Package com.tonbeller.wcf.param

Implements Session Parameters.

See:
Description

Interface Summary

ParamLinkTag.Action	Actions may be added to the link.
SqlExpr
SqlExprVisitor

Class Summary

ParamLinkActionTag	calls a method on a bean when invoked.
ParamLinkGroupTag	Groups several ParamLink Tags.
ParamLinkNestedTag
ParamLinkParamTag	Tag nested inside a ParamLinkTag.
ParamLinkTag	produces an <a href="..."
ParamLinkTag.InvokeMethodAction	invokes a Method with the signature methodName(RequestContext context) throws Exception;
ParamSqlMappingTag
ParamSqlTag	outputs SQL for a SessionParam.
PushParamTag	Overrides a session param between start and end tag.
SessionParam
SessionParamPool	A pool that contains all SessionParam instances of a session.
SessionParamPoolTag	ensures the SessionParamPool exists
SetParamTag	creates or replaces a session parameter
SetParamTagBase
SqlAndExpr
SqlBetweenExpr
SqlColumnConstraint
SqlDummyExpr	Dummy SQL Expression like "1=1"
SqlEqualExpr	generates WHERE COLUMN = 'VALUE-LITERAL'
SqlGenerator
SqlInExpr	generates WHERE COLUMN IN ('VALUE-LITERAL-1', ...)
SqlOrExpr
SqlValueMap	implements a map that maps to the sqlValue property of the SessionParam's in the SessionParamPool.

Exception Summary

MissingParameterException

indicates that a parameter was expected in the paramPool but was not found.

Package com.tonbeller.wcf.param Description

Implements Session Parameters.

A SessionParam is a parameter that can modify MDX and SQL queries. The parameters are held in a SessionParamPool. There is one pool per HttpSession.

SessionParam may be created in several ways:

• by some application logic. For example at login-time there may be some parameters that restrict the data a user is allowed to see
• by clicking on a member in the JPivot table com.tonbeller.jpivot.table.navi.ClickableMemberTag
• by clicking on a hyperlink ParamLinkTag

Parameters may be used in sql queries. Example for JSTL's sql tag:

<wcf:paramPool/>

<sql:query var="result" dataSource="${myDataSource}">
  SELECT ...
  FROM CUSTOMERS T1, ...
  WHERE <wcf:paramSql param="CUSTOMERID" qname="T1.CUSTOMER_PK"/>
</sql:query>

See unit tests and paramtest.jsp for more examples.