Package org.apache.jasper.runtime
Class JspWriterImpl
- java.lang.Object
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- java.io.Writer
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- javax.servlet.jsp.JspWriter
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- org.apache.jasper.runtime.JspWriterImpl
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- All Implemented Interfaces:
java.io.Closeable,java.io.Flushable,java.lang.Appendable,java.lang.AutoCloseable
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
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Field Summary
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Fields inherited from class javax.servlet.jsp.JspWriter
autoFlush, bufferSize, DEFAULT_BUFFER, NO_BUFFER, UNBOUNDED_BUFFER
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Constructor Summary
Constructors Constructor Description JspWriterImpl()JspWriterImpl(ServletResponse response, int sz, boolean autoFlush)Create a new buffered character-output stream that uses an output buffer of the given size.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voidclear()Discard the output buffer.voidclearBuffer()Clears the current contents of the buffer.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()This method returns the number of unused bytes in the buffer.voidnewLine()Write a line separator.voidprint(boolean b)Print a boolean value.voidprint(char c)Print a character.voidprint(char[] s)Print an array of characters.voidprint(double d)Print a double-precision floating-point number.voidprint(float f)Print a floating-point number.voidprint(int i)Print an integer.voidprint(long l)Print a long integer.voidprint(java.lang.Object obj)Print an object.voidprint(java.lang.String s)Print a string.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(char[] x)Print an array of characters and then terminate the line.voidprintln(double x)Print a double-precision floating-point number and then terminate the line.voidprintln(float x)Print a floating-point number 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(java.lang.Object x)Print an Object and then terminate the line.voidprintln(java.lang.String x)Print a String and then terminate the line.voidwrite(char[] buf)Write an array of characters.voidwrite(char[] cbuf, int off, int len)Write a portion of an array of characters.voidwrite(int c)Write a single character.voidwrite(java.lang.String s, int off, int len)Write a portion of a String.-
Methods inherited from class javax.servlet.jsp.JspWriter
getBufferSize, isAutoFlush
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Constructor Detail
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JspWriterImpl
public JspWriterImpl()
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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 Responsesz- Output-buffer size, a positive integerautoFlush-trueto automatically flush on buffer full,falseto throw an overflow exception in that case- Throws:
java.lang.IllegalArgumentException- If sz is <= 0
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Method Detail
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flushBuffer
protected final void flushBuffer() throws java.io.IOExceptionFlush 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.- Throws:
java.io.IOException- Error writing buffered data
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clear
public final void clear() throws java.io.IOExceptionDiscard the output buffer.
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clearBuffer
public void clearBuffer() throws java.io.IOExceptionDescription copied from class:javax.servlet.jsp.JspWriterClears 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:
clearBufferin classJspWriter- Throws:
java.io.IOException- If an I/O error occurs
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flush
public void flush() throws java.io.IOExceptionFlush the stream.
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close
public void close() throws java.io.IOExceptionClose the stream.
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getRemaining
public int getRemaining()
Description copied from class:javax.servlet.jsp.JspWriterThis method returns the number of unused bytes in the buffer.- Specified by:
getRemainingin classJspWriter- Returns:
- the number of bytes unused in the buffer
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write
public void write(int c) throws java.io.IOExceptionWrite a single character.- Overrides:
writein classjava.io.Writer- Throws:
java.io.IOException
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write
public void write(char[] cbuf, int off, int len) throws java.io.IOExceptionWrite 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:
writein classjava.io.Writer- Parameters:
cbuf- A character arrayoff- Offset from which to start reading characterslen- Number of characters to write- Throws:
java.io.IOException
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write
public void write(char[] buf) throws java.io.IOExceptionWrite an array of characters. This method cannot be inherited from the Writer class because it must suppress I/O exceptions.- Overrides:
writein classjava.io.Writer- Throws:
java.io.IOException
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write
public void write(java.lang.String s, int off, int len) throws java.io.IOExceptionWrite a portion of a String.- Overrides:
writein classjava.io.Writer- Parameters:
s- String to be writtenoff- Offset from which to start reading characterslen- Number of characters to be written- Throws:
java.io.IOException
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newLine
public void newLine() throws java.io.IOExceptionWrite a line separator. The line separator string is defined by the system propertyline.separator, and is not necessarily a single newline ('\n') character.
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print
public void print(boolean b) throws java.io.IOExceptionPrint a boolean value. The string produced byis translated into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of theString.valueOf(boolean)method.write(int)
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print
public void print(char c) throws java.io.IOExceptionPrint 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 themethod.write(int)
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print
public void print(int i) throws java.io.IOExceptionPrint an integer. The string produced byis translated into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of theString.valueOf(int)method.write(int)
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print
public void print(long l) throws java.io.IOExceptionPrint a long integer. The string produced byis translated into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of theString.valueOf(long)method.write(int)
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print
public void print(float f) throws java.io.IOExceptionPrint a floating-point number. The string produced byis translated into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of theString.valueOf(float)method.write(int)
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print
public void print(double d) throws java.io.IOExceptionPrint a double-precision floating-point number. The string produced byis translated into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of theString.valueOf(double)method.write(int)
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print
public void print(char[] s) throws java.io.IOExceptionPrint 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 themethod.write(int)
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print
public void print(java.lang.String s) throws java.io.IOExceptionPrint a string. If the argument isnullthen 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 themethod.write(int)
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print
public void print(java.lang.Object obj) throws java.io.IOExceptionPrint an object. The string produced by themethod is translated into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of theString.valueOf(Object)method.write(int)
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println
public void println() throws java.io.IOExceptionTerminate the current line by writing the line separator string. The line separator string is defined by the system propertyline.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...
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println
public void println(boolean x) throws java.io.IOExceptionPrint a boolean value and then terminate the line. This method behaves as though it invokesand thenprint(boolean).println()
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println
public void println(char x) throws java.io.IOExceptionPrint a character and then terminate the line. This method behaves as though it invokesand thenprint(char).println()
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println
public void println(int x) throws java.io.IOExceptionPrint an integer and then terminate the line. This method behaves as though it invokesand thenprint(int).println()
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println
public void println(long x) throws java.io.IOExceptionPrint a long integer and then terminate the line. This method behaves as though it invokesand thenprint(long).println()
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println
public void println(float x) throws java.io.IOExceptionPrint a floating-point number and then terminate the line. This method behaves as though it invokesand thenprint(float).println()
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println
public void println(double x) throws java.io.IOExceptionPrint a double-precision floating-point number and then terminate the line. This method behaves as though it invokesand thenprint(double).println()
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println
public void println(char[] x) throws java.io.IOExceptionPrint an array of characters and then terminate the line. This method behaves as though it invokesand thenprint(char[]).println()
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println
public void println(java.lang.String x) throws java.io.IOExceptionPrint a String and then terminate the line. This method behaves as though it invokesand thenprint(String).println()
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println
public void println(java.lang.Object x) throws java.io.IOExceptionPrint an Object and then terminate the line. This method behaves as though it invokesand thenprint(Object).println()
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