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aQute.libg.sed.ReplacerAdapter Maven / Gradle / Ivy
A command line utility and Ant plugin to wrap, build, or examine bundles.
package aQute.libg.sed;
import java.io.*;
import java.lang.reflect.*;
import java.net.*;
import java.text.*;
import java.util.*;
import java.util.regex.*;
import aQute.lib.collections.*;
import aQute.lib.io.*;
import aQute.libg.glob.*;
import aQute.libg.reporter.*;
import aQute.service.reporter.*;
/**
* Provide a macro Domain. This Domain can replace variables in strings based on
* a properties and a domain. The domain can implement functions that start with
* a "_" and take args[], the names of these functions are available as
* functions in the macro Domain (without the _). Macros can nest to any depth
* but may not contain loops. Add POSIX macros: ${#parameter} String length.
* ${parameter%word} Remove smallest suffix pattern. ${parameter%%word} Remove
* largest suffix pattern. ${parameter#word} Remove smallest prefix pattern.
* ${parameter##word} Remove largest prefix pattern.
*/
public class ReplacerAdapter extends ReporterAdapter implements Replacer {
static final Random random = new Random();
static Pattern WILDCARD = Pattern.compile("[*?|[\\\\]\\(\\)]");
Domain domain;
List targets = new ArrayList();
boolean flattening;
File base = new File(System.getProperty("user.dir"));
Reporter reporter = this;
public ReplacerAdapter(Domain domain) {
this.domain = domain;
}
public ReplacerAdapter(final Map domain) {
this(new Domain() {
public Map getMap() {
return domain;
}
public Domain getParent() {
return null;
}
});
}
public ReplacerAdapter target(Object target) {
assert target != null;
targets.add(target);
return this;
}
public ReplacerAdapter target(File base) {
this.base = base;
return this;
}
public String process(String line, Domain source) {
return process(line, new Link(source, null, line));
}
String process(String line, Link link) {
StringBuilder sb = new StringBuilder();
process(line, 0, '\u0000', '\u0000', sb, link);
return sb.toString();
}
int process(CharSequence org, int index, char begin, char end, StringBuilder result, Link link) {
StringBuilder line = new StringBuilder(org);
int nesting = 1;
StringBuilder variable = new StringBuilder();
outer: while (index < line.length()) {
char c1 = line.charAt(index++);
if (c1 == end) {
if (--nesting == 0) {
result.append(replace(variable.toString(), link));
return index;
}
} else if (c1 == begin)
nesting++;
else if (c1 == '\\' && index < line.length() - 1 && line.charAt(index) == '$') {
// remove the escape backslash and interpret the dollar
// as a
// literal
index++;
variable.append('$');
continue outer;
} else if (c1 == '$' && index < line.length() - 2) {
char c2 = line.charAt(index);
char terminator = getTerminator(c2);
if (terminator != 0) {
index = process(line, index + 1, c2, terminator, variable, link);
continue outer;
}
} else if (c1 == '.' && index < line.length() && line.charAt(index) == '/') {
// Found the sequence ./
if (index == 1 || Character.isWhitespace(line.charAt(index - 2))) {
// make sure it is preceded by whitespace or starts at begin
index++;
variable.append(base.getAbsolutePath());
variable.append('/');
continue outer;
}
}
variable.append(c1);
}
result.append(variable);
return index;
}
/**
* Traverses a string to find a macro. It can handle nested brackets.
