svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.library / org.gvsig.expressionevaluator / org.gvsig.expressionevaluator.lib / org.gvsig.expressionevaluator.lib.impl / src / main / java / org / gvsig / expressionevaluator / impl / function / string / ReverseFunction.java @ 46047
History | View | Annotate | Download (1.11 KB)
1 |
package org.gvsig.expressionevaluator.impl.function.string; |
---|---|
2 |
|
3 |
import org.apache.commons.lang3.Range; |
4 |
import org.apache.commons.lang3.StringUtils; |
5 |
import org.gvsig.expressionevaluator.Interpreter; |
6 |
import org.gvsig.expressionevaluator.spi.AbstractFunction; |
7 |
|
8 |
public class ReverseFunction extends AbstractFunction { |
9 |
|
10 |
public ReverseFunction() {
|
11 |
super(
|
12 |
"String", "REVERSE", Range.is(1), |
13 |
"reverses a string and returns the result.",
|
14 |
"REVERSE"+"({{string}})", |
15 |
new String[]{ |
16 |
"string - String to reverse."
|
17 |
}, |
18 |
"String",
|
19 |
true
|
20 |
); |
21 |
// Nota:
|
22 |
// Parece ser que no habria falta poner un formatter, H2 es la unica que no
|
23 |
// tiene esta funcion y sl proveedor de gvSIG para h2 se la a?ade.
|
24 |
} |
25 |
|
26 |
@Override
|
27 |
public boolean allowConstantFolding() { |
28 |
return true; |
29 |
} |
30 |
|
31 |
@Override
|
32 |
public Object call(Interpreter interpreter, Object[] args) throws Exception { |
33 |
String string = getStr(args, 0); |
34 |
return StringUtils.reverse(string);
|
35 |
} |
36 |
} |