Package org.apache.velocity.util

Class StringBuilderWriter

java.lang.Object

java.io.Writer

org.apache.velocity.util.StringBuilderWriter

All Implemented Interfaces:

Closeable, Flushable, Serializable, Appendable, AutoCloseable

public class StringBuilderWriter
extends Writer
implements Serializable

Writer implementation that outputs to a StringBuilder.

NOTE: This implementation, as an alternative to java.io.StringWriter, provides an un-synchronized (i.e. for use in a single thread) implementation for better performance. For safe usage with multiple Threads then java.io.StringWriter should be used.

(borrowed from commons.io project)

Since:

2.0

Version:

$Id$

See Also:

Serialized Form

Field Summary

Fields inherited from class java.io.Writer

lock

Constructor Summary

Constructors

Constructor	Description
StringBuilderWriter()	Constructs a new StringBuilder instance with default capacity.
StringBuilderWriter(int capacity)	Constructs a new StringBuilder instance with the specified capacity.
StringBuilderWriter(StringBuilder builder)	Constructs a new instance with the specified StringBuilder.

Method Summary

Modifier and Type	Method	Description
Writer	append(char value)	Appends a single character to this Writer.
Writer	append(CharSequence value)	Appends a character sequence to this Writer.
Writer	append(CharSequence value, int start, int end)	Appends a portion of a character sequence to the StringBuilder.
void	close()	Closing this writer has no effect.
void	flush()	Flushing this writer has no effect.
StringBuilder	getBuilder()	Returns the underlying builder.
String	toString()	Returns StringBuilder.toString().
void	write(char[] value, int offset, int length)	Writes a portion of a character array to the StringBuilder.
void	write(String value)	Writes a String to the StringBuilder.

Methods inherited from class java.io.Writer

write, write, write

Methods inherited from class java.lang.Object

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

Constructor Detail

StringBuilderWriter

public StringBuilderWriter()

Constructs a new StringBuilder instance with default capacity.

StringBuilderWriter

public StringBuilderWriter(int capacity)

Constructs a new StringBuilder instance with the specified capacity.

Parameters:

capacity - The initial capacity of the underlying StringBuilder

StringBuilderWriter

public StringBuilderWriter(StringBuilder builder)

Constructs a new instance with the specified StringBuilder.

If builder is null a new instance with default capacity will be created.

Parameters:

builder - The String builder. May be null.

Method Detail

append

public Writer append(char value)

Appends a single character to this Writer.

Specified by:

append in interface Appendable

Overrides:

append in class Writer

Parameters:

value - The character to append

Returns:

This writer instance

append

public Writer append(CharSequence value)

Appends a character sequence to this Writer.

Specified by:

append in interface Appendable

Overrides:

append in class Writer

Parameters:

value - The character to append

Returns:

This writer instance

append

public Writer append(CharSequence value,
                     int start,
                     int end)

Appends a portion of a character sequence to the StringBuilder.

Specified by:

append in interface Appendable

Overrides:

append in class Writer

Parameters:

value - The character to append

start - The index of the first character

end - The index of the last character + 1

Returns:

This writer instance

close

public void close()

Closing this writer has no effect.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in class Writer

flush

public void flush()

Flushing this writer has no effect.

Specified by:

flush in interface Flushable

Specified by:

flush in class Writer

write

public void write(String value)

Writes a String to the StringBuilder.

Overrides:

write in class Writer

Parameters:

value - The value to write

write

public void write(char[] value,
                  int offset,
                  int length)

Writes a portion of a character array to the StringBuilder.

Specified by:

write in class Writer

Parameters:

value - The value to write

offset - The index of the first character

length - The number of characters to write

getBuilder

public StringBuilder getBuilder()

Returns the underlying builder.

Returns:

The underlying builder

toString

public String toString()

Returns StringBuilder.toString().

Overrides:

toString in class Object

Returns:

The contents of the String builder.