Examples of org.drools.compiler.PackageBuilder

org.drools.compiler.PackageBuilder
This is the main compiler class for parsing and compiling rules and assembling or merging them into a binary Package instance. This can be done by merging into existing binary packages, or totally from source. If you are using the Java dialect 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. Normally, a complete package is built using one of the applicable addPackageFromXXX methods. It is however possible to construct a package incrementally by adding individual component parts. When a package is built incrementally package level attributes are cached and applied to Rules subsequently added. Caution should be exercised when using the same PackageBuilder to construct packages from multiple sources as the cached package level attributes will still apply even if the resource added to PackageBuilder does not explicitly include package level attributes.

            workingMemory.startProcess("org.drools.exception");
        assertEquals(ProcessInstance.STATE_COMPLETED, processInstance.getState());
    }
    
    public void testCompositeNodeExceptionHandlerTriggerNode() {
        PackageBuilder builder = new PackageBuilder();
        Reader source = new StringReader(
            "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
            "<process xmlns=\"http://drools.org/drools-5.0/process\"\n" +
            "         xmlns:xs=\"http://www.w3.org/2001/XMLSchema-instance\"\n" +
            "         xs:schemaLocation=\"http://drools.org/drools-5.0/process drools-processes-5.0.xsd\"\n" +
            "         type=\"RuleFlow\" name=\"flow\" id=\"org.drools.exception\" package-name=\"org.drools\" version=\"1\" >\n" +
            "\n" +
            "  <header>\n" +
      "    <globals>\n" +
      "      <global identifier=\"list\" type=\"java.util.List\" />\n" +
      "    </globals>\n" +
      "  </header>\n" +
            "\n" +
            "  <nodes>\n" +
            "    <start id=\"1\" name=\"Start\" />\n" +
            "    <composite id=\"2\" name=\"Composite\" >\n" +
            "      <variables>\n" +
            "        <variable name=\"SomeVar\" >\n" +
            "          <type name=\"org.drools.process.core.datatype.impl.type.StringDataType\" />\n" +
            "          <value>SomeValue</value>\n" +
            "        </variable>\n" +
            "        <variable name=\"FaultVariable\" >\n" +
            "          <type name=\"org.drools.process.core.datatype.impl.type.StringDataType\" />\n" +
            "        </variable>\n" +
            "      </variables>\n" +
        "      <exceptionHandlers>\n" +
        "        <exceptionHandler faultName=\"MyFault\" type=\"action\" faultVariable=\"FaultVariable\" >\n" +
        "          <action type=\"expression\" name=\"Trigger\" dialect=\"java\" >context.getProcessInstance().signalEvent(\"MyEvent\", null);</action>\n" +
        "        </exceptionHandler>\n" +
        "      </exceptionHandlers>\n" +
            "      <nodes>\n" +
            "        <fault id=\"1\" name=\"Fault\" faultName=\"MyFault\" faultVariable=\"SomeVar\" />\n" +
            "        <eventNode id=\"2\" name=\"Event\" >\n" +
            "          <eventFilters>\n" +
            "            <eventFilter type=\"eventType\" eventType=\"MyEvent\" />\n" +
            "          </eventFilters>\n" +
            "        </eventNode>\n" +
            "        <actionNode id=\"3\" name=\"Action\" >\n" +
            "          <action type=\"expression\" dialect=\"java\" >list.add(context.getVariable(\"FaultVariable\"));</action>\n" +
            "        </actionNode>\n" +
            "      </nodes>\n" +
            "      <connections>\n" +
            "        <connection from=\"2\" to=\"3\" />\n" +
        "      </connections>\n" +
        "      <in-ports>\n" +
        "        <in-port type=\"DROOLS_DEFAULT\" nodeId=\"1\" nodeInType=\"DROOLS_DEFAULT\" />\n" +
        "      </in-ports>\n" +
        "      <out-ports>\n" +
        "        <out-port type=\"DROOLS_DEFAULT\" nodeId=\"3\" nodeOutType=\"DROOLS_DEFAULT\" />\n" +
        "      </out-ports>\n" +
        "    </composite>\n" +
            "    <end id=\"3\" name=\"End\" />" +
            "  </nodes>\n" +
            "\n" +
            "  <connections>\n" +
            "    <connection from=\"1\" to=\"2\" />\n" +
            "    <connection from=\"2\" to=\"3\" />\n" +
            "  </connections>\n" +
            "\n" +
            "</process>");


    builder.addRuleFlow(source);
        Package pkg = builder.getPackage();
        RuleBase ruleBase = RuleBaseFactory.newRuleBase();
        ruleBase.addPackage( pkg );
        WorkingMemory workingMemory = ruleBase.newStatefulSession();
        List<String> list = new ArrayList<String>();
        workingMemory.setGlobal("list", list);

