Main.java Source code

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Here is the source code for Main.java

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//package com.java2s;
/**
 * $RCSfile: StringUtils.java,v $
 * $Revision: 1.1.2.1 $
 * $Date: 2014/02/20 01:11:36 $
 *
 * Copyright 2003-2007 Jive Software.
 *
 * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

public class Main {
    /**
     * Escapes the node portion of a JID according to "JID Escaping" (JEP-0106).
     * Escaping replaces characters prohibited by node-prep with escape sequences,
     * as follows:<p>
     *
     * <table border="1">
     * <tr><td><b>Unescaped Character</b></td><td><b>Encoded Sequence</b></td></tr>
     * <tr><td>&lt;space&gt;</td><td>\20</td></tr>
     * <tr><td>"</td><td>\22</td></tr>
     * <tr><td>&</td><td>\26</td></tr>
     * <tr><td>'</td><td>\27</td></tr>
     * <tr><td>/</td><td>\2f</td></tr>
     * <tr><td>:</td><td>\3a</td></tr>
     * <tr><td>&lt;</td><td>\3c</td></tr>
     * <tr><td>&gt;</td><td>\3e</td></tr>
     * <tr><td>@</td><td>\40</td></tr>
     * <tr><td>\</td><td>\5c</td></tr>
     * </table><p>
     *
     * This process is useful when the node comes from an external source that doesn't
     * conform to nodeprep. For example, a username in LDAP may be "Joe Smith". Because
     * the &lt;space&gt; character isn't a valid part of a node, the username should
     * be escaped to "Joe\20Smith" before being made into a JID (e.g. "joe\20smith@example.com"
     * after case-folding, etc. has been applied).<p>
     *
     * All node escaping and un-escaping must be performed manually at the appropriate
     * time; the JID class will not escape or un-escape automatically.
     *
     * @param node the node.
     * @return the escaped version of the node.
     */
    public static String escapeNode(String node) {
        if (node == null) {
            return null;
        }
        StringBuilder buf = new StringBuilder(node.length() + 8);
        for (int i = 0, n = node.length(); i < n; i++) {
            char c = node.charAt(i);
            switch (c) {
            case '"':
                buf.append("\\22");
                break;
            case '&':
                buf.append("\\26");
                break;
            case '\'':
                buf.append("\\27");
                break;
            case '/':
                buf.append("\\2f");
                break;
            case ':':
                buf.append("\\3a");
                break;
            case '<':
                buf.append("\\3c");
                break;
            case '>':
                buf.append("\\3e");
                break;
            case '@':
                buf.append("\\40");
                break;
            case '\\':
                buf.append("\\5c");
                break;
            default: {
                if (Character.isWhitespace(c)) {
                    buf.append("\\20");
                } else {
                    buf.append(c);
                }
            }
            }
        }
        return buf.toString();
    }
}