org.apache.openjpa.jdbc.kernel.exps
Class MapEntry
java.lang.Object
org.apache.openjpa.jdbc.kernel.exps.AbstractVal
org.apache.openjpa.jdbc.kernel.exps.MapEntry
- All Implemented Interfaces:
- Serializable, Val, Value
public class MapEntry
- extends AbstractVal
Returns the Map.Entry of a map value.
- Since:
- 2.0.0
- Author:
- Catalina Wei
- See Also:
- Serialized Form
| 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 |
|
Method Summary |
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. |
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 |
acceptVisit, appendIndex, appendIsEmpty, appendIsNotEmpty, appendIsNotNull, appendIsNull, appendSize, appendType, getAlias, getId, getName, getPath, getSelectAs, isAggregate, isVariable, isXPath, setAlias, toDataStoreValue |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
MapEntry
public MapEntry(Val key,
Val val)
- Constructor. Provide the map value to operate on.
appendTo
public void appendTo(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql,
int index)
- Description copied from interface:
Val
- Append the
indexth SQL element to the given buffer.
calculateValue
public void calculateValue(Select sel,
ExpContext ctx,
ExpState state,
Val other,
ExpState otherState)
- Description copied from interface:
Val
- Calculate and cache the SQL for this value. This method is called
before
length or any append methods.
other - the value being compared to, or null if not a comparison
groupBy
public void groupBy(Select sel,
ExpContext ctx,
ExpState state)
- Description copied from interface:
Val
- Group by this value.
initialize
public ExpState initialize(Select sel,
ExpContext ctx,
int flags)
- Description copied from interface:
Val
- Initialize the value. This method should recursively initialize any
sub-values.
length
public int length(Select sel,
ExpContext ctx,
ExpState state)
- Description copied from interface:
Val
- Return the number of SQL elements in this value.
load
public Object load(ExpContext ctx,
ExpState state,
Result res)
throws SQLException
- Description copied from interface:
Val
- Load the data for this value.
- Throws:
SQLException
orderBy
public void orderBy(Select sel,
ExpContext ctx,
ExpState state,
boolean asc)
- Description copied from interface:
Val
- Order by this value.
select
public void select(Select sel,
ExpContext ctx,
ExpState state,
boolean pks)
- Description copied from interface:
Val
- Select the data for this value.
selectColumns
public void selectColumns(Select sel,
ExpContext ctx,
ExpState state,
boolean pks)
- Description copied from interface:
Val
- Select just the columns for this value.
getMetaData
public ClassMetaData getMetaData()
- Description copied from interface:
Value
- Return any associated persistent type.
getType
public Class getType()
- Description copied from interface:
Value
- Return the expected type for this value, or
Object if
the type is unknown.
setImplicitType
public void setImplicitType(Class type)
- Description copied from interface:
Value
- Set the implicit type of the value, based on how it is used in the
filter. This method is only called on values who return
Object from Value.getType().
setMetaData
public void setMetaData(ClassMetaData meta)
- Description copied from interface:
Value
- Associate a persistent type with this value.
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