Examples with BaseDescr org.drools.compiler.lang.descr.BaseDescr used on opensource projects

Example 96 with BaseDescr

use of org.drools.compiler.lang.descr.BaseDescr in project drools by kiegroup.

the class DRL5Parser method lhsOr.

/**
 * lhsOr := LEFT_PAREN OR lhsAnd+ RIGHT_PAREN
 *        | lhsAnd (OR lhsAnd)*
 *
 * @param ce
 * @param allowOr
 * @throws RecognitionException
 */
private BaseDescr lhsOr(final CEDescrBuilder<?, ?> ce, boolean allowOr) throws RecognitionException {
    BaseDescr result = null;
    if (allowOr && input.LA(1) == DRL5Lexer.LEFT_PAREN && helper.validateLT(2, DroolsSoftKeywords.OR)) {
        // prefixed OR
        CEDescrBuilder<?, OrDescr> or = null;
        if (state.backtracking == 0) {
            or = ce.or();
            result = or.getDescr();
            helper.start(or, CEDescrBuilder.class, null);
        }
        try {
            match(input, DRL5Lexer.LEFT_PAREN, null, null, DroolsEditorType.SYMBOL);
            if (state.failed)
                return null;
            match(input, DRL5Lexer.ID, DroolsSoftKeywords.OR, null, DroolsEditorType.KEYWORD);
            if (state.failed)
                return null;
            while (input.LA(1) == DRL5Lexer.AT) {
                // annotation*
                annotation(or);
                if (state.failed)
                    return null;
            }
            if (state.backtracking == 0) {
                helper.emit(Location.LOCATION_LHS_BEGIN_OF_CONDITION_AND_OR);
            }
            while (input.LA(1) != DRL5Lexer.RIGHT_PAREN) {
                lhsAnd(or, allowOr);
                if (state.failed)
                    return null;
            }
            match(input, DRL5Lexer.RIGHT_PAREN, null, null, DroolsEditorType.SYMBOL);
            if (state.failed)
                return null;
        } finally {
            if (state.backtracking == 0) {
                helper.end(CEDescrBuilder.class, or);
            }
        }
    } else {
        // infix OR
        // create an OR anyway, as if it is not an OR we remove it later
        CEDescrBuilder<?, OrDescr> or = null;
        if (state.backtracking == 0) {
            or = ce.or();
            result = or.getDescr();
            helper.start(or, CEDescrBuilder.class, null);
        }
        try {
            lhsAnd(or, allowOr);
            if (state.failed)
                return null;
            if (allowOr && (helper.validateIdentifierKey(DroolsSoftKeywords.OR) || input.LA(1) == DRL5Lexer.DOUBLE_PIPE)) {
                while (helper.validateIdentifierKey(DroolsSoftKeywords.OR) || input.LA(1) == DRL5Lexer.DOUBLE_PIPE) {
                    if (input.LA(1) == DRL5Lexer.DOUBLE_PIPE) {
                        match(input, DRL5Lexer.DOUBLE_PIPE, null, null, DroolsEditorType.SYMBOL);
                    } else {
                        match(input, DRL5Lexer.ID, DroolsSoftKeywords.OR, null, DroolsEditorType.KEYWORD);
                    }
                    if (state.failed)
                        return null;
                    while (input.LA(1) == DRL5Lexer.AT) {
                        // annotation*
                        annotation(or);
                        if (state.failed)
                            return null;
                    }
                    if (state.backtracking == 0) {
                        helper.emit(Location.LOCATION_LHS_BEGIN_OF_CONDITION_AND_OR);
                    }
                    lhsAnd(or, allowOr);
                    if (state.failed)
                        return null;
                }
            } else if (allowOr) {
                if (state.backtracking == 0) {
                    // if no OR present, then remove it and add children to parent
                    ((ConditionalElementDescr) ce.getDescr()).getDescrs().remove(or.getDescr());
                    for (BaseDescr base : or.getDescr().getDescrs()) {
                        ((ConditionalElementDescr) ce.getDescr()).addDescr(base);
                    }
                    result = ce.getDescr();
                }
            }
        } finally {
            if (state.backtracking == 0) {
                helper.end(CEDescrBuilder.class, or);
            }
        }
    }
    return result;
}

Example 97 with BaseDescr

use of org.drools.compiler.lang.descr.BaseDescr in project drools by kiegroup.

the class DRL5Parser method lhsAccumulate.

