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Example 6 with PatternContainerDescrBuilder

use of org.drools.drl.ast.dsl.PatternContainerDescrBuilder in project drools by kiegroup.

the class DRL6Parser method lhsAccumulate.

/**
 * lhsAccumulate := (ACCUMULATE|ACC) LEFT_PAREN lhsAnd (COMMA|SEMICOLON)
 *                      accumulateFunctionBinding (COMMA accumulateFunctionBinding)*
 *                      (SEMICOLON constraints)?
 *                  RIGHT_PAREN SEMICOLON?
 *
 * @param ce
 * @return
 * @throws org.antlr.runtime.RecognitionException
 */
private BaseDescr lhsAccumulate(PatternContainerDescrBuilder<?, ?> ce) throws RecognitionException {
    PatternDescrBuilder<?> pattern = null;
    BaseDescr result = null;
    pattern = helper.start((DescrBuilder<?, ?>) ce, PatternDescrBuilder.class, null);
    if (pattern != null) {
        result = pattern.getDescr();
    }
    try {
        if (state.backtracking == 0) {
            pattern.type("Object");
            pattern.isQuery(false);
        // might have to add the implicit bindings as well
        }
        AccumulateDescrBuilder<?> accumulate = helper.start(pattern, AccumulateDescrBuilder.class, null);
        try {
            if (helper.validateIdentifierKey(DroolsSoftKeywords.ACCUMULATE)) {
                match(input, DRL6Lexer.ID, DroolsSoftKeywords.ACCUMULATE, null, DroolsEditorType.KEYWORD);
            } else {
                // might be using the short mnemonic
                match(input, DRL6Lexer.ID, DroolsSoftKeywords.ACC, null, DroolsEditorType.KEYWORD);
            }
            if (state.failed)
                return null;
            if (state.backtracking == 0 && input.LA(1) != DRL6Lexer.EOF) {
                helper.emit(Location.LOCATION_LHS_FROM_ACCUMULATE);
            }
            match(input, DRL6Lexer.LEFT_PAREN, null, null, DroolsEditorType.SYMBOL);
            if (state.failed)
                return null;
            CEDescrBuilder<?, AndDescr> source = accumulate.source();
            try {
                helper.start(source, CEDescrBuilder.class, null);
                lhsAnd(source, true);
                if (state.failed)
                    return null;
                if (source.getDescr() != null && source.getDescr() instanceof ConditionalElementDescr) {
                    ConditionalElementDescr root = (ConditionalElementDescr) 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) == DRL6Lexer.COMMA) {
                match(input, DRL6Lexer.COMMA, null, null, DroolsEditorType.SYMBOL);
                if (state.failed)
                    return null;
            } else if (input.LA(-1) != DRL6Lexer.SEMICOLON) {
                // lhsUnary will consume an optional SEMICOLON, so we need to check if it was consumed already
                // or if we must fail consuming it now
                match(input, DRL6Lexer.SEMICOLON, null, null, DroolsEditorType.SYMBOL);
                if (state.failed)
                    return null;
            }
            // accumulate functions
            accumulateFunctionBinding(accumulate);
            if (state.failed)
                return null;
            while (input.LA(1) == DRL6Lexer.COMMA) {
                match(input, DRL6Lexer.COMMA, null, null, DroolsEditorType.SYMBOL);
                if (state.failed)
                    return null;
                accumulateFunctionBinding(accumulate);
                if (state.failed)
                    return null;
            }
            if (input.LA(1) == DRL6Lexer.SEMICOLON) {
                match(input, DRL6Lexer.SEMICOLON, null, null, DroolsEditorType.SYMBOL);
                if (state.failed)
                    return null;
                constraints(pattern);
            }
            match(input, DRL6Lexer.RIGHT_PAREN, null, null, DroolsEditorType.SYMBOL);
            if (state.failed)
                return null;
        } finally {
            helper.end(AccumulateDescrBuilder.class, accumulate);
            if (state.backtracking == 0 && input.LA(1) != DRL6Lexer.EOF) {
                helper.emit(Location.LOCATION_LHS_BEGIN_OF_CONDITION);
            }
        }
    } finally {
        helper.end(PatternDescrBuilder.class, pattern);
    }
    if (input.LA(1) == DRL6Lexer.SEMICOLON) {
        match(input, DRL6Lexer.SEMICOLON, null, null, DroolsEditorType.SYMBOL);
        if (state.failed)
            return null;
    }
    return result;
}
Also used : PatternDescrBuilder(org.drools.drl.ast.dsl.PatternDescrBuilder) AndDescr(org.drools.drl.ast.descr.AndDescr) BaseDescr(org.drools.drl.ast.descr.BaseDescr) FunctionDescrBuilder(org.drools.drl.ast.dsl.FunctionDescrBuilder) DescrBuilder(org.drools.drl.ast.dsl.DescrBuilder) AccumulateImportDescrBuilder(org.drools.drl.ast.dsl.AccumulateImportDescrBuilder) ForallDescrBuilder(org.drools.drl.ast.dsl.ForallDescrBuilder) NamedConsequenceDescrBuilder(org.drools.drl.ast.dsl.NamedConsequenceDescrBuilder) DeclareDescrBuilder(org.drools.drl.ast.dsl.DeclareDescrBuilder) EvalDescrBuilder(org.drools.drl.ast.dsl.EvalDescrBuilder) AnnotationDescrBuilder(org.drools.drl.ast.dsl.AnnotationDescrBuilder) AccumulateDescrBuilder(org.drools.drl.ast.dsl.AccumulateDescrBuilder) WindowDeclarationDescrBuilder(org.drools.drl.ast.dsl.WindowDeclarationDescrBuilder) PatternDescrBuilder(org.drools.drl.ast.dsl.PatternDescrBuilder) FieldDescrBuilder(org.drools.drl.ast.dsl.FieldDescrBuilder) EntryPointDeclarationDescrBuilder(org.drools.drl.ast.dsl.EntryPointDeclarationDescrBuilder) EnumDeclarationDescrBuilder(org.drools.drl.ast.dsl.EnumDeclarationDescrBuilder) QueryDescrBuilder(org.drools.drl.ast.dsl.QueryDescrBuilder) UnitDescrBuilder(org.drools.drl.ast.dsl.UnitDescrBuilder) CollectDescrBuilder(org.drools.drl.ast.dsl.CollectDescrBuilder) ImportDescrBuilder(org.drools.drl.ast.dsl.ImportDescrBuilder) AnnotatedDescrBuilder(org.drools.drl.ast.dsl.AnnotatedDescrBuilder) BehaviorDescrBuilder(org.drools.drl.ast.dsl.BehaviorDescrBuilder) EnumLiteralDescrBuilder(org.drools.drl.ast.dsl.EnumLiteralDescrBuilder) GlobalDescrBuilder(org.drools.drl.ast.dsl.GlobalDescrBuilder) PackageDescrBuilder(org.drools.drl.ast.dsl.PackageDescrBuilder) AttributeDescrBuilder(org.drools.drl.ast.dsl.AttributeDescrBuilder) CEDescrBuilder(org.drools.drl.ast.dsl.CEDescrBuilder) PatternContainerDescrBuilder(org.drools.drl.ast.dsl.PatternContainerDescrBuilder) ConditionalBranchDescrBuilder(org.drools.drl.ast.dsl.ConditionalBranchDescrBuilder) TypeDeclarationDescrBuilder(org.drools.drl.ast.dsl.TypeDeclarationDescrBuilder) RuleDescrBuilder(org.drools.drl.ast.dsl.RuleDescrBuilder) ConditionalElementDescr(org.drools.drl.ast.descr.ConditionalElementDescr)

