Package org.drools.compiler.lang.descr

Examples of org.drools.compiler.lang.descr.ConstraintConnectiveDescr

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          pushFollow(FOLLOW_inclusiveOrExpression_in_conditionalAndExpression1219);
          right=inclusiveOrExpression();
          state._fsp--;
          if (state.failed) return result;
          if ( state.backtracking==0 ) { if( buildDescr  ) {
                         ConstraintConnectiveDescr descr = ConstraintConnectiveDescr.newAnd();
                         descr.addOrMerge( result );
                         descr.addOrMerge( right );
                         if ( args != null ) { descr.addAnnotation( args ); }
                         result = descr;
                     }
                   }
          }
          break;
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        super.tearDown();
    }

    public void testSimpleExpression() throws Exception {
        String source = "a > b";
        ConstraintConnectiveDescr result = parser.parse( source );
        assertFalse( parser.getErrors().toString(),
                     parser.hasErrors() );

        assertEquals( ConnectiveType.AND,
                      result.getConnective() );
        assertEquals( 1,
                      result.getDescrs().size() );

        RelationalExprDescr expr = (RelationalExprDescr) result.getDescrs().get( 0 );
        assertEquals( ">",
                      expr.getOperator() );

        AtomicExprDescr left = (AtomicExprDescr) expr.getLeft();
        AtomicExprDescr right = (AtomicExprDescr) expr.getRight();
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                      right.getExpression() );
    }

    public void testAndConnective() throws Exception {
        String source = "a > b && 10 != 20";
        ConstraintConnectiveDescr result = parser.parse( source );
        assertFalse( parser.getErrors().toString(),
                     parser.hasErrors() );

        assertEquals( ConnectiveType.AND,
                      result.getConnective() );
        assertEquals( 2,
                      result.getDescrs().size() );

        RelationalExprDescr expr = (RelationalExprDescr) result.getDescrs().get( 0 );
        assertEquals( ">",
                      expr.getOperator() );
        AtomicExprDescr left = (AtomicExprDescr) expr.getLeft();
        AtomicExprDescr right = (AtomicExprDescr) expr.getRight();
        assertEquals( "a",
                      left.getExpression() );
        assertEquals( "b",
                      right.getExpression() );

        expr = (RelationalExprDescr) result.getDescrs().get( 1 );
        assertEquals( "!=",
                      expr.getOperator() );
        left = (AtomicExprDescr) expr.getLeft();
        right = (AtomicExprDescr) expr.getRight();
        assertEquals( "10",
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                      right.getExpression() );
    }

    public void testConnective2() throws Exception {
        String source = "(a > b || 10 != 20) && someMethod(10) == 20";
        ConstraintConnectiveDescr result = parser.parse( source );
        assertFalse( parser.getErrors().toString(),
                     parser.hasErrors() );

        assertEquals( ConnectiveType.AND,
                      result.getConnective() );
        assertEquals( 2,
                      result.getDescrs().size() );

        ConstraintConnectiveDescr or = (ConstraintConnectiveDescr) result.getDescrs().get( 0 );
        assertEquals( ConnectiveType.OR,
                      or.getConnective() );
        assertEquals( 2,
                      or.getDescrs().size() );

        RelationalExprDescr expr = (RelationalExprDescr) or.getDescrs().get( 0 );
        assertEquals( ">",
                      expr.getOperator() );
        AtomicExprDescr left = (AtomicExprDescr) expr.getLeft();
        AtomicExprDescr right = (AtomicExprDescr) expr.getRight();
        assertEquals( "a",
                      left.getExpression() );
        assertEquals( "b",
                      right.getExpression() );

        expr = (RelationalExprDescr) or.getDescrs().get( 1 );
        assertEquals( "!=",
                      expr.getOperator() );
        left = (AtomicExprDescr) expr.getLeft();
        right = (AtomicExprDescr) expr.getRight();
        assertEquals( "10",
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        this.languageLevel = languageLevel;
    }

