microsoft-azure-storage/src/com/microsoft/azure/storage/table/TableQuery.java
public static String combineFilters(String filterA, String operator, String filterB) {
        return String.format("(%s) %s (%s)", filterA, operator, filterB);
    }
public static String combineFilters(String filterA, String operator, String filterB) {
        return String.format("(%s) %s (%s)", filterA, operator, filterB);
    }
Creates a filter condition using the specified logical operator on two filter conditions.

@param filterA
A <code>String</code> which specifies the first formatted filter condition.
@param operator
A <code>String</code> which specifies <code>Operators.AND</code> or <code>Operators.OR</code>.
@param filterB
A <code>String</code> which specifies the first formatted filter condition.
@return
A <code>String</code> which represents the combined filter expression.