Package org.drools.lang.descr

Examples of org.drools.lang.descr.EvalDescr

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        RuleDescr ruleDescr = new RuleDescr( "test rule" );
        ruleDescr.addAttribute( new AttributeDescr( "dialect",
                                                    "mock" ) );
        ruleDescr.setLhs( new AndDescr() );
        EvalDescr evalDescr = new EvalDescr();
        ruleDescr.getLhs().addDescr( evalDescr );

        PackageDescr pkgDescr = new PackageDescr( "org.pkg1" );
        pkgDescr.addImport( new ImportDescr( "java.util.HashMap" ) );
        FunctionImportDescr functionImportDescr = new FunctionImportDescr();
        functionImportDescr.setTarget( "java.lang.System.currentTimeMillis" );
        pkgDescr.addFunctionImport( functionImportDescr );

        pkgDescr.addRule( ruleDescr );

        builder.addPackage( pkgDescr );

        assertSame( ruleDescr,
                    mockDialect2.getRuleDescr() );
        assertTrue( mockDialect2.getImport().contains( "java.util.HashMap" ) );
        assertTrue( mockDialect2.getStaticImport().contains( "java.lang.System.currentTimeMillis" ) );
        assertEquals( "eval was built",
                      evalDescr.getContent() );
        assertEquals( "consequence was built",
                      ruleDescr.getConsequence() );
        assertTrue( mockDialect2.isCompileAll() );

        assertNotNull( pkg.getRule( "test rule" ) );
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        AndDescr lhs = rule.getLhs();
        List lhsList = lhs.getDescrs();
        assertEquals( 1,
                      lhsList.size() );

        EvalDescr evalDescr = (EvalDescr) lhsList.get( 0 );
        LispForm lispForm = ( LispForm ) evalDescr.getContent();
        assertEquals("(< 9.0 1.3)", lispForm.toString() );                         
    }
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        AndDescr lhs = rule.getLhs();
        List lhsList = lhs.getDescrs();
        assertEquals( 1,
                      lhsList.size() );

        EvalDescr evalDescr = (EvalDescr) lhsList.get( 0 );
        LispForm lispForm = ( LispForm ) evalDescr.getContent();
        assertEquals("(< 9.0 1.3)", lispForm.toString() );
    }
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                      pkg.getRules().size() );
        final RuleDescr rule = (RuleDescr) pkg.getRules().get( 0 );
        assertEquals( 4,
                      rule.getLhs().getDescrs().size() );

        final EvalDescr eval = (EvalDescr) rule.getLhs().getDescrs().get( 0 );
        assertEqualsIgnoreWhitespace( "abc(\"foo\") + 5",
                                      (String) eval.getContent() );

        final PatternDescr pattern = (PatternDescr) rule.getLhs().getDescrs().get( 1 );
        assertEquals( "Foo",
                      pattern.getObjectType() );
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                      pattern.getObjectType() );
        pattern = (PatternDescr) rule.getLhs().getDescrs().get( 1 );
        assertEquals( "Bar",
                      pattern.getObjectType() );

        final EvalDescr eval = (EvalDescr) rule.getLhs().getDescrs().get( 2 );
        assertEqualsIgnoreWhitespace( "abc(\"foo\")",
                                      (String) eval.getContent() );
        assertEqualsIgnoreWhitespace( "Kapow",
                                      (String) rule.getConsequence() );
    }
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        AndDescr lhs = rule.getLhs();
        List lhsList = lhs.getDescrs();
        assertEquals( 1,
                      lhsList.size() );

        EvalDescr evalDescr = (EvalDescr) lhsList.get( 0 );
        LispForm lispForm = ( LispForm ) evalDescr.getContent();
        assertEquals("(< 9.0 1.3)", lispForm.toString() );                         
    }
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     */
    public RuleConditionElement build(final RuleBuildContext context,
                                      final BaseDescr descr,
                                      final Pattern prefixPattern) {
        // it must be an EvalDescr
        final EvalDescr evalDescr = (EvalDescr) descr;

        try {
            final DroolsMVELFactory factory = new DroolsMVELFactory( context.getDeclarationResolver().getDeclarations(),
                                                                     null,
                                                                     context.getPkg().getGlobals() );

