org.apache.myfaces.shared.util

Class StringCharArrayAccessor

java.lang.Object

org.apache.myfaces.shared.util.StringCharArrayAccessor

public class StringCharArrayAccessor
extends Object

Provides optimized access to java.lang.String internals - Optimized way of creating java.lang.String by reusing a char[] buffer - Optimized way of writing String to java.io.Writer java.lang.String creation reusing a char[] buffer requires Java 1.5+ System property "oam.stringchararrayaccessor.enabled" enables this hack. -Doam.stringchararrayaccessor.enabled=true Read JSR-133, "9.1.1 Post-Construction Modification of Final Fields" http://www.cs.umd.edu/~pugh/java/memoryModel/jsr133.pdf

Author:

Lari Hotari, Sagire Software Oy

See Also:

file licensed under ASL v2.0 Copyright 2009 the original author or authors.

Constructor Summary

Constructors

Constructor and Description
StringCharArrayAccessor()

Method Summary

Methods

Modifier and Type	Method and Description
static String	createString(char[] charBuf) creates a new java.lang.String by setting the char array directly to the String instance with reflection.
static boolean	isEnabled()
static void	writeStringAsCharArray(Writer writer, String str) Writes a portion of a string to a target java.io.Writer with direct access to the char[] of the java.lang.String
static void	writeStringAsCharArray(Writer writer, String str, int off, int len) Writes a portion of a string to a target java.io.Writer with direct access to the char[] of the java.lang.String

Methods inherited from class java.lang.Object

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

Constructor Detail

StringCharArrayAccessor

public StringCharArrayAccessor()

Method Detail

writeStringAsCharArray

public static void writeStringAsCharArray(Writer writer,
                          String str)
                                   throws IOException

Writes a portion of a string to a target java.io.Writer with direct access to the char[] of the java.lang.String

Parameters:

writer - target java.io.Writer for output

str - A String

Throws:

IOException - If an I/O error occurs

writeStringAsCharArray

public static void writeStringAsCharArray(Writer writer,
                          String str,
                          int off,
                          int len)
                                   throws IOException

Writes a portion of a string to a target java.io.Writer with direct access to the char[] of the java.lang.String

Parameters:

writer - target java.io.Writer for output

str - A String

off - Offset from which to start writing characters

len - Number of characters to write

Throws:

IOException - If an I/O error occurs

createString

public static String createString(char[] charBuf)

creates a new java.lang.String by setting the char array directly to the String instance with reflection.

Parameters:

charBuf - char array to be used as java.lang.String content, don't modify it after passing it.

Returns:

new java.lang.String

isEnabled

public static boolean isEnabled()