java.text.StringCharacterIterator Java Examples

/**
 * Return <tt>aText</tt> with all <tt>'<'</tt> and <tt>'>'</tt> characters
 * replaced by their escaped equivalents.
 */
public static String toDisableTags(String aText) {
    final StringBuilder result = new StringBuilder();
    final StringCharacterIterator iterator = new StringCharacterIterator(aText);
    char character = iterator.current();
    while (character != CharacterIterator.DONE) {
        if (character == '<') {
            result.append("&lt;");
        } else if (character == '>') {
            result.append("&gt;");
        } else {
            //the char is not a special one
            //add it to the result as is
            result.append(character);
        }
        character = iterator.next();
    }
    return result.toString();
}
 

private boolean literal(String text) {
	CharacterIterator ci = new StringCharacterIterator(text);
	char t = ci.first();
	if (c != t)
		return false;

	int start = col;
	boolean ret = true;
	for (t = ci.next(); t != CharacterIterator.DONE; t = ci.next()) {
		if (t != nextCharacter()) {
			ret = false;
			break;
		}
	}
	nextCharacter();
	if (!ret)
		error("literal " + text, start);
	return ret;
}
 

private boolean valid(String input) {
	if ("".equals(input))
		return true;

	boolean ret = true;
	it = new StringCharacterIterator(input);
	c = it.first();
	col = 1;
	if (!value()) {
		ret = error("value", 1);
	} else {
		skipWhiteSpace();
		if (c != CharacterIterator.DONE) {
			ret = error("end", col);
		}
	}

	return ret;
}
 

/**
 * Return <tt>aText</tt> with all <tt>'<'</tt> and <tt>'>'</tt> characters replaced by their
 * escaped equivalents.
 *
 * @param aText the a text
 * @return the string
 */
public static String toDisableTags(String aText) {
  final StringBuilder result = new StringBuilder();
  final StringCharacterIterator iterator = new StringCharacterIterator(aText);
  char character = iterator.current();
  while (character != CharacterIterator.DONE) {
    switch (character) {
      case '<':
        result.append("&lt;");
        break;
      case '>':
        result.append("&gt;");
        break;
      default:
        // the char is not a special one
        // add it to the result as is
        result.append(character);
        break;
    }
    character = iterator.next();
  }
  return result.toString();
}
 

public void TestBug4153072() {
    BreakIterator iter = BreakIterator.getWordInstance();
    String str = "...Hello, World!...";
    int begin = 3;
    int end = str.length() - 3;
    boolean gotException = false;
    boolean dummy;

    iter.setText(new StringCharacterIterator(str, begin, end, begin));
    for (int index = -1; index < begin + 1; ++index) {
        try {
            dummy = iter.isBoundary(index);
            if (index < begin)
                errln("Didn't get exception with offset = " + index +
                                " and begin index = " + begin);
        }
        catch (IllegalArgumentException e) {
            if (index >= begin)
                errln("Got exception with offset = " + index +
                                " and begin index = " + begin);
        }
    }
}
 

private void string(Object obj) {
    add('"');
    CharacterIterator it = new StringCharacterIterator(obj.toString());
    for (char c = it.first(); c != CharacterIterator.DONE; c = it.next()) {
        if (c == '"') { add("\\\""); } else if (c == '\\') { add("\\\\"); } else if (c == '/') { add("\\/"); } else if (c == '\b') {
            add("\\b");
        } else if (c
                == '\f') { add("\\f"); } else if (c == '\n') {
            add("\\n");
        } else if (c
                == '\r') { add("\\r"); } else if (c
                == '\t') { add("\\t"); } else if (Character
                .isISOControl(c)) {
            unicode(c);
        } else {
            add(c);
        }
    }
    add('"');
}
 

public void TestBug4153072() {
    BreakIterator iter = BreakIterator.getWordInstance();
    String str = "...Hello, World!...";
    int begin = 3;
    int end = str.length() - 3;
    boolean gotException = false;
    boolean dummy;

    iter.setText(new StringCharacterIterator(str, begin, end, begin));
    for (int index = -1; index < begin + 1; ++index) {
        try {
            dummy = iter.isBoundary(index);
            if (index < begin)
                errln("Didn't get exception with offset = " + index +
                                " and begin index = " + begin);
        }
        catch (IllegalArgumentException e) {
            if (index >= begin)
                errln("Got exception with offset = " + index +
                                " and begin index = " + begin);
        }
    }
}
 

