FileDocCategorySizeDatePackage
XString.javaAPI DocJava SE 5 API37623Fri Aug 26 14:56:10 BST 2005com.sun.org.apache.xpath.internal.objects

XString

public class XString extends XObject implements XMLString
This class represents an XPath string object, and is capable of converting the string to other types, such as a number.
xsl.usage
general

Fields Summary
public static XString
EMPTYSTRING
Empty string XString object
Constructors Summary
protected XString(Object val)
Construct a XString object. This constructor exists for derived classes.

param
val String object this will wrap.


                       
    
  
    super(val);
  
public XString(String val)
Construct a XNodeSet object.

param
val String object this will wrap.

    super(val);
  
Methods Summary
public booleanbool()
Cast result object to a boolean.

return
True if the length of this string object is greater than 0.

    return str().length() > 0;
  
public voidcallVisitors(com.sun.org.apache.xpath.internal.ExpressionOwner owner, com.sun.org.apache.xpath.internal.XPathVisitor visitor)

see
XPathVisitable#callVisitors(ExpressionOwner, XPathVisitor)

  	visitor.visitStringLiteral(owner, this);
  
public charcharAt(int index)
Returns the character at the specified index. An index ranges from 0 to length() - 1. The first character of the sequence is at index 0, the next at index 1, and so on, as for array indexing.

param
index the index of the character.
return
the character at the specified index of this string. The first character is at index 0.
exception
IndexOutOfBoundsException if the index argument is negative or not less than the length of this string.

    return str().charAt(index);
  
public intcompareTo(com.sun.org.apache.xml.internal.utils.XMLString xstr)
Compares two strings lexicographically.

param
anotherString the String to be compared. NEEDSDOC @param xstr
return
the value 0 if the argument string is equal to this string; a value less than 0 if this string is lexicographically less than the string argument; and a value greater than 0 if this string is lexicographically greater than the string argument.
exception
java.lang.NullPointerException if anotherString is null.


    int len1 = this.length();
    int len2 = xstr.length();
    int n = Math.min(len1, len2);
    int i = 0;
    int j = 0;

    while (n-- != 0)
    {
      char c1 = this.charAt(i);
      char c2 = xstr.charAt(j);

      if (c1 != c2)
      {
        return c1 - c2;
      }

      i++;
      j++;
    }

    return len1 - len2;
  
public intcompareToIgnoreCase(com.sun.org.apache.xml.internal.utils.XMLString str)
Compares two strings lexicographically, ignoring case considerations. This method returns an integer whose sign is that of this.toUpperCase().toLowerCase().compareTo( str.toUpperCase().toLowerCase()).

Note that this method does not take locale into account, and will result in an unsatisfactory ordering for certain locales. The java.text package provides collators to allow locale-sensitive ordering.

param
str the String to be compared.
return
a negative integer, zero, or a positive integer as the the specified String is greater than, equal to, or less than this String, ignoring case considerations.
see
java.text.Collator#compare(String, String)
since
1.2

    // %REVIEW%  Like it says, @since 1.2. Doesn't exist in earlier
    // versions of Java, hence we can't yet shell out to it. We can implement
    // it as character-by-character compare, but doing so efficiently
    // is likely to be (ahem) interesting.
    //  
    // However, since nobody is actually _using_ this method yet:
    //    return str().compareToIgnoreCase(str.toString());
    
    throw new com.sun.org.apache.xml.internal.utils.WrappedRuntimeException(
      new java.lang.NoSuchMethodException(
        "Java 1.2 method, not yet implemented"));
  
public com.sun.org.apache.xml.internal.utils.XMLStringconcat(java.lang.String str)
Concatenates the specified string to the end of this string.

param
str the String that is concatenated to the end of this String.
return
a string that represents the concatenation of this object's characters followed by the string argument's characters.
exception
java.lang.NullPointerException if str is null.


