mirror of
https://github.com/IntellectualSites/PlotSquared.git
synced 2025-05-05 17:36:23 +02:00
407 lines
16 KiB
Java
407 lines
16 KiB
Java
package com.intellectualcrafters.json;
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import java.util.Iterator;
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/**
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* This provides static methods to convert an XML text into a JSONArray or JSONObject, and to covert a JSONArray or
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* JSONObject into an XML text using the JsonML transform.
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*
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* @author JSON.org
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* @version 2014-05-03
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*/
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public class JSONML {
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/**
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* Parse XML values and store them in a JSONArray.
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*
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* @param x The XMLTokener containing the source string.
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* @param arrayForm true if array form, false if object form.
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* @param ja The JSONArray that is containing the current tag or null if we are at the outermost level.
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*
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* @return A JSONArray if the value is the outermost tag, otherwise null.
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*
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* @throws JSONException
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*/
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private static Object parse(final XMLTokener x, final boolean arrayForm, final JSONArray ja) throws JSONException {
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String attribute;
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char c;
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String closeTag = null;
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int i;
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JSONArray newja = null;
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JSONObject newjo = null;
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Object token;
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String tagName = null;
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// Test for and skip past these forms:
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// <!-- ... -->
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// <![ ... ]]>
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// <! ... >
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// <? ... ?>
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while (true) {
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if (!x.more()) {
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throw x.syntaxError("Bad XML");
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}
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token = x.nextContent();
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if (token == XML.LT) {
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token = x.nextToken();
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if (token instanceof Character) {
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if (token == XML.SLASH) {
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// Close tag </
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token = x.nextToken();
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if (!(token instanceof String)) {
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throw new JSONException("Expected a closing name instead of '" + token + "'.");
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}
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if (x.nextToken() != XML.GT) {
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throw x.syntaxError("Misshaped close tag");
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}
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return token;
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} else if (token == XML.BANG) {
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// <!
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c = x.next();
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if (c == '-') {
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if (x.next() == '-') {
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x.skipPast("-->");
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} else {
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x.back();
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}
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} else if (c == '[') {
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token = x.nextToken();
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if (token.equals("CDATA") && (x.next() == '[')) {
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if (ja != null) {
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ja.put(x.nextCDATA());
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}
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} else {
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throw x.syntaxError("Expected 'CDATA['");
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}
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} else {
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i = 1;
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do {
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token = x.nextMeta();
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if (token == null) {
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throw x.syntaxError("Missing '>' after '<!'.");
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} else if (token == XML.LT) {
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i += 1;
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} else if (token == XML.GT) {
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i -= 1;
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}
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} while (i > 0);
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}
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} else if (token == XML.QUEST) {
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// <?
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x.skipPast("?>");
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} else {
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throw x.syntaxError("Misshaped tag");
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}
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// Open tag <
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} else {
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if (!(token instanceof String)) {
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throw x.syntaxError("Bad tagName '" + token + "'.");
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}
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tagName = (String) token;
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newja = new JSONArray();
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newjo = new JSONObject();
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if (arrayForm) {
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newja.put(tagName);
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if (ja != null) {
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ja.put(newja);
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}
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} else {
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newjo.put("tagName", tagName);
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if (ja != null) {
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ja.put(newjo);
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}
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}
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token = null;
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for (;;) {
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if (token == null) {
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token = x.nextToken();
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}
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if (token == null) {
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throw x.syntaxError("Misshaped tag");
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}
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if (!(token instanceof String)) {
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break;
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}
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// attribute = value
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attribute = (String) token;
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if (!arrayForm && ("tagName".equals(attribute) || "childNode".equals(attribute))) {
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throw x.syntaxError("Reserved attribute.");
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}
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token = x.nextToken();
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if (token == XML.EQ) {
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token = x.nextToken();
