filter output String to have only valid XML unicode characters as specified by the XML 1.0 standard. - Android java.lang

Android examples for java.lang:String Unicode

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Description

filter output String to have only valid XML unicode characters as specified by the XML 1.0 standard.

Demo Code

import android.text.Html;
import android.text.TextUtils;
import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class Main{

    /**/*from www . j  a  v  a 2 s  . c  om*/
     * This method ensures that the output String has only
     * valid XML unicode characters as specified by the
     * XML 1.0 standard. For reference, please see
     * <a href="http://www.w3.org/TR/2000/REC-xml-20001006#NT-Char">the
     * standard</a>. This method will return an empty
     * String if the input is null or empty.
     *
     * @param in The String whose non-valid characters we want to remove.
     * @return The in String, stripped of non-valid characters.
     */
    public static final String stripNonValidXMLCharacters(String in) {
        StringBuilder out = new StringBuilder(); // Used to hold the output.
        char current; // Used to reference the current character.

        if (in == null || ("".equals(in))) {
            return ""; // vacancy test.
        }
        for (int i = 0; i < in.length(); i++) {
            current = in.charAt(i); // NOTE: No IndexOutOfBoundsException caught here; it should not happen.
            if ((current == 0x9) || (current == 0xA) || (current == 0xD)
                    || ((current >= 0x20) && (current <= 0xD7FF))
                    || ((current >= 0xE000) && (current <= 0xFFFD))
                    || ((current >= 0x10000) && (current <= 0x10FFFF))) {
                out.append(current);
            }
        }
        return out.toString();
    }

}

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