*
* @param line
* The line with the macro
* @param index
* Points to the character after the '$'
* @return the end position
*/
public int findMacro(CharSequence line, int index) {
if (index >= line.length() || line.charAt(index) != '$')
return -1;
index++;
int nesting = 1;
char begin = line.charAt(index++);
char end = getTerminator(begin);
if (end == 0)
return -1;
while (index < line.length()) {
char c1 = line.charAt(index++);
if (c1 == end) {
if (--nesting == 0) {
return index;
}
} else if (c1 == begin)
nesting++;
else if (c1 == '\\' && index < line.length() - 1) {
index++;
} else if (c1 == '\'' || c1 == '"') {
string: while (index < line.length()) {
char c2 = line.charAt(index++);
switch (c2) {
case '"' :
case '\'' :
if (c2 == c1)
break string;
break;
case '\\' :
index++;
break;
}
}
}
}
return index;
}
public static char getTerminator(char c) {
switch (c) {
case '(' :
return ')';
case '[' :
return ']';
case '{' :
return '}';
case '<' :
return '>';
case '\u00ab' : // Guillemet double << >>
return '\u00bb';
case '\u2039' : // Guillemet single
return '\u203a';
}
return 0;
}
public String getProcessed(String key) {
return replace(key, null);
}
protected String replace(String key, Link link) {
if (link != null && link.contains(key))
return "${infinite:" + link.toString() + "}";
if (key != null) {
key = key.trim();
if (key.length() > 0) {
Domain source = domain;
String value = null;
if (key.indexOf(';') < 0) {
if (WILDCARD.matcher(key).find()) {
Glob ins = new Glob(key);
StringBuilder sb = new StringBuilder();
String del = "";
for (String k : getAllKeys()) {
if (ins.matcher(k).find()) {
String v = replace(k, new Link(source, link, key));
if (v != null) {
sb.append(del);
del = ",";
sb.append(v);
}
}
}
return sb.toString();
}
while (value == null && source != null) {
value = source.getMap().get(key);
if (value != null)
return process(value, new Link(source, link, key));
source = source.getParent();
}
}
value = doCommands(key, link);
if (value != null)
return process(value, new Link(source, link, key));
if (key != null && key.trim().length() > 0) {
value = System.getProperty(key);
if (value != null)
return value;
}
if (key.indexOf(';') >= 0) {
String parts[] = key.split(";");
if (parts.length > 1) {
if (parts.length >= 16) {
error("too many arguments for template: %s, max is 16", key);
}
String template = domain.getMap().get(parts[0]);
if (template != null) {
final Domain old = domain;
try {
final Map args = new HashMap();
for (int i = 0; i < 16; i++) {
args.put("" + i, i < parts.length ? parts[i] : "null");
}
domain = new Domain() {
public Map getMap() {
return args;
}
public Domain getParent() {
return old;
}
};
ExtList args0 = new ExtList(parts);
args0.remove(0);
args.put("#", args0.join());
value = process(template, new Link(domain, link, key));
if (value != null)
return value;
}
finally {
domain = old;
}
}
}
}
if (!flattening && !key.equals("@"))
reporter.warning("No translation found for macro: " + key);
} else {
reporter.warning("Found empty macro key");
}
} else {
reporter.warning("Found null macro key");
}
return "${" + key + "}";
}
private List getAllKeys() {
List l = new ArrayList();
Domain source = domain;
do {
l.addAll(source.getMap().keySet());
source = source.getParent();
} while (source != null);
Collections.sort(l);
return l;
}
/**
* Parse the key as a command. A command consist of parameters separated by
* ':'.
*
* @param key
* @return
*/
static Pattern commands = Pattern.compile("(?= 0)
args[i] = args[i].replaceAll("\\\\;", ";");
if (args[0].startsWith("^")) {
String varname = args[0].substring(1).trim();
Domain parent = source.start.getParent();
if (parent != null)
return parent.getMap().get(varname);
return null;
}
Domain rover = domain;
while (rover != null) {
String result = doCommand(rover, args[0], args);
if (result != null)
return result;
rover = rover.getParent();
}
for (Object target : targets) {
String result = doCommand(target, args[0], args);
if (result != null)
return result;
}
return doCommand(this, args[0], args);
}
private String doCommand(Object target, String method, String[] args) {
if (target == null)
; // System.err.println("Huh? Target should never be null " +
// domain);
else {
String cname = "_" + method.replaceAll("-", "_");
try {
Method m = target.getClass().getMethod(cname, new Class[] {
String[].class
});
return "" + m.invoke(target, new Object[] {
args
});
}
catch (NoSuchMethodException e) {
// Ignore
}
catch (InvocationTargetException e) {
if (e.getCause() instanceof IllegalArgumentException) {
reporter.error("%s, for cmd: %s, arguments; %s", e.getCause().getMessage(), method,
Arrays.toString(args));
} else {
reporter.warning("Exception in replace: " + e.getCause());
e.getCause().printStackTrace();
}
}
catch (Exception e) {
reporter.warning("Exception in replace: " + e + " method=" + method);
e.printStackTrace();
}
}
return null;
}
/**
* Return a unique list where the duplicates are removed.