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if (!(token instanceof String)) {
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throw x.syntaxError("Missing value");
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}
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newjo.accumulate(attribute, XML.stringToValue((String) token));
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token = null;
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} else {
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newjo.accumulate(attribute, "");
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}
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}
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if (arrayForm && (newjo.length() > 0)) {
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newja.put(newjo);
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}
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// Empty tag <.../>
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if (token == XML.SLASH) {
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if (x.nextToken() != XML.GT) {
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throw x.syntaxError("Misshaped tag");
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}
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if (ja == null) {
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if (arrayForm) {
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return newja;
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} else {
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return newjo;
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}
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}
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// Content, between <...> and </...>
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} else {
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if (token != XML.GT) {
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throw x.syntaxError("Misshaped tag");
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}
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closeTag = (String) parse(x, arrayForm, newja);
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if (closeTag != null) {
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if (!closeTag.equals(tagName)) {
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throw x.syntaxError("Mismatched '" + tagName + "' and '" + closeTag + "'");
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}
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tagName = null;
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if (!arrayForm && (newja.length() > 0)) {
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newjo.put("childNodes", newja);
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}
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if (ja == null) {
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if (arrayForm) {
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return newja;
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} else {
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return newjo;
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}
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}
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}
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}
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}
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} else {
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if (ja != null) {
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ja.put(token instanceof String ? XML.stringToValue((String) token) : token);
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}
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}
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}
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}
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/**
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* Convert a well-formed (but not necessarily valid) XML string into a JSONArray using the JsonML transform. Each
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* XML tag is represented as a JSONArray in which the first element is the tag name. If the tag has attributes, then
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* the second element will be JSONObject containing the name/value pairs. If the tag contains children, then strings
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*
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* @param string The source string.
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*
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* @return A JSONArray containing the structured data from the XML string.
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*
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* @throws JSONException
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*/
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public static JSONArray toJSONArray(final String string) throws JSONException {
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return toJSONArray(new XMLTokener(string));
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}
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/**
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* Convert a well-formed (but not necessarily valid) XML string into a JSONArray using the JsonML transform. Each
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* XML tag is represented as a JSONArray in which the first element is the tag name. If the tag has attributes, then
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* the second element will be JSONObject containing the name/value pairs. If the tag contains children, then strings
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* and JSONArrays will represent the child content and tags. Comments, prologs, DTDs, and <code><[ [ ]]></code>
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* are ignored.
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*
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* @param x An XMLTokener.
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*
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* @return A JSONArray containing the structured data from the XML string.
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*
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* @throws JSONException
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*/
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public static JSONArray toJSONArray(final XMLTokener x) throws JSONException {
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return (JSONArray) parse(x, true, null);
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}
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/**
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* Convert a well-formed (but not necessarily valid) XML string into a JSONObject using the JsonML transform. Each
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* XML tag is represented as a JSONObject with a "tagName" property. If the tag has attributes, then the attributes
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* will be in the JSONObject as properties. If the tag contains children, the object will have a "childNodes"
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* property which will be an array of strings and JsonML JSONObjects.
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*
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* Comments, prologs, DTDs, and <code><[ [ ]]></code> are ignored.
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*
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* @param x An XMLTokener of the XML source text.
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*
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* @return A JSONObject containing the structured data from the XML string.
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*
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* @throws JSONException
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*/
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public static JSONObject toJSONObject(final XMLTokener x) throws JSONException {
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return (JSONObject) parse(x, false, null);
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}
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/**
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* Convert a well-formed (but not necessarily valid) XML string into a JSONObject using the JsonML transform. Each
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* XML tag is represented as a JSONObject with a "tagName" property. If the tag has attributes, then the attributes
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* will be in the JSONObject as properties. If the tag contains children, the object will have a "childNodes"
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* property which will be an array of strings and JsonML JSONObjects.
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*
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* Comments, prologs, DTDs, and <code><[ [ ]]></code> are ignored.
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*
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* @param string The XML source text.
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*
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* @return A JSONObject containing the structured data from the XML string.