    // %REVIEW% Make an FSB here?
    return new XString(str().concat(str));
  
public voiddispatchAsComment(org.xml.sax.ext.LexicalHandler lh)
Directly call the comment method on the passed LexicalHandler for the string-value.

param
lh A non-null reference to a LexicalHandler.
throws
org.xml.sax.SAXException


    String str = str();

    lh.comment(str.toCharArray(), 0, str.length());
  
public voiddispatchCharactersEvents(org.xml.sax.ContentHandler ch)
Directly call the characters method on the passed ContentHandler for the string-value. Multiple calls to the ContentHandler's characters methods may well occur for a single call to this method.

param
ch A non-null reference to a ContentHandler.
throws
org.xml.sax.SAXException


    String str = str();

    ch.characters(str.toCharArray(), 0, str.length());
  
public booleanendsWith(java.lang.String suffix)
Tests if this string ends with the specified suffix.

param
suffix the suffix.
return
true if the character sequence represented by the argument is a suffix of the character sequence represented by this object; false otherwise. Note that the result will be true if the argument is the empty string or is equal to this String object as determined by the {@link #equals(Object)} method.
exception
java.lang.NullPointerException if suffix is null.

    return str().endsWith(suffix);
  
public booleanequals(com.sun.org.apache.xpath.internal.objects.XObject obj2)
Tell if two objects are functionally equal.

param
obj2 Object to compare this to
return
true if the two objects are equal
throws
javax.xml.transform.TransformerException


    // In order to handle the 'all' semantics of 
    // nodeset comparisons, we always call the 
    // nodeset function.
    int t = obj2.getType();
    try
    {
	    if (XObject.CLASS_NODESET == t)
	      return obj2.equals(this);
	    // If at least one object to be compared is a boolean, then each object 
	    // to be compared is converted to a boolean as if by applying the 
	    // boolean function. 
	    else if(XObject.CLASS_BOOLEAN == t)
	    	return obj2.bool() == bool();
	    // Otherwise, if at least one object to be compared is a number, then each object 
	    // to be compared is converted to a number as if by applying the number function. 
	    else if(XObject.CLASS_NUMBER == t)
	    	return obj2.num() == num();
    }
    catch(javax.xml.transform.TransformerException te)
    {
    	throw new com.sun.org.apache.xml.internal.utils.WrappedRuntimeException(te);
    }

    // Otherwise, both objects to be compared are converted to strings as 
    // if by applying the string function. 
    return xstr().equals(obj2.xstr());
  
public booleanequals(com.sun.org.apache.xml.internal.utils.XMLString obj2)
Compares this string to the specified object. The result is true if and only if the argument is not null and is a String object that represents the same sequence of characters as this object.

param
obj2 the object to compare this String against.
return
true if the String are equal; false otherwise.
see
java.lang.String#compareTo(java.lang.String)
see
java.lang.String#equalsIgnoreCase(java.lang.String)


    if (!obj2.hasString())
      return obj2.equals(this);
    else
      return str().equals(obj2.toString());
  
public booleanequals(java.lang.Object obj2)
Compares this string to the specified object. The result is true if and only if the argument is not null and is a String object that represents the same sequence of characters as this object.

param
anObject the object to compare this String against. NEEDSDOC @param obj2
return
true if the String are equal; false otherwise.
see
java.lang.String#compareTo(java.lang.String)
see
java.lang.String#equalsIgnoreCase(java.lang.String)


    if (null == obj2)
      return false;

      // In order to handle the 'all' semantics of 
      // nodeset comparisons, we always call the 
      // nodeset function.
    else if (obj2 instanceof XNodeSet)
      return obj2.equals(this);
    else if(obj2 instanceof XNumber)
    	return obj2.equals(this);
    else
      return str().equals(obj2.toString());
  
public booleanequalsIgnoreCase(java.lang.String anotherString)
Compares this String to another String, ignoring case considerations. Two strings are considered equal ignoring case if they are of the same length, and corresponding characters in the two strings are equal ignoring case.

param
anotherString the String to compare this String against.
return
true if the argument is not null and the Strings are equal, ignoring case; false otherwise.
see
#equals(Object)
see
java.lang.Character#toLowerCase(char)
see
java.lang.Character#toUpperCase(char)

    return str().equalsIgnoreCase(anotherString);
  
public com.sun.org.apache.xml.internal.utils.XMLStringfixWhiteSpace(boolean trimHead, boolean trimTail, boolean doublePunctuationSpaces)
Conditionally trim all leading and trailing whitespace in the specified String. All strings of white space are replaced by a single space character (#x20), except spaces after punctuation which receive double spaces if doublePunctuationSpaces is true. This function may be useful to a formatter, but to get first class results, the formatter should probably do it's own white space handling based on the semantics of the formatting object.

param
trimHead Trim leading whitespace?
param
trimTail Trim trailing whitespace?
param
doublePunctuationSpaces Use double spaces for punctuation?
return
The trimmed string.


