java.util.logging
Class Formatter
A Formatter supports handlers by localizing
message texts and by subsituting parameter values for their
placeholders.
clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait |
Formatter
protected Formatter()
Constructs a new Formatter.
format
public abstract String format(LogRecord record)
Formats a LogRecord into a string. Usually called by handlers
which need a string for a log record, for example to append
a record to a log file or to transmit a record over the network.
record - the log record for which a string form is requested.
formatMessage
public String formatMessage(LogRecord record)
Formats the message part of a log record.
First, the Formatter localizes the record message to the
default locale by looking up the message in the record's
localization resource bundle. If this step fails because there
is no resource bundle associated with the record, or because the
record message is not a key in the bundle, the raw message is
used instead.
Second, the Formatter substitutes appropriate strings for
the message parameters. If the record returns a non-empty
array for
getParameters() and the localized
message string contains the character sequence "{0", the
formatter uses
java.text.MessageFormat to format
the message. Otherwise, no parameter substitution is performed.
record - the log record to be localized and formatted.
- the localized message text where parameters have been
substituted by suitable strings.
getHead
public String getHead(Handler handler)
Returns a string that handlers are supposed to emit before
the first log record. The base implementation returns an
empty string, but subclasses such as
XMLFormatter
override this method in order to provide a suitable header.
handler - the handler which will prepend the returned
string in front of the first log record. This method
may inspect certain properties of the handler, for
example its encoding, in order to construct the header.
getTail
public String getTail(Handler handler)
Returns a string that handlers are supposed to emit after
the last log record. The base implementation returns an
empty string, but subclasses such as
XMLFormatter
override this method in order to provide a suitable tail.
handler - the handler which will append the returned
string after the last log record. This method
may inspect certain properties of the handler
in order to construct the tail.
Formatter.java --
A class for formatting log messages by localizing message texts
and performing substitution of parameters
Copyright (C) 2002, 2004 Free Software Foundation, Inc.
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