Java PrintWriter Write saveConvert(final String text, final int escapeMode, final PrintWriter writer)

Description

Performs the necessary conversion of an java string into a property escaped string.

License

Open Source License

Parameter

Parameter	Description
text	the text to be escaped
escapeMode	the mode that should be applied.
writer	the writer that should receive the content.

Declaration

public static void saveConvert(final String text, final int escapeMode, final PrintWriter writer) 

Method Source Code

//package com.java2s;
/*!//from  ww w. j  a v  a2s  . co m
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* Copyright (c) 2002-2013 Pentaho Corporation..  All rights reserved.
*/

import java.io.PrintWriter;

public class Main {
    /**
     * A constant defining that text should be escaped in a way which is suitable for property keys.
     */
    public static final int ESCAPE_KEY = 0;
    /**
     * A constant defining that text should be escaped in a way which is suitable for property comments.
     */
    public static final int ESCAPE_COMMENT = 2;

    /**
     * Performs the necessary conversion of an java string into a property escaped string.
     *
     * @param text       the text to be escaped
     * @param escapeMode the mode that should be applied.
     * @param writer     the writer that should receive the content.
     */
    public static void saveConvert(final String text, final int escapeMode, final PrintWriter writer) {
        if (text == null) {
            return;
        }

        final char[] string = text.toCharArray();
        final char[] hexChars = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };

        for (int x = 0; x < string.length; x++) {
            final char aChar = string[x];
            switch (aChar) {
            case ' ': {
                if ((escapeMode != ESCAPE_COMMENT) && (x == 0 || escapeMode == ESCAPE_KEY)) {
                    writer.print('\\');
                }
                writer.print(' ');
                break;
            }
            case '\\': {
                writer.print('\\');
                writer.print('\\');
                break;
            }
            case '\t': {
                if (escapeMode == ESCAPE_COMMENT) {
                    writer.print(aChar);
                } else {
                    writer.print('\\');
                    writer.print('t');
                }
                break;
            }
            case '\n': {
                writer.print('\\');
                writer.print('n');
                break;
            }
            case '\r': {
                writer.print('\\');
                writer.print('r');
                break;
            }
            case '\f': {
                if (escapeMode == ESCAPE_COMMENT) {
                    writer.print(aChar);
                } else {
                    writer.print('\\');
                    writer.print('f');
                }
                break;
            }
            case '#':
            case '"':
            case '!':
            case '=':
            case ':': {
                if (escapeMode == ESCAPE_COMMENT) {
                    writer.print(aChar);
                } else {
                    writer.print('\\');
                    writer.print(aChar);
                }
                break;
            }
            default:
                if ((aChar < 0x0020) || (aChar > 0x007e)) {
                    writer.print('\\');
                    writer.print('u');
                    writer.print(hexChars[(aChar >> 12) & 0xF]);
                    writer.print(hexChars[(aChar >> 8) & 0xF]);
                    writer.print(hexChars[(aChar >> 4) & 0xF]);
                    writer.print(hexChars[aChar & 0xF]);
                } else {
                    writer.print(aChar);
                }
            }
        }
    }
}

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