*
* @param args
* @return
*/
static String _uniqHelp = "${uniq; ...}";
public String _uniq(String args[]) {
verifyCommand(args, _uniqHelp, null, 1, Integer.MAX_VALUE);
Set set = new LinkedHashSet();
for (int i = 1; i < args.length; i++) {
set.addAll(ExtList.from(args[i].trim()));
}
ExtList rsult = new ExtList();
rsult.addAll(set);
return rsult.join(",");
}
public String _pathseparator(String args[]) {
return File.pathSeparator;
}
public String _separator(String args[]) {
return File.separator;
}
public String _filter(String args[]) {
return filter(args, false);
}
public String _filterout(String args[]) {
return filter(args, true);
}
static String _filterHelp = "${%s;;}";
String filter(String[] args, boolean include) {
verifyCommand(args, String.format(_filterHelp, args[0]), null, 3, 3);
ExtList list = ExtList.from(args[1]);
Pattern pattern = Pattern.compile(args[2]);
for (Iterator i = list.iterator(); i.hasNext();) {
if (pattern.matcher(i.next()).matches() == include)
i.remove();
}
return list.join();
}
static String _sortHelp = "${sort;...}";
public String _sort(String args[]) {
verifyCommand(args, _sortHelp, null, 2, Integer.MAX_VALUE);
ExtList result = new ExtList();
for (int i = 1; i < args.length; i++) {
result.addAll(ExtList.from(args[i]));
}
Collections.sort(result);
return result.join();
}
static String _nsortHelp = "${nsort;...}";
public String _nsort(String args[]) {
verifyCommand(args, _nsortHelp, null, 2, Integer.MAX_VALUE);
ExtList result = new ExtList();
for (int i = 1; i < args.length; i++) {
result.addAll(ExtList.from(args[i]));
}
Collections.sort(result, new Comparator() {
public int compare(String a, String b) {
while (a.startsWith("0"))
a = a.substring(1);
while (b.startsWith("0"))
b = b.substring(1);
if (a.length() == b.length())
return a.compareTo(b);
else if (a.length() > b.length())
return 1;
else
return -1;
}
});
return result.join();
}
static String _joinHelp = "${join;...}";
public String _join(String args[]) {
verifyCommand(args, _joinHelp, null, 1, Integer.MAX_VALUE);
ExtList result = new ExtList();
for (int i = 1; i < args.length; i++) {
result.addAll(ExtList.from(args[i]));
}
return result.join();
}
static String _ifHelp = "${if;; [;] }";
public String _if(String args[]) {
verifyCommand(args, _ifHelp, null, 3, 4);
String condition = args[1].trim();
if (!condition.equalsIgnoreCase("false"))
if (condition.length() != 0)
return args[2];
if (args.length > 3)
return args[3];
return "";
}
public String _now(String args[]) {
return new Date().toString();
}
public final static String _fmodifiedHelp = "${fmodified;...}, return latest modification date";
public String _fmodified(String args[]) throws Exception {
verifyCommand(args, _fmodifiedHelp, null, 2, Integer.MAX_VALUE);
long time = 0;
Collection names = new ExtList();
for (int i = 1; i < args.length; i++) {
names.addAll(ExtList.from(args[i]));
}
for (String name : names) {
File f = new File(name);
if (f.exists() && f.lastModified() > time)
time = f.lastModified();
}
return "" + time;
}
public String _long2date(String args[]) {
try {
return new Date(Long.parseLong(args[1])).toString();
}
catch (Exception e) {
e.printStackTrace();
}
return "not a valid long";
}
public String _literal(String args[]) {
if (args.length != 2)
throw new RuntimeException("Need a value for the ${literal;} macro");
return "${" + args[1] + "}";
}
public String _def(String args[]) {
if (args.length != 2)
throw new RuntimeException("Need a value for the ${def;} macro");
String value = domain.getMap().get(args[1]);
if (value == null)
return "";
return value;
}
/**
* replace ; ; regex ; replace
*
* @param args
* @return
*/
public String _replace(String args[]) {
if (args.length != 4) {
reporter.warning("Invalid nr of arguments to replace " + Arrays.asList(args));
return null;
}
String list[] = args[1].split("\\s*,\\s*");
StringBuilder sb = new StringBuilder();
String del = "";
for (int i = 0; i < list.length; i++) {