    // %OPT% !!!!!!!
    int len = this.length();
    char[] buf = new char[len];

    this.getChars(0, len, buf, 0);

    boolean edit = false;
    int s;

    for (s = 0; s < len; s++)
    {
      if (isSpace(buf[s]))
      {
        break;
      }
    }

    /* replace S to ' '. and ' '+ -> single ' '. */
    int d = s;
    boolean pres = false;

    for (; s < len; s++)
    {
      char c = buf[s];

      if (isSpace(c))
      {
        if (!pres)
        {
          if (' " != c)
          {
            edit = true;
          }

          buf[d++] = ' ";

          if (doublePunctuationSpaces && (s != 0))
          {
            char prevChar = buf[s - 1];

            if (!((prevChar == '.") || (prevChar == '!")
                  || (prevChar == '?")))
            {
              pres = true;
            }
          }
          else
          {
            pres = true;
          }
        }
        else
        {
          edit = true;
          pres = true;
        }
      }
      else
      {
        buf[d++] = c;
        pres = false;
      }
    }

    if (trimTail && 1 <= d && ' " == buf[d - 1])
    {
      edit = true;

      d--;
    }

    int start = 0;

    if (trimHead && 0 < d && ' " == buf[0])
    {
      edit = true;

      start++;
    }

    XMLStringFactory xsf = XMLStringFactoryImpl.getFactory();

    return edit ? xsf.newstr(new String(buf, start, d - start)) : this;
  
public voidgetChars(int srcBegin, int srcEnd, char[] dst, int dstBegin)
Copies characters from this string into the destination character array.

param
srcBegin index of the first character in the string to copy.
param
srcEnd index after the last character in the string to copy.
param
dst the destination array.
param
dstBegin the start offset in the destination array.
exception
IndexOutOfBoundsException If any of the following is true:
  • srcBegin is negative.
  • srcBegin is greater than srcEnd
  • srcEnd is greater than the length of this string
  • dstBegin is negative
  • dstBegin+(srcEnd-srcBegin) is larger than dst.length
exception
NullPointerException if dst is null

    str().getChars(srcBegin, srcEnd, dst, dstBegin);
  
public intgetType()
Tell that this is a CLASS_STRING.

return
type CLASS_STRING

    return CLASS_STRING;
  
public java.lang.StringgetTypeString()
Given a request type, return the equivalent string. For diagnostic purposes.

return
type string "#STRING"

    return "#STRING";
  
public booleanhasString()
Tell if this object contains a java String object.

return
true if this XMLString can return a string without creating one.

    return true;
  
public inthashCode()
Returns a hashcode for this string. The hashcode for a String object is computed as
s[0]*31^(n-1) + s[1]*31^(n-2) + ... + s[n-1]
using int arithmetic, where s[i] is the ith character of the string, n is the length of the string, and ^ indicates exponentiation. (The hash value of the empty string is zero.)

return
a hash code value for this object.

    return str().hashCode();
  
public intindexOf(int ch)
Returns the index within this string of the first occurrence of the specified character. If a character with value ch occurs in the character sequence represented by this String object, then the index of the first such occurrence is returned -- that is, the smallest value k such that:
this.charAt(k) == ch
is true. If no such character occurs in this string, then -1 is returned.

param
ch a character.
return
the index of the first occurrence of the character in the character sequence represented by this object, or -1 if the character does not occur.

    return str().indexOf(ch);
  
public intindexOf(int ch, int fromIndex)
Returns the index within this string of the first occurrence of the specified character, starting the search at the specified index.

If a character with value ch occurs in the character sequence represented by this String object at an index no smaller than fromIndex, then the index of the first such occurrence is returned--that is, the smallest value k such that:

(this.charAt(k) == ch) && (k >= fromIndex)
is true. If no such character occurs in this string at or after position fromIndex, then -1 is returned.