    /** Parse an expression from text */
    public ConstraintConnectiveDescr parse( final String text ) {
        ConstraintConnectiveDescr constraint = null;
        try {
            DRLLexer lexer = DRLFactory.getDRLLexer(new ANTLRStringStream(text), languageLevel);
            CommonTokenStream input = new CommonTokenStream( lexer );
            RecognizerSharedState state = new RecognizerSharedState();
            helper = new ParserHelper( input, state, languageLevel );
            DRLExpressions parser = DRLFactory.getDRLExpressions(input, state, helper, languageLevel);
            parser.setBuildDescr( true );
            parser.setLeftMostExpr( null ); // setting initial value just in case
            BaseDescr expr = parser.conditionalOrExpression();
            if ( expr != null && !parser.hasErrors() ) {
                constraint = ConstraintConnectiveDescr.newAnd();
                constraint.addOrMerge( expr );
            }
        } catch ( RecognitionException e ) {
            helper.reportError( e );
        }
        return constraint;
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                isPositional = descr.getType() == ExprConstraintDescr.Type.POSITIONAL;
            } else {
                expression = b.getText();
            }

            ConstraintConnectiveDescr result = parseExpression( context,
                                                                patternDescr,
                                                                b,
                                                                expression );
            if ( result == null ) {
                return;
            }

            isPositional &= !( result.getDescrs().size() == 1 && result.getDescrs().get( 0 ) instanceof BindingDescr );

            if ( isPositional ) {
                processPositional(context,
                                  patternDescr,
                                  pattern,
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    protected void build( final RuleBuildContext context,
                        final PatternDescr patternDescr,
                        final Pattern pattern,
                        final BaseDescr original,
                        final String expr ) {
        ConstraintConnectiveDescr result = parseExpression( context,
                                                            patternDescr,
                                                            original,
                                                            expr );
        if ( result == null ) {
            return;
        }
        result.copyLocation( original );
        MVELDumper.MVELDumperContext mvelCtx = new MVELDumper.MVELDumperContext().setRuleContext(context);
        build( context,
               patternDescr,
               pattern,
               result,
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    protected ConstraintConnectiveDescr parseExpression( final RuleBuildContext context,
                                                         final PatternDescr patternDescr,
                                                         final BaseDescr original,
                                                         final String expression ) {
        DrlExprParser parser = new DrlExprParser( context.getConfiguration().getLanguageLevel() );
        ConstraintConnectiveDescr result = parser.parse( expression );
        result.copyLocation( original );
        if ( parser.hasErrors() ) {
            for ( DroolsParserException error : parser.getErrors() ) {
                context.addError(new DescrBuildError(context.getParentDescr(),
                        patternDescr,
                        null,
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    @Test
    public void testDump() throws Exception {
        String input = "price > 10 && < 20 || == $val || == 30";
        String expected = "( price > 10 && price < 20 || price == $val || price == 30 )";

        ConstraintConnectiveDescr descr = parse( input );
        String result = dumper.dump( descr );

        assertEquals( expected,
                      result );
    }
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    @Test
    public void testDumpMatches() throws Exception {
        String input = "type.toString matches \"something\\swith\\tsingle escapes\"";
        String expected = "type.toString ~= \"something\\swith\\tsingle escapes\"";

        ConstraintConnectiveDescr descr = parse( input );
        String result = dumper.dump( descr );

        assertEquals( expected,
                      result );
    }
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Related Classes of org.drools.compiler.lang.descr.ConstraintConnectiveDescr

  • org.drools.compiler.compiler.DrlExprParser
  • org.drools.compiler.lang.DRL5Expressions
  • org.drools.compiler.lang.DRL6Expressions
  • org.drools.compiler.lang.DRLExprParserTest
  • org.drools.compiler.lang.MVELDumper
  • org.drools.compiler.lang.MVELDumperTest
  • org.drools.compiler.rule.builder.PatternBuilder
  • org.drools.compiler.rule.builder.QueryElementBuilder
  • org.drools.verifier.visitor.ExprConstraintDescrVisitor
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