/**
 * lhsAccumulate := ACCUMULATE LEFT_PAREN lhsAnd (COMMA|SEMICOLON)
 *                      accumulateFunctionBinding (COMMA accumulateFunctionBinding)*
 *                      (SEMICOLON constraints)?
 *                  RIGHT_PAREN SEMICOLON?
 *
 * @param ce
 * @return
 * @throws 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 {
            match(input, DRL5Lexer.ID, DroolsSoftKeywords.ACCUMULATE, null, DroolsEditorType.KEYWORD);
            if (state.failed)
                return null;
            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 null;
            CEDescrBuilder<?, AndDescr> source = accumulate.source();
            try {
                helper.start(source, CEDescrBuilder.class, null);
                lhsAnd(source, false);
                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) == DRL5Lexer.COMMA) {
                match(input, DRL5Lexer.COMMA, null, null, DroolsEditorType.SYMBOL);
                if (state.failed)
                    return null;
            } else if (input.LA(-1) != DRL5Lexer.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, DRL5Lexer.SEMICOLON, null, null, DroolsEditorType.SYMBOL);
                if (state.failed)
                    return null;
            }
            // accumulate functions
            accumulateFunctionBinding(accumulate);
            if (state.failed)
                return null;
            while (input.LA(1) == DRL5Lexer.COMMA) {
                match(input, DRL5Lexer.COMMA, null, null, DroolsEditorType.SYMBOL);
                if (state.failed)
                    return null;
                accumulateFunctionBinding(accumulate);
                if (state.failed)
                    return null;
            }
            if (input.LA(1) == DRL5Lexer.SEMICOLON) {
                match(input, DRL5Lexer.SEMICOLON, null, null, DroolsEditorType.SYMBOL);
                if (state.failed)
                    return null;
                constraints(pattern);
            }
            match(input, DRL5Lexer.RIGHT_PAREN, null, null, DroolsEditorType.SYMBOL);
            if (state.failed)
                return null;
        } finally {
            helper.end(AccumulateDescrBuilder.class, accumulate);
            if (state.backtracking == 0 && input.LA(1) != DRL5Lexer.EOF) {
                helper.emit(Location.LOCATION_LHS_BEGIN_OF_CONDITION);
            }
        }
    } finally {
        helper.end(PatternDescrBuilder.class, pattern);
    }
    if (input.LA(1) == DRL5Lexer.SEMICOLON) {
        match(input, DRL5Lexer.SEMICOLON, null, null, DroolsEditorType.SYMBOL);
        if (state.failed)
            return null;
    }
    return result;
}

Example 98 with BaseDescr

use of org.drools.compiler.lang.descr.BaseDescr in project drools by kiegroup.

the class DRL5Parser method lhsAnd.

