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 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. |
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
index
th 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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