Java XMLString.length方法代码示例

import com.sun.org.apache.xml.internal.utils.XMLString; //导入方法依赖的package包/类
/**
 * Compares two strings lexicographically.
 *
 * @param   xstr   the <code>String</code> to be compared.
 *
 * @return  the value <code>0</code> if the argument string is equal to
 *          this string; a value less than <code>0</code> if this string
 *          is lexicographically less than the string argument; and a
 *          value greater than <code>0</code> if this string is
 *          lexicographically greater than the string argument.
 * @exception java.lang.NullPointerException if <code>anotherString</code>
 *          is <code>null</code>.
 */
public int compareTo(XMLString xstr)
{

  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;
}
 

import com.sun.org.apache.xml.internal.utils.XMLString; //导入方法依赖的package包/类
/**
   * 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.
   */
  public double toDouble()
  {
    /* XMLCharacterRecognizer.isWhiteSpace(char c) methods treats the following
     * characters as white space characters.
     * ht - horizontal tab, nl - newline , cr - carriage return and sp - space
     * trim() methods by default also takes care of these white space characters
     * So trim() method is used to remove leading and trailing white spaces.
     */
        XMLString s = trim();
        double result = Double.NaN;
        for (int i = 0; i < s.length(); i++)
        {
                char c = s.charAt(i);
    if (c != '-' && c != '.' && ( c < 0X30 || c > 0x39)) {
            // The character is not a '-' or a '.' or a digit
            // then return NaN because something is wrong.
                        return result;
        }
        }
        try
        {
                result = Double.parseDouble(s.toString());
        } catch (NumberFormatException e){}

        return result;
}
 

import com.sun.org.apache.xml.internal.utils.XMLString; //导入方法依赖的package包/类
/**
 * 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  <code>true</code> if the character sequence represented by the
 *          argument is a prefix of the substring of this object starting
 *          at index <code>toffset</code>; <code>false</code> otherwise.
 *          The result is <code>false</code> if <code>toffset</code> is
 *          negative or greater than the length of this
 *          <code>String</code> object; otherwise the result is the same
 *          as the result of the expression
 *          <pre>
 *          this.subString(toffset).startsWith(prefix)
 *          </pre>
 * @exception java.lang.NullPointerException if <code>prefix</code> is
 *          <code>null</code>.
 */
public boolean startsWith(XMLString prefix, int toffset)
{

  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;
}
 

import com.sun.org.apache.xml.internal.utils.XMLString; //导入方法依赖的package包/类
/**
 * Compares this string to the specified object.
 * The result is <code>true</code> if and only if the argument is not
 * <code>null</code> and is a <code>String</code> object that represents
 * the same sequence of characters as this object.
 *
 * @param   obj2       the object to compare this <code>String</code>
 *                     against.
 *
 * @return  <code>true</code> if the <code>String </code>are equal;
 *          <code>false</code> otherwise.
 * @see     java.lang.String#compareTo(java.lang.String)
 * @see     java.lang.String#equalsIgnoreCase(java.lang.String)
 */
public boolean equals(XMLString obj2)
{

  if (this == obj2)
  {
    return true;
  }

  int n = m_length;

  if (n == obj2.length())
  {
    FastStringBuffer fsb = fsb();
    int i = m_start;
    int j = 0;

    while (n-- != 0)
    {
      if (fsb.charAt(i) != obj2.charAt(j))
      {
        return false;
      }

      i++;
      j++;
    }

    return true;
  }

  return false;
}
 

import com.sun.org.apache.xml.internal.utils.XMLString; //导入方法依赖的package包/类
/**
 * Compares two strings lexicographically.
 *
 * @param   xstr   the <code>String</code> to be compared.
 *
 * @return  the value <code>0</code> if the argument string is equal to
 *          this string; a value less than <code>0</code> if this string
 *          is lexicographically less than the string argument; and a
 *          value greater than <code>0</code> if this string is
 *          lexicographically greater than the string argument.
 * @exception java.lang.NullPointerException if <code>anotherString</code>
 *          is <code>null</code>.
 */
public int compareTo(XMLString xstr)
{

  int len1 = m_length;
  int len2 = xstr.length();
  int n = Math.min(len1, len2);
  FastStringBuffer fsb = fsb();
  int i = m_start;
  int j = 0;

