/*
This file belongs to the Servoy development and deployment environment, Copyright (C) 1997-2010 Servoy BV
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU Affero General Public License as published by the Free
Software Foundation; either version 3 of the License, or (at your option) any
later version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License along
with this program; if not, see http://www.gnu.org/licenses or write to the Free
Software Foundation,Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
*/
package com.servoy.j2db.util.text;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.text.ParseException;
import java.util.ArrayList;
import javax.swing.JFormattedTextField;
/**
* <code>MaskFormatter</code> is used to format and edit strings. The behavior
* of a <code>MaskFormatter</code> is controlled by way of a String mask
* that specifies the valid characters that can be contained at a particular
* location in the <code>Document</code> model. The following characters can
* be specified:
*
* <table border=1 summary="Valid characters and their descriptions">
* <tr>
* <th>Character </th>
* <th><p align="left">Description</p></th>
* </tr>
* <tr>
* <td>#</td>
* <td>Any valid number, uses <code>Character.isDigit</code>.</td>
* </tr>
* <tr>
* <td>'</td>
* <td>Escape character, used to escape any of the
* special formatting characters.</td>
* </tr>
* <tr>
* <td>U</td><td>Any character (<code>Character.isLetter</code>). All
* lowercase letters are mapped to upper case.</td>
* </tr>
* <tr><td>L</td><td>Any character (<code>Character.isLetter</code>). All
* upper case letters are mapped to lower case.</td>
* </tr>
* <tr><td>A</td><td>Any character or number (<code>Character.isLetter</code>
* or <code>Character.isDigit</code>)</td>
* </tr>
* <tr><td>?</td><td>Any character
* (<code>Character.isLetter</code>).</td>
* </tr>
* <tr><td>*</td><td>Anything.</td></tr>
* <tr><td>H</td><td>Any hex character (0-9, a-f or A-F).</td></tr>
* </table>
*
* <p>
* Typically characters correspond to one char, but in certain languages this
* is not the case. The mask is on a per character basis, and will thus
* adjust to fit as many chars as are needed.
* <p>
* You can further restrict the characters that can be input by the
* <code>setInvalidCharacters</code> and <code>setValidCharacters</code>
* methods. <code>setInvalidCharacters</code> allows you to specify
* which characters are not legal. <code>setValidCharacters</code> allows
* you to specify which characters are valid. For example, the following
* code block is equivalent to a mask of '0xHHH' with no invalid/valid
* characters:
* <pre>
* MaskFormatter formatter = new MaskFormatter("0x***");
* formatter.setValidCharacters("0123456789abcdefABCDEF");
* </pre>
* <p>
* When initially formatting a value if the length of the string is
* less than the length of the mask, two things can happen. Either
* the placeholder string will be used, or the placeholder character will
* be used. Precedence is given to the placeholder string. For example:
* <pre>
* MaskFormatter formatter = new MaskFormatter("###-####");
* formatter.setPlaceholderCharacter('_');
* formatter.getDisplayValue(tf, "123");
* </pre>
* <p>
* Would result in the string '123-____'. If
* <code>setPlaceholder("555-1212")</code> was invoked '123-1212' would
* result. The placeholder String is only used on the initial format,
* on subsequent formats only the placeholder character will be used.
* <p>
* If a <code>MaskFormatter</code> is configured to only allow valid characters
* (<code>setAllowsInvalid(false)</code>) literal characters will be skipped as
* necessary when editing. Consider a <code>MaskFormatter</code> with
* the mask "###-####" and current value "555-1212". Using the right
* arrow key to navigate through the field will result in (| indicates the
* position of the caret):
* <pre>
* |555-1212
* 5|55-1212
* 55|5-1212
* 555-|1212
* 555-1|212
* </pre>
* The '-' is a literal (non-editable) character, and is skipped.
* <p>
* Similar behavior will result when editing. Consider inserting the string
* '123-45' and '12345' into the <code>MaskFormatter</code> in the
* previous example. Both inserts will result in the same String,
* '123-45__'. When <code>MaskFormatter</code>
* is processing the insert at character position 3 (the '-'), two things can
* happen:
* <ol>
* <li>If the inserted character is '-', it is accepted.
* <li>If the inserted character matches the mask for the next non-literal
* character, it is accepted at the new location.
