com.solarmetric.rd.kodo.query.exp
Class BoundVariable

java.lang.Object
  |
  +--com.solarmetric.rd.kodo.query.exp.BoundVariable

All Implemented Interfaces:

InMemoryValue, Value

public class BoundVariable

extends java.lang.Object

implements InMemoryValue

Represents a bound variable. Variables are aliased to the collection that is stated to contain them in the query. When the query is evaluated, expressions containing variables will be executed once for every element in the collection.

Constructor Summary

BoundVariable(java.lang.String name, java.lang.Class type)
Constructor.

Method Summary

void	castTo(java.lang.Class type) Cast this value to the given type.
java.lang.Object	evaluate(java.lang.Object candidate, java.lang.Object orig, com.solarmetric.rd.kodo.runtime.PersistenceManagerImpl pm, java.util.Map params) Evaluate the given candidate.
boolean	isVariable() Return true if this value is a variable.
boolean	setValue(java.lang.Object value) Set the value this variable should take for the current iteration.

Methods inherited from class java.lang.Object

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

Constructor Detail

BoundVariable

public BoundVariable(java.lang.String name,
                     java.lang.Class type)

Constructor. Provide variable name and type.

Method Detail

setValue

public boolean setValue(java.lang.Object value)

Set the value this variable should take for the current iteration.

Returns:

false if the type is incompatible with the variable's declared type

isVariable

public boolean isVariable()

Description copied from interface: Value

Return true if this value is a variable.

Specified by:

isVariable in interface Value

castTo

public void castTo(java.lang.Class type)

Description copied from interface: InMemoryValue

Cast this value to the given type.

Specified by:

castTo in interface InMemoryValue

evaluate

public java.lang.Object evaluate(java.lang.Object candidate,
                                 java.lang.Object orig,
                                 com.solarmetric.rd.kodo.runtime.PersistenceManagerImpl pm,
                                 java.util.Map params)

Description copied from interface: InMemoryValue

Evaluate the given candidate.

Specified by:

evaluate in interface InMemoryValue