String element = list[i].trim();
if (!element.equals("")) {
sb.append(del);
sb.append(element.replaceAll(args[2], args[3]));
del = ", ";
}
}
return sb.toString();
}
public String _warning(String args[]) {
for (int i = 1; i < args.length; i++) {
reporter.warning(process(args[i]));
}
return "";
}
public String _error(String args[]) {
for (int i = 1; i < args.length; i++) {
reporter.error(process(args[i]));
}
return "";
}
/**
* toclassname ; .class ( , .class ) *
*
* @param args
* @return
*/
static String _toclassnameHelp = "${classname;}, convert class paths to FQN class names ";
public String _toclassname(String args[]) {
verifyCommand(args, _toclassnameHelp, null, 2, 2);
Collection paths = ExtList.from(args[1]);
ExtList names = new ExtList(paths.size());
for (String path : paths) {
if (path.endsWith(".class")) {
String name = path.substring(0, path.length() - 6).replace('/', '.');
names.add(name);
} else if (path.endsWith(".java")) {
String name = path.substring(0, path.length() - 5).replace('/', '.');
names.add(name);
} else {
reporter.warning("in toclassname, %s, is not a class path because it does not end in .class", args[1]);
}
}
return names.join(",");
}
/**
* toclassname ; .class ( , .class ) *
*
* @param args
* @return
*/
static String _toclasspathHelp = "${toclasspath;[;boolean]}, convert a list of class names to paths";
public String _toclasspath(String args[]) {
verifyCommand(args, _toclasspathHelp, null, 2, 3);
boolean cl = true;
if (args.length > 2)
cl = Boolean.valueOf(args[2]);
ExtList names = ExtList.from(args[1]);
ExtList paths = new ExtList(names.size());
for (String name : names) {
String path = name.replace('.', '/') + (cl ? ".class" : "");
paths.add(path);
}
return paths.join(",");
}
public String _dir(String args[]) {
if (args.length < 2) {
reporter.warning("Need at least one file name for ${dir;...}");
return null;
}
String del = "";
StringBuilder sb = new StringBuilder();
for (int i = 1; i < args.length; i++) {
File f = IO.getFile(base, args[i]);
if (f.exists() && f.getParentFile().exists()) {
sb.append(del);
sb.append(f.getParentFile().getAbsolutePath());
del = ",";
}
}
return sb.toString();
}
public String _basename(String args[]) {
if (args.length < 2) {
reporter.warning("Need at least one file name for ${basename;...}");
return null;
}
String del = "";
StringBuilder sb = new StringBuilder();
for (int i = 1; i < args.length; i++) {
File f = IO.getFile(base, args[i]);
if (f.exists() && f.getParentFile().exists()) {
sb.append(del);
sb.append(f.getName());
del = ",";
}
}
return sb.toString();
}
public String _isfile(String args[]) {
if (args.length < 2) {
reporter.warning("Need at least one file name for ${isfile;...}");
return null;
}
boolean isfile = true;
for (int i = 1; i < args.length; i++) {
File f = new File(args[i]).getAbsoluteFile();
isfile &= f.isFile();
}
return isfile ? "true" : "false";
}
public String _isdir(String args[]) {
if (args.length < 2) {
reporter.warning("Need at least one file name for ${isdir;...}");
return null;
}
boolean isdir = true;
for (int i = 1; i < args.length; i++) {
File f = new File(args[i]).getAbsoluteFile();
isdir &= f.isDirectory();
}
return isdir ? "true" : "false";
}
public String _tstamp(String args[]) {
String format = "yyyyMMddHHmm";
long now = System.currentTimeMillis();
TimeZone tz = TimeZone.getTimeZone("UTC");
if (args.length > 1) {
format = args[1];
}
if (args.length > 2) {
tz = TimeZone.getTimeZone(args[2]);
}
if (args.length > 3) {
now = Long.parseLong(args[3]);
}
if (args.length > 4) {
reporter.warning("Too many arguments for tstamp: " + Arrays.toString(args));
}
SimpleDateFormat sdf = new SimpleDateFormat(format);
sdf.setTimeZone(tz);
return sdf.format(new Date(now));
}
/**
* Wildcard a directory. The lists can contain Instruction that are matched
* against the given directory ${lsr;;(;)*}
* ${lsa;;(;)*}
*
* @author aqute
*/
public String _lsr(String args[]) {
return ls(args, true);
}
