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- package org.json;
- /*
- Copyright (c) 2002 JSON.org
- Permission is hereby granted, free of charge, to any person obtaining a copy
- of this software and associated documentation files (the "Software"), to deal
- in the Software without restriction, including without limitation the rights
- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- copies of the Software, and to permit persons to whom the Software is
- furnished to do so, subject to the following conditions:
- The above copyright notice and this permission notice shall be included in all
- copies or substantial portions of the Software.
- The Software shall be used for Good, not Evil.
- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- SOFTWARE.
- */
- import java.util.Iterator;
- /**
- * This provides static methods to convert an XML text into a JSONObject,
- * and to covert a JSONObject into an XML text.
- * @author JSON.org
- * @version 2014-05-03
- */
- public class XML {
- /** The Character '&'. */
- public static final Character AMP = '&';
- /** The Character '''. */
- public static final Character APOS = '\'';
- /** The Character '!'. */
- public static final Character BANG = '!';
- /** The Character '='. */
- public static final Character EQ = '=';
- /** The Character '>'. */
- public static final Character GT = '>';
- /** The Character '<'. */
- public static final Character LT = '<';
- /** The Character '?'. */
- public static final Character QUEST = '?';
- /** The Character '"'. */
- public static final Character QUOT = '"';
- /** The Character '/'. */
- public static final Character SLASH = '/';
- /**
- * Replace special characters with XML escapes:
- * <pre>
- * & <small>(ampersand)</small> is replaced by &amp;
- * < <small>(less than)</small> is replaced by &lt;
- * > <small>(greater than)</small> is replaced by &gt;
- * " <small>(double quote)</small> is replaced by &quot;
- * </pre>
- * @param string The string to be escaped.
- * @return The escaped string.
- */
- public static String escape(String string) {
- StringBuilder sb = new StringBuilder(string.length());
- for (int i = 0, length = string.length(); i < length; i++) {
- char c = string.charAt(i);
- switch (c) {
- case '&':
- sb.append("&");
- break;
- case '<':
- sb.append("<");
- break;
- case '>':
- sb.append(">");
- break;
- case '"':
- sb.append(""");
- break;
- case '\'':
- sb.append("'");
- break;
- default:
- sb.append(c);
- }
- }
- return sb.toString();
- }
- /**
- * Throw an exception if the string contains whitespace.
- * Whitespace is not allowed in tagNames and attributes.
- * @param string A string.
- * @throws JSONException
- */
- public static void noSpace(String string) throws JSONException {
- int i, length = string.length();
- if (length == 0) {
- throw new JSONException("Empty string.");
- }
- for (i = 0; i < length; i += 1) {
- if (Character.isWhitespace(string.charAt(i))) {
- throw new JSONException("'" + string +
- "' contains a space character.");
- }
- }
- }
- /**
- * Scan the content following the named tag, attaching it to the context.
- * @param x The XMLTokener containing the source string.
- * @param context The JSONObject that will include the new material.
- * @param name The tag name.
- * @return true if the close tag is processed.
- * @throws JSONException
- */
- private static boolean parse(XMLTokener x, JSONObject context,
- String name) throws JSONException {
- char c;
- int i;
- JSONObject jsonobject = null;
- String string;
- String tagName;
- Object token;
- // Test for and skip past these forms:
- // <!-- ... -->
- // <! ... >
- // <![ ... ]]>
- // <? ... ?>
- // Report errors for these forms:
- // <>
- // <=
- // <<
- token = x.nextToken();
- // <!
- if (token == BANG) {
- c = x.next();
- if (c == '-') {
- if (x.next() == '-') {
- x.skipPast("-->");
- return false;
- }
- x.back();
- } else if (c == '[') {
- token = x.nextToken();
- if ("CDATA".equals(token)) {
- if (x.next() == '[') {
- string = x.nextCDATA();
- if (string.length() > 0) {
- context.accumulate("content", string);
- }
- return false;
- }
- }
- throw x.syntaxError("Expected 'CDATA['");
- }
- i = 1;
- do {
- token = x.nextMeta();
- if (token == null) {
- throw x.syntaxError("Missing '>' after '<!'.");
- } else if (token == LT) {
- i += 1;
- } else if (token == GT) {
- i -= 1;
- }
- } while (i > 0);
- return false;
- } else if (token == QUEST) {
- // <?
