Examples with NullOperand io.requery.query.NullOperand used on opensource projects

Example 1 with NullOperand

use of io.requery.query.NullOperand in project requery by requery.

the class DefaultOutput method appendOperation.

private void appendOperation(Condition condition, int depth) {
    Object leftOperand = condition.getLeftOperand();
    if (leftOperand instanceof Expression) {
        final Expression<?> expression = (Expression<?>) condition.getLeftOperand();
        appendColumn(expression);
        Object value = condition.getRightOperand();
        appendOperator(condition.getOperator());
        if (value instanceof Collection && (condition.getOperator() == Operator.IN || condition.getOperator() == Operator.NOT_IN)) {
            Collection collection = (Collection) value;
            qb.openParenthesis();
            qb.commaSeparated(collection, new QueryBuilder.Appender() {

                @Override
                public void append(QueryBuilder qb, Object value) {
                    appendConditionValue(expression, value);
                }
            });
            qb.closeParenthesis();
        } else if (value instanceof Object[]) {
            Object[] values = (Object[]) value;
            if (condition.getOperator() == Operator.BETWEEN) {
                Object begin = values[0];
                Object end = values[1];
                appendConditionValue(expression, begin);
                qb.keyword(AND);
                appendConditionValue(expression, end);
            } else {
                for (Object o : values) {
                    appendConditionValue(expression, o);
                }
            }
        } else if (value instanceof QueryWrapper) {
            QueryWrapper wrapper = (QueryWrapper) value;
            qb.openParenthesis();
            appendQuery(wrapper);
            qb.closeParenthesis().space();
        } else if (value instanceof Condition) {
            appendOperation((Condition) value, depth + 1);
        } else if (value != null) {
            appendConditionValue(expression, value);
        }
    } else if (leftOperand instanceof Condition) {
        // Handle unary operator
        if (condition.getRightOperand() instanceof NullOperand) {
            appendOperator(condition.getOperator());
            if (depth > 0) {
                qb.openParenthesis();
            }
            appendOperation((Condition) leftOperand, depth + 1);
            if (depth > 0) {
                qb.closeParenthesis().space();
            }
        } else {
            if (depth > 0) {
                qb.openParenthesis();
            }
            appendOperation((Condition) leftOperand, depth + 1);
            appendOperator(condition.getOperator());
            Object value = condition.getRightOperand();
            if (value instanceof Condition) {
                appendOperation((Condition) value, depth + 1);
            } else {
                throw new IllegalStateException();
            }
            if (depth > 0) {
                qb.closeParenthesis().space();
            }
        }
    } else {
        throw new IllegalStateException("unknown start expression type " + leftOperand);
    }
}