com.disney.groovity.util.JsonEscapingWriter Maven / Gradle / Ivy
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* © 2018 Disney | ABC Television Group
*
* Licensed under the Apache License, Version 2.0 (the "Apache License")
* with the following modification; you may not use this file except in
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* Section 6. Trademarks. is deleted and replaced with:
*
* 6. Trademarks. This License does not grant permission to use the trade
* names, trademarks, service marks, or product names of the Licensor
* and its affiliates, except as required to comply with Section 4(c) of
* the License and to reproduce the content of the NOTICE file.
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* You may obtain a copy of the Apache License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
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package com.disney.groovity.util;
import java.io.IOException;
import java.io.Writer;
import java.util.Locale;
/**
* Simple writer that performs JSON escaping without buffering
*
* @author Alex Vigdor
*
*/
public class JsonEscapingWriter extends Writer{
final private Writer out;
public JsonEscapingWriter(final Writer out) {
this.out=out;
}
@Override
public void write(final char[] buffer, final int offset, final int length) throws IOException {
int start = offset;
int p = offset;
final int bound = offset+length;
int c;
while(pstart) {
out.write(buffer, start, p-start);
}
escape(c);
start = ++p;
}
else {
p++;
}
}
if(start 0xfff) {
out.write("\\u");
}
else if (c > 0xff) {
out.write("\\u0");
}
else if (c > 0xf) {
out.write("\\u00");
}
else {
out.write("\\u000");
}
out.write(hex(c));
}
private final String hex(int codepoint) {
return Integer.toHexString(codepoint).toUpperCase(Locale.ENGLISH);
}
@Override
public void flush() throws IOException {
out.flush();
}
@Override
public void close() throws IOException {
out.close();
}
}