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*
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* @throws JSONException
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*/
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public static JSONObject toJSONObject(final String string) throws JSONException {
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return toJSONObject(new XMLTokener(string));
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}
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/**
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* Reverse the JSONML transformation, making an XML text from a JSONArray.
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*
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* @param ja A JSONArray.
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*
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* @return An XML string.
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*
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* @throws JSONException
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*/
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public static String toString(final JSONArray ja) throws JSONException {
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int i;
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JSONObject jo;
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String key;
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Iterator<String> keys;
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int length;
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Object object;
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final StringBuilder sb = new StringBuilder();
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String tagName;
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String value;
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// Emit <tagName
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tagName = ja.getString(0);
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XML.noSpace(tagName);
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tagName = XML.escape(tagName);
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sb.append('<');
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sb.append(tagName);
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object = ja.opt(1);
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if (object instanceof JSONObject) {
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i = 2;
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jo = (JSONObject) object;
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// Emit the attributes
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keys = jo.keys();
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while (keys.hasNext()) {
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key = keys.next();
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XML.noSpace(key);
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value = jo.optString(key);
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if (value != null) {
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sb.append(' ');
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sb.append(XML.escape(key));
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sb.append('=');
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sb.append('"');
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sb.append(XML.escape(value));
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sb.append('"');
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}
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}
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} else {
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i = 1;
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}
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// Emit content in body
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length = ja.length();
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if (i >= length) {
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sb.append('/');
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sb.append('>');
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} else {
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sb.append('>');
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do {
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object = ja.get(i);
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i += 1;
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if (object != null) {
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if (object instanceof String) {
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sb.append(XML.escape(object.toString()));
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} else if (object instanceof JSONObject) {
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sb.append(toString((JSONObject) object));
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} else if (object instanceof JSONArray) {
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sb.append(toString((JSONArray) object));
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}
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}
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} while (i < length);
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sb.append('<');
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sb.append('/');
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sb.append(tagName);
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sb.append('>');
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}
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return sb.toString();
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}
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/**
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* Reverse the JSONML transformation, making an XML text from a JSONObject. The JSONObject must contain a "tagName"
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* property. If it has children, then it must have a "childNodes" property containing an array of objects. The other
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* properties are attributes with string values.
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*
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* @param jo A JSONObject.
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*
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* @return An XML string.
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*
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* @throws JSONException
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*/
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public static String toString(final JSONObject jo) throws JSONException {
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final StringBuilder sb = new StringBuilder();
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int i;
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JSONArray ja;
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String key;
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Iterator<String> keys;
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int length;
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Object object;
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String tagName;
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String value;
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// Emit <tagName
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tagName = jo.optString("tagName");
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if (tagName == null) {
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return XML.escape(jo.toString());
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}
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XML.noSpace(tagName);
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tagName = XML.escape(tagName);
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sb.append('<');
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sb.append(tagName);
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// Emit the attributes
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keys = jo.keys();
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while (keys.hasNext()) {
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key = keys.next();
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if (!"tagName".equals(key) && !"childNodes".equals(key)) {
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XML.noSpace(key);
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value = jo.optString(key);
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if (value != null) {
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sb.append(' ');
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sb.append(XML.escape(key));
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sb.append('=');
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sb.append('"');
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sb.append(XML.escape(value));
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sb.append('"');
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}
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}
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}
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// Emit content in body
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ja = jo.optJSONArray("childNodes");
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if (ja == null) {
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sb.append('/');
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sb.append('>');
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} else {
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sb.append('>');
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length = ja.length();
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for (i = 0; i < length; i += 1) {
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object = ja.get(i);
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if (object != null) {
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if (object instanceof String) {
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sb.append(XML.escape(object.toString()));
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} else if (object instanceof JSONObject) {
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sb.append(toString((JSONObject) object));
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} else if (object instanceof JSONArray) {
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sb.append(toString((JSONArray) object));
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} else {
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sb.append(object.toString());
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}
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}
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}
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sb.append('<');
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sb.append('/');
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sb.append(tagName);
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sb.append('>');
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}
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return sb.toString();
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}
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}
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