* <li>Anything else results in an invalid edit
* </ol>
* <p>
* By default <code>MaskFormatter</code> will not allow invalid edits, you can
* change this with the <code>setAllowsInvalid</code> method, and will
* commit edits on valid edits (use the <code>setCommitsOnValidEdit</code> to
* change this).
* <p>
* By default, <code>MaskFormatter</code> is in overwrite mode. That is as
* characters are typed a new character is not inserted, rather the character
* at the current location is replaced with the newly typed character. You
* can change this behavior by way of the method <code>setOverwriteMode</code>.
* <p>
* <strong>Warning:</strong>
* Serialized objects of this class will not be compatible with
* future Swing releases. The current serialization support is
* appropriate for short term storage or RMI between applications running
* the same version of Swing. As of 1.4, support for long term storage
* of all JavaBeans<sup><font size="-2">TM</font></sup>
* has been added to the <code>java.beans</code> package.
* Please see {@link java.beans.XMLEncoder}.
*
* @version 1.13 11/17/05
* @since 1.4
*/
public class FixedMaskFormatter extends FixedDefaultFormatter
{
// Potential values in mask.
private static final char DIGIT_KEY = '#';
private static final char LITERAL_KEY = '\'';
private static final char UPPERCASE_KEY = 'U';
private static final char LOWERCASE_KEY = 'L';
private static final char ALPHA_NUMERIC_KEY = 'A';
private static final char CHARACTER_KEY = '?';
private static final char ANYTHING_KEY = '*';
private static final char HEX_KEY = 'H';
private static final MaskCharacter[] EmptyMaskChars = new MaskCharacter[0];
/** The user specified mask. */
private String mask;
private transient MaskCharacter[] maskChars;
/** List of valid characters. */
private String validCharacters;
/** List of invalid characters. */
private String invalidCharacters;
/** String used for the passed in value if it does not completely
* fill the mask. */
private String placeholderString;
/** String used to represent characters not present. */
private char placeholder;
/** Indicates if the value contains the literal characters. */
private boolean containsLiteralChars;
/**
* Creates a MaskFormatter with no mask.
*/
public FixedMaskFormatter()
{
setAllowsInvalid(false);
containsLiteralChars = true;
maskChars = EmptyMaskChars;
placeholder = ' ';
}
/**
* Creates a <code>MaskFormatter</code> with the specified mask.
* A <code>ParseException</code>
* will be thrown if <code>mask</code> is an invalid mask.
*
* @throws ParseException if mask does not contain valid mask characters
*/
public FixedMaskFormatter(String mask) throws ParseException
{
this();
setMask(mask);
}
/**
* Sets the mask dictating the legal characters.
* This will throw a <code>ParseException</code> if <code>mask</code> is
* not valid.
*
* @throws ParseException if mask does not contain valid mask characters
*/
public void setMask(String mask) throws ParseException
{
this.mask = mask;
updateInternalMask();
}
/**
* Returns the formatting mask.
*
* @return Mask dictating legal character values.
*/
public String getMask()
{
return mask;
}
/**
* Allows for further restricting of the characters that can be input.
* Only characters specified in the mask, not in the
* <code>invalidCharacters</code>, and in
* <code>validCharacters</code> will be allowed to be input. Passing
* in null (the default) implies the valid characters are only bound
* by the mask and the invalid characters.
*
* @param validCharacters If non-null, specifies legal characters.
*/
public void setValidCharacters(String validCharacters)
{
this.validCharacters = validCharacters;
}
/**
* Returns the valid characters that can be input.
*
* @return Legal characters
*/
public String getValidCharacters()
{
return validCharacters;
}
/**
* Allows for further restricting of the characters that can be input.
* Only characters specified in the mask, not in the
* <code>invalidCharacters</code>, and in
* <code>validCharacters</code> will be allowed to be input. Passing
* in null (the default) implies the valid characters are only bound
* by the mask and the valid characters.
*
* @param invalidCharacters If non-null, specifies illegal characters.
*/
public void setInvalidCharacters(String invalidCharacters)
{
this.invalidCharacters = invalidCharacters;
}
/**
* Returns the characters that are not valid for input.
*
* @return illegal characters.
