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⏎ com/sun/mail/util/logging/CompactFormatter.java
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2013-2017 Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2013-2017 Jason Mehrens. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://oss.oracle.com/licenses/CDDL+GPL-1.1
* or LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.mail.util.logging;
import java.util.*;
import java.util.logging.LogRecord;
/**
* A plain text formatter that can produce fixed width output. By default this
* formatter will produce output no greater than 160 characters wide plus the
* separator and newline characters. Only specified fields support an
* {@linkplain #toAlternate(java.lang.String) alternate} fixed width format.
* <p>
* By default each <tt>CompactFormatter</tt> is initialized using the following
* LogManager configuration properties where
* <tt><formatter-name></tt> refers to the fully qualified class name or
* the fully qualified derived class name of the formatter. If properties are
* not defined, or contain invalid values, then the specified default values are
* used.
* <ul>
* <li><formatter-name>.format - the {@linkplain java.util.Formatter
* format} string used to transform the output. The format string can be
* used to fix the output size. (defaults to <tt>%7$#.160s%n</tt>)</li>
* </ul>
*
* @author Jason Mehrens
* @since JavaMail 1.5.2
*/
public class CompactFormatter extends java.util.logging.Formatter {
/**
* Load any declared classes to workaround GLASSFISH-21258.
*/
static {
loadDeclaredClasses();
}
/**
* Used to load declared classes encase class loader doesn't allow loading
* during JVM termination. This method is used with unit testing.
*
* @return an array of classes never null.
*/
private static Class<?>[] loadDeclaredClasses() {
return new Class<?>[]{Alternate.class};
}
/**
* Holds the java.util.Formatter pattern.
*/
private final String fmt;
/**
* Creates an instance with a default format pattern.
*/
public CompactFormatter() {
String p = getClass().getName();
this.fmt = initFormat(p);
}
/**
* Creates an instance with the given format pattern.
*
* @param format the {@linkplain java.util.Formatter pattern} or null to use
* the LogManager default. The arguments are described in the
* {@linkplain #format(java.util.logging.LogRecord) format} method.
*/
public CompactFormatter(final String format) {
String p = getClass().getName();
this.fmt = format == null ? initFormat(p) : format;
}
/**
* Format the given log record and returns the formatted string. The
* {@linkplain java.util.Formatter#format(java.lang.String, java.lang.Object...)
* java.util} argument indexes are assigned to the following properties:
*
* <ol start='0'>
* <li>{@code format} - the {@linkplain java.util.Formatter
* java.util.Formatter} format string specified in the
* <formatter-name>.format property or the format that was given when
* this formatter was created.</li>
* <li>{@code date} - if the log record supports nanoseconds then a
* ZonedDateTime object representing the event time of the log record in the
* system time zone. Otherwise, a {@linkplain Date} object representing
* {@linkplain LogRecord#getMillis event time} of the log record.</li>
* <li>{@code source} - a string representing the caller, if available;
* otherwise, the logger's name.</li>
* <li>{@code logger} - the logger's
* {@linkplain Class#getSimpleName() simple}
* {@linkplain LogRecord#getLoggerName() name}.</li>
* <li>{@code level} - the
* {@linkplain java.util.logging.Level#getLocalizedName log level}.</li>
* <li>{@code message} - the formatted log message returned from the
* {@linkplain #formatMessage(LogRecord)} method.</li>
* <li>{@code thrown} - a string representing the
* {@linkplain LogRecord#getThrown throwable} associated with the log record
* and a relevant stack trace element if available; otherwise, an empty
* string is used.</li>
* <li>{@code message|thrown} The message and the thrown properties joined
* as one parameter. This parameter supports
* {@linkplain #toAlternate(java.lang.String) alternate} form.</li>
* <li>{@code thrown|message} The thrown and message properties joined as
* one parameter. This parameter supports
* {@linkplain #toAlternate(java.lang.String) alternate} form.</li>
* <li>{@code sequence} the
* {@linkplain LogRecord#getSequenceNumber() sequence number} if the given