There is no restriction on the value of fromIndex. If it is negative, it has the same effect as if it were zero: this entire string may be searched. If it is greater than the length of this string, it has the same effect as if it were equal to the length of this string: -1 is returned.

param
ch a character.
param
fromIndex the index to start the search from.
return
the index of the first occurrence of the character in the character sequence represented by this object that is greater than or equal to fromIndex, or -1 if the character does not occur.

    return str().indexOf(ch, fromIndex);
  
public intindexOf(java.lang.String str)
Returns the index within this string of the first occurrence of the specified substring. The integer returned is the smallest value k such that:
this.startsWith(str, k)
is true.

param
str any string.
return
if the string argument occurs as a substring within this object, then the index of the first character of the first such substring is returned; if it does not occur as a substring, -1 is returned.
exception
java.lang.NullPointerException if str is null.

    return str().indexOf(str);
  
public intindexOf(com.sun.org.apache.xml.internal.utils.XMLString str)
Returns the index within this string of the first occurrence of the specified substring. The integer returned is the smallest value k such that:
this.startsWith(str, k)
is true.

param
str any string.
return
if the string argument occurs as a substring within this object, then the index of the first character of the first such substring is returned; if it does not occur as a substring, -1 is returned.
exception
java.lang.NullPointerException if str is null.

    return str().indexOf(str.toString());
  
public intindexOf(java.lang.String str, int fromIndex)
Returns the index within this string of the first occurrence of the specified substring, starting at the specified index. The integer returned is the smallest value k such that:
this.startsWith(str, k) && (k >= fromIndex)
is true.

There is no restriction on the value of fromIndex. If it is negative, it has the same effect as if it were zero: this entire string may be searched. If it is greater than the length of this string, it has the same effect as if it were equal to the length of this string: -1 is returned.

param
str the substring to search for.
param
fromIndex the index to start the search from.
return
If the string argument occurs as a substring within this object at a starting index no smaller than fromIndex, then the index of the first character of the first such substring is returned. If it does not occur as a substring starting at fromIndex or beyond, -1 is returned.
exception
java.lang.NullPointerException if str is null

    return str().indexOf(str, fromIndex);
  
private static booleanisSpace(char ch)
Returns whether the specified ch conforms to the XML 1.0 definition of whitespace. Refer to the definition of S for details.

param
ch Character to check as XML whitespace.
return
=true if ch is XML whitespace; otherwise =false.

    return XMLCharacterRecognizer.isWhiteSpace(ch);  // Take the easy way out for now.
  
public intlastIndexOf(int ch)
Returns the index within this string of the last occurrence of the specified character. That is, the index returned is the largest value k such that:
this.charAt(k) == ch
is true. The String is searched backwards starting at the last character.

param
ch a character.
return
the index of the last occurrence of the character in the character sequence represented by this object, or -1 if the character does not occur.

    return str().lastIndexOf(ch);
  
public intlastIndexOf(int ch, int fromIndex)
Returns the index within this string of the last occurrence of the specified character, searching backward starting at the specified index. That is, the index returned is the largest value k such that:
this.charAt(k) == ch) && (k <= fromIndex)
is true.

param
ch a character.
param
fromIndex the index to start the search from. There is no restriction on the value of fromIndex. If it is greater than or equal to the length of this string, it has the same effect as if it were equal to one less than the length of this string: this entire string may be searched. If it is negative, it has the same effect as if it were -1: -1 is returned.
return
the index of the last occurrence of the character in the character sequence represented by this object that is less than or equal to fromIndex, or -1 if the character does not occur before that point.

    return str().lastIndexOf(ch, fromIndex);
  
public intlastIndexOf(java.lang.String str)
Returns the index within this string of the rightmost occurrence of the specified substring. The rightmost empty string "" is considered to occur at the index value this.length(). The returned index is the largest value k such that
this.startsWith(str, k)
is true.

param
str the substring to search for.
return
if the string argument occurs one or more times as a substring within this object, then the index of the first character of the last such substring is returned. If it does not occur as a substring, -1 is returned.
exception
java.lang.NullPointerException if str is null.

    return str().lastIndexOf(str);
  
public intlastIndexOf(java.lang.String str, int fromIndex)
Returns the index within this string of the last occurrence of the specified substring.

param
str the substring to search for.
param
fromIndex the index to start the search from. There is no restriction on the value of fromIndex. If it is greater than the length of this string, it has the same effect as if it were equal to the length of this string: this entire string may be searched. If it is negative, it has the same effect as if it were -1: -1 is returned.
return
If the string argument occurs one or more times as a substring within this object at a starting index no greater than fromIndex, then the index of the first character of the last such substring is returned. If it does not occur as a substring starting at fromIndex or earlier, -1 is returned.
exception
java.lang.NullPointerException if str is null.

