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java.lang.Objectorg.apache.openjpa.jdbc.kernel.exps.AbstractVal
org.apache.openjpa.jdbc.kernel.exps.Extension
class Extension
Filter listener that evaluates to a value.
| 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 | |
|---|---|
Extension(JDBCFilterListener listener,
Val target,
Val arg,
ClassMapping candidate)
Constructor. |
|
| Method Summary | |
|---|---|
void |
acceptVisit(ExpressionVisitor visitor)
Accept a visit from a tree visitor. |
void |
appendTo(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
Append the SQL for this expression to the given buffer. |
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. |
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. |
ExpState |
initialize(Select sel,
ExpContext ctx,
Map contains)
Initialize the expression. |
boolean |
isAggregate()
Return true if this value is an aggregate. |
boolean |
isVariable()
Return true if this value is a variable. |
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. |
| Methods inherited from class org.apache.openjpa.jdbc.kernel.exps.AbstractVal |
|---|
appendIndex, appendIsEmpty, appendIsNotEmpty, appendIsNotNull, appendIsNull, appendSize, appendType, getAlias, getId, getName, getPath, getSelectAs, isXPath, setAlias, toDataStoreValue |
| 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.jdbc.kernel.exps.Val |
|---|
appendIndex, appendIsEmpty, appendIsNotEmpty, appendIsNotNull, appendIsNull, appendSize, appendType, getId, getSelectAs, toDataStoreValue |
| Methods inherited from interface org.apache.openjpa.kernel.exps.Value |
|---|
getAlias, getName, getPath, isXPath, setAlias |
| Constructor Detail |
|---|
public Extension(JDBCFilterListener listener,
Val target,
Val arg,
ClassMapping candidate)
| Method Detail |
|---|
public ClassMetaData getMetaData()
Value
getMetaData in interface Valuepublic void setMetaData(ClassMetaData meta)
Value
setMetaData in interface Valuepublic boolean isVariable()
Value
isVariable in interface ValueisVariable in class AbstractValpublic boolean isAggregate()
Value
isAggregate in interface ValueisAggregate in class AbstractValpublic Class getType()
ValueObject if
the type is unknown.
getType in interface Valuepublic void setImplicitType(Class type)
ValueObject from Value.getType().
setImplicitType in interface Value
public ExpState initialize(Select sel,
ExpContext ctx,
int flags)
Val
initialize in interface Val
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 ExpselectColumns 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 Valpublic void acceptVisit(ExpressionVisitor visitor)
Value
acceptVisit in interface ExpressionacceptVisit in interface ValueacceptVisit in class AbstractVal
public ExpState initialize(Select sel,
ExpContext ctx,
Map contains)
Exp
initialize in interface Expcontains - map of relation paths to the number of times
the paths appear in a contains() expression;
used to ensure paths used for contains() within
the same AND expression used different aliases
public void appendTo(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
Exp
appendTo in interface Exp
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