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java.lang.Object | +--org.ejen.util.arl.ArlUtil
ArlUtil class utility (static methods).
"ARL" stands for "ARray Language". It is a very basic language that allows
to set elements of an int
array to one of three flag values:
F_ACCEPT
, F_REMOVE
or F_CROSS
.
An ARL sequence looks like "~23;+34;-45;-[46,56];..."
The
meaning of this expression is: "set the 23th element of the array to
F_CROSS
; set the 34th element to F_ACCEPT
; set
the 45th to F_REMOVE
; set all elements between and including
the 46th and the 56th to F_REMOVE
;..."
Order is important: "-[23,56];~34"
means "set all elements of
the array between and including 23 and 56 to F_REMOVE
; then
set the 34th element to F_CROSS
". On the other hand,
"~34;-[23,56]"
is strictly identical to "-[23,56]"
.
The "+" sign (for F_ACCEPT
) is optional: "+45"
is identical
to "45"
.
This language is used for parsers control
(see JavaSourceToXML.process(ExpressionContext,String,String,String)
,
SimpleNode.toNode(Document,Node,int[],int[],boolean)
and Token.toNode(Document,Node,int[],boolean)
).
Field Summary | |
static int |
F_ACCEPT
|
static int |
F_CROSS
|
static int |
F_REMOVE
|
Fields inherited from interface org.ejen.util.arl.ArlParserTreeConstants |
JJTARLEXP, JJTARLSEQUENCE, JJTINTERVAL, jjtNodeName |
Fields inherited from interface org.ejen.util.arl.ArlParserConstants |
ACCEPT, CROSS, DEFAULT, EOF, INTEGER, REMOVE, tokenImage |
Constructor Summary | |
protected |
ArlUtil()
Prevents intanciation. |
Method Summary | |
static int[] |
process(String arl,
int[] array)
Returns the array parameter whose elements are set according to the arl parameter. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
public static final int F_ACCEPT
public static final int F_REMOVE
public static final int F_CROSS
Constructor Detail |
protected ArlUtil()
Method Detail |
public static int[] process(String arl, int[] array)
arl
- an ARL sequence.array
- the array to modify.
WrappedRuntimeException
- parse exception,
array out of bound exception...
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