* log record.</li>
* <li>{@code thread id} the {@linkplain LogRecord#getThreadID() thread id}
* of the given log record. By default this is formatted as a {@code long}
* by an unsigned conversion.</li>
* <li>{@code error} the throwable
* {@linkplain Class#getSimpleName() simple class name} and
* {@linkplain #formatError(LogRecord) error message} without any stack
* trace.</li>
* <li>{@code message|error} The message and error properties joined as one
* parameter. This parameter supports
* {@linkplain #toAlternate(java.lang.String) alternate} form.</li>
* <li>{@code error|message} The error and message properties joined as one
* parameter. This parameter supports
* {@linkplain #toAlternate(java.lang.String) alternate} form.</li>
* <li>{@code backtrace} only the
* {@linkplain #formatBackTrace(LogRecord) stack trace} of the given
* throwable.</li>
* <li>{@code bundlename} the resource bundle
* {@linkplain LogRecord#getResourceBundleName() name} of the given log
* record.</li>
* <li>{@code key} the {@linkplain LogRecord#getMessage() raw message}
* before localization or formatting.</li>
* </ol>
*
* <p>
* Some example formats:<br>
* <ul>
* <li>{@code com.sun.mail.util.logging.CompactFormatter.format=%7$#.160s%n}
* <p>
* This prints only 160 characters of the message|thrown ({@code 7$}) using
* the {@linkplain #toAlternate(java.lang.String) alternate} form. The
* separator is not included as part of the total width.
* <pre>
* Encoding failed.|NullPointerException: null String.getBytes(:913)
* </pre>
*
* <li>{@code com.sun.mail.util.logging.CompactFormatter.format=%7$#.20s%n}
* <p>
* This prints only 20 characters of the message|thrown ({@code 7$}) using
* the {@linkplain #toAlternate(java.lang.String) alternate} form. This will
* perform a weighted truncation of both the message and thrown properties
* of the log record. The separator is not included as part of the total
* width.
* <pre>
* Encoding|NullPointerE
* </pre>
*
* <li>{@code com.sun.mail.util.logging.CompactFormatter.format=%1$tc %2$s%n%4$s: %5$s%6$s%n}
* <p>
* This prints the timestamp ({@code 1$}) and the source ({@code 2$}) on the
* first line. The second line is the log level ({@code 4$}), log message
* ({@code 5$}), and the throwable with a relevant stack trace element
* ({@code 6$}) if one is available.
* <pre>
* Fri Nov 20 07:29:24 CST 2009 MyClass fatal
* SEVERE: Encoding failed.NullPointerException: null String.getBytes(:913)
* </pre>
*
* <li>{@code com.sun.mail.util.logging.CompactFormatter.format=%4$s: %12$#.160s%n}
* <p>
* This prints the log level ({@code 4$}) and only 160 characters of the
* message|error ({@code 12$}) using the alternate form.
* <pre>
* SEVERE: Unable to send notification.|SocketException: Permission denied: connect
* </pre>
*
* <li>{@code com.sun.mail.util.logging.CompactFormatter.format=[%9$d][%1$tT][%10$d][%2$s] %5$s%n%6$s%n}
* <p>
* This prints the sequence ({@code 9$}), event time ({@code 1$}) as 24 hour
* time, thread id ({@code 10$}), source ({@code 2$}), log message
* ({@code 5$}), and the throwable with back trace ({@code 6$}).
* <pre>
* [125][14:11:42][38][MyClass fatal] Unable to send notification.
* SocketException: Permission denied: connect SMTPTransport.openServer(:1949)
* </pre>
*
* </ul>
*
* @param record the log record to format.
* @return the formatted record.
* @throws NullPointerException if the given record is null.
*/
@Override
public String format(final LogRecord record) {
//LogRecord is mutable so define local vars.
ResourceBundle rb = record.getResourceBundle();
Locale l = rb == null ? null : rb.getLocale();
String msg = formatMessage(record);
String thrown = formatThrown(record);
String err = formatError(record);
Object[] params = {
formatZonedDateTime(record),
formatSource(record),
formatLoggerName(record),
formatLevel(record),
msg,
thrown,
new Alternate(msg, thrown),
new Alternate(thrown, msg),
record.getSequenceNumber(),
formatThreadID(record),
err,
new Alternate(msg, err),
new Alternate(err, msg),
formatBackTrace(record),
record.getResourceBundleName(),
record.getMessage()};
if (l == null) { //BUG ID 6282094
return String.format(fmt, params);
} else {
return String.format(l, fmt, params);
}
}
/**
* Formats message for the log record. This method removes any fully
* qualified throwable class names from the message.
