On 06/07/07, Christoph Gaffga (triplemind.com) <[EMAIL PROTECTED]> wrote:
hi all,
I have some problems to use Jexl expressions to look for special
characters in strings, like newline or tabs:
e = ExpressionFactory.createExpression("foo.bar.indexOf('\n')");
Does not look valid syntax.
Try
e = ExpressionFactory.createExpression("foo.bar.indexOf('"\n'")");
o = e.evaluate(jc);
there seem to be no way to encode the linebreak, I also tried '\\n' etc.
No chance, always get an exception.
Is this a bug in Jexl or is it my fault? Has anybody done this? How?
I would appreciate any help...
kind regards,
Christoph
P.S.: Here is my test programm:
import org.apache.commons.jexl.Expression;
import org.apache.commons.jexl.ExpressionFactory;
import org.apache.commons.jexl.JexlContext;
import org.apache.commons.jexl.JexlHelper;
public class TestJexlLinebreaks {
public static class Foo {
String bar = "This is line 1,\nline 2,\nline 3.";
public String getBar() {
return this.bar;
}
}
public static void main(String[] args) throws Exception {
// First make a jexlContext and put stuff in it...
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("foo", new Foo());
jc.getVars().put("number", new Integer(10));
// access a property...
Expression e = ExpressionFactory.createExpression("foo.bar");
Object o = e.evaluate(jc);
System.out.println("Return foo.bar: " + o);
// try to search for newline...
e = ExpressionFactory.createExpression("foo.bar.indexOf('\n')");
o = e.evaluate(jc);
System.out.println("Return foo.bar.indexOf('\\n'): " + o);
}
}
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