ImportsTest.java

public static class StaticMethods {

        public static String getString1(final String string) {
            return string;
        }

        public static String getString2(final String string) {
            return string;
        }

    }

    public static class StaticMethods2 {
        public static String getString3(final String string, final Integer integer) {
            return string + integer;
        }
    }

    @Test
    public void testImportFunctions() {

        final String drl = "package org.drools.compiler.integrationtests.drl;\n" +
                "import function " + StaticMethods.class.getCanonicalName() + ".*;\n" +
                "import function " + StaticMethods2.class.getCanonicalName() + ".getString3;\n" +
                "import " + Cheese.class.getCanonicalName() + ";\n" +
                "global java.util.List list;\n" +
                "\n" +
                "function String getString4( String string ) {\n" +
                "    return string;\n" +
                "}\n" +
                "\n" +
                "rule \"test rule1\"\n" +
                "    salience 30\n" +
                "    when\n" +
                "        Cheese()\n" +
                "    then\n" +
                "        list.add( getString1( \"rule1\" ) );\n" +
                "end    \n" +
                "\n" +
                "rule \"test rule2\"\n" +
                "    salience 20\n" +
                "    when\n" +
                "        Cheese( type == ( getString2(\"stilton\") ) );\n" +
                "    then\n" +
                "        list.add( getString3( \"rule\", new Integer( 2 ) ) );\n" +
                "end    \n" +
                "\n" +
                "rule \"test rule3\"\n" +
                "    salience 10\n" +
                "    when\n" +
                "        Cheese( $type : type);\n" +
                "        eval( $type.equals( getString1( \"stilton\" ) ) );\n" +
                "    then\n" +
                "        list.add( getString2( \"rule3\" ) );\n" +
                "end    \n" +
                "\n" +
                "rule \"test rule4\"\n" +
                "    salience 0\n" +
                "    when\n" +
                "        Cheese();\n" +
                "    then\n" +
                "        list.add( getString4( \"rule4\" ) );\n" +
                "end";

        final KieBase kbase = KieBaseUtil.getKieBaseFromKieModuleFromDrl("imports-test", kieBaseTestConfiguration, drl);
        final KieSession session = kbase.newKieSession();
        try {
            final Cheese cheese = new Cheese("stilton",
                                             15);
            session.insert(cheese);
            List list = new ArrayList();
            session.setGlobal("list", list);
            final int fired = session.fireAllRules();

            list = (List) session.getGlobal("list");

            assertEquals(4, fired);
            assertEquals(4, list.size());

            assertEquals("rule1", list.get(0));
            assertEquals("rule2", list.get(1));
            assertEquals("rule3", list.get(2));
            assertEquals("rule4", list.get(3));
        } finally {
            session.dispose();
        }
    }