org.apache.juneau.uon.UonUtils Maven / Gradle / Ivy
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// * *
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package org.apache.juneau.uon;
import static org.apache.juneau.internal.StringUtils.*;
import org.apache.juneau.internal.*;
/**
* Utility methods for the UON and UrlEncoding serializers and parsers.
*/
public final class UonUtils {
private static final AsciiSet needsQuoteChars = new AsciiSet("),=\n\t\r\b\f ");
private static final AsciiSet maybeNeedsQuotesFirstChar = new AsciiSet("),=\n\t\r\b\f tfn+-.#0123456789");
/**
* Returns true if the specified string needs to be quoted per UON notation.
*
*
* For example, strings that start with '(' or '@' or look like boolean or numeric values need to be quoted.
*
* @param s The string to test.
* @return true if the specified string needs to be quoted per UON notation.
*/
public static final boolean needsQuotes(String s) {
char c0 = s.isEmpty() ? 0 : s.charAt(0);
return (
s.isEmpty()
|| c0 == '@'
|| c0 == '('
|| needsQuoteChars.contains(s)
|| (
maybeNeedsQuotesFirstChar.contains(c0)
&& (
"true".equals(s)
|| "false".equals(s)
|| "null".equals(s)
|| isNumeric(s)
)
)
);
}
}