Example usage for org.json XMLTokener back

Introduction

In this page you can find the example usage for org.json XMLTokener back.

Prototype

public void back() 

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Usage

From source file:org.official.json.JSONML.java

/**
 * 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//from  w ww .  j av a2s . co  m
 */
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 == null) {
                        throw x.syntaxError("Misshaped tag");
                    }
                    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);
            }
        }
    }
}

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