Package org.drools.lang.descr

Examples of org.drools.lang.descr.FromDescr

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                        final String localName,
                        final Attributes attrs,
                        final ExtensibleXmlParser parser) throws SAXException {
        parser.startElementBuilder( localName,
                                    attrs );
        final FromDescr fromDesctiptor = new FromDescr();
        return fromDesctiptor;
    }
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    public Object end(final String uri,
                      final String localName,
                      final ExtensibleXmlParser parser) throws SAXException {
        final Element element = parser.endElementBuilder();

        final FromDescr fromDescr = (FromDescr) parser.getCurrent();

        Object parent = parser.getParent();

        final PatternDescr patternDescr = (PatternDescr) parent;
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        super( parent.getDescr() );
        this.parent = parent;
    }

    public P expression( String expression ) {
        FromDescr from = new FromDescr();
        from.setDataSource( new MVELExprDescr( expression ) );
        descr.setSource( from );
        return parent;
    }
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    }

    public RuleConditionElement build(final RuleBuildContext context,
                                      final BaseDescr descr,
                                      final Pattern prefixPattern) {
        final FromDescr fromDescr = (FromDescr) descr;

        final MVELExprDescr expr = (MVELExprDescr) fromDescr.getDataSource();
        From from = null;
        try {
            // This builder is re-usable in other dialects, so specify by name
            MVELDialect dialect = (MVELDialect) context.getDialect( "mvel" );
           
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    public void testSimpleMethodCallWithFrom() throws Exception {

        final RuleDescr rule = parseResource( "test_SimpleMethodCallWithFrom.drl" ).rule();
        final PatternDescr pattern = (PatternDescr) rule.getLhs().getDescrs().get( 0 );
        final FromDescr from = (FromDescr) pattern.getSource();
        final AccessorDescr method = (AccessorDescr) from.getDataSource();

        assertFalse( this.parser.getErrorMessages().toString(),
                     this.parser.hasErrors() );

        assertEquals( "something.doIt( foo,bar,42,\"hello\",{ a => \"b\", \"something\" => 42, \"a\" => foo, x => {x=>y}},\"end\", [a, \"b\", 42] )",
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    public void testSimpleFunctionCallWithFrom() throws Exception {

        final RuleDescr rule = parseResource( "test_SimpleFunctionCallWithFrom.drl" ).rule();
        final PatternDescr pattern = (PatternDescr) rule.getLhs().getDescrs().get( 0 );
        final FromDescr from = (FromDescr) pattern.getSource();
        final AccessorDescr func = (AccessorDescr) from.getDataSource();

        assertFalse( this.parser.getErrorMessages().toString(),
                     this.parser.hasErrors() );

        assertEquals( "doIt( foo,bar,42,\"hello\",{ a => \"b\", \"something\" => 42, \"a\" => foo, x => {x=>y}},\"end\", [a, \"b\", 42] )",
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    public void testSimpleAccessorWithFrom() throws Exception {

        final RuleDescr rule = parseResource( "test_SimpleAccessorWithFrom.drl" ).rule();
        final PatternDescr pattern = (PatternDescr) rule.getLhs().getDescrs().get( 0 );
        final FromDescr from = (FromDescr) pattern.getSource();
        final AccessorDescr accessor = (AccessorDescr) from.getDataSource();

        assertFalse( this.parser.getErrorMessages().toString(),
                     this.parser.hasErrors() );

        assertNull( ((FieldAccessDescr) accessor.getInvokers().get( 0 )).getArgument() );
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    public void testSimpleAccessorAndArgWithFrom() throws Exception {

        final RuleDescr rule = parseResource( "test_SimpleAccessorArgWithFrom.drl" ).rule();
        final PatternDescr pattern = (PatternDescr) rule.getLhs().getDescrs().get( 0 );
        final FromDescr from = (FromDescr) pattern.getSource();
        final AccessorDescr accessor = (AccessorDescr) from.getDataSource();

        assertFalse( this.parser.getErrorMessages().toString(),
                     this.parser.hasErrors() );

        assertNotNull( ((FieldAccessDescr) accessor.getInvokers().get( 0 )).getArgument() );
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    }

    public void testComplexChainedAcessor() throws Exception {
        final RuleDescr rule = parseResource( "test_ComplexChainedCallWithFrom.drl" ).rule();
        final PatternDescr pattern = (PatternDescr) rule.getLhs().getDescrs().get( 0 );
        final FromDescr from = (FromDescr) pattern.getSource();
        final AccessorDescr accessor = (AccessorDescr) from.getDataSource();

        assertFalse( this.parser.getErrorMessages().toString(),
                     this.parser.hasErrors() );

        assertEquals( "doIt1( foo,bar,42,\"hello\",{ a => \"b\"}, [a, \"b\", 42] ).doIt2(bar, [a, \"b\", 42]).field[\"key\"]",
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        final PackageDescr packageDescr = xmlPackageReader.getPackageDescr();
        assertNotNull( packageDescr );
        RuleDescr obj = (RuleDescr) packageDescr.getRules().get( 0 );
        PatternDescr patterndescr = (PatternDescr) obj.getLhs().getDescrs().get( 0 );
       
        FromDescr from = (FromDescr) patterndescr.getSource();
       
        AccessorDescr accessordescriptor =  (AccessorDescr) from.getDataSource();
        assertEquals( accessordescriptor.getVariableName(), "cheesery" );

        assertEquals( patterndescr.getObjectType(), "Cheese" );
        assertEquals( patterndescr.getIdentifier(), "cheese" );
       
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Related Classes of org.drools.lang.descr.FromDescr

  • org.drools.compiler.xml.rules.ExpressionHandler
  • org.drools.compiler.xml.rules.FromHandler
  • org.drools.compiler.xml.rules.XmlPackageReaderTest
  • org.drools.lang.api.impl.SourceDescrBuilderImpl
  • org.drools.lang.api.SourceDescrBuilderImpl
  • org.drools.lang.RuleParserTest
  • org.drools.rule.builder.dialect.mvel.MVELFromBuilder
  • org.drools.xml.ExpressionHandler
  • org.drools.xml.FromHandler
  • org.drools.xml.rules.ExpressionHandler
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