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

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

    i++;
    j++;
  }

  return len1 - len2;
}
 

import com.sun.org.apache.xml.internal.utils.XMLString; //导入方法依赖的package包/类
/**
 * Compares two strings lexicographically, ignoring case considerations.
 * This method returns an integer whose sign is that of
 * <code>this.toUpperCase().toLowerCase().compareTo(
 * str.toUpperCase().toLowerCase())</code>.
 * <p>
 * Note that this method does <em>not</em> take locale into account,
 * and will result in an unsatisfactory ordering for certain locales.
 * The java.text package provides <em>collators</em> to allow
 * locale-sensitive ordering.
 *
 * @param   xstr   the <code>String</code> 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
 */
public int compareToIgnoreCase(XMLString xstr)
{

  int len1 = m_length;
  int len2 = xstr.length();
  int n = Math.min(len1, len2);
  FastStringBuffer fsb = fsb();
  int i = m_start;
  int j = 0;

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

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

    i++;
    j++;
  }

  return len1 - len2;
}
 

import com.sun.org.apache.xml.internal.utils.XMLString; //导入方法依赖的package包/类
/**
 * 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  <code>true</code> if the character sequence represented by the
 *          argument is a prefix of the substring of this object starting
 *          at index <code>toffset</code>; <code>false</code> otherwise.
 *          The result is <code>false</code> if <code>toffset</code> is
 *          negative or greater than the length of this
 *          <code>String</code> object; otherwise the result is the same
 *          as the result of the expression
 *          <pre>
 *          this.subString(toffset).startsWith(prefix)
 *          </pre>
 * @exception java.lang.NullPointerException if <code>prefix</code> is
 *          <code>null</code>.
 */
public boolean startsWith(XMLString prefix, int toffset)
{

  FastStringBuffer fsb = fsb();
  int to = m_start + toffset;
  int tlim = m_start + m_length;
  int po = 0;
  int pc = prefix.length();

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

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

    to++;
    po++;
  }

  return true;
}
 

import com.sun.org.apache.xml.internal.utils.XMLString; //导入方法依赖的package包/类
/**
 * Execute the function.  The function must return
 * a valid object.
 * @param xctxt The current execution context.
 * @return A valid XObject.
 *
 * @throws javax.xml.transform.TransformerException
 */
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
{

  XMLString s1 = m_arg0.execute(xctxt).xstr();
  double start = m_arg1.execute(xctxt).num();
  int lenOfS1 = s1.length();
  XMLString substr;

  if (lenOfS1 <= 0)
    return XString.EMPTYSTRING;
  else
  {
    int startIndex;

    if (Double.isNaN(start))
    {

      // Double.MIN_VALUE doesn't work with math below
      // so just use a big number and hope I never get caught.
      start = -1000000;
      startIndex = 0;
    }
    else
    {
      start = Math.round(start);
      startIndex = (start > 0) ? (int) start - 1 : 0;
    }

    if (null != m_arg2)
    {
      double len = m_arg2.num(xctxt);
      int end = (int) (Math.round(len) + start) - 1;

      // Normalize end index.
      if (end < 0)
        end = 0;
      else if (end > lenOfS1)
        end = lenOfS1;

      if (startIndex > lenOfS1)
        startIndex = lenOfS1;

      substr = s1.substring(startIndex, end);
    }
    else
    {
      if (startIndex > lenOfS1)
        startIndex = lenOfS1;
      substr = s1.substring(startIndex);
    }
  }

  return (XString)substr; // cast semi-safe
}