*
* @param record the log record.
* @return the formatted message string.
*/
@Override
public String formatMessage(final LogRecord record) {
String msg = super.formatMessage(record);
msg = replaceClassName(msg, record.getThrown());
msg = replaceClassName(msg, record.getParameters());
return msg;
}
/**
* Formats the message from the thrown property of the log record. This
* method replaces fully qualified throwable class names from the message
* cause chain with simple class names.
*
* @param t the throwable to format or null.
* @return the empty string if null was given or the formatted message
* string from the throwable which may be null.
*/
public String formatMessage(final Throwable t) {
String r;
if (t != null) {
final Throwable apply = apply(t);
final String m = apply.getLocalizedMessage();
final String s = apply.toString();
final String sn = simpleClassName(apply.getClass());
if (!isNullOrSpaces(m)) {
if (s.contains(m)) {
if (s.startsWith(apply.getClass().getName())
|| s.startsWith(sn)) {
r = replaceClassName(m, t);
} else {
r = replaceClassName(simpleClassName(s), t);
}
} else {
r = replaceClassName(simpleClassName(s) + ": " + m, t);
}
} else {
r = replaceClassName(simpleClassName(s), t);
}
if (!r.contains(sn)) {
r = sn + ": " + r;
}
} else {
r = "";
}
return r;
}
/**
* Formats the level property of the given log record.
*
* @param record the record.
* @return the formatted logger name.
* @throws NullPointerException if the given record is null.
*/
public String formatLevel(final LogRecord record) {
return record.getLevel().getLocalizedName();
}
/**
* Formats the source from the given log record.
*
* @param record the record.
* @return the formatted source of the log record.
* @throws NullPointerException if the given record is null.
*/
public String formatSource(final LogRecord record) {
String source = record.getSourceClassName();
if (source != null) {
if (record.getSourceMethodName() != null) {
source = simpleClassName(source) + " "
+ record.getSourceMethodName();
} else {
source = simpleClassName(source);
}
} else {
source = simpleClassName(record.getLoggerName());
}
return source;
}
/**
* Formats the logger name property of the given log record.
*
* @param record the record.
* @return the formatted logger name.
* @throws NullPointerException if the given record is null.
*/
public String formatLoggerName(final LogRecord record) {
return simpleClassName(record.getLoggerName());
}
/**
* Formats the thread id property of the given log record. By default this
* is formatted as a {@code long} by an unsigned conversion.
*
* @param record the record.
* @return the formatted thread id as a number.
* @throws NullPointerException if the given record is null.
* @since JavaMail 1.5.4
*/
public Number formatThreadID(final LogRecord record) {
/**
* Thread.getID is defined as long and LogRecord.getThreadID is defined
* as int. Convert to unsigned as a means to better map the two types of
* thread identifiers.
*/
return (((long) record.getThreadID()) & 0xffffffffL);
}
/**
* Formats the thrown property of a LogRecord. The returned string will
* contain a throwable message with a back trace.
*
* @param record the record.
* @return empty string if nothing was thrown or formatted string.
* @throws NullPointerException if the given record is null.
* @see #apply(java.lang.Throwable)
* @see #formatBackTrace(java.util.logging.LogRecord)
*/
public String formatThrown(final LogRecord record) {
String msg;
final Throwable t = record.getThrown();
if (t != null) {
String site = formatBackTrace(record);
msg = formatMessage(t) + (isNullOrSpaces(site) ? "" : ' ' + site);
} else {
msg = "";
}
return msg;
}
/**
* Formats the thrown property of a LogRecord as an error message. The
* returned string will not contain a back trace.
*
* @param record the record.
* @return empty string if nothing was thrown or formatted string.
* @throws NullPointerException if the given record is null.