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        assertEquals("SomeValue", list.get(0));
        assertEquals(ProcessInstance.STATE_COMPLETED, processInstance.getState());
    }
    
    public void testNestedExceptionHandler() {
        PackageBuilder builder = new PackageBuilder();
        Reader source = new StringReader(
            "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
            "<process xmlns=\"http://drools.org/drools-5.0/process\"\n" +
            "         xmlns:xs=\"http://www.w3.org/2001/XMLSchema-instance\"\n" +
            "         xs:schemaLocation=\"http://drools.org/drools-5.0/process drools-processes-5.0.xsd\"\n" +
            "         type=\"RuleFlow\" name=\"flow\" id=\"org.drools.exception\" package-name=\"org.drools\" version=\"1\" >\n" +
            "\n" +
            "  <header>\n" +
      "    <globals>\n" +
      "      <global identifier=\"list\" type=\"java.util.List\" />\n" +
      "    </globals>\n" +
      "    <exceptionHandlers>\n" +
      "      <exceptionHandler faultName=\"otherFault\" type=\"action\" >\n" +
      "        <action type=\"expression\" name=\"Print\" dialect=\"java\" >list.add(\"Triggered global exception scope\");</action>\n" +
      "      </exceptionHandler>\n" +
      "    </exceptionHandlers>\n" +
      "  </header>\n" +
            "\n" +
            "  <nodes>\n" +
            "    <start id=\"1\" name=\"Start\" />\n" +
            "    <composite id=\"2\" name=\"Composite\" >\n" +
            "      <variables>\n" +
            "        <variable name=\"SomeVar\" >\n" +
            "          <type name=\"org.drools.process.core.datatype.impl.type.StringDataType\" />\n" +
            "          <value>SomeValue</value>\n" +
            "        </variable>\n" +
            "        <variable name=\"FaultVariable\" >\n" +
            "          <type name=\"org.drools.process.core.datatype.impl.type.StringDataType\" />\n" +
            "        </variable>\n" +
            "      </variables>\n" +
        "      <exceptionHandlers>\n" +
        "        <exceptionHandler faultName=\"MyFault\" type=\"action\" faultVariable=\"FaultVariable\" >\n" +
        "          <action type=\"expression\" name=\"Trigger\" dialect=\"java\" >((org.jbpm.workflow.instance.node.CompositeNodeInstance) context.getNodeInstance()).signalEvent(\"MyEvent\", null);</action>\n" +
        "        </exceptionHandler>\n" +
        "      </exceptionHandlers>\n" +
            "      <nodes>\n" +
            "        <fault id=\"1\" name=\"Fault\" faultName=\"MyFault\" faultVariable=\"SomeVar\" />\n" +
            "        <eventNode id=\"2\" name=\"Event\" >\n" +
            "          <eventFilters>\n" +
            "            <eventFilter type=\"eventType\" eventType=\"MyEvent\" />\n" +
            "          </eventFilters>\n" +
            "        </eventNode>\n" +
            "        <fault id=\"3\" name=\"Fault\" faultName=\"otherFault\" />\n" +
            "      </nodes>\n" +
            "      <connections>\n" +
            "        <connection from=\"2\" to=\"3\" />\n" +
        "      </connections>\n" +
        "      <in-ports>\n" +
        "        <in-port type=\"DROOLS_DEFAULT\" nodeId=\"1\" nodeInType=\"DROOLS_DEFAULT\" />\n" +
        "      </in-ports>\n" +
        "    </composite>\n" +
            "    <end id=\"3\" name=\"End\" />" +
            "  </nodes>\n" +
            "\n" +
            "  <connections>\n" +
            "    <connection from=\"1\" to=\"2\" />\n" +
            "    <connection from=\"2\" to=\"3\" />\n" +
            "  </connections>\n" +
            "\n" +
            "</process>");


    builder.addRuleFlow(source);
        Package pkg = builder.getPackage();
        RuleBase ruleBase = RuleBaseFactory.newRuleBase();
        ruleBase.addPackage( pkg );
        WorkingMemory workingMemory = ruleBase.newStatefulSession();
        List<String> list = new ArrayList<String>();
        workingMemory.setGlobal("list", list);

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        new ConnectionImpl( workItemNode3,
                            Node.CONNECTION_DEFAULT_TYPE,
                            end,
                            Node.CONNECTION_DEFAULT_TYPE );


        PackageBuilder packageBuilder = new PackageBuilder();
        ProcessBuilderImpl processBuilder = new ProcessBuilderImpl( packageBuilder );
        processBuilder.buildProcess( process,
                                     null );
        List<KnowledgePackage> list = new ArrayList<KnowledgePackage>();
        list.add( new KnowledgePackageImp( packageBuilder.getPackage() ) );
        return list;
    }

