FilterCodecUtils.java

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package net.sf.gridarta.model.filter;
 
import org.jetbrains.annotations.NotNull;
 
public class FilterCodecUtils {
 
    private FilterCodecUtils() {
    }
 
    public static void encodeString(@NotNull final StringBuilder sb, @NotNull final String string) {
        for (final char ch : string.toCharArray()) {
            if (ch == '%' || ch == ',' || ch == ')' || ch == '=' || Character.isISOControl(ch)) {
                sb.append(String.format("%%%04X", (int) ch));
            } else {
                sb.append(ch);
            }
        }
    }
 
    @NotNull
    public static String decodeString(@NotNull final StringBuilder sb) {
        final StringBuilder result = new StringBuilder();
        while (sb.length() > 0) {
            final char ch = sb.charAt(0);
            if (ch == ',' || ch == ')' || ch == '=') {
                break;
            }
            if (ch == '%') {
                result.append((char) Integer.parseInt(sb.substring(1, 5), 16));
                sb.delete(0, 5);
            } else {
                result.append(ch);
                sb.delete(0, 1);
            }
        }
        return result.toString();
    }
 
}