Examples of org.drools.rule.builder.dialect.java.JavaDialectConfiguration

Package org.drools.rule.builder.dialect.java

Examples of org.drools.rule.builder.dialect.java.JavaDialectConfiguration

org.drools.rule.builder.dialect.java.JavaDialectConfiguration
There are options to use various flavours of runtime compilers. Apache JCI is used as the interface to all the runtime compilers. You can also use the system property "drools.compiler" to set the desired compiler. The valid values are "ECLIPSE" and "JANINO" only. drools.dialect.java.compiler = drools.dialect.java.lngLevel = <1.5|1.6> The default compiler is Eclipse and the default lngLevel is 1.5. The lngLevel will attempt to autodiscover your system using the system property "java.version" The JavaDialectConfiguration will attempt to validate that the specified compiler is in the classpath, using ClassLoader.loasClass(String). If you intented to just Janino sa the compiler you must either overload the compiler property before instantiating this class or the PackageBuilder, or make sure Eclipse is in the classpath, as Eclipse is the default.

        final PackageDescr packageDescr = parser.parse( reader );
        if ( parser.hasErrors() ) {
            fail( "Error messages in parser, need to sort this our (or else collect error messages)\n" + parser.getErrors() );
        }
        // pre build the package
        JavaDialectConfiguration jconf = (JavaDialectConfiguration) conf.getDialectConfiguration( "java" );
        // required because JANINO compiler fails for some java 5 code features
        jconf.setCompiler( JavaDialectConfiguration.ECLIPSE );
        final PackageBuilder builder = new PackageBuilder( conf );
        builder.addPackage( packageDescr );
        if ( builder.hasErrors() ) {
            fail( builder.getErrors().toString() );
        }

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    }


    @Test
    public void testJaninoEval() throws Exception {
        final PackageBuilderConfiguration config = new PackageBuilderConfiguration();
        JavaDialectConfiguration javaConf = (JavaDialectConfiguration) config.getDialectConfiguration( "java" );
        javaConf.setCompiler( JavaDialectConfiguration.JANINO );


        final PackageBuilder builder = new PackageBuilder( config );
        builder.addPackageFromDrl( new InputStreamReader( getClass().getResourceAsStream( "eval_rule_test.drl" ) ) );
        final Package pkg = builder.getPackage();

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    }


    @Test
    public void testWithInvalidRule() throws Exception {
        final PackageBuilderConfiguration conf = new PackageBuilderConfiguration();
        final JavaDialectConfiguration jconf = (JavaDialectConfiguration) conf.getDialectConfiguration( "java" );
        jconf.setCompiler( JavaDialectConfiguration.ECLIPSE );
        final PackageBuilder builder = new PackageBuilder( conf );
        builder.addPackageFromDrl( new InputStreamReader( getClass().getResourceAsStream( "invalid_rule.drl" ) ) );
        final Package pkg = builder.getPackage();
        // Mark: please check if the conseqeuence/should/shouldn't be built
        // Rule badBoy = pkg.getRules()[0];

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    }


    @Test
    public void testJaninoEval() throws Exception {
        final PackageBuilderConfiguration config = new PackageBuilderConfiguration();
        JavaDialectConfiguration javaConf = (JavaDialectConfiguration) config.getDialectConfiguration( "java" );
        javaConf.setCompiler( JavaDialectConfiguration.JANINO );


        final PackageBuilder builder = new PackageBuilder( config );
        builder.addPackageFromDrl( new InputStreamReader( getClass().getResourceAsStream( "eval_rule_test.drl" ) ) );
        final Package pkg = builder.getPackage();

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    }


    @Test
    public void testWithInvalidRule() throws Exception {
        final PackageBuilderConfiguration conf = new PackageBuilderConfiguration();
        final JavaDialectConfiguration jconf = (JavaDialectConfiguration) conf.getDialectConfiguration( "java" );
        jconf.setCompiler( JavaDialectConfiguration.ECLIPSE );
        final PackageBuilder builder = new PackageBuilder( conf );
        builder.addPackageFromDrl( new InputStreamReader( getClass().getResourceAsStream( "invalid_rule.drl" ) ) );
        final Package pkg = builder.getPackage();
        // Mark: please check if the conseqeuence/should/shouldn't be built
        // Rule badBoy = pkg.getRules()[0];

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        String header = "import com.billasurf.Person\n import com.billasurf.Board";
        builder.addPackageFromDrl( new StringReader(header) );
        assertFalse(builder.hasErrors());


        JavaDialectConfiguration javaConf = ( JavaDialectConfiguration ) builder.getPackageBuilderConfiguration().getDialectConfiguration( "java" );
        assertEquals(JavaDialectConfiguration.ECLIPSE, javaConf.getCompiler());


        String ruleAtom = "rule foo \n when \n Person() \n then \n System.out.println(42); end";
        builder.addPackageFromDrl( new StringReader(ruleAtom) );
        if (builder.hasErrors()) {
            System.err.println(builder.getErrors().getErrors()[0].getMessage());

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        String header = "import com.billasurf.Person\n import com.billasurf.Board\n declare GenBean \n name: String \n end";
        builder.addPackageFromDrl( new StringReader(header) );
        assertFalse(builder.hasErrors());


        JavaDialectConfiguration javaConf = ( JavaDialectConfiguration ) builder.getPackageBuilderConfiguration().getDialectConfiguration( "java" );
        assertEquals(JavaDialectConfiguration.ECLIPSE, javaConf.getCompiler());


        String ruleAtom = "rule foo \n when \n Person() \n GenBean(name=='mike')\n then \n System.out.println(42); end";
        builder.addPackageFromDrl( new StringReader(ruleAtom) );
        if (builder.hasErrors()) {
            System.err.println(builder.getErrors().getErrors()[0].getMessage());

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        String header = "import com.billasurf.Person\n import com.billasurf.Board";
        builder.addPackageFromDrl( new StringReader(header) );
        assertFalse(builder.hasErrors());


        JavaDialectConfiguration javaConf = ( JavaDialectConfiguration ) builder.getPackageBuilderConfiguration().getDialectConfiguration( "java" );
        assertEquals(JavaDialectConfiguration.ECLIPSE, javaConf.getCompiler());
    }

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        String header = "import com.billasurf.Person\n import com.billasurf.Board";
        builder.addPackageFromDrl( new StringReader(header) );
        assertFalse(builder.hasErrors());


        JavaDialectConfiguration javaConf = ( JavaDialectConfiguration ) builder.getPackageBuilderConfiguration().getDialectConfiguration( "java" );
        assertEquals(JavaDialectConfiguration.ECLIPSE, javaConf.getCompiler());
    }

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    }


    @Test
    public void testJaninoEval() throws Exception {
        final PackageBuilderConfiguration config = new PackageBuilderConfiguration();
        JavaDialectConfiguration javaConf = (JavaDialectConfiguration) config.getDialectConfiguration( "java" );
        javaConf.setCompiler( JavaDialectConfiguration.JANINO );


        final PackageBuilder builder = new PackageBuilder( config );
        builder.addPackageFromDrl( new InputStreamReader( getClass().getResourceAsStream( "eval_rule_test.drl" ) ) );
        final Package pkg = builder.getPackage();

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