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java.lang.Objectorg.apache.openjpa.jdbc.kernel.exps.AbstractVal
org.apache.openjpa.jdbc.kernel.exps.SubQ
public class SubQ
A subquery.
| 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 | |
|---|---|
SubQ(ClassMapping candidate,
boolean subs,
String alias)
Constructor. |
|
| Method Summary | |
|---|---|
void |
acceptVisit(ExpressionVisitor visitor)
Accept a visit from a tree visitor. |
void |
appendIsEmpty(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
Append the SQL testing whether this value is empty to the given buffer. |
void |
appendIsNotEmpty(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
Append the SQL testing whether this value is not empty to the given buffer. |
void |
appendSize(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
Append the SQL checking the size of this value. |
void |
appendTo(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql,
int index)
Append the indexth 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. |
ClassMapping |
getCandidate()
Return the subquery candidate type. |
String |
getCandidateAlias()
Return the candidate alias for this subquery. |
ClassMetaData |
getMetaData()
Return any associated persistent type. |
Object |
getSelect()
|
String |
getSubqAlias()
|
boolean |
getSubs()
|
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. |
void |
setQueryExpressions(QueryExpressions query)
Set the parsed subquery. |
void |
setSubqAlias(String subqAlias)
|
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, appendIsNotNull, appendIsNull, 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 |
| Methods inherited from interface org.apache.openjpa.kernel.exps.Value |
|---|
getAlias, getName, getPath, getSelectAs, isAggregate, isVariable, isXPath, setAlias |
| Constructor Detail |
|---|
public SubQ(ClassMapping candidate,
boolean subs,
String alias)
| Method Detail |
|---|
public Object getSelect()
getSelect in interface Subquerypublic ClassMapping getCandidate()
public boolean getSubs()
public void setSubqAlias(String subqAlias)
setSubqAlias in interface Subquerypublic String getSubqAlias()
getSubqAlias in interface Subquerypublic Class getType()
ValueObject if
the type is unknown.
getType in interface Valuepublic void setImplicitType(Class type)
ValueObject from Value.getType().
setImplicitType in interface Valuepublic ClassMetaData getMetaData()
Value
getMetaData in interface Valuepublic void setMetaData(ClassMetaData meta)
Value
setMetaData in interface Valuepublic String getCandidateAlias()
Subquery
getCandidateAlias in interface Subquerypublic void setQueryExpressions(QueryExpressions query)
Subquery
setQueryExpressions in interface Subquery
public ExpState initialize(Select sel,
ExpContext ctx,
int flags)
Val
initialize in interface Val
public Object toDataStoreValue(Select sel,
ExpContext ctx,
ExpState state,
Object val)
Val
toDataStoreValue in interface ValtoDataStoreValue in class AbstractVal
public void select(Select sel,
ExpContext ctx,
ExpState state,
boolean pks)
Val
select in interface Val
public void selectColumns(Select sel,
ExpContext ctx,
ExpState state,
boolean pks)
Val
selectColumns in interface Val
public void groupBy(Select sel,
ExpContext ctx,
ExpState state)
Val
groupBy in interface Val
public void orderBy(Select sel,
ExpContext ctx,
ExpState state,
boolean asc)
Val
orderBy in interface Val
public Object load(ExpContext ctx,
ExpState state,
Result res)
throws SQLException
Val
load in interface ValSQLException
public void calculateValue(Select sel,
ExpContext ctx,
ExpState state,
Val other,
ExpState otherState)
Vallength or any append methods.
calculateValue in interface Valother - the value being compared to, or null if not a comparison
public int length(Select sel,
ExpContext ctx,
ExpState state)
Val
length in interface Val
public void appendTo(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql,
int index)
Valindexth SQL element to the given buffer.
appendTo in interface Val
public void appendIsEmpty(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
Val
appendIsEmpty in interface ValappendIsEmpty in class AbstractVal
public void appendIsNotEmpty(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
Val
appendIsNotEmpty in interface ValappendIsNotEmpty in class AbstractVal
public void appendSize(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
Val
appendSize in interface ValappendSize in class AbstractValpublic void acceptVisit(ExpressionVisitor visitor)
Value
acceptVisit in interface ValueacceptVisit in class AbstractVal
|
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