net.sourceforge.plantuml.json.PrettyPrint Maven / Gradle / Ivy
// 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:
*
* https://plantuml.com/patreon (only 1$ per month!)
* https://plantuml.com/liberapay (only 1€ per month!)
* https://plantuml.com/paypal
*
*
* 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
*
* 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;
import java.util.Arrays;
/**
* Enables human readable JSON output by inserting whitespace between
* values.after commas and colons. Example:
*
*
* jsonValue.writeTo(writer, PrettyPrint.singleLine());
*
*/
public class PrettyPrint extends WriterConfig {
private final char[] indentChars;
protected PrettyPrint(char[] indentChars) {
this.indentChars = indentChars;
}
/**
* Print every value on a separate line. Use tabs (\t) for
* indentation.
*
* @return A PrettyPrint instance for wrapped mode with tab indentation
*/
public static PrettyPrint singleLine() {
return new PrettyPrint(null);
}
/**
* Print every value on a separate line. Use the given number of spaces for
* indentation.
*
* @param number the number of spaces to use
* @return A PrettyPrint instance for wrapped mode with spaces indentation
*/
public static PrettyPrint indentWithSpaces(int number) {
if (number < 0) {
throw new IllegalArgumentException("number is negative");
}
char[] chars = new char[number];
Arrays.fill(chars, ' ');
return new PrettyPrint(chars);
}
/**
* Do not break lines, but still insert whitespace between values.
*
* @return A PrettyPrint instance for single-line mode
*/
public static PrettyPrint indentWithTabs() {
return new PrettyPrint(new char[] { '\t' });
}
@Override
protected JsonWriter createWriter(Writer writer) {
return new PrettyPrintWriter(writer, indentChars);
}
private static class PrettyPrintWriter extends JsonWriter {
private final char[] indentChars;
private int indent;
private PrettyPrintWriter(Writer writer, char[] indentChars) {
super(writer);
this.indentChars = indentChars;
}
@Override
protected void writeArrayOpen() throws IOException {
indent++;
writer.write('[');
writeNewLine();
}
@Override
protected void writeArrayClose() throws IOException {
indent--;
writeNewLine();
writer.write(']');
}
@Override
protected void writeArraySeparator() throws IOException {
writer.write(',');
if (!writeNewLine()) {
writer.write(' ');
}
}
@Override
protected void writeObjectOpen() throws IOException {
indent++;
writer.write('{');
writeNewLine();
}
@Override
protected void writeObjectClose() throws IOException {
indent--;
writeNewLine();
writer.write('}');
}
@Override
protected void writeMemberSeparator() throws IOException {
writer.write(':');
writer.write(' ');
}
@Override
protected void writeObjectSeparator() throws IOException {
writer.write(',');
if (!writeNewLine()) {
writer.write(' ');
}
}
private boolean writeNewLine() throws IOException {
if (indentChars == null) {
return false;
}
writer.write('\n');
for (int i = 0; i < indent; i++) {
writer.write(indentChars);
}
return true;
}
}
}