*/
public String getInvalidCharacters()
{
return invalidCharacters;
}
/**
* Sets the string to use if the value does not completely fill in
* the mask. A null value implies the placeholder char should be used.
*
* @param placeholder String used when formatting if the value does not
* completely fill the mask
*/
public void setPlaceholder(String placeholder)
{
this.placeholderString = placeholder;
}
/**
* Returns the String to use if the value does not completely fill
* in the mask.
*
* @return String used when formatting if the value does not
* completely fill the mask
*/
public String getPlaceholder()
{
return placeholderString;
}
/**
* Sets the character to use in place of characters that are not present
* in the value, ie the user must fill them in. The default value is
* a space.
* <p>
* This is only applicable if the placeholder string has not been
* specified, or does not completely fill in the mask.
*
* @param placeholder Character used when formatting if the value does not
* completely fill the mask
*/
public void setPlaceholderCharacter(char placeholder)
{
this.placeholder = placeholder;
}
/**
* Returns the character to use in place of characters that are not present
* in the value, ie the user must fill them in.
*
* @return Character used when formatting if the value does not
* completely fill the mask
*/
public char getPlaceholderCharacter()
{
return placeholder;
}
protected char getPlaceholderCharacter(int index)
{
if (placeholderString != null && placeholderString.length() > index) return placeholderString.charAt(index);
return getPlaceholderCharacter();
}
/**
* If true, the returned value and set value will also contain the literal
* characters in mask.
* <p>
* For example, if the mask is <code>'(###) ###-####'</code>, the
* current value is <code>'(415) 555-1212'</code>, and
* <code>valueContainsLiteralCharacters</code> is
* true <code>stringToValue</code> will return
* <code>'(415) 555-1212'</code>. On the other hand, if
* <code>valueContainsLiteralCharacters</code> is false,
* <code>stringToValue</code> will return <code>'4155551212'</code>.
*
* @param containsLiteralChars Used to indicate if literal characters in
* mask should be returned in stringToValue
*/
public void setValueContainsLiteralCharacters(boolean containsLiteralChars)
{
this.containsLiteralChars = containsLiteralChars;
}
/**
* Returns true if <code>stringToValue</code> should return literal
* characters in the mask.
*
* @return True if literal characters in mask should be returned in
* stringToValue
*/
public boolean getValueContainsLiteralCharacters()
{
return containsLiteralChars;
}
/**
* Parses the text, returning the appropriate Object representation of
* the String <code>value</code>. This strips the literal characters as
* necessary and invokes supers <code>stringToValue</code>, so that if
* you have specified a value class (<code>setValueClass</code>) an
* instance of it will be created. This will throw a
* <code>ParseException</code> if the value does not match the current
* mask. Refer to {@link #setValueContainsLiteralCharacters} for details
* on how literals are treated.
*
* @throws ParseException if there is an error in the conversion
* @param value String to convert
* @see #setValueContainsLiteralCharacters
* @return Object representation of text
*/
@Override
public Object stringToValue(String value) throws ParseException
{
if (value != null && (value.equals(getPlaceholder())) || value.equals(valueToString(null))) return null;
return stringToValue(value, true);
}
/**
* Returns a String representation of the Object <code>value</code>
* based on the mask. Refer to
* {@link #setValueContainsLiteralCharacters} for details
* on how literals are treated.
*
* @throws ParseException if there is an error in the conversion
* @param value Value to convert
* @see #setValueContainsLiteralCharacters
* @return String representation of value
*/
@Override
public String valueToString(Object value) throws ParseException
{
String sValue = (value == null) ? "" : value.toString(); //$NON-NLS-1$
StringBuffer result = new StringBuffer();
int[] valueCounter = { 0 };
append(result, sValue, valueCounter, getPlaceholder(), maskChars);
return result.toString();
}
/**
* Installs the <code>DefaultFormatter</code> onto a particular
* <code>JFormattedTextField</code>.
* This will invoke <code>valueToString</code> to convert the
* current value from the <code>JFormattedTextField</code> to
* a String. This will then install the <code>Action</code>s from
* <code>getActions</code>, the <code>DocumentFilter</code>
* returned from <code>getDocumentFilter</code> and the
* <code>NavigationFilter</code> returned from
* <code>getNavigationFilter</code> onto the
* <code>JFormattedTextField</code>.
