org.apache.jasper.runtime

Class JspWriterImpl

public class JspWriterImpl extends JspWriter

Write text to a character-output stream, buffering characters so as to provide for the efficient writing of single characters, arrays, and strings. Provide support for discarding for the output that has been buffered. This needs revisiting when the buffering problems in the JSP spec are fixed -akv

Author: Anil K. Vijendran

Constructor Summary
JspWriterImpl()
JspWriterImpl(ServletResponse response)
Create a buffered character-output stream that uses a default-sized output buffer.
JspWriterImpl(ServletResponse response, int sz, boolean autoFlush)
Create a new buffered character-output stream that uses an output buffer of the given size.
Method Summary
voidclear()
Discard the output buffer.
voidclearBuffer()
voidclose()
Close the stream.
voidflush()
Flush the stream.
protected voidflushBuffer()
Flush the output buffer to the underlying character stream, without flushing the stream itself.
intgetRemaining()
voidnewLine()
Write a line separator.
voidprint(boolean b)
Print a boolean value.
voidprint(char c)
Print a character.
voidprint(int i)
Print an integer.
voidprint(long l)
Print a long integer.
voidprint(float f)
Print a floating-point number.
voidprint(double d)
Print a double-precision floating-point number.
voidprint(char[] s)
Print an array of characters.
voidprint(String s)
Print a string.
voidprint(Object obj)
Print an object.
voidprintln()
Terminate the current line by writing the line separator string.
voidprintln(boolean x)
Print a boolean value and then terminate the line.
voidprintln(char x)
Print a character and then terminate the line.
voidprintln(int x)
Print an integer and then terminate the line.
voidprintln(long x)
Print a long integer and then terminate the line.
voidprintln(float x)
Print a floating-point number and then terminate the line.
voidprintln(double x)
Print a double-precision floating-point number and then terminate the line.
voidprintln(char[] x)
Print an array of characters and then terminate the line.
voidprintln(String x)
Print a String and then terminate the line.
voidprintln(Object x)
Print an Object and then terminate the line.
voidwrite(int c)
Write a single character.
voidwrite(char[] cbuf, int off, int len)
Write a portion of an array of characters.
voidwrite(char[] buf)
Write an array of characters.
voidwrite(String s, int off, int len)
Write a portion of a String.
voidwrite(String s)
Write a string.

Constructor Detail

JspWriterImpl

public JspWriterImpl()

JspWriterImpl

public JspWriterImpl(ServletResponse response)
Create a buffered character-output stream that uses a default-sized output buffer.

Parameters: response A Servlet Response

JspWriterImpl

public JspWriterImpl(ServletResponse response, int sz, boolean autoFlush)
Create a new buffered character-output stream that uses an output buffer of the given size.

Parameters: response A Servlet Response sz Output-buffer size, a positive integer

Throws: IllegalArgumentException If sz is <= 0

Method Detail

clear

public final void clear()
Discard the output buffer.

clearBuffer

public void clearBuffer()

close

public void close()
Close the stream.

flush

public void flush()
Flush the stream.

flushBuffer

protected final void flushBuffer()
Flush the output buffer to the underlying character stream, without flushing the stream itself. This method is non-private only so that it may be invoked by PrintStream.

getRemaining

public int getRemaining()

Returns: the number of bytes unused in the buffer

newLine

public void newLine()
Write a line separator. The line separator string is defined by the system property line.separator, and is not necessarily a single newline ('\n') character.

Throws: IOException If an I/O error occurs

print

public void print(boolean b)
Print a boolean value. The string produced by java.lang.String#valueOf(boolean) is translated into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of the JspWriterImpl method.

Parameters: b The boolean to be printed

print

public void print(char c)
Print a character. The character is translated into one or more bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of the JspWriterImpl method.

Parameters: c The char to be printed

print

public void print(int i)
Print an integer. The string produced by java.lang.String#valueOf(int) is translated into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of the JspWriterImpl method.

Parameters: i The int to be printed

print

public void print(long l)
Print a long integer. The string produced by java.lang.String#valueOf(long) is translated into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of the JspWriterImpl method.

Parameters: l The long to be printed

print

public void print(float f)
Print a floating-point number. The string produced by java.lang.String#valueOf(float) is translated into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of the JspWriterImpl method.

Parameters: f The float to be printed

print

public void print(double d)
Print a double-precision floating-point number. The string produced by java.lang.String#valueOf(double) is translated into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of the JspWriterImpl method.

Parameters: d The double to be printed

print

public void print(char[] s)
Print an array of characters. The characters are converted into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of the JspWriterImpl method.

Parameters: s The array of chars to be printed

Throws: NullPointerException If s is null

print

public void print(String s)
Print a string. If the argument is null then the string "null" is printed. Otherwise, the string's characters are converted into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of the JspWriterImpl method.

Parameters: s The String to be printed

print

public void print(Object obj)
Print an object. The string produced by the java.lang.String#valueOf(Object) method is translated into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of the JspWriterImpl method.

Parameters: obj The Object to be printed

println

public void println()
Terminate the current line by writing the line separator string. The line separator string is defined by the system property line.separator, and is not necessarily a single newline character ('\n'). Need to change this from PrintWriter because the default println() writes to the sink directly instead of through the write method...

println

public void println(boolean x)
Print a boolean value and then terminate the line. This method behaves as though it invokes JspWriterImpl and then println.

println

public void println(char x)
Print a character and then terminate the line. This method behaves as though it invokes JspWriterImpl and then println.

println

public void println(int x)
Print an integer and then terminate the line. This method behaves as though it invokes JspWriterImpl and then println.

println

public void println(long x)
Print a long integer and then terminate the line. This method behaves as though it invokes JspWriterImpl and then println.

println

public void println(float x)
Print a floating-point number and then terminate the line. This method behaves as though it invokes JspWriterImpl and then println.

println

public void println(double x)
Print a double-precision floating-point number and then terminate the line. This method behaves as though it invokes JspWriterImpl and then println.

println

public void println(char[] x)
Print an array of characters and then terminate the line. This method behaves as though it invokes (char[]) and then println.

println

public void println(String x)
Print a String and then terminate the line. This method behaves as though it invokes print and then println.

println

public void println(Object x)
Print an Object and then terminate the line. This method behaves as though it invokes print and then println.

write

public void write(int c)
Write a single character.

write

public void write(char[] cbuf, int off, int len)
Write a portion of an array of characters.

Ordinarily this method stores characters from the given array into this stream's buffer, flushing the buffer to the underlying stream as needed. If the requested length is at least as large as the buffer, however, then this method will flush the buffer and write the characters directly to the underlying stream. Thus redundant DiscardableBufferedWriters will not copy data unnecessarily.

Parameters: cbuf A character array off Offset from which to start reading characters len Number of characters to write

write

public void write(char[] buf)
Write an array of characters. This method cannot be inherited from the Writer class because it must suppress I/O exceptions.

write

public void write(String s, int off, int len)
Write a portion of a String.

Parameters: s String to be written off Offset from which to start reading characters len Number of characters to be written

write

public void write(String s)
Write a string. This method cannot be inherited from the Writer class because it must suppress I/O exceptions.
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