/**
 * Escapes certain characters inappropriate for textual output.
 *
 * <p>Since this method does not hurt, and may be useful in other regards, it will be retained
 * for now.
 *
 * @param original is a string that needs to be quoted
 * @return a string that is "safe" to print.
 */
public static String escape(String original) {
    if (original == null) return null;
    StringBuilder result = new StringBuilder(2 * original.length());
    StringCharacterIterator i = new StringCharacterIterator(original);
    for (char ch = i.first(); ch != StringCharacterIterator.DONE; ch = i.next()) {
        if (ch == '\r') {
            result.append("\\r");
        } else if (ch == '\n') {
            result.append("\\n");
        } else if (ch == '\t') {
            result.append("\\t");
        } else {
            // DO NOT escape apostrophe. If apostrophe escaping is required,
            // do it beforehand.
            if (ch == '\"' || ch == '\\') result.append('\\');
            result.append(ch);
        }
    }

    return result.toString();
}
 

/**
 * Decodes an Uri with % characters.
 * 
 * @param uri
 *            String with the uri possibly containing % characters.
 * @return The decoded Uri
 */
private static String decodeUri(String uri) {
	if (uri.indexOf('%') == -1) {
		return uri;
	}
	StringBuffer sb = new StringBuffer();
	CharacterIterator iter = new StringCharacterIterator(uri);
	for (char c = iter.first(); c != CharacterIterator.DONE; c = iter.next()) {
		if (c == '%') {
			char c1 = iter.next();
			if (c1 != CharacterIterator.DONE) {
				int i1 = Character.digit(c1, 16);
				char c2 = iter.next();
				if (c2 != CharacterIterator.DONE) {
					int i2 = Character.digit(c2, 16);
					sb.append((char) ((i1 << 4) + i2));
				}
			}
		} else {
			sb.append(c);
		}
	}
	String path = sb.toString();
	return path;
}
 

private boolean valid(String input) {
    if ("".equals(input)) { return true; }

    boolean ret = true;
    it = new StringCharacterIterator(input);
    c = it.first();
    col = 1;
    if (!value()) {
        ret = error("value", 1);
    } else {
        skipWhiteSpace();
        if (c != CharacterIterator.DONE) {
            ret = error("end", col);
        }
    }

    return ret;
}
 

private boolean literal(String text) {
    CharacterIterator ci = new StringCharacterIterator(text);
    char t = ci.first();
    if (c != t) { return false; }

    int start = col;
    boolean ret = true;
    for (t = ci.next(); t != CharacterIterator.DONE; t = ci.next()) {
        if (t != nextCharacter()) {
            ret = false;
            break;
        }
    }
    nextCharacter();

    if (!ret) { error("literal " + text, start); }
    return ret;
}
 

public void TestBug4153072() {
    BreakIterator iter = BreakIterator.getWordInstance();
    String str = "...Hello, World!...";
    int begin = 3;
    int end = str.length() - 3;
    boolean gotException = false;
    boolean dummy;

    iter.setText(new StringCharacterIterator(str, begin, end, begin));
    for (int index = -1; index < begin + 1; ++index) {
        try {
            dummy = iter.isBoundary(index);
            if (index < begin)
                errln("Didn't get exception with offset = " + index +
                                " and begin index = " + begin);
        }
        catch (IllegalArgumentException e) {
            if (index >= begin)
                errln("Got exception with offset = " + index +
                                " and begin index = " + begin);
        }
    }
}
 

