|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Object org.apache.openjpa.jdbc.kernel.exps.AbstractVal org.apache.openjpa.jdbc.kernel.exps.GetObjectId
class GetObjectId
Select the oid value of an object; typically used in projections.
Field Summary |
---|
Fields inherited from class org.apache.openjpa.jdbc.kernel.exps.AbstractVal |
---|
FALSE, TRUE |
Fields inherited from interface org.apache.openjpa.jdbc.kernel.exps.Val |
---|
ABS_VAL, ARGS_VAL, CMP_EQUAL, COALESCE_VAL, CONCAT_VAL, FORCE_OUTER, GENERALCASE_VAL, INDEXOF_VAL, JOIN_REL, LENGTH_VAL, LOCATE_VAL, LOWER_VAL, MATH_VAL, NULL_CMP, NULLIF_VAL, SIMPLECASE_VAL, SQRT_VAL, SUBSTRING_VAL, TRIM_VAL, UPPER_VAL, VAL, WHENCONDITION_VAL, WHENSCALAR_VAL |
Constructor Summary | |
---|---|
GetObjectId(PCPath path)
Constructor. |
Method Summary | |
---|---|
void |
acceptVisit(ExpressionVisitor visitor)
Accept a visit from a tree visitor. |
void |
appendTo(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql,
int index)
Append the index th SQL element to the given buffer. |
void |
calculateValue(Select sel,
ExpContext ctx,
ExpState state,
Val other,
ExpState otherState)
Calculate and cache the SQL for this value. |
Column[] |
getColumns(ExpState state)
Return the oid columns. |
ClassMetaData |
getMetaData()
Return any associated persistent type. |
Class |
getType()
Return the expected type for this value, or Object if
the type is unknown. |
void |
groupBy(Select sel,
ExpContext ctx,
ExpState state)
Group by this value. |
ExpState |
initialize(Select sel,
ExpContext ctx,
int flags)
Initialize the value. |
int |
length(Select sel,
ExpContext ctx,
ExpState state)
Return the number of SQL elements in this value. |
Object |
load(ExpContext ctx,
ExpState state,
Result res)
Load the data for this value. |
void |
orderBy(Select sel,
ExpContext ctx,
ExpState state,
boolean asc)
Order by this value. |
void |
select(Select sel,
ExpContext ctx,
ExpState state,
boolean pks)
Select the data for this value. |
void |
selectColumns(Select sel,
ExpContext ctx,
ExpState state,
boolean pks)
Select just the columns for this value. |
void |
setImplicitType(Class type)
Set the implicit type of the value, based on how it is used in the filter. |
void |
setMetaData(ClassMetaData meta)
Associate a persistent type with this value. |
Object |
toDataStoreValue(Select sel,
ExpContext ctx,
ExpState state,
Object val)
Return the datastore value of the given object in the context of this value. |
Methods inherited from class org.apache.openjpa.jdbc.kernel.exps.AbstractVal |
---|
appendIndex, appendIsEmpty, appendIsNotEmpty, appendIsNotNull, appendIsNull, appendSize, appendType, getAlias, getId, getName, getPath, getSelectAs, isAggregate, isVariable, isXPath, setAlias |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
---|
public GetObjectId(PCPath path)
Method Detail |
---|
public Column[] getColumns(ExpState state)
public ClassMetaData getMetaData()
Value
public void setMetaData(ClassMetaData meta)
Value
public Class getType()
Value
Object
if
the type is unknown.
public void setImplicitType(Class type)
Value
Object
from Value.getType()
.
public ExpState initialize(Select sel, ExpContext ctx, int flags)
Val
public Object toDataStoreValue(Select sel, ExpContext ctx, ExpState state, Object val)
Val
toDataStoreValue
in interface Val
toDataStoreValue
in class AbstractVal
public void select(Select sel, ExpContext ctx, ExpState state, boolean pks)
Val
public void selectColumns(Select sel, ExpContext ctx, ExpState state, boolean pks)
Val
public void groupBy(Select sel, ExpContext ctx, ExpState state)
Val
public void orderBy(Select sel, ExpContext ctx, ExpState state, boolean asc)
Val
public Object load(ExpContext ctx, ExpState state, Result res) throws SQLException
Val
SQLException
public void calculateValue(Select sel, ExpContext ctx, ExpState state, Val other, ExpState otherState)
Val
length
or any append
methods.
other
- the value being compared to, or null if not a comparisonpublic int length(Select sel, ExpContext ctx, ExpState state)
Val
public void appendTo(Select sel, ExpContext ctx, ExpState state, SQLBuffer sql, int index)
Val
index
th SQL element to the given buffer.
public void acceptVisit(ExpressionVisitor visitor)
Value
acceptVisit
in interface Value
acceptVisit
in class AbstractVal
|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |