class Extension extends AbstractVal implements Val, Exp
FALSE, TRUE
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 and Description |
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Extension(JDBCFilterListener listener,
Val target,
Val arg,
ClassMapping candidate)
Constructor.
|
Modifier and Type | Method and Description |
---|---|
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
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.
|
ClassMetaData |
getMetaData()
Return any associated persistent type.
|
java.lang.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,
java.util.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.
|
java.lang.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(java.lang.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.
|
appendIndex, appendIsEmpty, appendIsNotEmpty, appendIsNotNull, appendIsNull, appendSize, appendType, getAlias, getId, getName, getPath, getSelectAs, isXPath, setAlias, toDataStoreValue
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
appendIndex, appendIsEmpty, appendIsNotEmpty, appendIsNotNull, appendIsNull, appendSize, appendType, getId, getSelectAs, toDataStoreValue
public Extension(JDBCFilterListener listener, Val target, Val arg, ClassMapping candidate)
public ClassMetaData getMetaData()
Value
getMetaData
in interface Value
public void setMetaData(ClassMetaData meta)
Value
setMetaData
in interface Value
public boolean isVariable()
Value
isVariable
in interface Value
isVariable
in class AbstractVal
public boolean isAggregate()
Value
isAggregate
in interface Value
isAggregate
in class AbstractVal
public java.lang.Class getType()
Value
Object
if
the type is unknown.public void setImplicitType(java.lang.Class type)
Value
Object
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
public void selectColumns(Select sel, ExpContext ctx, ExpState state, boolean pks)
Val
selectColumns
in interface Exp
selectColumns
in interface Val
public void groupBy(Select sel, ExpContext ctx, ExpState state)
Val
public void orderBy(Select sel, ExpContext ctx, ExpState state, boolean asc)
Val
public java.lang.Object load(ExpContext ctx, ExpState state, Result res) throws java.sql.SQLException
Val
public void calculateValue(Select sel, ExpContext ctx, ExpState state, Val other, ExpState otherState)
Val
length
or any append
methods.calculateValue
in interface Val
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 Expression
acceptVisit
in interface Value
acceptVisit
in class AbstractVal
public ExpState initialize(Select sel, ExpContext ctx, java.util.Map contains)
Exp
initialize
in interface Exp
contains
- 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 aliasesCopyright © 2006-2013 Apache Software Foundation. All Rights Reserved.