Java String Double Quote doublequote(String str, boolean escapeHtml)

Description

doublequote

License

Apache License

Declaration

public static String doublequote(String str, boolean escapeHtml) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

public class Main {
    public static String doublequote(String str, boolean escapeHtml) {
        if (str == null) {
            return null;
        }//from  w  w w  . j  ava  2 s  .co  m

        return quote(str, escapeHtml);
    }

    public static String doublequote(Object obj, boolean escapeHtml) {
        return doublequote(obj.toString(), escapeHtml);
    }

    public static String doublequote(Object obj) {
        return doublequote(obj, true);
    }

    public static String quote(String string, boolean escapeHtml) {
        int length = string.length();
        if (string == null || length == 0) {
            return "\"\"";
        }

        if (length > 1) {
            if (quoted(string)) {
                return string;
            }
            if (parenthesized(string)) {
                return string;
            }
        }

        char c = 0;
        int i;
        int len = string.length();
        StringBuilder sb = new StringBuilder(len + 10);
        String t;

        sb.append('"');
        for (i = 0; i < len; i += 1) {
            c = string.charAt(i);
            switch (c) {
            case '\\':
            case '"':
                sb.append('\\');
                sb.append(c);
                break;
            //             case '/':
            //                 if (b == '<') {
            //                     sb.append('\\');
            //                 }
            //                 sb.append(c);
            //                 break;
            case '\b':
                sb.append("\\b");
                break;
            case '\t':
                sb.append("\\t");
                break;
            case '\n':
                sb.append("\\\\n");
                break;
            case '\f':
                sb.append("\\f");
                break;
            case '\r':
                sb.append("\\\\r");
                break;
            case ',':
                sb.append(",");
                break;
            case '<':
                if (escapeHtml) {
                    sb.append("\\u003c");
                } else {
                    sb.append(c);
                }
                break;
            case '>':
                if (escapeHtml) {
                    sb.append("\\u003e");
                } else {
                    sb.append(c);
                }
                break;
            case '=':
                if (escapeHtml) {
                    sb.append("\\u003d");
                } else {
                    sb.append(c);
                }
                break;
            case '&':
                if (escapeHtml) {
                    sb.append("\\u0026");
                } else {
                    sb.append(c);
                }
                break;
            case '\'':
                if (escapeHtml) {
                    sb.append("\\u0027");
                } else {
                    sb.append(c);
                }
                break;
            default:
                if (c < ' ') {
                    t = "000" + Integer.toHexString(c);
                    sb.append("\\u" + t.substring(t.length() - 4));
                } else {
                    sb.append(c);
                }
            }
        }
        sb.append('"');
        return sb.toString();
    }

    public static boolean quoted(String str) {
        if (str.startsWith("\"") && str.endsWith("\"")) {
            return true;
        }
        if (str.startsWith("'") && str.endsWith("'")) {
            return true;
        }

        return false;
    }

    public static boolean parenthesized(String str) {
        if (isArrayOrList(str)) {
            return true;
        }
        if (isObjectOrMap(str)) {
            return true;
        }

        return false;
    }

    public static boolean isArrayOrList(String str) {
        if (str == null) {
            return false;
        }

        if (str.startsWith("[") && str.endsWith("]")) {
            return true;
        }

        return false;
    }

    public static boolean isObjectOrMap(String str) {
        if (str == null) {
            return false;
        }
        if (str.startsWith("{") && str.endsWith("}")) {
            return true;
        }

        return false;
    }
}

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