Package org.drools.lang.descr

Examples of org.drools.lang.descr.FunctionDescr

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        final RuleDescr rule = (RuleDescr) pkg.getRules().get( 0 );

        assertEqualsIgnoreWhitespace( "yourFunction(new String[3] {\"a\",\"b\",\"c\"});",
                                      (String) rule.getConsequence() );
        final FunctionDescr func = (FunctionDescr) pkg.getFunctions().get( 0 );

        assertEquals( "String[]",
                      func.getReturnType() );
        assertEquals( "args[]",
                      func.getParameterNames().get( 0 ) );
        assertEquals( "String",
                      func.getParameterTypes().get( 0 ) );
    }
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        final List functions = pack.getFunctions();
        assertEquals( 2,
                      functions.size() );

        FunctionDescr func = (FunctionDescr) functions.get( 0 );
        assertEquals( "functionA",
                      func.getName() );
        assertEquals( "String",
                      func.getReturnType() );
        assertEquals( 2,
                      func.getParameterNames().size() );
        assertEquals( 2,
                      func.getParameterTypes().size() );
        assertEquals( 4,
                      func.getLine() );
        assertEquals( 0,
                      func.getColumn() );

        assertEquals( "String",
                      func.getParameterTypes().get( 0 ) );
        assertEquals( "s",
                      func.getParameterNames().get( 0 ) );

        assertEquals( "Integer",
                      func.getParameterTypes().get( 1 ) );
        assertEquals( "i",
                      func.getParameterNames().get( 1 ) );

        assertEqualsIgnoreWhitespace( "foo();",
                                      func.getText() );

        func = (FunctionDescr) functions.get( 1 );
        assertEquals( "functionB",
                      func.getName() );
        assertEqualsIgnoreWhitespace( "bar();",
                                      func.getText() );

        assertFalse( parser.hasErrors() );
    }
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        // only try to compile if there are no parse errors
        if ( !hasErrors() ) {
            if ( !packageDescr.getFunctions().isEmpty() ) {

                for ( final Iterator it = packageDescr.getFunctions().iterator(); it.hasNext(); ) {
                    FunctionDescr functionDescr = (FunctionDescr) it.next();
                    if ( isEmpty( functionDescr.getNamespace() ) ) {
                        // make sure namespace is set on components
                        functionDescr.setNamespace( packageDescr.getNamespace() );
                    }
                    if ( isEmpty( functionDescr.getDialect() ) ) {
                        // make sure namespace is set on components
                        functionDescr.setDialect( pkgRegistry.getDialect() );
                    }
                    preCompileAddFunction( functionDescr );
                }

                // iterate and compile
                for ( final Iterator it = packageDescr.getFunctions().iterator(); it.hasNext(); ) {
                    // inherit the dialect from the package
                    FunctionDescr functionDescr = (FunctionDescr) it.next();
                    addFunction( functionDescr );
                }

                // We need to compile all the functions now, so scripting
                // languages like mvel can find them
                compileAll();

                for ( final Iterator it = packageDescr.getFunctions().iterator(); it.hasNext(); ) {
                    FunctionDescr functionDescr = (FunctionDescr) it.next();
                    postCompileAddFunction( functionDescr );
                }
            }

            // iterate and compile
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        final String returnType = attrs.getValue( "return-type" );
       
        emptyAttributeCheck( localName, "name", name, parser );
        emptyAttributeCheck( localName, "return-type", returnType, parser );

        return new FunctionDescr( name, returnType );
    }
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    public Object end(final String uri,
                      final String localName,
                      final ExtensibleXmlParser parser) throws SAXException {
        final Element element = parser.endElementBuilder();

        FunctionDescr functionDescr = ( FunctionDescr ) parser.getCurrent();

        final NodeList parameters = element.getElementsByTagName( "parameter" );

        for ( int i = 0, length = parameters.getLength(); i < length; i++ ) {
            final String identifier = ((Element)parameters.item( i )).getAttribute( "identifier" );
            final String type = ((Element)parameters.item( i )).getAttribute( "type" );
           
            emptyAttributeCheck("parameter", "identifier", identifier, parser);
            emptyAttributeCheck("parameter", "type", type, parser);
           
            functionDescr.addParameter( type,
                                        identifier );
        }

