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| 55 | <H2><A NAME="SECTION0014120000000000000000"></A><A NAME="formatter-impls"></A> |
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| 57 | 12.1.2 Formatter Implementations |
| 58 | </H2> |
| 59 | |
| 60 | <P> |
| 61 | Two implementations of formatter objects are provided by this module. |
| 62 | Most applications may use one of these classes without modification or |
| 63 | subclassing. |
| 64 | |
| 65 | <P> |
| 66 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> |
| 67 | <td><nobr><b><span class="typelabel">class</span> <tt id='l2h-3810' xml:id='l2h-3810' class="class">NullFormatter</tt></b>(</nobr></td> |
| 68 | <td><var></var><big>[</big><var>writer</var><big>]</big><var></var>)</td></tr></table></dt> |
| 69 | <dd> |
| 70 | A formatter which does nothing. If <var>writer</var> is omitted, a |
| 71 | <tt class="class">NullWriter</tt> instance is created. No methods of the writer are |
| 72 | called by <tt class="class">NullFormatter</tt> instances. Implementations should |
| 73 | inherit from this class if implementing a writer interface but don't |
| 74 | need to inherit any implementation. |
| 75 | </dl> |
| 76 | |
| 77 | <P> |
| 78 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> |
| 79 | <td><nobr><b><span class="typelabel">class</span> <tt id='l2h-3811' xml:id='l2h-3811' class="class">AbstractFormatter</tt></b>(</nobr></td> |
| 80 | <td><var>writer</var>)</td></tr></table></dt> |
| 81 | <dd> |
| 82 | The standard formatter. This implementation has demonstrated wide |
| 83 | applicability to many writers, and may be used directly in most |
| 84 | circumstances. It has been used to implement a full-featured |
| 85 | World Wide Web browser. |
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