org.apache.jasper.runtime

Class BodyContentImpl

java.lang.Object

java.io.Writer

javax.servlet.jsp.JspWriter

javax.servlet.jsp.tagext.BodyContent

org.apache.jasper.runtime.BodyContentImpl

All Implemented Interfaces:

Closeable, Flushable, Appendable, AutoCloseable

public class BodyContentImpl
extends BodyContent

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.

Author:

Rajiv Mordani, Jan Luehe

Field Summary

Fields inherited from class javax.servlet.jsp.JspWriter

autoFlush, bufferSize, DEFAULT_BUFFER, NO_BUFFER, UNBOUNDED_BUFFER

Fields inherited from class java.io.Writer

lock

Constructor Summary

Constructors

Constructor and Description
BodyContentImpl(JspWriter enclosingWriter) Constructor.

Method Summary

Modifier and Type	Method and Description
void	clear() Clear the contents of the buffer.
void	clearBuffer() Clears the current contents of the buffer.
void	close() Close the stream, flushing it first.
int	getBufferSize() This method returns the size of the buffer used by the JspWriter.
Reader	getReader() Return the value of this BodyJspWriter as a Reader.
int	getRemaining() This method returns the number of unused bytes in the buffer.
String	getString() Return the value of the BodyJspWriter as a String.
void	newLine() Write a line separator.
void	print(boolean b) Print a boolean value.
void	print(char c) Print a character.
void	print(char[] s) Print an array of characters.
void	print(double d) Print a double-precision floating-point number.
void	print(float f) Print a floating-point number.
void	print(int i) Print an integer.
void	print(long l) Print a long integer.
void	print(Object obj) Print an object.
void	print(String s) Print a string.
void	println() Terminate the current line by writing the line separator string.
void	println(boolean x) Print a boolean value and then terminate the line.
void	println(char x) Print a character and then terminate the line.
void	println(char[] x) Print an array of characters and then terminate the line.
void	println(double x) Print a double-precision floating-point number and then terminate the line.
void	println(float x) Print a floating-point number and then terminate the line.
void	println(int x) Print an integer and then terminate the line.
void	println(long x) Print a long integer and then terminate the line.
void	println(Object x) Print an Object and then terminate the line.
void	println(String x) Print a String and then terminate the line.
protected void	recycle() This method shall "reset" the internal state of a BodyContentImpl, releasing all internal references, and preparing it for potential reuse by a later invocation of PageContextImpl.pushBody(Writer).
void	write(char[] buf) Write an array of characters.
void	write(char[] cbuf, int off, int len) Write a portion of an array of characters.
void	write(int c) Write a single character.
void	write(String s) Write a string.
void	write(String s, int off, int len) Write a portion of a String.
void	writeOut(Writer out) Write the contents of this BodyJspWriter into a Writer.

Methods inherited from class javax.servlet.jsp.tagext.BodyContent

clearBody, flush, getEnclosingWriter

Methods inherited from class javax.servlet.jsp.JspWriter

isAutoFlush

Methods inherited from class java.io.Writer

append, append, append

Methods inherited from class java.lang.Object

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

Constructor Detail

BodyContentImpl

public BodyContentImpl(JspWriter enclosingWriter)

Constructor.

Parameters:

enclosingWriter - The wrapped writer

Method Detail

write

public void write(int c)
           throws IOException

Write a single character.

Overrides:

write in class Writer

Parameters:

c - The char to write

Throws:

IOException - Error writing to wrapped writer

write

public void write(char[] cbuf,
                  int off,
                  int len)
           throws IOException

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.

Specified by:

write in class Writer

Parameters:

cbuf - A character array

off - Offset from which to start reading characters

len - Number of characters to write

Throws:

IOException - Error writing to wrapped writer

write

public void write(char[] buf)
           throws IOException

Write an array of characters. This method cannot be inherited from the Writer class because it must suppress I/O exceptions.

Overrides:

write in class Writer

Parameters:

buf - Content to write

Throws:

IOException - Error writing to wrapped writer

write

public void write(String s,
                  int off,
                  int len)
           throws IOException

Write a portion of a String.

Overrides:

write in class Writer

Parameters:

s - String to be written

off - Offset from which to start reading characters

len - Number of characters to be written

Throws:

IOException - Error writing to wrapped writer

write

public void write(String s)
           throws IOException

Write a string. This method cannot be inherited from the Writer class because it must suppress I/O exceptions.

Overrides:

write in class Writer

Parameters:

s - String to be written

Throws:

IOException - Error writing to wrapped writer

newLine

public void newLine()
             throws IOException

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.

Specified by:

newLine in class JspWriter

Throws:

IOException - Error writing to wrapped writer

print

public void print(boolean b)
           throws IOException

Print a boolean value. The string produced by 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 write(int) method.

Specified by:

print in class JspWriter

Parameters:

b - The boolean to be printed

Throws:

IOException - Error writing to wrapped writer

print

public void print(char c)
           throws IOException

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 write(int) method.

Specified by:

print in class JspWriter

Parameters:

c - The char to be printed

Throws:

IOException - Error writing to wrapped writer

print

public void print(int i)
           throws IOException

Print an integer. The string produced by 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 write(int) method.

Specified by:

print in class JspWriter

Parameters:

i - The int to be printed

Throws:

IOException - Error writing to wrapped writer

See Also:

Integer.toString(int)

print

public void print(long l)
           throws IOException

Print a long integer. The string produced by 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 write(int) method.