* @see Throwable#toString()
* @see #apply(java.lang.Throwable)
* @see #formatMessage(java.lang.Throwable)
* @since JavaMail 1.5.4
*/
public String formatError(final LogRecord record) {
return formatMessage(record.getThrown());
}
/**
* Formats the back trace for the given log record.
*
* @param record the log record to format.
* @return the formatted back trace.
* @throws NullPointerException if the given record is null.
* @see #apply(java.lang.Throwable)
* @see #formatThrown(java.util.logging.LogRecord)
* @see #ignore(java.lang.StackTraceElement)
*/
public String formatBackTrace(final LogRecord record) {
String site = "";
final Throwable t = record.getThrown();
if (t != null) {
final Throwable root = apply(t);
StackTraceElement[] trace = root.getStackTrace();
site = findAndFormat(trace);
if (isNullOrSpaces(site)) {
int limit = 0;
for (Throwable c = t; c != null; c = c.getCause()) {
StackTraceElement[] ste = c.getStackTrace();
site = findAndFormat(ste);
if (!isNullOrSpaces(site)) {
break;
} else {
if (trace.length == 0) {
trace = ste;
}
}
//Deal with excessive cause chains
//and cyclic throwables.
if (++limit == (1 << 16)) {
break; //Give up.
}
}
//Punt.
if (isNullOrSpaces(site) && trace.length != 0) {
site = formatStackTraceElement(trace[0]);
}
}
}
return site;
}
/**
* Finds and formats the first stack frame of interest.
*
* @param trace the fill stack to examine.
* @return a String that best describes the call site.
* @throws NullPointerException if stack trace element array is null.
*/
private String findAndFormat(final StackTraceElement[] trace) {
String site = "";
for (StackTraceElement s : trace) {
if (!ignore(s)) {
site = formatStackTraceElement(s);
break;
}
}
//Check if all code was compiled with no debugging info.
if (isNullOrSpaces(site)) {
for (StackTraceElement s : trace) {
if (!defaultIgnore(s)) {
site = formatStackTraceElement(s);
break;
}
}
}
return site;
}
/**
* Formats a stack trace element into a simple call site.
*
* @param s the stack trace element to format.
* @return the formatted stack trace element.
* @throws NullPointerException if stack trace element is null.
* @see #formatThrown(java.util.logging.LogRecord)
*/
private String formatStackTraceElement(final StackTraceElement s) {
String v = simpleClassName(s.getClassName());
String result;
if (v != null) {
result = s.toString().replace(s.getClassName(), v);
} else {
result = s.toString();
}
//If the class name contains the simple file name then remove file name.
v = simpleFileName(s.getFileName());
if (v != null && result.startsWith(v)) {
result = result.replace(s.getFileName(), "");
}
return result;
}
/**
* Chooses a single throwable from the cause chain that will be formatted.
* This implementation chooses the throwable that best describes the chain.
* Subclasses can override this method to choose an alternate throwable for
* formatting.
*
* @param t the throwable from the log record.
* @return the chosen throwable or null only if the given argument is null.
* @see #formatThrown(java.util.logging.LogRecord)
*/
protected Throwable apply(final Throwable t) {
return SeverityComparator.getInstance().apply(t);
}
/**
* Determines if a stack frame should be ignored as the cause of an error.
*
* @param s the stack trace element.
* @return true if this frame should be ignored.
* @see #formatThrown(java.util.logging.LogRecord)
*/
protected boolean ignore(final StackTraceElement s) {
return isUnknown(s) || defaultIgnore(s);
}
/**
* Defines the alternate format. This implementation removes all control
* characters from the given string.
*
* @param s any string or null.
* @return null if the argument was null otherwise, an alternate string.
*/
protected String toAlternate(final String s) {
return s != null ? s.replaceAll("[\\x00-\\x1F\\x7F]+", "") : null;
}
/**
* Gets the zoned date time from the given log record.
*
* @param record the current log record.
* @return a zoned date time or a legacy date object.
* @throws NullPointerException if the given record is null.