            Dialect.AnalysisResult analysis = context.getDialect().analyzeExpression( context,
                                                                                      evalDescr,
                                                                                      evalDescr.getContent() );
            final List[] usedIdentifiers = analysis.getBoundIdentifiers();

            final Declaration[] declarations = new Declaration[usedIdentifiers[0].size()];
            for ( int i = 0, size = usedIdentifiers[0].size(); i < size; i++ ) {
                declarations[i] = context.getDeclarationResolver().getDeclaration( (String) usedIdentifiers[0].get( i ) );
            }

            final EvalCondition eval = new EvalCondition( declarations );

            Serializable expr = ((MVELDialect) context.getDialect()).compile( (String) evalDescr.getContent(),
                                                                              analysis,
                                                                              null,
                                                                              null,
                                                                              context );

            eval.setEvalExpression( new MVELEvalExpression( expr,
                                                            factory ) );

            return eval;
        } catch ( final Exception e ) {
            context.getErrors().add( new RuleError( context.getRule(),
                                                    evalDescr,
                                                    e,
                                                    "Unable to build expression for 'eval' node '" + evalDescr.getContent() + "'" ) );
            return null;
        }
    }
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                      pkg.getRules().size() );
        final RuleDescr rule = (RuleDescr) pkg.getRules().get( 0 );
        assertEquals( 4,
                      rule.getLhs().getDescrs().size() );

        final EvalDescr eval = (EvalDescr) rule.getLhs().getDescrs().get( 0 );
        assertEqualsIgnoreWhitespace( "abc(\"foo\") + 5",
                                      (String) eval.getContent() );

        final PatternDescr pattern = (PatternDescr) rule.getLhs().getDescrs().get( 1 );
        assertEquals( "Foo",
                      pattern.getObjectType() );
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                      pattern.getObjectType() );
        pattern = (PatternDescr) rule.getLhs().getDescrs().get( 1 );
        assertEquals( "Bar",
                      pattern.getObjectType() );

        final EvalDescr eval = (EvalDescr) rule.getLhs().getDescrs().get( 2 );
        assertEqualsIgnoreWhitespace( "abc(\"foo\")",
                                      (String) eval.getContent() );
        assertEqualsIgnoreWhitespace( "Kapow",
                                      (String) rule.getConsequence() );
    }
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     */
    public RuleConditionElement build(final RuleBuildContext context,
                                      final BaseDescr descr,
                                      final Pattern prefixPattern) {
        // it must be an EvalDescr
        final EvalDescr evalDescr = (EvalDescr) descr;

        try {
            final DroolsMVELFactory factory = new DroolsMVELFactory( context.getDeclarationResolver().getDeclarations(),
                                                                     null,
                                                                     context.getPkg().getGlobals() );
            factory.setNextFactory( ((MVELDialect) context.getDialect()).getStaticMethodImportResolverFactory() );

            Dialect.AnalysisResult analysis = context.getDialect().analyzeExpression( context,
                                                                                      evalDescr,
                                                                                      evalDescr.getContent() );
            final List[] usedIdentifiers = analysis.getBoundIdentifiers();

            final Declaration[] declarations = new Declaration[usedIdentifiers[0].size()];
            for ( int i = 0, size = usedIdentifiers[0].size(); i < size; i++ ) {
                declarations[i] = context.getDeclarationResolver().getDeclaration( (String) usedIdentifiers[0].get( i ) );
            }

            final EvalCondition eval = new EvalCondition( declarations );

            Serializable expr = ((MVELDialect) context.getDialect()).compile( (String) evalDescr.getContent(),
                                                                              analysis,
                                                                              null,
                                                                              null,
                                                                              context );

            eval.setEvalExpression( new MVELEvalExpression( expr,
                                                            factory ) );

            return eval;
        } catch ( final Exception e ) {
            context.getErrors().add( new RuleError( context.getRule(),
                                                    evalDescr,
                                                    e,
                                                    "Unable to build expression for 'eval' node '" + evalDescr.getContent() + "'" ) );
            return null;
        }
    }
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Related Classes of org.drools.lang.descr.EvalDescr

  • org.drools.clips.LhsClpParserTest
  • org.drools.compiler.PackageBuilderConfigurationTest
  • org.drools.compiler.PackageBuilderConfigurationTest$MockEvalBuilder
  • org.drools.compiler.PackageBuilderTest
  • org.drools.compiler.xml.rules.EvalHandler
  • org.drools.compiler.xml.rules.XmlPackageReaderTest
  • org.drools.lang.api.EvalDescrBuilderImpl
  • org.drools.lang.api.impl.EvalDescrBuilderImpl
  • org.drools.lang.RuleParserTest
  • org.drools.rule.builder.dialect.asm.AbstractASMEvalBuilder
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