Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * Oracle and Java are registered trademarks of Oracle and/or its affiliates.
 * Other names may be trademarks of their respective owners.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common
 * Development and Distribution License("CDDL") (collectively, the
 * "License"). You may not use this file except in compliance with the
 * License. You can obtain a copy of the License at
 * http://www.netbeans.org/cddl-gplv2.html
 * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
 * specific language governing permissions and limitations under the
 * License.  When distributing the software, include this License Header
 * Notice in each file and include the License file at
 * nbbuild/licenses/CDDL-GPL-2-CP.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the GPL Version 2 section of the License file that
 * accompanied this code. If applicable, add the following below the
 * License Header, with the fields enclosed by brackets [] replaced by
 * your own identifying information:
 * "Portions Copyrighted [year] [name of copyright owner]"
 *
 * Contributor(s):
 *
 * The Original Software is NetBeans. The Initial Developer of the Original
 * Software is Sun Microsystems, Inc. Portions Copyright 1997-2007 Sun
 * Microsystems, Inc. All Rights Reserved.
 *
 * If you wish your version of this file to be governed by only the CDDL
 * or only the GPL Version 2, indicate your decision by adding
 * "[Contributor] elects to include this software in this distribution
 * under the [CDDL or GPL Version 2] license." If you do not indicate a
 * single choice of license, a recipient has the option to distribute
 * your version of this file under either the CDDL, the GPL Version 2 or
 * to extend the choice of license to its licensees as provided above.
 * However, if you add GPL Version 2 code and therefore, elected the GPL
 * Version 2 license, then the option applies only if the new code is
 * made subject to such option by the copyright holder.
 */

import java.io.CharConversionException;

public class Main {
    /**
     * Escape passed string as XML element content (<code>&lt;</code>,
     * <code>&amp;</code> and <code>&gt;</code> in <code>]]&gt;</code>
     * sequences).
     *
     * @param val a string to be escaped
     *
     * @return escaped value
     * @throws CharConversionException if val contains an improper XML character
     *
     * @since 1.40
     */
    public static String toElementContent(String val) throws CharConversionException {
        if (val == null) {
            throw new CharConversionException("null"); // NOI18N
        }

        if (checkContentCharacters(val)) {
            return val;
        }

        StringBuilder buf = new StringBuilder();

        for (int i = 0; i < val.length(); i++) {
            char ch = val.charAt(i);

            if ('<' == ch) {
                buf.append("&lt;");

                continue;
            } else if ('&' == ch) {
                buf.append("&amp;");

                continue;
            } else if (('>' == ch) && (i > 1) && (val.charAt(i - 2) == ']') && (val.charAt(i - 1) == ']')) {
                buf.append("&gt;");

                continue;
            }

            buf.append(ch);
        }

        return buf.toString();
    }

    /**
     * Check if all passed characters match XML expression [2].
     *
     * @return true if no escaping necessary
     * @throws CharConversionException if contains invalid chars
     */
    private static boolean checkContentCharacters(String chars) throws CharConversionException {
        boolean escape = false;

        for (int i = 0; i < chars.length(); i++) {
            char ch = chars.charAt(i);

            if (ch <= 93) { // we are UNICODE ']'

                switch (ch) {
                case 0x9:
                case 0xA:
                case 0xD:

                    continue;

                case '>': // only ]]> is dangerous

                    if (escape) {
                        continue;
                    }

                    escape = (i > 0) && (chars.charAt(i - 1) == ']');

                    continue;

                case '<':
                case '&':
                    escape = true;

                    continue;

                default:

                    if (ch < 0x20) {
                        throw new CharConversionException("Invalid XML character &#" + ((int) ch) + ";.");
                    }
                }
            }
        }

        return escape == false;
    }
}