/**
 * lhsAnd := LEFT_PAREN AND lhsUnary+ RIGHT_PAREN
 *         | lhsUnary (AND lhsUnary)*
 *
 * @param ce
 * @throws RecognitionException
 */
private BaseDescr lhsAnd(final CEDescrBuilder<?, ?> ce, boolean allowOr) throws RecognitionException {
    BaseDescr result = null;
    if (input.LA(1) == DRL5Lexer.LEFT_PAREN && helper.validateLT(2, DroolsSoftKeywords.AND)) {
        // prefixed AND
        CEDescrBuilder<?, AndDescr> and = null;
        if (state.backtracking == 0) {
            and = ce.and();
            result = ce.getDescr();
            helper.start(and, CEDescrBuilder.class, null);
        }
        try {
            match(input, DRL5Lexer.LEFT_PAREN, null, null, DroolsEditorType.SYMBOL);
            if (state.failed)
                return null;
            match(input, DRL5Lexer.ID, DroolsSoftKeywords.AND, null, DroolsEditorType.KEYWORD);
            if (state.failed)
                return null;
            while (input.LA(1) == DRL5Lexer.AT) {
                // annotation*
                annotation(and);
                if (state.failed)
                    return null;
            }
            if (state.backtracking == 0) {
                helper.emit(Location.LOCATION_LHS_BEGIN_OF_CONDITION_AND_OR);
            }
            while (input.LA(1) != DRL5Lexer.RIGHT_PAREN) {
                lhsUnary(and, allowOr);
                if (state.failed)
                    return null;
            }
            match(input, DRL5Lexer.RIGHT_PAREN, null, null, DroolsEditorType.SYMBOL);
            if (state.failed)
                return null;
        } finally {
            if (state.backtracking == 0) {
                helper.end(CEDescrBuilder.class, and);
            }
        }
    } else {
        // infix AND
        // create an AND anyway, since if it is not an AND we remove it later
        CEDescrBuilder<?, AndDescr> and = null;
        if (state.backtracking == 0) {
            and = ce.and();
            result = and.getDescr();
            helper.start(and, CEDescrBuilder.class, null);
        }
        try {
            lhsUnary(and, allowOr);
            if (state.failed)
                return null;
            if (helper.validateIdentifierKey(DroolsSoftKeywords.AND) || input.LA(1) == DRL5Lexer.DOUBLE_AMPER) {
                while (helper.validateIdentifierKey(DroolsSoftKeywords.AND) || input.LA(1) == DRL5Lexer.DOUBLE_AMPER) {
                    if (input.LA(1) == DRL5Lexer.DOUBLE_AMPER) {
                        match(input, DRL5Lexer.DOUBLE_AMPER, null, null, DroolsEditorType.SYMBOL);
                    } else {
                        match(input, DRL5Lexer.ID, DroolsSoftKeywords.AND, null, DroolsEditorType.KEYWORD);
                    }
                    if (state.failed)
                        return null;
                    while (input.LA(1) == DRL5Lexer.AT) {
                        // annotation*
                        annotation(and);
                        if (state.failed)
                            return null;
                    }
                    if (state.backtracking == 0) {
                        helper.emit(Location.LOCATION_LHS_BEGIN_OF_CONDITION_AND_OR);
                    }
                    lhsUnary(and, allowOr);
                    if (state.failed)
                        return null;
                }
            } else {
                if (state.backtracking == 0 && and.getDescr().getDescrs().size() < 2) {
                    // if no AND present, then remove it and add children to parent
                    ((ConditionalElementDescr) ce.getDescr()).getDescrs().remove(and.getDescr());
                    for (BaseDescr base : and.getDescr().getDescrs()) {
                        ((ConditionalElementDescr) ce.getDescr()).addDescr(base);
                    }
                    result = ce.getDescr();
                }
            }
        } finally {
            if (state.backtracking == 0) {
                helper.end(CEDescrBuilder.class, and);
            }
        }
    }
    return result;
}

Example 99 with BaseDescr

use of org.drools.compiler.lang.descr.BaseDescr in project drools by kiegroup.

the class DRL5Parser method fromAccumulate.

/**
 * fromAccumulate := ACCUMULATE LEFT_PAREN lhsAnd COMMA
 *                   ( INIT chunk_(_) COMMA ACTION chunk_(_) COMMA
 *                     ( REVERSE chunk_(_) COMMA)? RESULT chunk_(_)
 *                   | accumulateFunction
 *                   ) RIGHT_PAREN
 *
 * @param pattern
 * @throws RecognitionException
 */
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 = (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) == 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);
        }
    }
}

Example 100 with BaseDescr

use of org.drools.compiler.lang.descr.BaseDescr in project drools by kiegroup.

the class MVELDumper method processNullSafeDereferencing.

private String[] processNullSafeDereferencing(String expr, AtomicExprDescr atomicExpr, ConstraintConnectiveDescr ccd, int nullSafePos, int parentIdx, int childIdx) {
    // convert "field1!.field2" in ["field1 != null && ", "field1.field2"]
    String field1 = expr.substring(0, nullSafePos).trim();
    expr = field1 + "." + expr.substring(nullSafePos + 2).trim();
    RelationalExprDescr check = new RelationalExprDescr("!=", false, null, new AtomicExprDescr(getPreconditionsToAppend(field1)), new AtomicExprDescr("null"));
    if (ccd.getConnective() == ConnectiveType.AND || ccd.getConnective() == ConnectiveType.INC_AND) {
        ccd.getDescrs().add(childIdx, check);
    } else {
        BaseDescr desc = ccd.getDescrs().get(parentIdx);
        if (desc instanceof ConstraintConnectiveDescr) {
            ((ConstraintConnectiveDescr) desc).getDescrs().add(childIdx, check);
        } else {
            ConstraintConnectiveDescr localAnd = new ConstraintConnectiveDescr(ConnectiveType.AND);
            BaseDescr original = ccd.getDescrs().remove(parentIdx);
            localAnd.getDescrs().add(check);
            localAnd.getDescrs().add(original);
            ccd.getDescrs().add(parentIdx, localAnd);
        }
    }
    String innerCheck = check.toString() + " && ";
    String[] nullCheckAndExpr = new String[] { innerCheck, expr };
    atomicExpr.setRewrittenExpression(expr);
    return nullCheckAndExpr;
}