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java.lang.Objectorg.apache.openjpa.jdbc.kernel.exps.AbstractVal
abstract class AbstractVal
Abstract value for easy extension.
| Field Summary | |
|---|---|
protected static String |
FALSE
|
protected static String |
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 | |
|---|---|
AbstractVal()
|
|
| 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 |
appendType(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
Append the SQL checking the type of this value. |
String |
getAlias()
Return select item alias |
int |
getId()
|
String |
getName()
|
Path |
getPath()
|
Value |
getSelectAs()
Return 'this' concrete class if alias is set, otherwise null |
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. |
void |
setAlias(String alias)
Set select item alias |
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 |
| Methods inherited from interface org.apache.openjpa.jdbc.kernel.exps.Val |
|---|
appendTo, calculateValue, groupBy, initialize, length, load, orderBy, select, selectColumns |
| Methods inherited from interface org.apache.openjpa.kernel.exps.Value |
|---|
getMetaData, getType, setImplicitType, setMetaData |
| Field Detail |
|---|
protected static final String TRUE
protected static final String FALSE
| Constructor Detail |
|---|
AbstractVal()
| Method Detail |
|---|
public boolean isVariable()
Value
isVariable in interface Valuepublic boolean isAggregate()
Value
isAggregate in interface Valuepublic boolean isXPath()
Value
isXPath in interface Value
public Object toDataStoreValue(Select sel,
ExpContext ctx,
ExpState state,
Object val)
Val
toDataStoreValue in interface Val
public void appendIsEmpty(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
Val
appendIsEmpty in interface Val
public void appendIsNotEmpty(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
Val
appendIsNotEmpty in interface Val
public void appendIsNull(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
Val
appendIsNull in interface Val
public void appendIsNotNull(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
Val
appendIsNotNull in interface Val
public void appendIndex(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
Val
appendIndex in interface Val
public void appendType(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
Val
appendType in interface Val
public void appendSize(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql)
Val
appendSize in interface Valpublic void acceptVisit(ExpressionVisitor visitor)
Value
acceptVisit in interface Valuepublic int getId()
getId in interface Valpublic String getAlias()
Value
getAlias in interface Valuepublic void setAlias(String alias)
Value
setAlias in interface Valuepublic Value getSelectAs()
Value
getSelectAs in interface ValgetSelectAs in interface Valuepublic Path getPath()
getPath in interface Valuepublic String getName()
getName in interface Value
|
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