org.codehaus.groovy.grails.web.util
Class StringCharArrayAccessor

java.lang.Object
  org.codehaus.groovy.grails.web.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 "stringchararrayaccessor.disabled" disables this hack. -Dstringchararrayaccessor.disabled=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

Field Summary

(package private) static Field	countField
(package private) static boolean	enabled
(package private) static Field	offsetField
(package private) static Field	valueField

Constructor Summary

StringCharArrayAccessor()

Method Summary

static String	createString(char[] charBuf) creates a new java.lang.String by setting the char array directly to the String instance with reflection.
(package private) static char[]	getValue(String str)
(package private) static char[]	getValueFallback(String str)
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

Field Detail

enabled

static volatile boolean enabled

valueField

static Field valueField

countField

static Field countField

offsetField

static Field offsetField

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

getValue

static char[] getValue(String str)

getValueFallback

static char[] getValueFallback(String str)

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()