software.amazon.smithy.model.node.internal.PrettyPrintWriter Maven / Gradle / Ivy
/*
* Copyright (c) 2013, 2016 EclipseSource.
*
* 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 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.
*/
package software.amazon.smithy.model.node.internal;
import java.io.IOException;
import java.io.Writer;
/**
* Enables human readable JSON output by inserting whitespace between values.after commas and
* colons.
*
* Based on https://github.com/ralfstx/minimal-json/blob/master/com.eclipsesource.json/src/main/java/com/eclipsesource/json/PrettyPrint.java#L84
*/
final class PrettyPrintWriter extends JsonWriter {
private final String indentString;
private int indent;
PrettyPrintWriter(Writer writer, String indentString) {
super(writer);
this.indentString = indentString;
}
@Override
void writeArrayOpen() throws IOException {
indent++;
writer.write('[');
writeNewLine();
}
@Override
void writeArrayClose() throws IOException {
indent--;
writeNewLine();
writer.write(']');
}
@Override
void writeArraySeparator() throws IOException {
writer.write(',');
if (!writeNewLine()) {
writer.write(' ');
}
}
@Override
void writeObjectOpen() throws IOException {
indent++;
writer.write('{');
writeNewLine();
}
@Override
void writeObjectClose() throws IOException {
indent--;
writeNewLine();
writer.write('}');
}
@Override
void writeMemberSeparator() throws IOException {
writer.write(':');
writer.write(' ');
}
@Override
void writeObjectSeparator() throws IOException {
writer.write(',');
if (!writeNewLine()) {
writer.write(' ');
}
}
private boolean writeNewLine() throws IOException {
if (indentString == null) {
return false;
}
writer.write(System.lineSeparator());
for (int i = 0; i < indent; i++) {
writer.write(indentString);
}
return true;
}
}