToken();
if (token == XML.EQ) {
token = x.nextToken();
if (!(token instanceof String)) {
throw x.syntaxError("Missing value");
}
newjo.accumulate(attribute, XML.stringToValue((String) token));
token = null;
} else {
newjo.accumulate(attribute, "");
}
}
if (arrayForm && (newjo.length() > 0)) {
newja.put(newjo);
}
// Empty tag <.../>
if (token == XML.SLASH) {
if (x.nextToken() != XML.GT) {
throw x.syntaxError("Misshaped tag");
}
if (ja == null) {
if (arrayForm) {
return newja;
} else {
return newjo;
}
}
// Content, between <...> and </...>
} else {
if (token != XML.GT) {
throw x.syntaxError("Misshaped tag");
}
closeTag = (String) parse(x, arrayForm, newja);
if (closeTag != null) {
if (!closeTag.equals(tagName)) {
throw x.syntaxError("Mismatched '" + tagName + "' and '" + closeTag + "'");
}
tagName = null;
if (!arrayForm && (newja.length() > 0)) {
newjo.put("childNodes", newja);
}
if (ja == null) {
if (arrayForm) {
return newja;
} else {
return newjo;
}
}
}
}
}
} else {
if (ja != null) {
ja.put(token instanceof String ? XML.stringToValue((String) token) : token);
}
}
}
}
/**
* Convert a well-formed (but not necessarily valid) XML string into a JSONArray using the JsonML transform. Each
* XML tag is represented as a JSONArray in which the first element is the tag name. If the tag has attributes, then
* the second element will be JSONObject containing the name/value pairs. If the tag contains children, then strings
*
* @param string The source string.
*
* @return A JSONArray containing the structured data from the XML string.
*
* @throws JSONException
*/
public static JSONArray toJSONArray(String string) throws JSONException {
return toJSONArray(new XMLTokener(string));
}
/**
* Convert a well-formed (but not necessarily valid) XML string into a JSONArray using the JsonML transform. Each
* XML tag is represented as a JSONArray in which the first element is the tag name. If the tag has attributes, then
* the second element will be JSONObject containing the name/value pairs. If the tag contains children, then strings
* and JSONArrays will represent the child content and tags. Comments, prologs, DTDs, and <code><[ [ ]]></code>
* are ignored.
*
* @param x An XMLTokener.
*
* @return A JSONArray containing the structured data from the XML string.
*
* @throws JSONException
*/
public static JSONArray toJSONArray(XMLTokener x) throws JSONException {
return (JSONArray) parse(x, true, null);
}
/**
* Convert a well-formed (but not necessarily valid) XML string into a JSONObject using the JsonML transform. Each
* XML tag is represented as a JSONObject with a "tagName" property. If the tag has attributes, then the attributes
* will be in the JSONObject as properties. If the tag contains children, the object will have a "childNodes"
* property which will be an array of strings and JsonML JSONObjects.
*
* Comments, prologs, DTDs, and <code><[ [ ]]></code> are ignored.
*
* @param x An XMLTokener of the XML source text.
*
* @return A JSONObject containing the structured data from the XML string.
*
* @throws JSONException
*/
public static JSONObject toJSONObject(XMLTokener x) throws JSONException {
return (JSONObject) parse(x, false, null);
}
/**
* Convert a well-formed (but not necessarily valid) XML string into a JSONObject using the JsonML transform. Each
* XML tag is represented as a JSONObject with a "tagName" property. If the tag has attributes, then the attributes
* will be in the JSONObject as properties. If the tag contains children, the object will have a "childNodes"
* property which will be an array of strings and JsonML JSONObjects.
*
* Comments, prologs, DTDs, and <code><[ [ ]]></code> are ignored.
*
* @param string The XML source text.
*
* @return A JSONObject containing the structured data from the XML string.
*
* @throws JSONException
*/
public static JSONObject toJSONObject(String string) throws JSONException {
return toJSONObject(new XMLTokener(string));
}
/**
* Reverse the JSONML transformation, making an XML text from a JSONArray.
*
* @param ja A JSONArray.
*
* @return An XML string.
*
* @throws JSONException
*/
public static String toString(JSONArray ja) throws JSONException {
int i;
JSONObject jo;
String key;
Iterator<String> keys;
int length;
Object object;
StringBuilder sb = new StringBuilder();
String tagName;
String value;
// Emit <tagName
tagName = ja.getString(0);
XML.noSpace(tagName);
tagName = XML.escape(tagName);
sb.append('<');
sb.append(tagName);
object = ja.opt(1);
if (object instanceof JSONObject) {
i = 2;
jo = (JSONObject) object;
// Emit the attributes
keys = jo.keys();
while (keys.hasNext()) {
key = keys.next();
XML.noSpace(key);
value = jo.optString(key);
if (value != null) {
sb.append(' ');
sb.append(XML.escape(key));
sb.append('=');
sb.append('"');
sb.append(XML.escape(value));
sb.append('"');
}
}
} else {
i = 1;
}
// Emit content in body
length = ja.length();
if (i >= length) {
sb.append('/');
sb.append('>');
} else {
sb.append('>');
do {
object = ja.get(i);
i += 1;
if (object != null) {
if (object instanceof String) {
sb.append(XML.escape(object.toString()));
} else if (object instanceof JSONObject) {
sb.append(toString((JSONObject) object));
} else if (object instanceof JSONArray) {
sb.append(toString((JSONArray) object));
}
}
} while (i < length);
sb.append('<');
sb.append('/');
sb.append(tagName);
sb.append('>');
}
return sb.toString();
}
/**
* Reverse the JSONML transformation, making an XML text from a JSONObject. The JSONObject must contain a "tagName"
* property. If it has children, then it must have a "childNodes" property containing an array of objects. The other
* properties are attributes with string values.
*
* @param jo A JSONObject.
*
* @return An XML string.
*
* @throws JSONException
*/
public static String toString(JSONObject jo) throws JSONException {
StringBuilder sb = new StringBuilder();
int i;
JSONArray ja;
String key;
Iterator<String> keys;
int length;
Object object;
String tagName;
String value;
// Emit <tagName
tagName = jo.optString("tagName");
if (tagName == null) {
return XML.escape(jo.toString());
}
XML.noSpace(tagName);
tagName = XML.escape(tagName);
sb.append('<');
sb.append(tagName);
// Emit the attributes
keys = jo.keys();
while (keys.hasNext()) {
key = keys.next();
if (!"tagName".equals(key) && !"childNodes".equals(key)) {
XML.noSpace(key);
value = jo.optString(key);
if (value != null) {
sb.append(' ');
sb.append(XML.escape(key));
sb.append('=');
sb.append('"');
sb.append(XML.escape(value));
sb.append('"');
}
}
}
// Emit content in body
ja = jo.optJSONArray("childNodes");
if (ja == null) {
sb.append('/');
sb.append('>');
} else {
sb.append('>');
length = ja.length();
for (i = 0; i < length; i += 1) {
object = ja.get(i);
if (object != null) {
if (object instanceof String) {
sb.append(XML.escape(object.toString()));
} else if (object instanceof JSONObject) {
sb.append(toString((JSONObject) object));
} else if (object instanceof JSONArray) {
sb.append(toString((JSONArray) object));
} else {
sb.append(object.toString());
}
}
}
sb.append('<');
sb.append('/');
sb.append(tagName);
sb.append('>');
}
return sb.toString();
}
}