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        new ConnectionImpl( subProcessNode,
                            Node.CONNECTION_DEFAULT_TYPE,
                            end,
                            Node.CONNECTION_DEFAULT_TYPE );


        PackageBuilder packageBuilder = new PackageBuilder();
        ProcessBuilderImpl processBuilder = new ProcessBuilderImpl( packageBuilder );
        processBuilder.buildProcess( process,
                                     null );


        process = new RuleFlowProcess();
        process.setId( "org.drools.test.SubProcess" );
        process.setName( "SubProcess" );
        process.setPackageName( "org.drools.test" );
        start = new StartNode();
        start.setId( 1 );
        start.setName( "Start" );
        process.addNode( start );
        actionNode = new ActionNode();
        actionNode.setId( 2 );
        actionNode.setName( "Action" );
        action = new DroolsConsequenceAction();
        action.setDialect( "java" );
        action.setConsequence( "System.out.println(\"Executed action\");" );
        actionNode.setAction( action );
        process.addNode( actionNode );
        new ConnectionImpl( start,
                            Node.CONNECTION_DEFAULT_TYPE,
                            actionNode,
                            Node.CONNECTION_DEFAULT_TYPE );
        WorkItemNode workItemNode = new WorkItemNode();
        workItemNode.setId( 3 );
        workItemNode.setName( "WorkItem1" );
        Work work = new WorkImpl();
        work.setName( "MyWork" );
        workItemNode.setWork( work );
        process.addNode( workItemNode );
        new ConnectionImpl( actionNode,
                            Node.CONNECTION_DEFAULT_TYPE,
                            workItemNode,
                            Node.CONNECTION_DEFAULT_TYPE );
        end = new EndNode();
        end.setId( 6 );
        end.setName( "End" );
        process.addNode( end );
        new ConnectionImpl( workItemNode,
                            Node.CONNECTION_DEFAULT_TYPE,
                            end,
                            Node.CONNECTION_DEFAULT_TYPE );


        processBuilder.buildProcess( process,
                                     null );
        return packageBuilder.getPackage();
    }

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        new ConnectionImpl( actionNode,
                            Node.CONNECTION_DEFAULT_TYPE,
                            end,
                            Node.CONNECTION_DEFAULT_TYPE );


        PackageBuilder packageBuilder = new PackageBuilder();
        ProcessBuilderImpl processBuilder = new ProcessBuilderImpl( packageBuilder );
        processBuilder.buildProcess( process,
                                     null );
        List<KnowledgePackage> list = new ArrayList<KnowledgePackage>();
        list.add( new KnowledgePackageImp( packageBuilder.getPackage() ) );
        return list;
    }

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        new ConnectionImpl( actionNode,
                            Node.CONNECTION_DEFAULT_TYPE,
                            end,
                            Node.CONNECTION_DEFAULT_TYPE );


        PackageBuilder packageBuilder = new PackageBuilder();
        ProcessBuilderImpl processBuilder = new ProcessBuilderImpl( packageBuilder );
        processBuilder.buildProcess( process,
                                     null );
        List<KnowledgePackage> list = new ArrayList<KnowledgePackage>();
        list.add( new KnowledgePackageImp( packageBuilder.getPackage() ) );
        return list;
    }

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      InputStream is = getClass().getResourceAsStream(xlResource);
      String drl = converter.compile(is, InputType.XLS );      
      
      if (drl != null) {  
        PackageBuilder builder = new PackageBuilder();
        builder.addPackageFromDrl( new StringReader(drl) );
        
        Package pkg = builder.getPackage();
        
        if (pkg != null) {
          excelRules = RuleBaseFactory.newRuleBase();
          excelRules.addPackage( pkg );
        }

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    }


    public void testDynamicRuleAdditions() throws Exception {
        Reader reader = new InputStreamReader( getClass().getResourceAsStream( "test_Dynamic1.drl" ) );


        PackageBuilder builder = new PackageBuilder();
        builder.addPackageFromDrl( reader );
        final Package pkg1 = serialisePackage( builder.getPackage() );


        final RuleBase ruleBase = getRuleBase();
        ruleBase.addPackage( pkg1 );
        final WorkingMemory workingMemory = ruleBase.newStatefulSession();
        workingMemory.setGlobal( "total",
                                 new Integer( 0 ) );


        final List list = new ArrayList();
        workingMemory.setGlobal( "list",
                                 list );


