org.apache.openjpa.jdbc.kernel.exps
Class MapEntry
java.lang.Object
org.apache.openjpa.jdbc.kernel.exps.MapEntry
- All Implemented Interfaces:
- Serializable, Val, Value
public class MapEntry
- extends Object
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 |
acceptVisit(ExpressionVisitor visitor)
Accept a visit from a tree visitor. |
void |
appendIndex(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
Append the SQL checking the index of this value. |
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 |
appendIsNotNull(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
Append the SQL testing whether this value is not null to the given
buffer. |
void |
appendIsNull(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
Append the SQL testing whether this value is null 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 |
appendType(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
Append the SQL checking the type of this value. |
void |
calculateValue(Select sel,
ExpContext ctx,
ExpState state,
Val other,
ExpState otherState)
Calculate and cache the SQL for this value. |
String |
getAlias()
Return select item alias |
int |
getId()
|
ClassMetaData |
getMetaData()
Return any associated persistent type. |
String |
getName()
|
Path |
getPath()
|
Value |
getSelectAs()
Return 'this' concrete class if alias is set, otherwise null |
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. |
boolean |
isAggregate()
Return true if this value is an aggregate. |
boolean |
isVariable()
Return true if this value is a variable. |
boolean |
isXPath()
Return true if this value is an XML Path. |
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 |
setAlias(String alias)
Set select item alias |
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. |
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 java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
TRUE
protected static final String TRUE
- See Also:
- Constant Field Values
FALSE
protected static final String FALSE
- See Also:
- Constant Field Values
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.
isVariable
public boolean isVariable()
- Description copied from interface:
Value
- Return true if this value is a variable.
- Specified by:
isVariable in interface Value
isAggregate
public boolean isAggregate()
- Description copied from interface:
Value
- Return true if this value is an aggregate.
- Specified by:
isAggregate in interface Value
isXPath
public boolean isXPath()
- Description copied from interface:
Value
- Return true if this value is an XML Path.
- Specified by:
isXPath in interface Value
toDataStoreValue
public Object toDataStoreValue(Select sel,
ExpContext ctx,
ExpState state,
Object val)
- Description copied from interface:
Val
- Return the datastore value of the given object in the context of this
value.
- Specified by:
toDataStoreValue in interface Val
appendIsEmpty
public void appendIsEmpty(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
- Description copied from interface:
Val
- Append the SQL testing whether this value is empty to the given buffer.
- Specified by:
appendIsEmpty in interface Val
appendIsNotEmpty
public void appendIsNotEmpty(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
- Description copied from interface:
Val
- Append the SQL testing whether this value is not empty to
the given buffer.
- Specified by:
appendIsNotEmpty in interface Val
appendIsNull
public void appendIsNull(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
- Description copied from interface:
Val
- Append the SQL testing whether this value is null to the given buffer.
- Specified by:
appendIsNull in interface Val
appendIsNotNull
public void appendIsNotNull(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
- Description copied from interface:
Val
- Append the SQL testing whether this value is not null to the given
buffer.
- Specified by:
appendIsNotNull in interface Val
appendIndex
public void appendIndex(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
- Description copied from interface:
Val
- Append the SQL checking the index of this value.
- Specified by:
appendIndex in interface Val
appendType
public void appendType(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
- Description copied from interface:
Val
- Append the SQL checking the type of this value.
- Specified by:
appendType in interface Val
appendSize
public void appendSize(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
- Description copied from interface:
Val
- Append the SQL checking the size of this value.
- Specified by:
appendSize in interface Val
acceptVisit
public void acceptVisit(ExpressionVisitor visitor)
- Description copied from interface:
Value
- Accept a visit from a tree visitor.
- Specified by:
acceptVisit in interface Value
getId
public int getId()
- Specified by:
getId in interface Val
getAlias
public String getAlias()
- Description copied from interface:
Value
- Return select item alias
- Specified by:
getAlias in interface Value
setAlias
public void setAlias(String alias)
- Description copied from interface:
Value
- Set select item alias
- Specified by:
setAlias in interface Value
getSelectAs
public Value getSelectAs()
- Description copied from interface:
Value
- Return 'this' concrete class if alias is set, otherwise null
- Specified by:
getSelectAs in interface Val- Specified by:
getSelectAs in interface Value
getPath
public Path getPath()
- Specified by:
getPath in interface Value
getName
public String getName()
- Specified by:
getName in interface Value
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