- x.skipPast("?>");
- return false;
- } else if (token == SLASH) {
- // Close tag </
- token = x.nextToken();
- if (name == null) {
- throw x.syntaxError("Mismatched close tag " + token);
- }
- if (!token.equals(name)) {
- throw x.syntaxError("Mismatched " + name + " and " + token);
- }
- if (x.nextToken() != GT) {
- throw x.syntaxError("Misshaped close tag");
- }
- return true;
- } else if (token instanceof Character) {
- throw x.syntaxError("Misshaped tag");
- // Open tag <
- } else {
- tagName = (String)token;
- token = null;
- jsonobject = new JSONObject();
- for (;;) {
- if (token == null) {
- token = x.nextToken();
- }
- // attribute = value
- if (token instanceof String) {
- string = (String)token;
- token = x.nextToken();
- if (token == EQ) {
- token = x.nextToken();
- if (!(token instanceof String)) {
- throw x.syntaxError("Missing value");
- }
- jsonobject.accumulate(string,
- XML.stringToValue((String)token));
- token = null;
- } else {
- jsonobject.accumulate(string, "");
- }
- // Empty tag <.../>
- } else if (token == SLASH) {
- if (x.nextToken() != GT) {
- throw x.syntaxError("Misshaped tag");
- }
- if (jsonobject.length() > 0) {
- context.accumulate(tagName, jsonobject);
- } else {
- context.accumulate(tagName, "");
- }
- return false;
- // Content, between <...> and </...>
- } else if (token == GT) {
- for (;;) {
- token = x.nextContent();
- if (token == null) {
- if (tagName != null) {
- throw x.syntaxError("Unclosed tag " + tagName);
- }
- return false;
- } else if (token instanceof String) {
- string = (String)token;
- if (string.length() > 0) {
- jsonobject.accumulate("content",
- XML.stringToValue(string));
- }
- // Nested element
- } else if (token == LT) {
- if (parse(x, jsonobject, tagName)) {
- // Modification by ToYonos, could be improved off course
- if (jsonobject.length() == 0)
- {
- if (context.opt("CHILDREN") == null) context.put("CHILDREN", new JSONArray());
- ((JSONArray) context.get("CHILDREN")).put(new JSONObject().accumulate(tagName, ""));
- }
- else if (jsonobject.length() == 1 && jsonobject.opt("content") != null)
- {
- if (context.opt("CHILDREN") == null) context.put("CHILDREN", new JSONArray());
- ((JSONArray) context.get("CHILDREN")).put(new JSONObject().accumulate(tagName ,jsonobject.opt("content")));
- }
- else // End of modification
- {
- context.accumulate(tagName, jsonobject);
- }
- return false;
- }
- }
- }
- } else {
- throw x.syntaxError("Misshaped tag");
- }
- }
- }
- }
- /**
- * Try to convert a string into a number, boolean, or null. If the string
- * can't be converted, return the string. This is much less ambitious than
- * JSONObject.stringToValue, especially because it does not attempt to
- * convert plus forms, octal forms, hex forms, or E forms lacking decimal
- * points.
- * @param string A String.
- * @return A simple JSON value.
- */
- public static Object stringToValue(String string) {
- if ("true".equalsIgnoreCase(string)) {
- return Boolean.TRUE;
- }
- if ("false".equalsIgnoreCase(string)) {
- return Boolean.FALSE;
- }
- if ("null".equalsIgnoreCase(string)) {
- return JSONObject.NULL;
- }
- // If it might be a number, try converting it, first as a Long, and then as a
- // Double. If that doesn't work, return the string.
