Modifier and Type | Method and Description |
---|---|
void |
acceptVisit(ExpressionVisitor visitor)
Accept a visit from a tree visitor.
|
protected java.util.Collection |
eval(java.util.Collection candidates,
java.lang.Object orig,
StoreContext ctx,
java.lang.Object[] params)
Return a list of values resulting from evaluating each given
candidate.
|
protected java.lang.Object |
eval(java.lang.Object candidate,
java.lang.Object orig,
StoreContext ctx,
java.lang.Object[] params)
Return this value for the given candidate.
|
java.lang.Class |
getType()
Return the expected type for this value, or
Object if
the type is unknown. |
void |
setImplicitType(java.lang.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, isAggregate, isVariable, isXPath, setAlias, setMetaData
public Distinct(Val val)
public java.lang.Class getType()
Value
Object
if
the type is unknown.public void setImplicitType(java.lang.Class type)
Value
Object
from Value.getType()
.protected java.lang.Object eval(java.lang.Object candidate, java.lang.Object orig, StoreContext ctx, java.lang.Object[] params)
Val
protected java.util.Collection eval(java.util.Collection candidates, java.lang.Object orig, StoreContext ctx, java.lang.Object[] params)
Val
#eval(Object,Object,StoreContext,Map)
for
each instance and packs the return value into a new list. Aggregates
should override.public void acceptVisit(ExpressionVisitor visitor)
Value
acceptVisit
in interface Value
acceptVisit
in class Val
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