10:33 a.m.
[
https://issues.jboss.org/browse/JBRULES-3240?page=com.atlassian.jira.plug...
]
Mark Proctor updated JBRULES-3240:
----------------------------------
Assignee: Mario Fusco (was: Mark Proctor)
Unable to build expression for 'inline-eval' when using Lists
of objects
------------------------------------------------------------------------
Key: JBRULES-3240
URL: https://issues.jboss.org/browse/JBRULES-3240
Project: Drools
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: drools-compiler
Affects Versions: 5.3.0.CR1
Environment: Ubuntu, JDK 1.6.0.26
Reporter: Richard Ambridge
Assignee: Mario Fusco
Fix For: 6.0.0.Alpha1
If a Rule has a .size== in when and the variable is an Object, then we get the
following:-
Unable to build expression for 'inline-eval' : [Error: incompatible types in
statement: class java.lang.Integer (compared from: class droolstesting.SubType)]
Full example:
Rule:
package droolstesting
rule "rule2"
dialect "mvel"
when
$m : MyItem(items!=null || items.size == 0)
then
System.out.println("Got 0");
retract($m)
end
MyItems.java:
package droolstesting;
import java.util.ArrayList;
import java.util.List;
public class MyItem {
int number=0;
String string="empty";
List<SubType> items=new ArrayList<SubType>();
public List<SubType> getItems() {
return items;
}
public void setItems(List<SubType> items) {
this.items = items;
}
public int getNumber() {
return number;
}
public void setNumber(int number) {
this.number = number;
}
public String getString() {
return string;
}
public void setString(String string) {
this.string = string;
}
}
SubType.java:
package droolstesting;
public class SubType {
String name="";
}
Main.java:
package droolstesting;
import java.io.File;
import java.io.IOException;
import org.drools.compiler.DroolsParserException;
import org.drools.compiler.PackageBuilder;
import org.drools.io.ResourceFactory;
/**
*
* @author richarda
*/
public class Main {
/**
* @param args the command line arguments
*/
public static void main(String[] args) throws IOException, DroolsParserException {
PackageBuilder pkgBuilder = new PackageBuilder();
pkgBuilder.addPackageFromDrl(ResourceFactory.newClassPathResource("rule1.drl"));
if (pkgBuilder.hasErrors()) {
System.err.println(pkgBuilder.getErrors().toString());
throw new RuntimeException("Unable to compile rules");
}
pkgBuilder.addPackageFromDrl(ResourceFactory.newClassPathResource("rule2.drl"));
if (pkgBuilder.hasErrors()) {
System.err.println(pkgBuilder.getErrors().toString());
throw new RuntimeException("Unable to compile rules");
}
}
}
Result:
run:
Unable to build expression for 'inline-eval' : [Error: incompatible types in
statement: class java.lang.Integer (compared from: class droolstesting.SubType)]
[Near : {... items != null || items.size == 0 ....}]
^
[Line: 6, Column: 14]'items != null || items.size == 0'
[Error: incompatible types in statement: class java.lang.Integer (compared from: class
droolstesting.SubType)]
[Near : {... items != null || items.size == 0 ....}]
^
[Line: 6, Column: 14] : [Rule name='rule2']
[Error: incompatible types in statement: class java.lang.Integer (compared from: class
droolstesting.SubType)]
[Near : {... items != null || items.size == 0 ....}]
^
[Line: 1, Column: 18]
Exception in thread "main" java.lang.RuntimeException: Unable to compile rules
at droolstesting.Main.main(Main.java:32)
Java Result: 1
BUILD SUCCESSFUL (total time: 1 second)
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