| Constructor and Description |
|---|
AggregateVal(Val val)
Constructor.
|
| Modifier and Type | Method and Description |
|---|---|
void |
acceptVisit(ExpressionVisitor visitor)
Accept a visit from a tree visitor.
|
protected Collection |
eval(Collection candidates,
Object orig,
StoreContext ctx,
Object[] params)
Return a list of values resulting from evaluating each given
candidate.
|
protected Object |
eval(Object candidate,
Object orig,
StoreContext ctx,
Object[] params)
Return this value for the given candidate.
|
Class |
getType()
Return the expected type for this value, or
Object if
the type is unknown. |
protected abstract Class |
getType(Class c)
Return the type of this aggregate based on the value type.
|
boolean |
isAggregate()
Return true if this value is an aggregate.
|
protected abstract Object |
operate(Collection os,
Class c)
Aggregate the given values.
|
void |
setImplicitType(Class type)
Set the implicit type of the value, based on how it is used in the
filter.
|
evaluate, evaluate, getAlias, getMetaData, getName, getPath, getSelectAs, isVariable, isXPath, setAlias, setMetaDatapublic AggregateVal(Val val)
public boolean isAggregate()
ValueisAggregate in interface ValueisAggregate in class Valpublic Class getType()
ValueObject if
the type is unknown.public void setImplicitType(Class type)
ValueObject from Value.getType().protected Object eval(Object candidate, Object orig, StoreContext ctx, Object[] params)
Valprotected Collection eval(Collection candidates, Object orig, StoreContext ctx, Object[] params)
Val#eval(Object,Object,StoreContext,Map) for
each instance and packs the return value into a new list. Aggregates
should override.protected abstract Class getType(Class c)
protected abstract Object operate(Collection os, Class c)
public void acceptVisit(ExpressionVisitor visitor)
ValueacceptVisit in interface ValueacceptVisit in class ValCopyright © 2006–2015 Apache Software Foundation. All rights reserved.