org.jruby.util

Class ArraySupport

java.lang.Object

org.jruby.util.ArraySupport

public abstract class ArraySupport
extends Object

Support methods for (native) arrays. These utility methods are intended as `System.arraycopy` replacements esp. for common cases such as (method) argument processing, where the arrays are usually small. These are fairly common and for such arrays a length switch + an "inlined" array copy/instantiation cuts the execution time to (at least) half, compared to doing a bare native `arraycopy` (on 8u102).

Author:

kares

Method Summary

Modifier and Type	Method and Description
static void	copy(Object[] src, int srcOff, Object[] dst, int dstOff, int length)
static void	copy(Object[] src, Object[] dst, int dstOff, int length) Copy a source array into a destination array.
static Class[]	newCopy(Class[] src, int length)
static IRubyObject[]	newCopy(IRubyObject[] src, int length)
static IRubyObject[]	newCopy(IRubyObject[] src, int srcOff, int length)
static IRubyObject[]	newCopy(IRubyObject[] src, IRubyObject last)
static IRubyObject[]	newCopy(IRubyObject first, IRubyObject[] src)
static Object[]	newCopy(Object[] src, int length)
static Object[]	newCopy(Object[] src, Object last)

Methods inherited from class java.lang.Object

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

Method Detail

copy

public static void copy(Object[] src,
                        Object[] dst,
                        int dstOff,
                        int length)

Copy a source array into a destination array.

Parameters:

src -

dst -

dstOff - off set to start copying to

length - copied array length

copy

public static void copy(Object[] src,
                        int srcOff,
                        Object[] dst,
                        int dstOff,
                        int length)

newCopy

public static Object[] newCopy(Object[] src,
                               int length)

newCopy

public static IRubyObject[] newCopy(IRubyObject[] src,
                                    int length)

newCopy

public static IRubyObject[] newCopy(IRubyObject[] src,
                                    int srcOff,
                                    int length)

newCopy

public static Class[] newCopy(Class[] src,
                              int length)

newCopy

public static Object[] newCopy(Object[] src,
                               Object last)

newCopy

public static IRubyObject[] newCopy(IRubyObject[] src,
                                    IRubyObject last)

newCopy

public static IRubyObject[] newCopy(IRubyObject first,
                                    IRubyObject[] src)