* <p>
* Subclasses will typically only need to override this if they
* wish to install additional listeners on the
* <code>JFormattedTextField</code>.
* <p>
* If there is a <code>ParseException</code> in converting the
* current value to a String, this will set the text to an empty
* String, and mark the <code>JFormattedTextField</code> as being
* in an invalid state.
* <p>
* While this is a public method, this is typically only useful
* for subclassers of <code>JFormattedTextField</code>.
* <code>JFormattedTextField</code> will invoke this method at
* the appropriate times when the value changes, or its internal
* state changes.
*
* @param ftf JFormattedTextField to format for, may be null indicating
* uninstall from current JFormattedTextField.
*/
@Override
public void install(JFormattedTextField ftf)
{
super.install(ftf);
// valueToString doesn't throw, but stringToValue does, need to
// update the editValid state appropriately
if (ftf != null)
{
Object value = ftf.getValue();
try
{
stringToValue(valueToString(value));
}
catch (ParseException pe)
{
setEditValid(false);
}
}
}
/**
* Actual <code>stringToValue</code> implementation.
* If <code>completeMatch</code> is true, the value must exactly match
* the mask, on the other hand if <code>completeMatch</code> is false
* the string must match the mask or the placeholder string.
*/
private Object stringToValue(String value, boolean completeMatch) throws ParseException
{
int errorOffset = -1;
if ((errorOffset = getInvalidOffset(value, completeMatch)) == -1)
{
if (!getValueContainsLiteralCharacters())
{
value = stripLiteralChars(value);
}
return super.stringToValue(value);
}
throw new ParseException("stringToValue passed invalid value", errorOffset); //$NON-NLS-1$
}
/**
* Returns -1 if the passed in string is valid, otherwise the index of
* the first bogus character is returned.
*/
public int getInvalidOffset(String string, boolean completeMatch)
{
int iLength = string.length();
if (iLength != getMaxLength())
{
// trivially false
return iLength;
}
for (int counter = 0, max = string.length(); counter < max; counter++)
{
char aChar = string.charAt(counter);
if (!isValidCharacter(counter, aChar) && (completeMatch || !isPlaceholder(counter, aChar)))
{
return counter;
}
}
return -1;
}
/**
* Invokes <code>append</code> on the mask characters in
* <code>mask</code>.
*/
private void append(StringBuffer result, String value, int[] index, String placeholder, MaskCharacter[] mask) throws ParseException
{
for (MaskCharacter element : mask)
{
element.append(result, value, index, placeholder);
}
}
/**
* Updates the internal representation of the mask.
*/
private void updateInternalMask() throws ParseException
{
String mask = getMask();
ArrayList fixed = new ArrayList();
ArrayList temp = fixed;
if (mask != null)
{
for (int counter = 0, maxCounter = mask.length(); counter < maxCounter; counter++)
{
char maskChar = mask.charAt(counter);
switch (maskChar)
{
case DIGIT_KEY :
temp.add(new DigitMaskCharacter());
break;
case LITERAL_KEY :
if (++counter < maxCounter)
{
maskChar = mask.charAt(counter);
temp.add(new LiteralCharacter(maskChar));
}
// else: Could actually throw if else
break;
case UPPERCASE_KEY :
temp.add(new UpperCaseCharacter());
break;
case LOWERCASE_KEY :
temp.add(new LowerCaseCharacter());
break;
case ALPHA_NUMERIC_KEY :
temp.add(new AlphaNumericCharacter());
break;
case CHARACTER_KEY :
temp.add(new CharCharacter());
break;
case ANYTHING_KEY :
temp.add(new MaskCharacter());
break;
case HEX_KEY :
temp.add(new HexCharacter());
break;
default :
temp.add(new LiteralCharacter(maskChar));
break;
}
}
}
if (fixed.size() == 0)
{
maskChars = EmptyMaskChars;
}
else
{
maskChars = new MaskCharacter[fixed.size()];
fixed.toArray(maskChars);
}
}
/**
* Returns the MaskCharacter at the specified location.
*/
private MaskCharacter getMaskCharacter(int index)
{
if (index >= maskChars.length)
{
return null;
}
return maskChars[index];
}
/**
* Returns true if the placeholder character matches aChar.