    return str().lastIndexOf(str, fromIndex);
  
public intlength()
Returns the length of this string.

return
the length of the sequence of characters represented by this object.

    return str().length();
  
public doublenum()
Cast result object to a number.

return
0.0 if this string is null, numeric value of this string or NaN

    return toDouble();
  
public intrtf(com.sun.org.apache.xpath.internal.XPathContext support)
Cast result object to a result tree fragment.

param
support Xpath context to use for the conversion
return
A document fragment with this string as a child node


    DTM frag = support.createDocumentFragment();

    frag.appendTextChild(str());

    return frag.getDocument();
  
public booleanstartsWith(java.lang.String prefix, int toffset)
Tests if this string starts with the specified prefix beginning a specified index.

param
prefix the prefix.
param
toffset where to begin looking in the string.
return
true if the character sequence represented by the argument is a prefix of the substring of this object starting at index toffset; false otherwise. The result is false if toffset is negative or greater than the length of this String object; otherwise the result is the same as the result of the expression
this.subString(toffset).startsWith(prefix)
exception
java.lang.NullPointerException if prefix is null.

    return str().startsWith(prefix, toffset);
  
public booleanstartsWith(java.lang.String prefix)
Tests if this string starts with the specified prefix.

param
prefix the prefix.
return
true if the character sequence represented by the argument is a prefix of the character sequence represented by this string; false otherwise. Note also that true will be returned if the argument is an empty string or is equal to this String object as determined by the {@link #equals(Object)} method.
exception
java.lang.NullPointerException if prefix is null.

    return startsWith(prefix, 0);
  
public booleanstartsWith(com.sun.org.apache.xml.internal.utils.XMLString prefix, int toffset)
Tests if this string starts with the specified prefix beginning a specified index.

param
prefix the prefix.
param
toffset where to begin looking in the string.
return
true if the character sequence represented by the argument is a prefix of the substring of this object starting at index toffset; false otherwise. The result is false if toffset is negative or greater than the length of this String object; otherwise the result is the same as the result of the expression
this.subString(toffset).startsWith(prefix)
exception
java.lang.NullPointerException if prefix is null.


    int to = toffset;
    int tlim = this.length();
    int po = 0;
    int pc = prefix.length();

    // Note: toffset might be near -1>>>1.
    if ((toffset < 0) || (toffset > tlim - pc))
    {
      return false;
    }

    while (--pc >= 0)
    {
      if (this.charAt(to) != prefix.charAt(po))
      {
        return false;
      }

      to++;
      po++;
    }

    return true;
  
public booleanstartsWith(com.sun.org.apache.xml.internal.utils.XMLString prefix)
Tests if this string starts with the specified prefix.

param
prefix the prefix.
return
true if the character sequence represented by the argument is a prefix of the character sequence represented by this string; false otherwise. Note also that true will be returned if the argument is an empty string or is equal to this String object as determined by the {@link #equals(Object)} method.
exception
java.lang.NullPointerException if prefix is null.

    return startsWith(prefix, 0);
  
public java.lang.Stringstr()
Cast result object to a string.

return
The string this wraps or the empty string if null

    return (null != m_obj) ? ((String) m_obj) : "";
  
public com.sun.org.apache.xml.internal.utils.XMLStringsubstring(int beginIndex)
Returns a new string that is a substring of this string. The substring begins with the character at the specified index and extends to the end of this string.

Examples:

"unhappy".substring(2) returns "happy"
"Harbison".substring(3) returns "bison"
"emptiness".substring(9) returns "" (an empty string)

param
beginIndex the beginning index, inclusive.
return
the specified substring.
exception
IndexOutOfBoundsException if beginIndex is negative or larger than the length of this String object.

    return new XString(str().substring(beginIndex));
  
public com.sun.org.apache.xml.internal.utils.XMLStringsubstring(int beginIndex, int endIndex)
Returns a new string that is a substring of this string. The substring begins at the specified beginIndex and extends to the character at index endIndex - 1. Thus the length of the substring is endIndex-beginIndex.

param
beginIndex the beginning index, inclusive.
param
endIndex the ending index, exclusive.
return
the specified substring.
exception
IndexOutOfBoundsException if the beginIndex is negative, or endIndex is larger than the length of this String object, or beginIndex is larger than endIndex.