Specified by:

print in class JspWriter

Parameters:

l - The long to be printed

Throws:

IOException - Error writing to wrapped writer

See Also:

Long.toString(long)

print

public void print(float f)
           throws IOException

Print a floating-point number. The string produced by 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 write(int) method.

Specified by:

print in class JspWriter

Parameters:

f - The float to be printed

Throws:

IOException - Error writing to wrapped writer

See Also:

Float.toString(float)

print

public void print(double d)
           throws IOException

Print a double-precision floating-point number. The string produced by 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 write(int) method.

Specified by:

print in class JspWriter

Parameters:

d - The double to be printed

Throws:

IOException - Error writing to wrapped writer

See Also:

Double.toString(double)

print

public void print(char[] s)
           throws IOException

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 write(int) method.

Specified by:

print in class JspWriter

Parameters:

s - The array of chars to be printed

Throws:

NullPointerException - If s is null

IOException - Error writing to wrapped writer

print

public void print(String s)
           throws IOException

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 write(int) method.

Specified by:

print in class JspWriter

Parameters:

s - The String to be printed

Throws:

IOException - Error writing to wrapped writer

print

public void print(Object obj)
           throws IOException

Print an object. The string produced by the 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 write(int) method.

Specified by:

print in class JspWriter

Parameters:

obj - The Object to be printed

Throws:

IOException - Error writing to wrapped writer

See Also:

Object.toString()

println

public void println()
             throws IOException

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').

Specified by:

println in class JspWriter

Throws:

IOException - Error writing to wrapped writer

println

public void println(boolean x)
             throws IOException

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

Specified by:

println in class JspWriter

Parameters:

x - The boolean to be printed

Throws:

IOException - Error writing to wrapped writer

println

public void println(char x)
             throws IOException

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

Specified by:

println in class JspWriter

Parameters:

x - The char to be printed

Throws:

IOException - Error writing to wrapped writer

println

public void println(int x)
             throws IOException

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

Specified by:

println in class JspWriter

Parameters:

x - The int to be printed

Throws:

IOException - Error writing to wrapped writer

println

public void println(long x)
             throws IOException

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

Specified by:

println in class JspWriter

Parameters:

x - The long to be printed

Throws:

IOException - Error writing to wrapped writer

println

public void println(float x)
             throws IOException

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

Specified by:

println in class JspWriter

Parameters:

x - The float to be printed

Throws:

IOException - Error writing to wrapped writer

println

public void println(double x)
             throws IOException

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

Specified by:

println in class JspWriter

Parameters:

x - The double to be printed

Throws:

IOException - Error writing to wrapped writer

println

public void println(char[] x)
             throws IOException

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

Specified by:

println in class JspWriter

Parameters:

x - The char array to be printed

Throws:

IOException - Error writing to wrapped writer

println

public void println(String x)
             throws IOException

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

Specified by:

println in class JspWriter

Parameters:

x - The string to be printed

Throws:

IOException - Error writing to wrapped writer

println

public void println(Object x)
             throws IOException

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

Specified by:

println in class JspWriter

Parameters:

x - The object to be printed

Throws:

IOException - Error writing to wrapped writer

clear

public void clear()
           throws IOException

Clear the contents of the buffer. If the buffer has been already been flushed then the clear operation shall throw an IOException to signal the fact that some data has already been irrevocably written to the client response stream.

Specified by:

clear in class JspWriter

Throws:

IOException - If there is no wrapped writer

clearBuffer

public void clearBuffer()
                 throws IOException

Clears the current contents of the buffer. Unlike clear(), this method will not throw an IOException if the buffer has already been flushed. It merely clears the current content of the buffer and returns.

Specified by:

clearBuffer in class JspWriter

Throws:

IOException - Should not happen

close

public void close()
           throws IOException

Close the stream, flushing it first. Once a stream has been closed, further write() or flush() invocations will cause an IOException to be thrown. Closing a previously-closed stream, however, has no effect.

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Specified by:

close in class JspWriter

Throws:

IOException - Error writing to wrapped writer

getBufferSize

public int getBufferSize()

This method returns the size of the buffer used by the JspWriter.

Overrides:

getBufferSize in class JspWriter

Returns:

the size of the buffer in bytes, or 0 is unbuffered.

getRemaining

public int getRemaining()

Description copied from class: javax.servlet.jsp.JspWriter

This method returns the number of unused bytes in the buffer.

Specified by:

getRemaining in class JspWriter

Returns:

the number of bytes unused in the buffer

getReader

public Reader getReader()

Return the value of this BodyJspWriter as a Reader. Note: this is after evaluation!! There are no scriptlets, etc in this stream.

Specified by:

getReader in class BodyContent

Returns:

the value of this BodyJspWriter as a Reader

getString

public String getString()

Return the value of the BodyJspWriter as a String. Note: this is after evaluation!! There are no scriptlets, etc in this stream.

Specified by:

getString in class BodyContent

Returns:

the value of the BodyJspWriter as a String

writeOut

public void writeOut(Writer out)
              throws IOException

Write the contents of this BodyJspWriter into a Writer. Subclasses are likely to do interesting things with the implementation so some things are extra efficient.

Specified by:

writeOut in class BodyContent

Parameters:

out - The writer into which to place the contents of this body evaluation

Throws:

IOException - Error writing to writer

recycle

protected void recycle()

This method shall "reset" the internal state of a BodyContentImpl, releasing all internal references, and preparing it for potential reuse by a later invocation of PageContextImpl.pushBody(Writer).

Note, that BodyContentImpl instances are usually owned by a PageContextImpl instance, and PageContextImpl instances are recycled and reused.

See Also:

PageContextImpl.release()