Java String Quote quote(String string)

Description

quote

License

Apache License

Declaration

private static String quote(String string) 

Method Source Code

//package com.java2s;
/*/*from w  w w  . j a v  a2s  . c  o  m*/
 * Copyright (c) 2014. Lorem ipsum dolor sit amet, consectetur adipiscing elit.
 * http://www.apache.org/licenses/LICENSE-2.0
 */

public class Main {
    private static String quote(String string) {
        char b;
        char c = 0;
        int i;
        int len = string.length();
        StringBuffer sb = new StringBuffer(len * 2);
        String t;
        char[] chars = string.toCharArray();
        char[] buffer = new char[1030];
        int bufferIndex = 0;
        sb.append('"');
        for (i = 0; i < len; i += 1) {
            if (bufferIndex > 1024) {
                sb.append(buffer, 0, bufferIndex);
                bufferIndex = 0;
            }
            b = c;
            c = chars[i];
            switch (c) {
            case '\\':
            case '"':
                buffer[bufferIndex++] = '\\';
                buffer[bufferIndex++] = c;
                break;
            case '/':
                if (b == '<') {
                    buffer[bufferIndex++] = '\\';
                }
                buffer[bufferIndex++] = c;
                break;
            default:
                if (c < ' ') {
                    switch (c) {
                    case '\b':
                        buffer[bufferIndex++] = '\\';
                        buffer[bufferIndex++] = 'b';
                        break;
                    case '\t':
                        buffer[bufferIndex++] = '\\';
                        buffer[bufferIndex++] = 't';
                        break;
                    case '\n':
                        buffer[bufferIndex++] = '\\';
                        buffer[bufferIndex++] = 'n';
                        break;
                    case '\f':
                        buffer[bufferIndex++] = '\\';
                        buffer[bufferIndex++] = 'f';
                        break;
                    case '\r':
                        buffer[bufferIndex++] = '\\';
                        buffer[bufferIndex++] = 'r';
                        break;
                    default:
                        t = "000" + Integer.toHexString(c);
                        int tLength = t.length();
                        buffer[bufferIndex++] = '\\';
                        buffer[bufferIndex++] = 'u';
                        buffer[bufferIndex++] = t.charAt(tLength - 4);
                        buffer[bufferIndex++] = t.charAt(tLength - 3);
                        buffer[bufferIndex++] = t.charAt(tLength - 2);
                        buffer[bufferIndex++] = t.charAt(tLength - 1);
                    }
                } else {
                    buffer[bufferIndex++] = c;
                }
            }
        }
        sb.append(buffer, 0, bufferIndex);
        sb.append('"');
        return sb.toString();
    }
}

Related

1. quote(String string)
2. quote(String string)
3. quote(String string)
4. quote(String string)
5. quote(String string)
6. quote(String string)
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8. quote(String string, String charsToQuote)
9. quote(String string, StringBuilder w)