public String _lsa(String args[]) {
return ls(args, false);
}
String ls(String args[], boolean relative) {
if (args.length < 2)
throw new IllegalArgumentException("the ${ls} macro must at least have a directory as parameter");
File dir = IO.getFile(base, args[1]);
if (!dir.isAbsolute())
throw new IllegalArgumentException("the ${ls} macro directory parameter is not absolute: " + dir);
if (!dir.exists())
throw new IllegalArgumentException("the ${ls} macro directory parameter does not exist: " + dir);
if (!dir.isDirectory())
throw new IllegalArgumentException(
"the ${ls} macro directory parameter points to a file instead of a directory: " + dir);
List files = new ArrayList(new SortedList(dir.listFiles()));
for (int i = 2; i < args.length; i++) {
Glob filters = new Glob(args[i]);
filters.select(files);
}
ExtList result = new ExtList();
for (File file : files)
result.add(relative ? file.getName() : file.getAbsolutePath());
return result.join(",");
}
public String _currenttime(String args[]) {
return Long.toString(System.currentTimeMillis());
}
/**
* System command. Execute a command and insert the result.
*
* @param args
* @param help
* @param patterns
* @param low
* @param high
*/
public String system_internal(boolean allowFail, String args[]) throws Exception {
verifyCommand(args, "${" + (allowFail ? "system-allow-fail" : "system")
+ ";[;]}, execute a system command", null, 2, 3);
String command = args[1];
String input = null;
if (args.length > 2) {
input = args[2];
}
Process process = Runtime.getRuntime().exec(command, null, base);
if (input != null) {
process.getOutputStream().write(input.getBytes("UTF-8"));
}
process.getOutputStream().close();
String s = IO.collect(process.getInputStream(), "UTF-8");
s += IO.collect(process.getErrorStream(), "UTF-8");
int exitValue = process.waitFor();
if (exitValue != 0)
return exitValue + "";
if (exitValue != 0) {
if (!allowFail) {
reporter.error("System command " + command + " failed with exit code " + exitValue);
} else {
reporter.warning("System command " + command + " failed with exit code " + exitValue + " (allowed)");
}
}
return s.trim();
}
public String _system(String args[]) throws Exception {
return system_internal(false, args);
}
public String _system_allow_fail(String args[]) throws Exception {
String result = "";
try {
result = system_internal(true, args);
}
catch (Throwable t) {
/* ignore */
}
return result;
}
public String _env(String args[]) {
verifyCommand(args, "${env;}, get the environmet variable", null, 2, 2);
try {
return System.getenv(args[1]);
}
catch (Throwable t) {
return null;
}
}
/**
* Get the contents of a file.
*
* @param in
* @return
* @throws IOException
*/
public String _cat(String args[]) throws IOException {
verifyCommand(args, "${cat;}, get the content of a file", null, 2, 2);
File f = IO.getFile(base, args[1]);
if (f.isFile()) {
return IO.collect(f);
} else if (f.isDirectory()) {
return Arrays.toString(f.list());
} else {
try {
URL url = new URL(args[1]);
return IO.collect(url, "UTF-8");
}
catch (MalformedURLException mfue) {
// Ignore here
}
return null;
}
}
public static void verifyCommand(String args[], String help, Pattern[] patterns, int low, int high) {
String message = "";
if (args.length > high) {
message = "too many arguments";
} else if (args.length < low) {
message = "too few arguments";
} else {
for (int i = 0; patterns != null && i < patterns.length && i < args.length; i++) {
if (patterns[i] != null) {
Matcher m = patterns[i].matcher(args[i]);
if (!m.matches())
message += String.format("Argument %s (%s) does not match %s%n", i, args[i],
patterns[i].pattern());
}
}
}
if (message.length() != 0) {
StringBuilder sb = new StringBuilder();
String del = "${";
for (String arg : args) {
sb.append(del);
sb.append(arg);
del = ";";
}
sb.append("}, is not understood. ");
sb.append(message);
throw new IllegalArgumentException(sb.toString());
}
}
// Helper class to track expansion of variables
// on the stack.
