com.sun.jersey.json.impl.writer.JsonEncoder Maven / Gradle / Ivy

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package com.sun.jersey.json.impl.writer;

import java.util.Formatter;

/**
 *
 * @author japod
 */
public class JsonEncoder {

    public static String encode(String text) {
        if ((null == text) || (text.length() == 0)) {
            return text;
        }
        Formatter formatter = new java.util.Formatter();
        StringBuffer result = new StringBuffer();
        for (int i = 0; i < text.length(); i++) {
            char c = text.charAt(i);
            switch (c) {
                case '"':
                    result.append("\\\"");
                    break;
                case '\\':
                    result.append("\\\\");
                    break;
                case '\b':
                    result.append("\\b");
                    break;
                case '\f':
                    result.append("\\f");
                    break;
                case '\n':
                    result.append("\\n");
                    break;
                case '\r':
                    result.append("\\r");
                    break;
                case '\t':
                    result.append("\\t");
                    break;
                default:
                    if (c < ' ') { // TODO: what about c > 255 ???
                        result.append(formatter.format("\\u%04X", (int)c));
                    } else {
                        result.append(c);
                    }
            }
        }
        return result.toString();
    }
}