*/
private boolean isPlaceholder(int index, char aChar)
{
if (placeholderString != null && index < placeholderString.length()) return placeholderString.charAt(index) == aChar;
return (getPlaceholderCharacter() == aChar);
}
/**
* Returns true if the passed in character matches the mask at the
* specified location.
*/
private boolean isValidCharacter(int index, char aChar)
{
return getMaskCharacter(index).isValidCharacter(aChar);
}
/**
* Returns true if the character at the specified location is a literal,
* that is it can not be edited.
*/
private boolean isLiteral(int index)
{
return getMaskCharacter(index).isLiteral();
}
/**
* Returns the maximum length the text can be.
*/
private int getMaxLength()
{
return maskChars.length;
}
/**
* Returns the literal character at the specified location.
*/
private char getLiteral(int index)
{
return getMaskCharacter(index).getChar((char)0);
}
/**
* Returns the character to insert at the specified location based on
* the passed in character. This provides a way to map certain sets
* of characters to alternative values (lowercase to
* uppercase...).
*/
private char getCharacter(int index, char aChar)
{
return getMaskCharacter(index).getChar(aChar);
}
/**
* Removes the literal characters from the passed in string.
*/
private String stripLiteralChars(String string)
{
StringBuffer sb = null;
int last = 0;
for (int counter = 0, max = string.length(); counter < max; counter++)
{
if (isLiteral(counter))
{
if (sb == null)
{
sb = new StringBuffer();
if (counter > 0)
{
sb.append(string.substring(0, counter));
}
last = counter + 1;
}
else if (last != counter)
{
sb.append(string.substring(last, counter));
}
last = counter + 1;
}
}
if (sb == null)
{
// Assume the mask isn't all literals.
return string;
}
else if (last != string.length())
{
if (sb == null)
{
return string.substring(last);
}
sb.append(string.substring(last));
}
return sb.toString();
}
/**
* Subclassed to update the internal representation of the mask after
* the default read operation has completed.
*/
private void readObject(ObjectInputStream s) throws IOException, ClassNotFoundException
{
s.defaultReadObject();
try
{
updateInternalMask();
}
catch (ParseException pe)
{
// assert();
}
}
/**
* Returns true if the MaskFormatter allows invalid, or
* the offset is less than the max length and the character at
* <code>offset</code> is a literal.
*/
@Override
boolean isNavigatable(int offset)
{
if (!getAllowsInvalid())
{
return (offset < getMaxLength() && !isLiteral(offset));
}
return true;
}
/*
* Returns true if the operation described by <code>rh</code> will result in a legal edit. This may set the <code>value</code> field of <code>rh</code>. <p>
* This is overriden to return true for a partial match.
*/
@Override
boolean isValidEdit(ReplaceHolder rh)
{
if (!getAllowsInvalid())
{
String newString = getReplaceString(rh.offset, rh.length, rh.text);
try
{
rh.value = stringToValue(newString, false);
return true;
}
catch (ParseException pe)
{
return false;
}
}
return true;
}
/**
* This method does the following (assuming !getAllowsInvalid()):
* iterate over the max of the deleted region or the text length, for
* each character:
* <ol>
* <li>If it is valid (matches the mask at the particular position, or
* matches the literal character at the position), allow it
* <li>Else if the position identifies a literal character, add it. This
* allows for the user to paste in text that may/may not contain
* the literals. For example, in pasing in 5551212 into ###-####
* when the 1 is evaluated it is illegal (by the first test), but there
* is a literal at this position (-), so it is used. NOTE: This has
* a problem that you can't tell (without looking ahead) if you should
* eat literals in the text. For example, if you paste '555' into
* #5##, should it result in '5555' or '555 '? The current code will
* result in the latter, which feels a little better as selecting
* text than pasting will always result in the same thing.
* <li>Else if at the end of the inserted text, the replace the item with
* the placeholder
* <li>Otherwise the insert is bogus and false is returned.