static class Link {
Link previous;
String key;
Domain start;
public Link(Domain start, Link previous, String key) {
this.previous = previous;
this.key = key;
this.start = start;
}
public boolean contains(String key) {
if (this.key.equals(key))
return true;
if (previous == null)
return false;
return previous.contains(key);
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder("[");
append(sb);
sb.append("]");
return sb.toString();
}
private void append(StringBuilder sb) {
if (previous != null) {
previous.append(sb);
sb.append(",");
}
sb.append(key);
}
}
/**
* Take all the properties and translate them to actual values. This method
* takes the set properties and traverse them over all entries, including
* the default properties for that properties. The values no longer contain
* macros.
*
* @return A new Properties with the flattened values
*/
public Map getFlattenedProperties() {
// Some macros only work in a lower Domain, so we
// do not report unknown macros while flattening
flattening = true;
try {
Map flattened = new HashMap();
Map source = domain.getMap();
for (String key : source.keySet()) {
if (!key.startsWith("_"))
if (key.startsWith("-"))
flattened.put(key, source.get(key));
else
flattened.put(key, process(source.get(key)));
}
return flattened;
}
finally {
flattening = false;
}
}
public final static String _fileHelp = "${file;...}, create correct OS dependent path";
public String _osfile(String args[]) {
verifyCommand(args, _fileHelp, null, 3, 3);
File base = new File(args[1]);
File f = IO.getFile(base, args[2]);
return f.getAbsolutePath();
}
public String _path(String args[]) {
ExtList list = new ExtList();
for (int i = 1; i < args.length; i++) {
list.addAll(ExtList.from(args[i]));
}
return list.join(File.pathSeparator);
}
public static Properties getParent(Properties p) {
try {
Field f = Properties.class.getDeclaredField("defaults");
f.setAccessible(true);
return (Properties) f.get(p);
}
catch (Exception e) {
Field[] fields = Properties.class.getFields();
System.err.println(Arrays.toString(fields));
return null;
}
}
public String process(String line) {
return process(line, domain);
}
/**
* Generate a random string, which is guaranteed to be a valid Java
* identifier (first character is an ASCII letter, subsequent characters are
* ASCII letters or numbers). Takes an optional parameter for the length of
* string to generate; default is 8 characters.
*/
public String _random(String[] args) {
int numchars = 8;
if (args.length > 1) {
try {
numchars = Integer.parseInt(args[1]);
}
catch (NumberFormatException e) {
throw new IllegalArgumentException("Invalid character count parameter in ${random} macro.");
}
}
char[] letters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ".toCharArray();
char[] alphanums = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789".toCharArray();
char[] array = new char[numchars];
for (int i = 0; i < numchars; i++) {
char c;
if (i == 0)
c = letters[random.nextInt(letters.length)];
else
c = alphanums[random.nextInt(alphanums.length)];
array[i] = c;
}
return new String(array);
}
public void setReporter(Reporter reporter) {
this.reporter = reporter;
}
public int _processors(String args[]) {
float multiplier = 1F;
if (args.length > 1)
multiplier = Float.parseFloat(args[1]);
return (int) (Runtime.getRuntime().availableProcessors() * multiplier);
}
public long _maxMemory(String args[]) {
return Runtime.getRuntime().maxMemory();
}
public long _freeMemory(String args[]) {
return Runtime.getRuntime().freeMemory();
}
public long _nanoTime(String args[]) {
return System.nanoTime();
}
public void addTarget(Object target) {
targets.remove(target);
targets.add(target);
}
public void removeTarget(Object target) {
targets.remove(target);
}
public String _unescape(String args[]) {
StringBuilder sb = new StringBuilder();
for (int i = 1; i < args.length; i++) {
sb.append(args[i]);
}
for (int j = 0; j < sb.length() - 1; j++) {
if (sb.charAt(j) == '\\') {
switch (sb.charAt(j + 1)) {
case 'n' :
sb.replace(j, j + 2, "\n");
break;
case 'r' :
sb.replace(j, j + 2, "\r");
break;
case 'b' :
sb.replace(j, j + 2, "\b");
break;
case 'f' :
sb.replace(j, j + 2, "\f");
break;
case 't' :
sb.replace(j, j + 2, "\t");
break;
default :
break;
}
}
}
return sb.toString();
}
}
