private void fromAccumulate()

in drools-drl/drools-drl-parser/src/main/java/org/drools/drl/parser/lang/DRL5Parser.java [3671:3845]
151 lines of code
43 McCabe index (conditional complexity)

    private void fromAccumulate( PatternDescrBuilder< ? > pattern ) throws RecognitionException {
        AccumulateDescrBuilder< ? > accumulate = helper.start( pattern,
                                                               AccumulateDescrBuilder.class,
                                                               null );
        try {
            match( input,
                   DRL5Lexer.ID,
                   DroolsSoftKeywords.ACCUMULATE,
                   null,
                   DroolsEditorType.KEYWORD );
            if ( state.failed ) return;

            if ( state.backtracking == 0 && input.LA( 1 ) != DRL5Lexer.EOF ) {
                helper.emit( Location.LOCATION_LHS_FROM_ACCUMULATE );
            }
            match( input,
                   DRL5Lexer.LEFT_PAREN,
                   null,
                   null,
                   DroolsEditorType.SYMBOL );
            if ( state.failed ) return;

            CEDescrBuilder< ? , AndDescr> source = accumulate.source();
            try {
                helper.start( source,
                              CEDescrBuilder.class,
                              null );
                lhsAnd( source,
                        false );
                if ( state.failed ) return;

                if ( source.getDescr() != null && source.getDescr() instanceof ConditionalElementDescr ) {
                    ConditionalElementDescr root = source.getDescr();
                    BaseDescr[] descrs = root.getDescrs().toArray( new BaseDescr[root.getDescrs().size()] );
                    root.getDescrs().clear();
                    for ( int i = 0; i < descrs.length; i++ ) {
                        root.addOrMerge( descrs[i] );
                    }
                }
            } finally {
                helper.end( CEDescrBuilder.class,
                            source );
            }

            if ( input.LA( 1 ) == DRL5Lexer.COMMA ) {
                match( input,
                       DRL5Lexer.COMMA,
                       null,
                       null,
                       DroolsEditorType.SYMBOL );
                if ( state.failed ) return;
            }

            if ( helper.validateIdentifierKey( DroolsSoftKeywords.INIT ) ) {
                // custom code, inline accumulate

                // initBlock
                match( input,
                       DRL5Lexer.ID,
                       DroolsSoftKeywords.INIT,
                       null,
                       DroolsEditorType.KEYWORD );
                if ( state.failed ) return;
                if ( state.backtracking == 0 && input.LA( 1 ) != DRL5Lexer.EOF ) {
                    helper.emit( Location.LOCATION_LHS_FROM_ACCUMULATE_INIT );
                }

                String init = chunk( DRL5Lexer.LEFT_PAREN,
                                     DRL5Lexer.RIGHT_PAREN,
                                     Location.LOCATION_LHS_FROM_ACCUMULATE_INIT_INSIDE );
                if ( state.failed ) return;
                if ( state.backtracking == 0 ) accumulate.init( init );

                if ( input.LA( 1 ) == DRL5Lexer.COMMA ) {
                    match( input,
                           DRL5Lexer.COMMA,
                           null,
                           null,
                           DroolsEditorType.SYMBOL );
                    if ( state.failed ) return;
                }

                // actionBlock
                match( input,
                       DRL5Lexer.ID,
                       DroolsSoftKeywords.ACTION,
                       null,
                       DroolsEditorType.KEYWORD );
                if ( state.failed ) return;
                if ( state.backtracking == 0 && input.LA( 1 ) != DRL5Lexer.EOF ) {
                    helper.emit( Location.LOCATION_LHS_FROM_ACCUMULATE_ACTION );
                }

                String action = chunk( DRL5Lexer.LEFT_PAREN,
                                       DRL5Lexer.RIGHT_PAREN,
                                       Location.LOCATION_LHS_FROM_ACCUMULATE_ACTION_INSIDE );
                if ( state.failed ) return;
                if ( state.backtracking == 0 ) accumulate.action( action );

                if ( input.LA( 1 ) == DRL5Lexer.COMMA ) {
                    match( input,
                           DRL5Lexer.COMMA,
                           null,
                           null,
                           DroolsEditorType.SYMBOL );
                    if ( state.failed ) return;
                }

                // reverseBlock
                if ( helper.validateIdentifierKey( DroolsSoftKeywords.REVERSE ) ) {
                    match( input,
                           DRL5Lexer.ID,
                           DroolsSoftKeywords.REVERSE,
                           null,
                           DroolsEditorType.KEYWORD );
                    if ( state.failed ) return;
                    if ( state.backtracking == 0 && input.LA( 1 ) != DRL5Lexer.EOF ) {
                        helper.emit( Location.LOCATION_LHS_FROM_ACCUMULATE_REVERSE );
                    }

                    String reverse = chunk( DRL5Lexer.LEFT_PAREN,
                                            DRL5Lexer.RIGHT_PAREN,
                                            Location.LOCATION_LHS_FROM_ACCUMULATE_REVERSE_INSIDE );
                    if ( state.failed ) return;
                    if ( state.backtracking == 0 ) accumulate.reverse( reverse );

                    if ( input.LA( 1 ) == DRL5Lexer.COMMA ) {
                        match( input,
                               DRL5Lexer.COMMA,
                               null,
                               null,
                               DroolsEditorType.SYMBOL );
                        if ( state.failed ) return;
                    }
                }

                // resultBlock
                match( input,
                       DRL5Lexer.ID,
                       DroolsSoftKeywords.RESULT,
                       null,
                       DroolsEditorType.KEYWORD );
                if ( state.failed ) return;

                if ( state.backtracking == 0 && input.LA( 1 ) != DRL5Lexer.EOF ) {
                    helper.emit( Location.LOCATION_LHS_FROM_ACCUMULATE_RESULT );
                }

                String result = chunk( DRL5Lexer.LEFT_PAREN,
                                       DRL5Lexer.RIGHT_PAREN,
                                       Location.LOCATION_LHS_FROM_ACCUMULATE_RESULT_INSIDE );
                if ( state.failed ) return;
                if ( state.backtracking == 0 ) accumulate.result( result );
            } else {
                // accumulate functions
                accumulateFunction( accumulate,
                                    false,
                                    null );
                if ( state.failed ) return;
            }

            match( input,
                   DRL5Lexer.RIGHT_PAREN,
                   null,
                   null,
                   DroolsEditorType.SYMBOL );
            if ( state.failed ) return;
        } finally {
            helper.end( AccumulateDescrBuilder.class,
                        accumulate );
            if ( state.backtracking == 0 && input.LA( 1 ) != DRL5Lexer.EOF ) {
                helper.emit( Location.LOCATION_LHS_BEGIN_OF_CONDITION );
            }
        }
    }