* @since JavaMail 1.5.6
*/
private Comparable<?> formatZonedDateTime(final LogRecord record) {
Comparable<?> zdt = LogManagerProperties.getZonedDateTime(record);
if (zdt == null) {
zdt = new java.util.Date(record.getMillis());
}
return zdt;
}
/**
* Determines if a stack frame should be ignored as the cause of an error.
* This does not check for unknown line numbers because code can be compiled
* without debugging info.
*
* @param s the stack trace element.
* @return true if this frame should be ignored.
*/
private boolean defaultIgnore(final StackTraceElement s) {
return isSynthetic(s) || isStaticUtility(s) || isReflection(s);
}
/**
* Determines if a stack frame is for a static utility class.
*
* @param s the stack trace element.
* @return true if this frame should be ignored.
*/
private boolean isStaticUtility(final StackTraceElement s) {
try {
return LogManagerProperties.isStaticUtilityClass(s.getClassName());
} catch (RuntimeException ignore) {
} catch (Exception | LinkageError ignore) {
}
final String cn = s.getClassName();
return (cn.endsWith("s") && !cn.endsWith("es"))
|| cn.contains("Util") || cn.endsWith("Throwables");
}
/**
* Determines if a stack trace element is for a synthetic method.
*
* @param s the stack trace element.
* @return true if synthetic.
* @throws NullPointerException if stack trace element is null.
*/
private boolean isSynthetic(final StackTraceElement s) {
return s.getMethodName().indexOf('$') > -1;
}
/**
* Determines if a stack trace element has an unknown line number or a
* native line number.
*
* @param s the stack trace element.
* @return true if the line number is unknown.
* @throws NullPointerException if stack trace element is null.
*/
private boolean isUnknown(final StackTraceElement s) {
return s.getLineNumber() < 0;
}
/**
* Determines if a stack trace element represents a reflection frame.
*
* @param s the stack trace element.
* @return true if the line number is unknown.
* @throws NullPointerException if stack trace element is null.
*/
private boolean isReflection(final StackTraceElement s) {
try {
return LogManagerProperties.isReflectionClass(s.getClassName());
} catch (RuntimeException ignore) {
} catch (Exception | LinkageError ignore) {
}
return s.getClassName().startsWith("java.lang.reflect.")
|| s.getClassName().startsWith("sun.reflect.");
}
/**
* Creates the format pattern for this formatter.
*
* @param p the class name prefix.
* @return the java.util.Formatter format string.
* @throws NullPointerException if the given class name is null.
*/
private String initFormat(final String p) {
String v = LogManagerProperties.fromLogManager(p.concat(".format"));
if (isNullOrSpaces(v)) {
v = "%7$#.160s%n"; //160 chars split between message and thrown.
}
return v;
}
/**
* Searches the given message for all instances fully qualified class name
* with simple class name based off of the types contained in the given
* parameter array.
*
* @param msg the message.
* @param t the throwable cause chain to search or null.
* @return the modified message string.
*/
private static String replaceClassName(String msg, Throwable t) {
if (!isNullOrSpaces(msg)) {
int limit = 0;
for (Throwable c = t; c != null; c = c.getCause()) {
final Class<?> k = c.getClass();
msg = msg.replace(k.getName(), simpleClassName(k));
//Deal with excessive cause chains and cyclic throwables.
if (++limit == (1 << 16)) {
break; //Give up.
}
}
}
return msg;
}
/**
* Searches the given message for all instances fully qualified class name
* with simple class name based off of the types contained in the given
* parameter array.
*
* @param msg the message or null.
* @param p the parameter array or null.
* @return the modified message string.
*/
private static String replaceClassName(String msg, Object[] p) {
if (!isNullOrSpaces(msg) && p != null) {
for (Object o : p) {
if (o != null) {
final Class<?> k = o.getClass();
msg = msg.replace(k.getName(), simpleClassName(k));
}
}
}
return msg;
}
/**
* Gets the simple class name from the given class. This is a workaround for
* BUG ID JDK-8057919.
*
* @param k the class object.
* @return the simple class name or null.
* @since JavaMail 1.5.3
*/
private static String simpleClassName(final Class<?> k) {
try {
return k.getSimpleName();
} catch (final InternalError JDK8057919) {
}
return simpleClassName(k.getName());
}
/**
* Converts a fully qualified class name to a simple class name. If the
* leading part of the given string is not a legal class name then the given
* string is returned.