/**
* Return <tt>aText</tt> with all <tt>'<'</tt> and <tt>'>'</tt> characters
* replaced by their escaped equivalents.
*/
public static String toDisableTags(String aText){
  final StringBuilder result = new StringBuilder();
  final StringCharacterIterator iterator = new StringCharacterIterator(aText);
  char character =  iterator.current();
  while (character != CharacterIterator.DONE ){
    if (character == '<') {
      result.append("&lt;");
    }
    else if (character == '>') {
      result.append("&gt;");
    }
    else {
      //the char is not a special one
      //add it to the result as is
      result.append(character);
    }
    character = iterator.next();
  }
  return result.toString();
}
 

private void string(Object obj) {
    add('"');
    CharacterIterator it = new StringCharacterIterator(obj.toString());
    for (char c = it.first(); c != CharacterIterator.DONE; c = it.next()) {
        if (c == '"') add("\\\"");
        else if (c == '\\') add("\\\\");
        else if (c == '/') add("\\/");
        else if (c == '\b') add("\\b");
        else if (c == '\f') add("\\f");
        else if (c == '\n') add("\\n");
        else if (c == '\r') add("\\r");
        else if (c == '\t') add("\\t");
        else if (Character.isISOControl(c)) {
            unicode(c);
        } else {
            add(c);
        }
    }
    add('"');
}
 

/**
 * Notifies the attached observers that the underlying data has been changed
 * and any View reflecting the data set should refresh itself.
 */
public void notifyDataSetChanged() {
    this.filteredList.clear();
    if (filter == null || filter.length() == 0) {
        this.filteredList.addAll(this.list);
    }
    else {
        for (BlobDescriptor bd : this.list) {
            StringSearch stringSearch = new StringSearch(
                    filter, new StringCharacterIterator(bd.key), filterCollator);
            int matchPos = stringSearch.first();
            if (matchPos != StringSearch.DONE) {
                this.filteredList.add(bd);
            }
        }
    }
    sortOrderChanged();
}
 

/**
 * Escape characters for text appearing as XML data, between tags.
 *
 * <P>The following characters are replaced with corresponding character entities :
 * <table border='1' cellpadding='3' cellspacing='0'>
 * <tr><th> Character </th><th> Encoding </th></tr>
 * <tr><td> < </td><td> &lt; </td></tr>
 * <tr><td> > </td><td> &gt; </td></tr>
 * <tr><td> & </td><td> &amp; </td></tr>
 * <tr><td> " </td><td> &quot;</td></tr>
 * <tr><td> ' </td><td> &#039;</td></tr>
 * </table>
 *
 * <P>Note that JSTL's {@code <c:out>} escapes the exact same set of
 * characters as this method. <span class='highlight'>That is, {@code <c:out>}
 *  is good for escaping to produce valid XML, but not for producing safe
 *  HTML.</span>
 */
public static String forXML(String aText) {
    final StringBuilder result = new StringBuilder();
    final StringCharacterIterator iterator = new StringCharacterIterator(aText);
    char character = iterator.current();
    while (character != CharacterIterator.DONE) {
        if (character == '<') {
            result.append("&lt;");
        } else if (character == '>') {
            result.append("&gt;");
        } else if (character == '\"') {
            result.append("&quot;");
        } else if (character == '\'') {
            result.append("&#039;");
        } else if (character == '&') {
            result.append("&amp;");
        } else {
            //the char is not a special one
            //add it to the result as is
            result.append(character);
        }
        character = iterator.next();
    }
    return result.toString();
}
 

private boolean valid(String input) {
    if ("".equals(input)) { return true; }

    boolean ret = true;
    it = new StringCharacterIterator(input);
    c = it.first();
    col = 1;
    if (!value()) {
        ret = false;
    } else {
        skipWhiteSpace();
        if (c != CharacterIterator.DONE) {
            ret = false;
        }
    }

