This also works: Map<String,String> a = new HashMap<>(); More ways to run into an error Map<String,String> a; a = new HashMap<String,String>(); etc. Using 6.0.0-Final -W On 17/05/2014, rjh <raojinghai(a)gmail.com&gt; wrote: > Hi, > > I got a weird problem. A Java List/Map with generics can be used together > with modify() in the same rule. For example, a simple rule like the > following: > > package com.sample > > import java.util.Map; > import java.util.HashMap; > > declare TestFact > @propertyReactive > data : String > end > > rule "init" > when > not TestFact() > then > insert (new TestFact()); > end > > rule "Test Rule" > when > $fact : TestFact() > then > System.out.println( "Hello" ); > Map<String,String> a = new HashMap<String,String>(); > modify ($fact) {setData("0")} > end > > I got the following error message: > > java.lang.RuntimeException: Error while creating KieBase[Message [id=1, > level=ERROR, path=rules/Sample.drl, line=18, column=0 > text=Unable to resolve type Map<String,String>: > Unable to find class 'Map<String,String>']] > at > org.drools.compiler.kie.builder.impl.KieContainerImpl.getKieBase(KieContainerImpl.java:260) > at > org.drools.compiler.kie.builder.impl.KieContainerImpl.newKieSession(KieContainerImpl.java:400) > at > org.drools.compiler.kie.builder.impl.KieContainerImpl.newKieSession(KieContainerImpl.java:375) > at com.sample.DroolsTest.main(DroolsTest.java:17) > > However, if I remove "<String,String>" from "Map<String,String>", or remove > the "modify" line, the code is correct then. > > Thank you! > > Jinghai > > > > > -- > View this message in context: > http://drools.46999.n3.nabble.com/Map-String-String-and-modify-can-t-be-t... > Sent from the Drools: User forum mailing list archive at Nabble.com. > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users