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PlantUML is a component that allows to quickly write diagrams from text.
// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
/* +=======================================================================
* |
* | PlantUML : a free UML diagram generator
* |
* +=======================================================================
*
* (C) Copyright 2009-2024, Arnaud Roques
*
* Project Info: https://plantuml.com
*
* If you like this project or if you find it useful, you can support us at:
*
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*
* PlantUML is free software; you can redistribute it and/or modify it
* under the terms of the Eclipse Public License.
*
* THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC
* LICENSE ("AGREEMENT"). [Eclipse Public License - v 1.0]
*
* ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUTES
* RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.
*
* You may obtain a copy of the License at
*
* http://www.eclipse.org/legal/epl-v10.html
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* 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.
*
* PlantUML can occasionally display sponsored or advertising messages. Those
* messages are usually generated on welcome or error images and never on
* functional diagrams.
* See https://plantuml.com/professional if you want to remove them
*
* Images (whatever their format : PNG, SVG, EPS...) generated by running PlantUML
* are owned by the author of their corresponding sources code (that is, their
* textual description in PlantUML language). Those images are not covered by
* this EPL license.
*
* The generated images can then be used without any reference to the EPL license.
* It is not even necessary to stipulate that they have been generated with PlantUML,
* although this will be appreciated by the PlantUML team.
*
* There is an exception : if the textual description in PlantUML language is also covered
* by any license, then the generated images are logically covered
* by the very same license.
*
* This is the IGY distribution (Install GraphViz by Yourself).
* You have to install GraphViz and to setup the GRAPHVIZ_DOT environment variable
* (see https://plantuml.com/graphviz-dot )
*
* Icons provided by OpenIconic : https://useiconic.com/open
* Archimate sprites provided by Archi : http://www.archimatetool.com
* Stdlib AWS provided by https://github.com/milo-minderbinder/AWS-PlantUML
* Stdlib Icons provided https://github.com/tupadr3/plantuml-icon-font-sprites
* ASCIIMathML (c) Peter Jipsen http://www.chapman.edu/~jipsen
* ASCIIMathML (c) David Lippman http://www.pierce.ctc.edu/dlippman
* CafeUndZopfli ported by Eugene Klyuchnikov https://github.com/eustas/CafeUndZopfli
* Brotli (c) by the Brotli Authors https://github.com/google/brotli
* Themes (c) by Brett Schwarz https://github.com/bschwarz/puml-themes
* Twemoji (c) by Twitter at https://twemoji.twitter.com/
*
*/
package net.sourceforge.plantuml.json;
import java.io.IOException;
import java.io.Writer;
class JsonWriter {
private static final int CONTROL_CHARACTERS_END = 0x001f;
private static final char[] QUOT_CHARS = { '\\', '"' };
private static final char[] BS_CHARS = { '\\', '\\' };
private static final char[] LF_CHARS = { '\\', 'n' };
private static final char[] CR_CHARS = { '\\', 'r' };
private static final char[] TAB_CHARS = { '\\', 't' };
// In JavaScript, U+2028 and U+2029 characters count as line endings and must be
// encoded.
// http://stackoverflow.com/questions/2965293/javascript-parse-error-on-u2028-unicode-character
private static final char[] UNICODE_2028_CHARS = { '\\', 'u', '2', '0', '2', '8' };
private static final char[] UNICODE_2029_CHARS = { '\\', 'u', '2', '0', '2', '9' };
private static final char[] HEX_DIGITS = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd',
'e', 'f' };
protected final Writer writer;
JsonWriter(Writer writer) {
this.writer = writer;
}
protected void writeLiteral(String value) throws IOException {
writer.write(value);
}
protected void writeNumber(String string) throws IOException {
writer.write(string);
}
protected void writeString(String string) throws IOException {
writer.write('"');
writeJsonString(string);
writer.write('"');
}
protected void writeArrayOpen() throws IOException {
writer.write('[');
}
protected void writeArrayClose() throws IOException {
writer.write(']');
}
protected void writeArraySeparator() throws IOException {
writer.write(',');
}
protected void writeObjectOpen() throws IOException {
writer.write('{');
}
protected void writeObjectClose() throws IOException {
writer.write('}');
}
protected void writeMemberName(String name) throws IOException {
writer.write('"');
writeJsonString(name);
writer.write('"');
}
protected void writeMemberSeparator() throws IOException {
writer.write(':');
}
protected void writeObjectSeparator() throws IOException {
writer.write(',');
}
protected void writeJsonString(String string) throws IOException {
int length = string.length();
int start = 0;
for (int index = 0; index < length; index++) {
char[] replacement = getReplacementChars(string.charAt(index));
if (replacement != null) {
writer.write(string, start, index - start);
writer.write(replacement);
start = index + 1;
}
}
writer.write(string, start, length - start);
}
private static char[] getReplacementChars(char ch) {
if (ch > '\\') {
if (ch < '\u2028' || ch > '\u2029') {
// The lower range contains 'a' .. 'z'. Only 2 checks required.
return null;
}
return ch == '\u2028' ? UNICODE_2028_CHARS : UNICODE_2029_CHARS;
}
if (ch == '\\') {
return BS_CHARS;
}
if (ch > '"') {
// This range contains '0' .. '9' and 'A' .. 'Z'. Need 3 checks to get here.
return null;
}
if (ch == '"') {
return QUOT_CHARS;
}
if (ch > CONTROL_CHARACTERS_END) {
return null;
}
if (ch == '\n') {
return LF_CHARS;
}
if (ch == '\r') {
return CR_CHARS;
}
if (ch == '\t') {
return TAB_CHARS;
}
return new char[] { '\\', 'u', '0', '0', HEX_DIGITS[ch >> 4 & 0x000f], HEX_DIGITS[ch & 0x000f] };
}
}