Aggregations

BaseDescr (org.drools.drl.ast.descr.BaseDescr)6 AccumulateDescrBuilder (org.drools.drl.ast.dsl.AccumulateDescrBuilder)6 AnnotatedDescrBuilder (org.drools.drl.ast.dsl.AnnotatedDescrBuilder)6 AnnotationDescrBuilder (org.drools.drl.ast.dsl.AnnotationDescrBuilder)6 AttributeDescrBuilder (org.drools.drl.ast.dsl.AttributeDescrBuilder)6 BehaviorDescrBuilder (org.drools.drl.ast.dsl.BehaviorDescrBuilder)6 CEDescrBuilder (org.drools.drl.ast.dsl.CEDescrBuilder)6 CollectDescrBuilder (org.drools.drl.ast.dsl.CollectDescrBuilder)6 ConditionalBranchDescrBuilder (org.drools.drl.ast.dsl.ConditionalBranchDescrBuilder)6 DeclareDescrBuilder (org.drools.drl.ast.dsl.DeclareDescrBuilder)6 DescrBuilder (org.drools.drl.ast.dsl.DescrBuilder)6 EntryPointDeclarationDescrBuilder (org.drools.drl.ast.dsl.EntryPointDeclarationDescrBuilder)6 EnumDeclarationDescrBuilder (org.drools.drl.ast.dsl.EnumDeclarationDescrBuilder)6 EnumLiteralDescrBuilder (org.drools.drl.ast.dsl.EnumLiteralDescrBuilder)6 EvalDescrBuilder (org.drools.drl.ast.dsl.EvalDescrBuilder)6 FieldDescrBuilder (org.drools.drl.ast.dsl.FieldDescrBuilder)6 ForallDescrBuilder (org.drools.drl.ast.dsl.ForallDescrBuilder)6 FunctionDescrBuilder (org.drools.drl.ast.dsl.FunctionDescrBuilder)6 GlobalDescrBuilder (org.drools.drl.ast.dsl.GlobalDescrBuilder)6 ImportDescrBuilder (org.drools.drl.ast.dsl.ImportDescrBuilder)6