Escapes a string with the appropriated XML codes. - Java XML

Java examples for XML:XML String Escape

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Description

Escapes a string with the appropriated XML codes.

Demo Code

/*/* www  .j  a va 2 s  . c o m*/
 * $Id: c252e97234599bbc2c9094ce3ee83beaa8e24d93 $
 *
 * This file is part of the iText (R) project.
 * Copyright (c) 1998-2016 iText Group NV
 * Authors: Bruno Lowagie, Paulo Soares, Balder Van Camp, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
 * ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
 * OF THIRD PARTY RIGHTS
 *
 * 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 Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * a covered work must retain the producer line in every PDF that is created
 * or manipulated using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 */
//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        String s = "java2s.com";
        boolean onlyASCII = true;
        System.out.println(escapeXML(s, onlyASCII));
    }

    /**
     * Escapes a string with the appropriated XML codes.
     * @param s the string to be escaped
     * @param onlyASCII codes above 127 will always be escaped with &amp;#nn; if <CODE>true</CODE>
     * @return the escaped string
     * @since 5.0.6
     */
    public static String escapeXML(final String s, final boolean onlyASCII) {
        char cc[] = s.toCharArray();
        int len = cc.length;
        StringBuffer sb = new StringBuffer();
        for (int k = 0; k < len; ++k) {
            int c = cc[k];
            switch (c) {
            case '<':
                sb.append("&lt;");
                break;
            case '>':
                sb.append("&gt;");
                break;
            case '&':
                sb.append("&amp;");
                break;
            case '"':
                sb.append("&quot;");
                break;
            case '\'':
                sb.append("&apos;");
                break;
            default:
                if (isValidCharacterValue(c)) {
                    if (onlyASCII && c > 127)
                        sb.append("&#").append(c).append(';');
                    else
                        sb.append((char) c);
                }
            }
        }
        return sb.toString();
    }

    /**
     * Checks if a character value should be escaped/unescaped.
     * @param   s   the String representation of an integer
     * @return   true if it's OK to escape or unescape this value 
     */
    public static boolean isValidCharacterValue(String s) {
        try {
            int i = Integer.parseInt(s);
            return isValidCharacterValue(i);
        } catch (NumberFormatException nfe) {
            return false;
        }
    }

    /**
     * Checks if a character value should be escaped/unescaped.
     * @param   c   a character value
     * @return   true if it's OK to escape or unescape this value 
     */
    public static boolean isValidCharacterValue(int c) {
        return (c == 0x9 || c == 0xA || c == 0xD || c >= 0x20
                && c <= 0xD7FF || c >= 0xE000 && c <= 0xFFFD || c >= 0x10000
                && c <= 0x10FFFF);
    }
}

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