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:

java.io.Closeable, java.io.Flushable, java.lang.Appendable

public class BodyContentImpl
extends javax.servlet.jsp.tagext.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

BodyContentImpl

public BodyContentImpl(javax.servlet.jsp.JspWriter enclosingWriter)

Constructor.

write

public void write(int c)
           throws java.io.IOException

Write a single character.

Overrides:

write in class java.io.Writer

Throws:

java.io.IOException

write

public void write(char[] cbuf,
                  int off,
                  int len)
           throws java.io.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 java.io.Writer

Parameters:

cbuf - A character array

off - Offset from which to start reading characters

len - Number of characters to write

Throws:

java.io.IOException

write

public void write(char[] buf)
           throws java.io.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 java.io.Writer

Throws:

java.io.IOException

write

public void write(java.lang.String s,
                  int off,
                  int len)
           throws java.io.IOException

Write a portion of a String.

Overrides:

write in class java.io.Writer

Parameters:

s - String to be written

off - Offset from which to start reading characters

len - Number of characters to be written

Throws:

java.io.IOException

write

public void write(java.lang.String s)
           throws java.io.IOException

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

Overrides:

write in class java.io.Writer

Throws:

java.io.IOException

newLine

public void newLine()
             throws java.io.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 javax.servlet.jsp.JspWriter

Throws:

java.io.IOException - If an I/O error occurs

print

public void print(boolean b)
           throws java.io.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 javax.servlet.jsp.JspWriter

Parameters:

b - The boolean to be printed

Throws:

java.io.IOException

print

public void print(char c)
           throws java.io.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 javax.servlet.jsp.JspWriter

Parameters:

c - The char to be printed

Throws:

java.io.IOException

print

public void print(int i)
           throws java.io.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 javax.servlet.jsp.JspWriter

Parameters:

i - The int to be printed

Throws:

java.io.IOException

See Also:

Integer.toString(int)

print

public void print(long l)
           throws java.io.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 javax.servlet.jsp.JspWriter

Parameters:

l - The long to be printed

Throws:

java.io.IOException

See Also:

Long.toString(long)

print

public void print(float f)
           throws java.io.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 javax.servlet.jsp.JspWriter

Parameters:

f - The float to be printed

Throws:

java.io.IOException

See Also:

Float.toString(float)

print

public void print(double d)
           throws java.io.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 javax.servlet.jsp.JspWriter

Parameters:

d - The double to be printed

Throws:

java.io.IOException

See Also:

Double.toString(double)

print

public void print(char[] s)
           throws java.io.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 javax.servlet.jsp.JspWriter

Parameters:

s - The array of chars to be printed

Throws:

java.lang.NullPointerException - If s is null

java.io.IOException

print

public void print(java.lang.String s)
           throws java.io.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 javax.servlet.jsp.JspWriter

Parameters:

s - The String to be printed

Throws:

java.io.IOException

print

public void print(java.lang.Object obj)
           throws java.io.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 javax.servlet.jsp.JspWriter

Parameters:

obj - The Object to be printed

Throws:

java.io.IOException

See Also:

Object.toString()

println

public void println()
             throws java.io.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 javax.servlet.jsp.JspWriter

Throws:

java.io.IOException

println

public void println(boolean x)
             throws java.io.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 javax.servlet.jsp.JspWriter

Parameters:

x - the boolean to write

Throws:

java.io.IOException

println

public void println(char x)
             throws java.io.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 javax.servlet.jsp.JspWriter

Parameters:

x - the char to write

Throws:

java.io.IOException

println

public void println(int x)
             throws java.io.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 javax.servlet.jsp.JspWriter

Parameters:

x - the int to write

Throws:

java.io.IOException

println

public void println(long x)
             throws java.io.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 javax.servlet.jsp.JspWriter

Parameters:

x - the long to write

Throws:

java.io.IOException

println

public void println(float x)
             throws java.io.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 javax.servlet.jsp.JspWriter

Parameters:

x - the float to write

Throws:

java.io.IOException

println

public void println(double x)
             throws java.io.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 javax.servlet.jsp.JspWriter

Parameters:

x - the double to write

Throws:

java.io.IOException

println

public void println(char[] x)
             throws java.io.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 javax.servlet.jsp.JspWriter

Parameters:

x - the char[] to write

Throws:

java.io.IOException

println

public void println(java.lang.String x)
             throws java.io.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 javax.servlet.jsp.JspWriter

Parameters:

x - the String to write

Throws:

java.io.IOException

println

public void println(java.lang.Object x)
             throws java.io.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 javax.servlet.jsp.JspWriter

Parameters:

x - the Object to write

Throws:

java.io.IOException

clear

public void clear()
           throws java.io.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 javax.servlet.jsp.JspWriter

Throws:

java.io.IOException - If an I/O error occurs

clearBuffer

public void clearBuffer()
                 throws java.io.IOException

Clears the current contents of the buffer. Unlike clear(), this mehtod 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 javax.servlet.jsp.JspWriter

Throws:

java.io.IOException - If an I/O error occurs

close

public void close()
           throws java.io.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 java.io.Closeable

Specified by:

close in class javax.servlet.jsp.JspWriter

Throws:

java.io.IOException - If an I/O error occurs

getBufferSize

public int getBufferSize()

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

Overrides:

getBufferSize in class javax.servlet.jsp.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 javax.servlet.jsp.JspWriter

Returns:

the number of bytes unused in the buffer

getReader

public java.io.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 javax.servlet.jsp.tagext.BodyContent

Returns:

the value of this BodyJspWriter as a Reader

getString

public java.lang.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 javax.servlet.jsp.tagext.BodyContent

Returns:

the value of the BodyJspWriter as a String

writeOut

public void writeOut(java.io.Writer out)
              throws java.io.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 javax.servlet.jsp.tagext.BodyContent

Parameters:

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

Throws:

java.io.IOException - if an I/O error occurred while writing the contents of this BodyContent to the given 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()