- try {
- char initial = string.charAt(0);
- if (initial == '-' || (initial >= '0' && initial <= '9')) {
- Long value = new Long(string);
- if (value.toString().equals(string)) {
- return value;
- }
- }
- } catch (Exception ignore) {
- try {
- Double value = new Double(string);
- if (value.toString().equals(string)) {
- return value;
- }
- } catch (Exception ignoreAlso) {
- }
- }
- return string;
- }
- /**
- * Convert a well-formed (but not necessarily valid) XML string into a
- * JSONObject. Some information may be lost in this transformation
- * because JSON is a data format and XML is a document format. XML uses
- * elements, attributes, and content text, while JSON uses unordered
- * collections of name/value pairs and arrays of values. JSON does not
- * does not like to distinguish between elements and attributes.
- * Sequences of similar elements are represented as JSONArrays. Content
- * text may be placed in a "content" member. Comments, prologs, DTDs, and
- * <code><[ [ ]]></code> are ignored.
- * @param string The source string.
- * @return A JSONObject containing the structured data from the XML string.
- * @throws JSONException
- */
- public static JSONObject toJSONObject(String string) throws JSONException {
- JSONObject jo = new JSONObject();
- XMLTokener x = new XMLTokener(string);
- while (x.more() && x.skipPast("<")) {
- parse(x, jo, null);
- }
- return jo;
- }
- /**
- * Convert a JSONObject into a well-formed, element-normal XML string.
- * @param object A JSONObject.
- * @return A string.
- * @throws JSONException
- */
- public static String toString(Object object) throws JSONException {
- return toString(object, null);
- }
- /**
- * Convert a JSONObject into a well-formed, element-normal XML string.
- * @param object A JSONObject.
- * @param tagName The optional name of the enclosing tag.
- * @return A string.
- * @throws JSONException
- */
- public static String toString(Object object, String tagName)
- throws JSONException {
- StringBuilder sb = new StringBuilder();
- int i;
- JSONArray ja;
- JSONObject jo;
- String key;
- Iterator<String> keys;
- int length;
- String string;
- Object value;
- if (object instanceof JSONObject) {
- // Emit <tagName>
- if (tagName != null) {
- sb.append('<');
- sb.append(tagName);
- sb.append('>');
- }
- // Loop thru the keys.
- jo = (JSONObject)object;
- keys = jo.keys();
- while (keys.hasNext()) {
- key = keys.next();
- value = jo.opt(key);
- if (value == null) {
- value = "";
- }
- string = value instanceof String ? (String)value : null;
- // Emit content in body
- if ("content".equals(key)) {
- if (value instanceof JSONArray) {
- ja = (JSONArray)value;
- length = ja.length();
- for (i = 0; i < length; i += 1) {
- if (i > 0) {
- sb.append('\n');
- }
- sb.append(escape(ja.get(i).toString()));
- }
- } else {
- sb.append(escape(value.toString()));
- }
- // Emit an array of similar keys
- } else if (value instanceof JSONArray) {
- ja = (JSONArray)value;
- length = ja.length();
- for (i = 0; i < length; i += 1) {
- value = ja.get(i);
- if (value instanceof JSONArray) {
- sb.append('<');
- sb.append(key);
- sb.append('>');
- sb.append(toString(value));
- sb.append("</");
- sb.append(key);
- sb.append('>');
- } else {
- sb.append(toString(value, key));
- }
- }
- } else if ("".equals(value)) {
- sb.append('<');
- sb.append(key);
- sb.append("/>");
- // Emit a new tag <k>
- } else {
- sb.append(toString(value, key));
- }
- }
- if (tagName != null) {
- // Emit the </tagname> close tag
- sb.append("</");
- sb.append(tagName);
- sb.append('>');
- }
- return sb.toString();
- // XML does not have good support for arrays. If an array appears in a place
- // where XML is lacking, synthesize an <array> element.
- } else {
- if (object.getClass().isArray()) {
- object = new JSONArray(object);
- }
- if (object instanceof JSONArray) {
- ja = (JSONArray)object;
- length = ja.length();
- for (i = 0; i < length; i += 1) {
- sb.append(toString(ja.opt(i), tagName == null ? "array" : tagName));
- }
- return sb.toString();
- } else {
- string = (object == null) ? "null" : escape(object.toString());
- return (tagName == null) ? "\"" + string + "\"" :
- (string.length() == 0) ? "<" + tagName + "/>" :
- "<" + tagName + ">" + string + "</" + tagName + ">";
- }
- }
- }
- }
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