Package de.christofreichardt.diagnosis.io

Class NullPrintStream

java.lang.Object

java.io.OutputStream

java.io.FilterOutputStream

java.io.PrintStream

de.christofreichardt.diagnosis.io.IndentablePrintStream

de.christofreichardt.diagnosis.io.NullPrintStream

All Implemented Interfaces:

Indentable, Closeable, Flushable, Appendable, AutoCloseable

public final class NullPrintStream
extends IndentablePrintStream

The tracer classes return such a NullPrintStream when the current state and the configuration demands that no output should be written. This is equivalent to a redirection to /dev/null.

Author:

Christof Reichardt

Field Summary

Fields inherited from class java.io.FilterOutputStream

out

Constructor Summary

Constructors

Constructor	Description
NullPrintStream()	Default constructor passes a NullOutputStream to the underlying IndentablePrintStream.

Method Summary

Modifier and Type	Method	Description
IndentablePrintStream	append(char c)	Pseudo append()-method.
IndentablePrintStream	append(CharSequence csq)	Pseudo append()-method.
IndentablePrintStream	append(CharSequence csq, int start, int end)	Pseudo append()-method.
boolean	checkError()	Indicates always no error.
protected void	clearError()	Pseudo clearError()-method.
void	close()	Closes the underlying IndentablePrintStream.
void	flush()	Pseudo flush()-method.
IndentablePrintStream	format(String format, Object... args)	Pseudo format()-method.
IndentablePrintStream	format(Locale l, String format, Object... args)	Pseudo format()-method.
void	lock()	Pseudo lock()-method.
void	print(boolean b)	Pseudo print()-method.
void	print(char c)	Pseudo print()-method.
void	print(char[] s)	Pseudo print()-method.
void	print(double d)	Pseudo print()-method.
void	print(float f)	Pseudo print()-method.
void	print(int i)	Pseudo print()-method.
void	print(long l)	Pseudo print()-method.
void	print(Object obj)	Pseudo print()-method.
void	print(String s)	Pseudo print()-method.
IndentablePrintStream	printf(String format, Object... args)	Pseudo printf()-method.
IndentablePrintStream	printf(Locale l, String format, Object... args)	Pseudo printf()-method.
IndentablePrintStream	printfIndentln(String format, Object... args)	A convenience method to print an indented string onto the stream using the specified format string and the given arguments.
IndentablePrintStream	printIndent(String s)	Prints an indented string.
IndentablePrintStream	printIndentln(String s)	Prints an indented string together with a line feed.
IndentablePrintStream	printIndentString()	Prints only the current indentation.
void	println()	Pseudo println()-method.
void	println(boolean x)	Pseudo println()-method.
void	println(char x)	Pseudo println()-method.
void	println(char[] x)	Pseudo println()-method.
void	println(double x)	Pseudo println()-method.
void	println(float x)	Pseudo println()-method.
void	println(int x)	Pseudo println()-method.
void	println(long x)	Pseudo println()-method.
void	println(Object x)	Pseudo println()-method.
void	println(String x)	Pseudo println()-method.
void	runWithLock(Runnable runnable)	Pseudo runWithLock()-method.
protected void	setError()	Pseudo setError()-method.
void	unlock()	Pseudo unlock()-method
void	write(byte[] b)	Pseudo write()-method.
void	write(byte[] buf, int off, int len)	Pseudo write()-method.
void	write(int b)	Pseudo write()-method.

Methods inherited from class java.io.OutputStream

nullOutputStream

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

NullPrintStream

public NullPrintStream()

Default constructor passes a NullOutputStream to the underlying IndentablePrintStream.

Method Detail

printIndent

public IndentablePrintStream printIndent(String s)

Description copied from interface: Indentable

Prints an indented string.

Specified by:

printIndent in interface Indentable

Specified by:

printIndent in class IndentablePrintStream

Parameters:

s - the string to be printed

Returns:

the indentable stream itself

printIndentln

public IndentablePrintStream printIndentln(String s)

Description copied from interface: Indentable

Prints an indented string together with a line feed.

Specified by:

printIndentln in interface Indentable

Specified by:

printIndentln in class IndentablePrintStream

Parameters:

s - the string to be printed

Returns:

the indentable stream itself

printIndentString

public IndentablePrintStream printIndentString()

Description copied from interface: Indentable

Prints only the current indentation.

Specified by:

printIndentString in interface Indentable

Specified by:

printIndentString in class IndentablePrintStream

Returns:

the indentable stream itself

printfIndentln

public IndentablePrintStream printfIndentln(String format,
                                            Object... args)

Description copied from interface: Indentable

A convenience method to print an indented string onto the stream using the specified format string and the given arguments.

Specified by:

printfIndentln in interface Indentable

Specified by:

printfIndentln in class IndentablePrintStream

Parameters:

format - the format string

args - the to be printed arguments

Returns:

the indentable stream itself

lock

public void lock()

Pseudo lock()-method.

Specified by:

lock in class IndentablePrintStream

unlock

public void unlock()

Pseudo unlock()-method

Specified by:

unlock in class IndentablePrintStream

runWithLock

public void runWithLock(Runnable runnable)

Pseudo runWithLock()-method.

Specified by:

runWithLock in class IndentablePrintStream

Parameters:

runnable - should contain print statements

append

public IndentablePrintStream append(CharSequence csq)

Pseudo append()-method.

