org.josql.functions
Class MiscellaneousFunctions

java.lang.Object
  org.josql.functions.AbstractFunctionHandler
      org.josql.functions.MiscellaneousFunctions

All Implemented Interfaces:

FunctionHandler

public class MiscellaneousFunctions
extends AbstractFunctionHandler

Field Summary

static String

HANDLER_ID

Fields inherited from class org.josql.functions.AbstractFunctionHandler

q

Constructor Summary

MiscellaneousFunctions()

Method Summary

double	abs(Number d)
Object	accessor(Expression oExp, Expression accExp) Call the specified accessor on the object.
Object	accessor(Object o, String acc) Call the specified accessor on the object.
void	cache(List allobjs, Expression exp)
void	cache(List allobjs, com.gentlyweb.utils.Getter get)
Object	eval(Expression exp)
String	fileExtension(Object f)
Object	ifThen(Expression ifcond, Expression thenVal)
Object	ifThenElse(Expression ifcond, Expression thenVal, Expression elseVal)
Boolean	instanceOf(Expression obj, Expression clazz) Evaluates the type expression to produce a object whose type should be compared against the class gained from evaluation of the clazz expression.
Date	now(boolean zeroTime) Return the current date.
int	random()
int	random(Number n)
double	randomDouble()
Object	save_value(Object saveValueName)
Object	savevalue(Object saveValueName)
Object	saveValue(Object saveValueName)

Methods inherited from class org.josql.functions.AbstractFunctionHandler

setQuery

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

HANDLER_ID

public static final String HANDLER_ID

See Also:

Constant Field Values

Constructor Detail

MiscellaneousFunctions

public MiscellaneousFunctions()

Method Detail

now

public Date now(boolean zeroTime)

Return the current date.

Parameters:

zeroTime - If set to true then the date returned will have it's time fields set to zero.

Returns:

A date object.

cache

public void cache(List allobjs,
                  com.gentlyweb.utils.Getter get)
           throws QueryExecutionException

Throws:

QueryExecutionException

cache

public void cache(List allobjs,
                  Expression exp)
           throws QueryExecutionException

Throws:

QueryExecutionException

abs

public double abs(Number d)

random

public int random()

random

public int random(Number n)

randomDouble

public double randomDouble()

saveValue

public Object saveValue(Object saveValueName)

savevalue

public Object savevalue(Object saveValueName)

save_value

public Object save_value(Object saveValueName)

fileExtension

public String fileExtension(Object f)

accessor

public Object accessor(Expression oExp,
                       Expression accExp)
                throws Exception

Call the specified accessor on the object.

Parameters:

oExp - The expression to use to evaluate to get the object.

accExp - The expression that is evaluated to get the accessor.

Returns:

The value returned from the accessor.

Throws:

Exception - If there is something wrong.

accessor

public Object accessor(Object o,
                       String acc)
                throws Exception

Call the specified accessor on the object.

Parameters:

o - The object to call the accessor on.

acc - The accessor.

Returns:

The value returned from the accessor.

Throws:

Exception - If there is something wrong.

ifThen

public Object ifThen(Expression ifcond,
                     Expression thenVal)
              throws QueryExecutionException

Throws:

QueryExecutionException

ifThenElse

public Object ifThenElse(Expression ifcond,
                         Expression thenVal,
                         Expression elseVal)
                  throws QueryExecutionException

Throws:

QueryExecutionException

eval

public Object eval(Expression exp)
            throws QueryExecutionException

Throws:

QueryExecutionException

instanceOf

public Boolean instanceOf(Expression obj,
                          Expression clazz)
                   throws QueryExecutionException

Evaluates the type expression to produce a object whose type should be compared against the class gained from evaluation of the clazz expression. In effect the following is performed:

   obj.getValue (q.getCurrentObject (), q)
     instanceof clazz.getValue (q.getCurrentObject (), q).getClass ()
 

This is really just a thin wrapper around Class.isInstance(Object).

Parameters:

obj - The expression that represents the object to against.

clazz - The expression that represents the class of the type to compare against.

Throws:

QueryExecutionException - If either of the expressions can't be evaluated.