Examples of org.drools.compiler.compiler.DrlParser

org.drools.compiler.compiler.DrlParser
This is a low level parser API. This will return textual AST representations of the DRL source, including with DSL expanders if appropriate.

        l.add( add1 );
        l.add( add2 );


        p.setAddresses( l );


        DrlParser parser = new DrlParser( LanguageLevelOption.DRL5 );
        PackageDescr desc = parser.parse( new InputStreamReader( getClass().getResourceAsStream( "nested_fields.drl" ) ) );
        List packageAttrs = desc.getAttributes();
        assertEquals( 1,
                      desc.getRules().size() );
        assertEquals( 1,
                      packageAttrs.size() );

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                      ((List) ksession.getGlobal( "list" )).get( 5 ) );
    }


    @Test
    public void testFromWithNewConstructor() throws Exception {
        DrlParser parser = new DrlParser( LanguageLevelOption.DRL5 );
        PackageDescr descr = parser.parse( new InputStreamReader( getClass().getResourceAsStream( "test_FromWithNewConstructor.drl" ) ) );


        Collection<KnowledgePackage> pkgs = loadKnowledgePackages( descr );
        pkgs = SerializationHelper.serializeObject( pkgs );
    }

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        assertTrue( rhsError.getLine() >= 8 && rhsError.getLine() <= 17 ); // TODO this should be 16
    }


    @Test
    public void testErrorsParser() throws Exception {
        final DrlParser parser = new DrlParser( LanguageLevelOption.DRL5 );
        assertEquals( 0,
                      parser.getErrors().size() );
        parser.parse( new InputStreamReader( getClass().getResourceAsStream( "errors_parser_multiple.drl" ) ) );
        assertTrue( parser.hasErrors() );
        assertTrue( parser.getErrors().size() > 0 );
        assertTrue( parser.getErrors().get( 0 ) instanceof ParserError);
        final ParserError first = ((ParserError) parser.getErrors().get( 0 ));
        assertTrue( first.getMessage() != null );
        assertFalse( first.getMessage().equals( "" ) );
    }

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        assertTrue( list4.contains( chili1 ) );
    }


    @Test
    public void testDumpers() throws Exception {
        final DrlParser parser = new DrlParser( LanguageLevelOption.DRL5 );
        final PackageDescr pkg = parser.parse( new InputStreamReader( getClass().getResourceAsStream( "test_Dumpers.drl" ) ) );


        if ( parser.hasErrors() ) {
            for ( DroolsError error : parser.getErrors() ) {
                logger.warn( error.toString() );
            }
            fail( parser.getErrors().toString() );
        }


        KnowledgeBase kbase = SerializationHelper.serializeObject( loadKnowledgeBase( pkg ) );
        StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();

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    @Test
    public void testDebug() throws Exception {
        String rule = "package com.sample; dialect \"mvel\" rule myRule when then\n System.out.println( \"test\" ); end";
        PackageBuilder builder = new PackageBuilder();
        DrlParser parser = new DrlParser(LanguageLevelOption.DRL5);
        PackageDescr packageDescr = parser.parse(null, rule);
        RuleDescr ruleDescr = packageDescr.getRules().get(0);
        builder = new PackageBuilder( );
        builder.addPackage(packageDescr);
        Package pkg = builder.getPackage();
        MVELConsequence consequence = (MVELConsequence) pkg.getRule("myRule").getConsequence();

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    }


    @Test
    public void testPackage() throws Exception {
        final String source = "package foo.bar.baz";
        final DrlParser parser = new DrlParser(LanguageLevelOption.DRL5);
        final PackageDescr pkg = parser.parse( new StringReader( source ) );
        assertFalse( parser.hasErrors() );
        assertEquals( "foo.bar.baz",
                      pkg.getName() );
    }

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    }


    @Test
    public void testPackageWithError() throws Exception {
        final String source = "package 12 foo.bar.baz";
        final DrlParser parser = new DrlParser(LanguageLevelOption.DRL5);
        final PackageDescr pkg = parser.parse( true,
                                               new StringReader( source ) );
        assertTrue( parser.hasErrors() );
        assertEquals( "foo.bar.baz",
                      pkg.getName() );
    }

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    }


    @Test
    public void testPackageWithError2() throws Exception {
        final String source = "package 12 12312 231";
        final DrlParser parser = new DrlParser(LanguageLevelOption.DRL5);
        final PackageDescr pkg = parser.parse( true,
                                               new StringReader( source ) );
        assertTrue( parser.hasErrors() );
        assertEquals( "",
                      pkg.getName() );
    }

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                      first.getObjectType() );
    }


    @Test
    public void testExpanderLineSpread() throws Exception {
        final DrlParser parser = new DrlParser(LanguageLevelOption.DRL5);
        final PackageDescr pkg = parser.parse( this.getReader( "expander_spread_lines.dslr" ),
                                               this.getReader( "complex.dsl" ) );


        assertFalse( parser.getErrors().toString(),
                     parser.hasErrors() );


        final RuleDescr rule = (RuleDescr) pkg.getRules().get( 0 );
        assertEquals( 1,
                      rule.getLhs().getDescrs().size() );

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    }


    @Test
    public void testExpanderMultipleConstraints() throws Exception {
        final DrlParser parser = new DrlParser(LanguageLevelOption.DRL5);
        final PackageDescr pkg = parser.parse( this.getReader( "expander_multiple_constraints.dslr" ),
                                               this.getReader( "multiple_constraints.dsl" ) );


        assertFalse( parser.getErrors().toString(),
                     parser.hasErrors() );


        final RuleDescr rule = (RuleDescr) pkg.getRules().get( 0 );
        assertEquals( 2,
                      rule.getLhs().getDescrs().size() );

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Related Classes of org.drools.compiler.compiler.DrlParser

org.drools.compiler.builder.impl.KnowledgeBuilderImpl

org.drools.compiler.CommonTestMethodBase

org.drools.compiler.compiler.xml.rules.DumperTestHelper

org.drools.compiler.integrationtests.ConsequenceOffsetTest

org.drools.compiler.integrationtests.LargeRuleBase

org.drools.compiler.integrationtests.LargeRuleBaseSerializationTest

org.drools.compiler.integrationtests.Misc2Test

org.drools.compiler.integrationtests.MiscTest

org.drools.compiler.integrationtests.waltz.Waltz

org.drools.compiler.kie.util.ChangeSetBuilder

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