Package javax.slee.annotation

Annotation Type Query

  • @Documented
@Inherited
@Retention(RUNTIME)
public @interface Query
    The query element declares a static query. It contains an optional description, optional query options, zero or more query parameters, and a query search term defined inside an Expression.

    A simple query represented in xml such as this: 

     <query name="simple">
    <query-parameter name="simpleParam1" type="java.lang.String"/>
    <compare attribute-name="countryCode" op="equals" parameter="simpleParam1"/>
 </query>

    can be created by constructing a query structure such as: 

    @Query(name="simple",
       queryParameters = ,
       expression = @Expression(
           term = @Term(compare = @Compare(attributeName = "countryCode", op="equals", parameter="simpleParam1"))
       )
)

    Complex queries that use conditional operators need to be constructed using a ConditionalExpression. A ConditionalExpression allows the operator (AND,OR,NOT) to be used with a number of Term's. To construct the more complex example below that contains nested conditions: 

     <query name="AConditionalQuery">
    <and>
        <has-prefix attribute-name="anAttr" value="val1"/>
        <or>
            <has-prefix attribute-name="anotherAttr" value="val2"/>
            <compare attribute-name="yetAnotherAttr" op="equals" value="val3"/>
        </or>
    </and>
 </query>

    A structure such as the one described below would be used. Care should be taken to ensure that the conditional alias's are used correctly. 

     @Query(name = "AConditionalQuery",
        expression = @Expression(
                         term = @Term(conditionalExpressionAlias = "conditionalAND"),
                         conditionalExpressions = {
                             @ConditionalExpression(
                                     alias="conditionalAND",
                                     condition = Condition.and,
                                     terms = {
                                        @Term(hasPrefix = @HasPrefix(attributeName = "anAttr", value="val1")),
                                        @Term(conditionalExpressionAlias = "conditionalOR")
                                     }
                             ),
                             @ConditionalExpression(
                                      alias="conditionalOR",
                                      condition = Condition.or,
                                      terms = {
                                          @Term(hasPrefix = @HasPrefix(attributeName = "anotherAttr", value="val2")),
                                          @Term(compare = @Compare(attributeName = "yetAnotherAttr", op="equals", value="val3"))
                                      }
                             )
             }
)

    • Element Detail

      • name

        String name
        Default:
        ""

      • description

        String description
        Default:
        ""

      • queryOptions

        QueryOptions queryOptions
        Default:
        @javax.slee.annotation.QueryOptions

      • expression

        Expression expression
        Default:
        @javax.slee.annotation.Expression