Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (C) 2016 Jared Rummler <jared.rummler@gmail.com>
 *
 * 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 {
    /**
     * Convert a string to a sequence of ASCII or XML numeric character references.
     *
     * @param s
     *     a java string (encoded in UTF-16)
     * @return a string representing a sequence of numeric character reference or
     * ASCII characters
     */
    public static String toNCRefs(String s) {
        StringBuffer sb = new StringBuffer();
        if (s != null) {
            for (int i = 0; i < s.length(); i++) {
                char c = s.charAt(i);
                if ((c >= 32) && (c < 127)) {
                    if (c == '<') {
                        sb.append("&lt;");
                    } else if (c == '>') {
                        sb.append("&gt;");
                    } else if (c == '&') {
                        sb.append("&amp;");
                    } else {
                        sb.append(c);
                    }
                } else {
                    sb.append(charToNCRef(c));
                }
            }
        }
        return sb.toString();
    }

    /**
     * Convert a single unicode scalar value to an XML numeric character
     * reference. If in the BMP, four digits are used, otherwise 6 digits are used.
     *
     * @param c
     *     a unicode scalar value
     * @return a string representing a numeric character reference
     */
    public static String charToNCRef(int c) {
        StringBuffer sb = new StringBuffer();
        for (int i = 0, nDigits = (c > 0xFFFF) ? 6 : 4; i < nDigits; i++, c >>= 4) {
            int d = c & 0xF;
            char hd;
            if (d < 10) {
                hd = (char) ((int) '0' + d);
            } else {
                hd = (char) ((int) 'A' + (d - 10));
            }
            sb.append(hd);
        }
        return "&#x" + sb.reverse() + ";";
    }
}