        // Adding person in advance. There is no Person() object
        // type node in memory yet, but the rule engine is supposed
        // to handle that correctly
        final PersonInterface bob = new Person( "bob",
                                                "stilton" );
        bob.setStatus( "Not evaluated" );
        workingMemory.insert( bob );


        final Cheese stilton = new Cheese( "stilton",
                                           5 );
        workingMemory.insert( stilton );


        final Cheese cheddar = new Cheese( "cheddar",
                                           5 );
        workingMemory.insert( cheddar );
        workingMemory.fireAllRules();


        assertEquals( 1,
                      list.size() );


        assertEquals( "stilton",
                      list.get( 0 ) );


        reader = new InputStreamReader( getClass().getResourceAsStream( "test_Dynamic2.drl" ) );
        builder = new PackageBuilder();
        builder.addPackageFromDrl( reader );
        final Package pkg2 = serialisePackage( builder.getPackage() );
        ruleBase.addPackage( pkg2 );


        assertEquals( 3,
                      list.size() );


        assertEquals( "stilton",
                      list.get( 0 ) );


        assertTrue( "cheddar".equals( list.get( 1 ) ) || "cheddar".equals( list.get( 2 ) ) );


        assertTrue( "stilton".equals( list.get( 1 ) ) || "stilton".equals( list.get( 2 ) ) );


        list.clear();


        reader = new InputStreamReader( getClass().getResourceAsStream( "test_Dynamic3.drl" ) );
        builder = new PackageBuilder();
        builder.addPackageFromDrl( reader );
        final Package pkg3 = serialisePackage( builder.getPackage() );
        ruleBase.addPackage( pkg3 );


        // Package 3 has a rule working on Person instances.
        // As we added person instance in advance, rule should fire now       


        Assert.assertEquals( "Rule from package 3 should have been fired",
                             "match Person ok",
                             bob.getStatus() );


        assertEquals( 1,
                      list.size() );


        assertEquals( bob,
                      list.get( 0 ) );


        reader = new InputStreamReader( getClass().getResourceAsStream( "test_Dynamic4.drl" ) );
        builder = new PackageBuilder();
        builder.addPackageFromDrl( reader );
        final Package pkg4 = serialisePackage( builder.getPackage() );
        ruleBase.addPackage( pkg4 );


        Assert.assertEquals( "Rule from package 4 should have been fired",
                             "Who likes Stilton ok",
                             bob.getStatus() );

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    }


    public void testDynamicRuleRemovals() throws Exception {


        final PackageBuilder builder = new PackageBuilder();
        builder.addPackageFromDrl( new InputStreamReader( getClass().getResourceAsStream( "test_Dynamic1.drl" ) ) );
        builder.addPackageFromDrl( new InputStreamReader( getClass().getResourceAsStream( "test_Dynamic3.drl" ) ) );
        builder.addPackageFromDrl( new InputStreamReader( getClass().getResourceAsStream( "test_Dynamic4.drl" ) ) );
        final Package pkg = serialisePackage( builder.getPackage() );


        org.drools.reteoo.ReteooRuleBase reteooRuleBase = null;
        // org.drools.leaps.LeapsRuleBase leapsRuleBase = null;
        final RuleBase ruleBase = getRuleBase();
        reteooRuleBase = (org.drools.reteoo.ReteooRuleBase) ruleBase;
        ruleBase.addPackage( pkg );
        final PackageBuilder builder2 = new PackageBuilder();
        builder2.addPackageFromDrl( new InputStreamReader( getClass().getResourceAsStream( "test_Dynamic2.drl" ) ) );
        ruleBase.addPackage( serialisePackage( builder2.getPackage() ) );


        final WorkingMemory workingMemory = ruleBase.newStatefulSession();


        final List list = new ArrayList();
        workingMemory.setGlobal( "list",

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    public void testSimpleExpression() {
        final Package pkg = new Package( "pkg1" );
        final RuleDescr ruleDescr = new RuleDescr( "rule 1" );


        PackageBuilder pkgBuilder = new PackageBuilder( pkg );
        final PackageBuilderConfiguration conf = pkgBuilder.getPackageBuilderConfiguration();
        MVELDialect mvelDialect = ( MVELDialect ) pkgBuilder.getDialectRegistry().getDialect( "mvel" );


        final InstrumentedBuildContent context = new InstrumentedBuildContent( conf,
                                                                               pkg,
                                                                               ruleDescr,
                                                                               pkgBuilder.getDialectRegistry(),
                                                                               mvelDialect );


        final InstrumentedDeclarationScopeResolver declarationResolver = new InstrumentedDeclarationScopeResolver();
        final FieldExtractor extractor = cache.getExtractor( Cheese.class,
                                                             "price",

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org.drools.base.ClassFieldAccessor

org.drools.base.ClassFieldAccessorCache

org.drools.base.ClassFieldAccessorStore

org.drools.base.evaluators.TimeIntervalParser

org.drools.base.TypeResolver

org.drools.builder.conf.impl.JaxbConfigurationImpl

org.drools.builder.conf.PropertySpecificOption

org.drools.builder.DecisionTableConfiguration

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org.drools.builder.impl.KnowledgeBuilderProviderImpl

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