    return ret;
}
 

public void TestBug4153072() {
    BreakIterator iter = BreakIterator.getWordInstance();
    String str = "...Hello, World!...";
    int begin = 3;
    int end = str.length() - 3;
    boolean gotException = false;
    boolean dummy;

    iter.setText(new StringCharacterIterator(str, begin, end, begin));
    for (int index = -1; index < begin + 1; ++index) {
        try {
            dummy = iter.isBoundary(index);
            if (index < begin)
                errln("Didn't get exception with offset = " + index +
                                " and begin index = " + begin);
        }
        catch (IllegalArgumentException e) {
            if (index >= begin)
                errln("Got exception with offset = " + index +
                                " and begin index = " + begin);
        }
    }
}
 

static String escapeCharacters( String value )
{
	final StringCharacterIterator iterator = new StringCharacterIterator( value );
	char character = iterator.current( );
	final StringBuffer result = new StringBuffer( );

	while ( character != StringCharacterIterator.DONE )
	{
		if ( character == '\\' )
		{
			result.append( "\\" ); //$NON-NLS-1$
		}
		else
		{
			//the char is not a special one
			//add it to the result as is
			result.append( character );
		}
		character = iterator.next( );
	}
	return result.toString( );

}
 

@Test
public void TestDiactricMatch() {
    String pattern = "pattern";
    String text = "text";
    StringSearch strsrch = null;
    try {
        strsrch = new StringSearch(pattern, text);
    } catch (Exception e) {
        errln("Error opening string search ");
        return;
    }

    for (int count = 0; count < DIACTRICMATCH.length; count++) {
        strsrch.setCollator(getCollator(DIACTRICMATCH[count].collator));
        strsrch.getCollator().setStrength(DIACTRICMATCH[count].strength);
        strsrch.setBreakIterator(getBreakIterator(DIACTRICMATCH[count].breaker));
        strsrch.reset();
        text = DIACTRICMATCH[count].text;
        pattern = DIACTRICMATCH[count].pattern;
        strsrch.setTarget(new StringCharacterIterator(text));
        strsrch.setPattern(pattern);
        if (!assertEqualWithStringSearch(strsrch, DIACTRICMATCH[count])) {
            errln("Error at test number " + count);
        }
    }
}
 

private boolean valid(String input) {
    if ("".equals(input)) return true;
    
    boolean ret = true;
    it = new StringCharacterIterator(input);
    c = it.first();
    col = 1;
    if (!value()) {
        ret = error("value", 1);
    } else {
        skipWhiteSpace();
        if (c != CharacterIterator.DONE) {
            ret = error("end", col);
        }
    }
    
    return ret;
}
 

@Test
public void TestReset() {
    StringCharacterIterator text = new StringCharacterIterator("fish fish");
    String pattern = "s";

    StringSearch  strsrch = new StringSearch(pattern, text, m_en_us_, null);
    strsrch.setOverlapping(true);
    strsrch.setCanonical(true);
    strsrch.setIndex(9);
    strsrch.reset();
    if (strsrch.isCanonical() || strsrch.isOverlapping() ||
        strsrch.getIndex() != 0 || strsrch.getMatchLength() != 0 ||
        strsrch.getMatchStart() != SearchIterator.DONE) {
            errln("Error resetting string search");
    }

    strsrch.previous();
    if (strsrch.getMatchStart() != 7 || strsrch.getMatchLength() != 1) {
        errln("Error resetting string search\n");
    }
}
 

private boolean valid(String input) {
    if ("".equals(input)) return true;
    
    boolean ret = true;
    it = new StringCharacterIterator(input);
    c = it.first();
    col = 1;
    if (!value()) {
        ret = error("value", 1);
    } else {
        skipWhiteSpace();
        if (c != CharacterIterator.DONE) {
            ret = error("end", col);
        }
    }
    