* </ol>
*/
@Override
boolean canReplace(ReplaceHolder rh)
{
// This method is rather long, but much of the burden is in
// maintaining a String and swapping to a StringBuffer only if
// absolutely necessary.
if (!getAllowsInvalid())
{
StringBuffer replace = null;
String text = rh.text;
int tl = (text != null) ? text.length() : 0;
if (tl == 0 && rh.length == 1 && getFormattedTextField().getSelectionStart() != rh.offset)
{
// Backspace, adjust to actually delete next non-literal.
while (rh.offset > 0 && isLiteral(rh.offset))
{
rh.offset--;
}
}
int max = Math.min(getMaxLength() - rh.offset, Math.max(tl, rh.length));
for (int counter = 0, textIndex = 0; counter < max; counter++)
{
if (textIndex < tl && isValidCharacter(rh.offset + counter, text.charAt(textIndex)))
{
char aChar = text.charAt(textIndex);
if (aChar != getCharacter(rh.offset + counter, aChar))
{
if (replace == null)
{
replace = new StringBuffer();
if (textIndex > 0)
{
replace.append(text.substring(0, textIndex));
}
}
}
if (replace != null)
{
replace.append(getCharacter(rh.offset + counter, aChar));
}
textIndex++;
}
else if (isLiteral(rh.offset + counter))
{
if (replace != null)
{
replace.append(getLiteral(rh.offset + counter));
if (textIndex < tl)
{
max = Math.min(max + 1, getMaxLength() - rh.offset);
}
}
else if (textIndex > 0)
{
replace = new StringBuffer(max);
replace.append(text.substring(0, textIndex));
replace.append(getLiteral(rh.offset + counter));
if (textIndex < tl)
{
// Evaluate the character in text again.
max = Math.min(max + 1, getMaxLength() - rh.offset);
}
else if (rh.cursorPosition == -1)
{
rh.cursorPosition = rh.offset + counter;
}
}
else
{
rh.offset++;
rh.length--;
counter--;
max--;
}
}
else if (textIndex >= tl)
{
// placeholder
if (replace == null)
{
replace = new StringBuffer();
if (text != null)
{
replace.append(text);
}
}
replace.append(getPlaceholderCharacter(rh.offset + counter));
if (tl > 0 && rh.cursorPosition == -1)
{
rh.cursorPosition = rh.offset + counter;
}
}
else
{
// Bogus character.
return false;
}
}
if (replace != null)
{
rh.text = replace.toString();
}
else if (text != null && rh.offset + tl > getMaxLength())
{
rh.text = text.substring(0, getMaxLength() - rh.offset);
}
if (getOverwriteMode() && rh.text != null)
{
rh.length = rh.text.length();
}
}
return super.canReplace(rh);
}
public String parse(String input) throws ParseException
{
if (input == null || input.length() == 0) return input;
if (input.equals(getPlaceholder())) return null;
if (input.equals(valueToString(null))) return null;
StringBuilder result = new StringBuilder();
for (int i = 0; i < input.length(); i++)
{
if (isValidCharacter(i, input.charAt(i)))
{
result.append(getCharacter(i, input.charAt(i)));
}
else throw new ParseException(input, i);
}
if (!getValueContainsLiteralCharacters())
{
return stripLiteralChars(result.toString());
}
return result.toString();
}
//
// Interal classes used to represent the mask.
//
private class MaskCharacter
{
/**
* Subclasses should override this returning true if the instance
* represents a literal character. The default implementation
* returns false.
*/
public boolean isLiteral()
{
return false;
}
/**
* Returns true if <code>aChar</code> is a valid reprensentation of
* the receiver. The default implementation returns true if the
* receiver represents a literal character and <code>getChar</code>
* == aChar. Otherwise, this will return true is <code>aChar</code>
* is contained in the valid characters and not contained
* in the invalid characters.
*/
public boolean isValidCharacter(char aChar)
{
if (isLiteral())
{
return (getChar(aChar) == aChar);
}
aChar = getChar(aChar);
String filter = getValidCharacters();
if (filter != null && filter.indexOf(aChar) == -1)
{
return false;
}
filter = getInvalidCharacters();
if (filter != null && filter.indexOf(aChar) != -1)
{
return false;
}
return true;
}
/**
* Returns the character to insert for <code>aChar</code>. The
* default implementation returns <code>aChar</code>. Subclasses
* that wish to do some sort of mapping, perhaps lower case to upper
* case should override this and do the necessary mapping.