    return new XString(str().substring(beginIndex, endIndex));
  
public doubletoDouble()
Convert a string to a double -- Allowed input is in fixed notation ddd.fff.

return
A double value representation of the string, or return Double.NaN if the string can not be converted.

    int end = length();
    
    if(0 == end)
      return Double.NaN;

    double result = 0.0;
    int start = 0;
    int punctPos = end-1;

    // Scan to first whitespace character.
    for (int i = start; i < end; i++)
    {
      char c = charAt(i);

      if (!XMLCharacterRecognizer.isWhiteSpace(c))
      {
        break;
      }
      else
        start++;
    }

    double sign = 1.0;

    if (start < end && charAt(start) == '-")
    {
      sign = -1.0;

      start++;
    }

    int digitsFound = 0;

    for (int i = start; i < end; i++)  // parse the string from left to right converting the integer part
    {
      char c = charAt(i);

      if (c != '.")
      {
        if (XMLCharacterRecognizer.isWhiteSpace(c))
          break;
        else if (Character.isDigit(c))
        {
          result = result * 10.0 + (c - 0x30);

          digitsFound++;
        }
        else
        {
          return Double.NaN;
        }
      }
      else
      {
        punctPos = i;

        break;
      }
    }

    if (charAt(punctPos) == '.")  // parse the string from the end to the '.' converting the fractional part
    {
      double fractPart = 0.0;

      for (int i = end - 1; i > punctPos; i--)
      {
        char c = charAt(i);

        if (XMLCharacterRecognizer.isWhiteSpace(c))
          break;
        else if (Character.isDigit(c))
        {
          fractPart = fractPart / 10.0 + (c - 0x30);

          digitsFound++;
        }
        else
        {
          return Double.NaN;
        }
      }

      result += fractPart / 10.0;
    }

    if (0 == digitsFound)
      return Double.NaN;

    return result * sign;
  
public com.sun.org.apache.xml.internal.utils.XMLStringtoLowerCase(java.util.Locale locale)
Converts all of the characters in this String to lower case using the rules of the given Locale.

param
locale use the case transformation rules for this locale
return
the String, converted to lowercase.
see
java.lang.Character#toLowerCase(char)
see
java.lang.String#toUpperCase(Locale)

    return new XString(str().toLowerCase(locale));
  
public com.sun.org.apache.xml.internal.utils.XMLStringtoLowerCase()
Converts all of the characters in this String to lower case using the rules of the default locale, which is returned by Locale.getDefault.

return
the string, converted to lowercase.
see
java.lang.Character#toLowerCase(char)
see
java.lang.String#toLowerCase(Locale)

    return new XString(str().toLowerCase());
  
public com.sun.org.apache.xml.internal.utils.XMLStringtoUpperCase(java.util.Locale locale)
Converts all of the characters in this String to upper case using the rules of the given locale.

param
locale use the case transformation rules for this locale
return
the String, converted to uppercase.
see
java.lang.Character#toUpperCase(char)
see
java.lang.String#toLowerCase(Locale)

    return new XString(str().toUpperCase(locale));
  
public com.sun.org.apache.xml.internal.utils.XMLStringtoUpperCase()
Converts all of the characters in this String to upper case using the rules of the default locale, which is returned by Locale.getDefault.

If no character in this string has a different uppercase version, based on calling the toUpperCase method defined by Character, then the original string is returned.

Otherwise, this method creates a new String object representing a character sequence identical in length to the character sequence represented by this String object and with every character equal to the result of applying the method Character.toUpperCase to the corresponding character of this String object.

Examples:

"Fahrvergngen".toUpperCase() returns "FAHRVERGNGEN"
"Visit Ljubinje!".toUpperCase() returns "VISIT LJUBINJE!"

return
the string, converted to uppercase.
see
java.lang.Character#toUpperCase(char)
see
java.lang.String#toUpperCase(Locale)

    return new XString(str().toUpperCase());
  
public com.sun.org.apache.xml.internal.utils.XMLStringtrim()
Removes white space from both ends of this string.

return
this string, with white space removed from the front and end.

    return new XString(str().trim());
  
public com.sun.org.apache.xml.internal.utils.XMLStringxstr()
Cast result object to a string.

return
The string this wraps or the empty string if null

    return this;