*
* @param name the fully qualified class name prefix or null.
* @return the simple class name or given input.
*/
private static String simpleClassName(String name) {
if (name != null) {
int cursor = 0;
int sign = -1;
int dot = -1;
for (int c, prev = dot; cursor < name.length();
cursor += Character.charCount(c)) {
c = name.codePointAt(cursor);
if (!Character.isJavaIdentifierPart(c)) {
if (c == ((int) '.')) {
if ((dot + 1) != cursor && (dot + 1) != sign) {
prev = dot;
dot = cursor;
} else {
return name;
}
} else {
if ((dot + 1) == cursor) {
dot = prev;
}
break;
}
} else {
if (c == ((int) '$')) {
sign = cursor;
}
}
}
if (dot > -1 && ++dot < cursor && ++sign < cursor) {
name = name.substring(sign > dot ? sign : dot);
}
}
return name;
}
/**
* Converts a file name with an extension to a file name without an
* extension.
*
* @param name the full file name or null.
* @return the simple file name or null.
*/
private static String simpleFileName(String name) {
if (name != null) {
final int index = name.lastIndexOf('.');
name = index > -1 ? name.substring(0, index) : name;
}
return name;
}
/**
* Determines is the given string is null or spaces.
*
* @param s the string or null.
* @return true if null or spaces.
*/
private static boolean isNullOrSpaces(final String s) {
return s == null || s.trim().length() == 0;
}
/**
* Used to format two arguments as fixed length message.
*/
private class Alternate implements java.util.Formattable {
/**
* The left side of the output.
*/
private final String left;
/**
* The right side of the output.
*/
private final String right;
/**
* Creates an alternate output.
*
* @param left the left side or null.
* @param right the right side or null.
*/
Alternate(final String left, final String right) {
this.left = String.valueOf(left);
this.right = String.valueOf(right);
}
@SuppressWarnings("override") //JDK-6954234
public void formatTo(java.util.Formatter formatter, int flags,
int width, int precision) {
String l = left;
String r = right;
if ((flags & java.util.FormattableFlags.UPPERCASE)
== java.util.FormattableFlags.UPPERCASE) {
l = l.toUpperCase(formatter.locale());
r = r.toUpperCase(formatter.locale());
}
if ((flags & java.util.FormattableFlags.ALTERNATE)
== java.util.FormattableFlags.ALTERNATE) {
l = toAlternate(l);
r = toAlternate(r);
}
if (precision <= 0) {
precision = Integer.MAX_VALUE;
}
int fence = Math.min(l.length(), precision);
if (fence > (precision >> 1)) {
fence = Math.max(fence - r.length(), fence >> 1);
}
if (fence > 0) {
if (fence > l.length()
&& Character.isHighSurrogate(l.charAt(fence - 1))) {
--fence;
}
l = l.substring(0, fence);
}
r = r.substring(0, Math.min(precision - fence, r.length()));
if (width > 0) {
final int half = width >> 1;
if (l.length() < half) {
l = pad(flags, l, half);
}
if (r.length() < half) {
r = pad(flags, r, half);
}
}
Object[] empty = Collections.emptySet().toArray();
formatter.format(l, empty);
if (l.length() != 0 && r.length() != 0) {
formatter.format("|", empty);
}
formatter.format(r, empty);
}
/**
* Pad the given input string.
*
* @param flags the formatter flags.
* @param s the string to pad.
* @param length the final string length.
* @return the padded string.
*/
private String pad(int flags, String s, int length) {
final int padding = length - s.length();
final StringBuilder b = new StringBuilder(length);
if ((flags & java.util.FormattableFlags.LEFT_JUSTIFY)
== java.util.FormattableFlags.LEFT_JUSTIFY) {
for (int i = 0; i < padding; ++i) {
b.append('\u0020');
}
b.append(s);
} else {
b.append(s);
for (int i = 0; i < padding; ++i) {
b.append('\u0020');
}
}
return b.toString();
}
}
}
⏎ com/sun/mail/util/logging/CompactFormatter.java
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