    return ret;
}
 

public void TestBug4153072() {
    BreakIterator iter = BreakIterator.getWordInstance();
    String str = "...Hello, World!...";
    int begin = 3;
    int end = str.length() - 3;
    boolean gotException = false;
    boolean dummy;

    iter.setText(new StringCharacterIterator(str, begin, end, begin));
    for (int index = -1; index < begin + 1; ++index) {
        try {
            dummy = iter.isBoundary(index);
            if (index < begin)
                errln("Didn't get exception with offset = " + index +
                                " and begin index = " + begin);
        }
        catch (IllegalArgumentException e) {
            if (index >= begin)
                errln("Got exception with offset = " + index +
                                " and begin index = " + begin);
        }
    }
}
 

private boolean literal(String text) {
    CharacterIterator ci = new StringCharacterIterator(text);
    char t = ci.first();
    if (c != t) return false;

    int start = col;
    boolean ret = true;
    for (t = ci.next(); t != CharacterIterator.DONE; t = ci.next()) {
        if (t != nextCharacter()) {
            ret = false;
            break;
        }
    }
    nextCharacter();

    if (!ret) error("literal " + text, start);
    return ret;
}
 

@Test
public void TestBug4153072() {
    BreakIterator iter = BreakIterator.getWordInstance();
    String str = "...Hello, World!...";
    int begin = 3;
    int end = str.length() - 3;
    // not used boolean gotException = false;


    iter.setText(new StringCharacterIterator(str, begin, end, begin));
    for (int index = -1; index < begin + 1; ++index) {
        try {
            iter.isBoundary(index);
            if (index < begin)
                errln("Didn't get exception with offset = " + index +
                                " and begin index = " + begin);
        }
        catch (IllegalArgumentException e) {
            if (index >= begin)
                errln("Got exception with offset = " + index +
                                " and begin index = " + begin);
        }
    }
}
 

public static String reverse(final String value) {
  if (value != null) {
    final CharacterIterator it = new StringCharacterIterator(value);
    final StringBuilder buffer = new StringBuilder();

    for (char c = it.last(); c != CharacterIterator.DONE; c = it.previous()) {
      buffer.append(c);
    }

    return buffer.toString();
  }

  return value;
}
 

/**
 * replaces backslash with forward slash
 * @param str
 * @return
 */
private static String replaceBacklash(String str){
    StringBuilder result = new StringBuilder();
    StringCharacterIterator iterator = new StringCharacterIterator(str);
    char character =  iterator.current();
    while (character != CharacterIterator.DONE ){	     
      if (character == '\\') {
         result.append("/");
      }else {
        result.append(character);
      }	      
      character = iterator.next();
    }
    return result.toString();
}
 

public static String reverse(final String value) {
  if (value != null) {
    final CharacterIterator it = new StringCharacterIterator(value);
    final StringBuilder buffer = new StringBuilder();

    for (char c = it.last(); c != CharacterIterator.DONE; c = it.previous()) {
      buffer.append(c);
    }

    return buffer.toString();
  }

  return value;
}
 

/**
 * For the given string, returns the number of UTF-8 bytes
 * required to encode the string.
 * @param string text to encode
 * @return number of UTF-8 bytes required to encode
 */
public static int utf8Length(String string) {
    CharacterIterator iter = new StringCharacterIterator(string);
    char ch = iter.first();
    int size = 0;
    while (ch != CharacterIterator.DONE) {
        if ((ch >= 0xD800) && (ch < 0xDC00)) {
            // surrogate pair?
            char trail = iter.next();
            if ((trail > 0xDBFF) && (trail < 0xE000)) {
                // valid pair
                size += 4;
            } else {
                // invalid pair
                size += 3;
                iter.previous(); // rewind one
            }
        } else if (ch < 0x80) {
            size++;
        } else if (ch < 0x800) {
            size += 2;
        } else {
            // ch < 0x10000, that is, the largest char value
            size += 3;
        }
        ch = iter.next();
    }
    return size;
}