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java.lang.Objectorg.apache.openjpa.kernel.exps.Val
org.apache.openjpa.kernel.exps.Coalesce
public class Coalesce
An in-memory representation of a coalesce expression
| Constructor Summary | |
|---|---|
Coalesce(Val[] val)
Constructor. |
|
| Method Summary | |
|---|---|
void |
acceptVisit(ExpressionVisitor visitor)
Accept a visit from a tree visitor. |
protected boolean |
compare(Object o1,
Object o2)
Compare the two values. |
protected Object |
eval(Object candidate,
Object orig,
StoreContext ctx,
Object[] params)
Return this value for the given candidate. |
protected Object |
eval(Object candidate,
StoreContext ctx,
Object[] params)
|
Class |
getType()
Return the expected type for this value, or Object if
the type is unknown. |
Val[] |
getVal()
|
void |
setImplicitType(Class type)
Set the implicit type of the value, based on how it is used in the filter. |
| Methods inherited from class org.apache.openjpa.kernel.exps.Val |
|---|
eval, evaluate, evaluate, getAlias, getMetaData, getName, getPath, getSelectAs, isAggregate, isVariable, isXPath, setAlias, setMetaData |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
|---|
Coalesce(Val[] val)
| Method Detail |
|---|
protected Object eval(Object candidate,
Object orig,
StoreContext ctx,
Object[] params)
Val
eval in class Val
protected Object eval(Object candidate,
StoreContext ctx,
Object[] params)
protected boolean compare(Object o1,
Object o2)
public Val[] getVal()
public Class getType()
ValueObject if
the type is unknown.
public void setImplicitType(Class type)
ValueObject from Value.getType().
public void acceptVisit(ExpressionVisitor visitor)
Value
acceptVisit in interface ValueacceptVisit in class Val
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