*/
public char getChar(char aChar)
{
return aChar;
}
/**
* Appends the necessary character in <code>formatting</code> at
* <code>index</code> to <code>buff</code>.
*/
public void append(StringBuffer buff, String formatting, int[] index, String placeholder) throws ParseException
{
boolean inString = index[0] < formatting.length();
char aChar = inString ? formatting.charAt(index[0]) : 0;
if (isLiteral())
{
buff.append(getChar(aChar));
if (getValueContainsLiteralCharacters())
{
if (inString && aChar != getChar(aChar))
{
throw new ParseException("Invalid character: " + aChar, index[0]);
}
index[0] = index[0] + 1;
}
else if (formatting.length() == 0) index[0] = index[0] + 1;
}
else if (index[0] >= formatting.length())
{
if (placeholder != null && index[0] < placeholder.length())
{
buff.append(placeholder.charAt(index[0]));
}
else
{
buff.append(getPlaceholderCharacter());
}
index[0] = index[0] + 1;
}
else if (isValidCharacter(aChar))
{
buff.append(getChar(aChar));
index[0] = index[0] + 1;
}
else
{
throw new ParseException("Invalid character: " + aChar, index[0]);
}
}
}
/**
* Used to represent a fixed character in the mask.
*/
private class LiteralCharacter extends MaskCharacter
{
private final char fixedChar;
public LiteralCharacter(char fixedChar)
{
this.fixedChar = fixedChar;
}
@Override
public boolean isLiteral()
{
return true;
}
@Override
public char getChar(char aChar)
{
return fixedChar;
}
}
/**
* Represents a number, uses <code>Character.isDigit</code>.
*/
private class DigitMaskCharacter extends MaskCharacter
{
@Override
public boolean isValidCharacter(char aChar)
{
return (Character.isDigit(aChar) && super.isValidCharacter(aChar));
}
}
/**
* Represents a character, lower case letters are mapped to upper case
* using <code>Character.toUpperCase</code>.
*/
private class UpperCaseCharacter extends MaskCharacter
{
@Override
public boolean isValidCharacter(char aChar)
{
return (Character.isLetter(aChar) && super.isValidCharacter(aChar));
}
@Override
public char getChar(char aChar)
{
return Character.toUpperCase(aChar);
}
}
/**
* Represents a character, upper case letters are mapped to lower case
* using <code>Character.toLowerCase</code>.
*/
private class LowerCaseCharacter extends MaskCharacter
{
@Override
public boolean isValidCharacter(char aChar)
{
return (Character.isLetter(aChar) && super.isValidCharacter(aChar));
}
@Override
public char getChar(char aChar)
{
return Character.toLowerCase(aChar);
}
}
/**
* Represents either a character or digit, uses
* <code>Character.isLetterOrDigit</code>.
*/
private class AlphaNumericCharacter extends MaskCharacter
{
@Override
public boolean isValidCharacter(char aChar)
{
return (Character.isLetterOrDigit(aChar) && super.isValidCharacter(aChar));
}
}
/**
* Represents a letter, uses <code>Character.isLetter</code>.
*/
private class CharCharacter extends MaskCharacter
{
@Override
public boolean isValidCharacter(char aChar)
{
return (Character.isLetter(aChar) && super.isValidCharacter(aChar));
}
}
/**
* Represents a hex character, 0-9a-fA-F. a-f is mapped to A-F
*/
private class HexCharacter extends MaskCharacter
{
@Override
public boolean isValidCharacter(char aChar)
{
return ((aChar == '0' || aChar == '1' || aChar == '2' || aChar == '3' || aChar == '4' || aChar == '5' || aChar == '6' || aChar == '7' ||
aChar == '8' || aChar == '9' || aChar == 'a' || aChar == 'A' || aChar == 'b' || aChar == 'B' || aChar == 'c' || aChar == 'C' || aChar == 'd' ||
aChar == 'D' || aChar == 'e' || aChar == 'E' || aChar == 'f' || aChar == 'F') && super.isValidCharacter(aChar));
}
@Override
public char getChar(char aChar)
{
if (Character.isDigit(aChar))
{
return aChar;
}
return Character.toUpperCase(aChar);
}
}
}