Specified by:

append in interface Appendable

Overrides:

append in class PrintStream

Parameters:

csq - won't be evaluated

Returns:

this indentable print stream

append

public IndentablePrintStream append(CharSequence csq,
                                    int start,
                                    int end)

Pseudo append()-method.

Specified by:

append in interface Appendable

Overrides:

append in class PrintStream

Parameters:

csq - won't be evaluated

start - won't be evaluated

end - won't be evaluated

Returns:

this indentable print stream

append

public IndentablePrintStream append(char c)

Pseudo append()-method.

Specified by:

append in interface Appendable

Overrides:

append in class PrintStream

Parameters:

c - won't be evaluated

Returns:

this indentable print stream

clearError

protected void clearError()

Pseudo clearError()-method.

Overrides:

clearError in class PrintStream

checkError

public boolean checkError()

Indicates always no error.

Overrides:

checkError in class PrintStream

Returns:

always false

format

public IndentablePrintStream format(Locale l,
                                    String format,
                                    Object... args)

Pseudo format()-method.

Overrides:

format in class PrintStream

Parameters:

l - won't be evaluated

format - won't be evaluated

args - won't be evaluated

Returns:

this indentable print stream

format

public IndentablePrintStream format(String format,
                                    Object... args)

Pseudo format()-method.

Overrides:

format in class PrintStream

Parameters:

format - won't be evaluated

args - won't be evaluated

Returns:

this indentable print stream

print

public void print(char[] s)

Pseudo print()-method.

Overrides:

print in class PrintStream

Parameters:

s - won't be evaluated

print

public void print(Object obj)

Pseudo print()-method.

Overrides:

print in class PrintStream

Parameters:

obj - won't be evaluated

print

public void print(char c)

Pseudo print()-method.

Overrides:

print in class PrintStream

Parameters:

c - won't be evaluated

print

public void print(int i)

Pseudo print()-method.

Overrides:

print in class PrintStream

Parameters:

i - won't be evaluated

print

public void print(String s)

Pseudo print()-method.

Overrides:

print in class PrintStream

Parameters:

s - won't be evaluated

print

public void print(boolean b)

Pseudo print()-method.

Overrides:

print in class PrintStream

Parameters:

b - won't be evaluated

print

public void print(long l)

Pseudo print()-method.

Overrides:

print in class PrintStream

Parameters:

l - won't be evaluated

print

public void print(double d)

Pseudo print()-method.

Overrides:

print in class PrintStream

Parameters:

d - won't be evaluated

print

public void print(float f)

Pseudo print()-method.

Overrides:

print in class PrintStream

Parameters:

f - won't be evaluated

printf

public IndentablePrintStream printf(Locale l,
                                    String format,
                                    Object... args)

Pseudo printf()-method.

Overrides:

printf in class PrintStream

Parameters:

l - won't be evaluated

format - won't be evaluated

args - won't be evaluated

Returns:

this indentable print stream

printf

public IndentablePrintStream printf(String format,
                                    Object... args)

Pseudo printf()-method.

Overrides:

printf in class PrintStream

Parameters:

format - won't be evaluated

args - won't be evaluated

Returns:

this indentable print stream

println

public void println(char[] x)

Pseudo println()-method.

Overrides:

println in class PrintStream

Parameters:

x - won't be evaluated

println

public void println()

Pseudo println()-method.

Overrides:

println in class PrintStream

println

public void println(Object x)

Pseudo println()-method.

Overrides:

println in class PrintStream

Parameters:

x - won't be evaluated

println

public void println(char x)

Pseudo println()-method.

Overrides:

println in class PrintStream

Parameters:

x - won't be evaluated

println

public void println(int x)

Pseudo println()-method.

Overrides:

println in class PrintStream

Parameters:

x - won't be evaluated

println

public void println(String x)

Pseudo println()-method.

Overrides:

println in class PrintStream

Parameters:

x - won't be evaluated

println

public void println(boolean x)

Pseudo println()-method.

Overrides:

println in class PrintStream

Parameters:

x - won't be evaluated

println

public void println(long x)

Pseudo println()-method.

Overrides:

println in class PrintStream

Parameters:

x - won't be evaluated

println

public void println(double x)

Pseudo println()-method.

Overrides:

println in class PrintStream

Parameters:

x - won't be evaluated

println

public void println(float x)

Pseudo println()-method.

Overrides:

println in class PrintStream

Parameters:

x - won't be evaluated

setError

protected void setError()

Pseudo setError()-method.

Overrides:

setError in class PrintStream

write

public void write(int b)

Pseudo write()-method.

Overrides:

write in class PrintStream

Parameters:

b - won't be evaluated

write

public void write(byte[] buf,
                  int off,
                  int len)

Pseudo write()-method.

Overrides:

write in class PrintStream

Parameters:

buf - won't be evaluated

off - won't be evaluated

len - won't be evaluated

write

public void write(byte[] b)

Pseudo write()-method.

Overrides:

write in class FilterOutputStream

Parameters:

b - won't be evaluated

flush

public void flush()

Pseudo flush()-method.

Specified by:

flush in interface Flushable

Overrides:

flush in class PrintStream

close

public void close()

Closes the underlying IndentablePrintStream.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class PrintStream