        // we allow empty, "", bodies - but make sure that we atleast have a body element
             
        NodeList list = element.getElementsByTagName( "body" );
        if ( list.getLength() == 0 ) {
            throw new SAXParseException( "function must have a <body>",
                                         parser.getLocator() );

        }

       
       
        functionDescr.setText( ((org.w3c.dom.Text)list.item( 0 ).getChildNodes().item( 0 )).getWholeText() );

        final PackageDescr packageDescr = (PackageDescr) parser.getData();

        packageDescr.addFunction( functionDescr );
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        return findClass(className, imports, packageBuilder.getRootClassLoader());
    }

    private static Class<?> findFunctionReturnedClass(RuleBuildContext context, String statement) {
        String functionName = statement.substring(0, statement.indexOf('('));
        FunctionDescr function = lookupFunction(context, functionName);
        return function == null ? null : findClassByName(context, function.getReturnType());
    }
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public class FunctionDescrBuilderImpl extends BaseDescrBuilderImpl<PackageDescrBuilder, FunctionDescr>
    implements
    FunctionDescrBuilder {

    protected FunctionDescrBuilderImpl( PackageDescrBuilder parent ) {
        super( parent, new FunctionDescr() );
    }
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        packageDescr.addImport( new ImportDescr( "java.util.SortedSet" ) );
        packageDescr.addImport( new ImportDescr( "java.util.TreeSet" ) );
    }

    private static void addFunctions(PackageDescr packageDescr) {
        FunctionDescr functionDescr = new FunctionDescr( "foo",
                                                         "void" );
        functionDescr.addParameter( "String",
                                    "arg1" );
        String body = "Set myHashSet = new HashSet();" + "myHashSet.add(arg1);" + "List myArrayList = new ArrayList();" + "myArrayList.add(arg1);" + "List myLinkedList = new LinkedList();" + "myLinkedList.add(arg1);"
                      + "Set myTreeSet = new TreeSet();" + "myTreeSet.add(arg1);";
        functionDescr.setText( body );
        packageDescr.addFunction( functionDescr );
    }
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        assertEquals( "com.sample.Yada",
                      yada.getType() );
        assertEquals( "yada",
                      yada.getIdentifier() );

        final FunctionDescr functionDescr = (FunctionDescr) packageDescr.getFunctions().get( 0 );
        final List names = functionDescr.getParameterNames();
        assertEquals( "foo",
                      names.get( 0 ) );
        assertEquals( "bada",
                      names.get( 1 ) );

        final List types = functionDescr.getParameterTypes();
        assertEquals( "Bar",
                      types.get( 0 ) );
        assertEquals( "Bing",
                      types.get( 1 ) );

        assertEquals( "System.out.println(\"hello world\");",
                      functionDescr.getText().trim() );
    }
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        assertEquals( "com.sample.Yada",
                      yada.getType() );
        assertEquals( "yada",
                      yada.getIdentifier() );

        final FunctionDescr functionDescr = (FunctionDescr) packageDescr.getFunctions().get( 0 );
        final List names = functionDescr.getParameterNames();
        assertEquals( "foo",
                      names.get( 0 ) );
        assertEquals( "bada",
                      names.get( 1 ) );

        final List types = functionDescr.getParameterTypes();
        assertEquals( "Bar",
                      types.get( 0 ) );
        assertEquals( "Bing",
                      types.get( 1 ) );

        assertEquals( "System.out.println(\"hello world\");",
                      functionDescr.getText().trim() );

        final RuleDescr ruleDescr = (RuleDescr) packageDescr.getRules().get( 0 );
        assertEquals( "my rule",
                      ruleDescr.getName() );
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Related Classes of org.drools.lang.descr.FunctionDescr

  • org.drools.clips.FunctionHandlers
  • org.drools.compiler.PackageBuilder
  • org.drools.compiler.xml.rules.FunctionHandler
  • org.drools.compiler.xml.rules.XmlPackageReaderTest
  • org.drools.eclipse.editors.DescrUtil
  • org.drools.eclipse.view.rules.RulesView
  • org.drools.integrationtests.PackageBuilderThreadSafetyTest
  • org.drools.lang.api.FunctionDescrBuilderImpl
  • org.drools.lang.api.impl.FunctionDescrBuilderImpl
  • org.drools.lang.RuleParserTest
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