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java.lang.Objectorg.apache.openjpa.jdbc.kernel.exps.AbstractVal
org.apache.openjpa.jdbc.kernel.exps.Const
org.apache.openjpa.jdbc.kernel.exps.ConstPath
class ConstPath
A field traversal starting with a constant filter parameter.
| Nested Class Summary |
|---|
| Nested classes/interfaces inherited from class org.apache.openjpa.jdbc.kernel.exps.Const |
|---|
Const.ConstExpState |
| Field Summary |
|---|
| Fields inherited from class org.apache.openjpa.jdbc.kernel.exps.AbstractVal |
|---|
FALSE, 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 | |
|---|---|
ConstPath(Const constant)
Constructor. |
|
| Method Summary | |
|---|---|
void |
acceptVisit(ExpressionVisitor visitor)
Accept a visit from a tree visitor. |
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. |
void |
get(FieldMetaData field,
boolean nullTraversal)
Traverse into the given field of the current object, and update the current object to that field value. |
void |
get(FieldMetaData fmd,
XMLMetaData meta)
Traverse into the given field that maps to xml column, and update the current object to that field value. |
void |
get(XMLMetaData meta,
String name)
Traverse into the gevin xpath name of the current object, and update the current object to that xpath field. |
String |
getCorrelationVar()
|
void |
getKey()
|
String |
getSchemaAlias()
|
Object |
getSQLValue(Select sel,
ExpContext ctx,
ExpState state)
Return the SQL value of this constant. |
Class |
getType()
Return the expected type for this value, or Object if
the type is unknown. |
Object |
getValue(ExpContext ctx,
ExpState state)
Return the value of this constant. |
Object |
getValue(Object[] params)
Return the value for this constant given the specified parameters. |
XMLMetaData |
getXmlMapping()
Return the current XPath's xmlmapping metadata. |
ExpState |
initialize(Select sel,
ExpContext ctx,
int flags)
Initialize the value. |
FieldMetaData |
last()
Return the last field in the path, or null if the path does not not contain a final field. |
void |
setImplicitType(Class type)
Set the implicit type of the value, based on how it is used in the filter. |
void |
setSchemaAlias(String schemaAlias)
Set the schema alias (the identification variable) this path is begin with. |
void |
setSubqueryContext(Context conext,
String correlationVar)
|
| Methods inherited from class org.apache.openjpa.jdbc.kernel.exps.Const |
|---|
appendIsEmpty, appendIsNotEmpty, appendIsNotNull, appendIsNull, appendSize, getMetaData, groupBy, isSQLValueNull, length, load, orderBy, select, selectColumns, setMetaData |
| Methods inherited from class org.apache.openjpa.jdbc.kernel.exps.AbstractVal |
|---|
appendIndex, 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 |
| Methods inherited from interface org.apache.openjpa.jdbc.kernel.exps.Val |
|---|
appendIndex, appendIsEmpty, appendIsNotEmpty, appendIsNotNull, appendIsNull, appendSize, appendType, getId, getSelectAs, groupBy, length, load, orderBy, select, selectColumns, toDataStoreValue |
| Methods inherited from interface org.apache.openjpa.kernel.exps.Value |
|---|
getAlias, getMetaData, getName, getPath, isAggregate, isVariable, isXPath, setAlias, setMetaData |
| Constructor Detail |
|---|
public ConstPath(Const constant)
| Method Detail |
|---|
public Class getType()
ValueObject if
the type is unknown.
getType in interface Valuepublic void setImplicitType(Class type)
ValueObject from Value.getType().
setImplicitType in interface Value
public void get(FieldMetaData field,
boolean nullTraversal)
Path
get in interface PathnullTraversal - if true, allow traversal through a null fieldpublic void getKey()
getKey in interface JDBCPathpublic FieldMetaData last()
Path
last in interface Pathpublic Object getValue(Object[] params)
Constant
getValue in interface Constant
public Object getValue(ExpContext ctx,
ExpState state)
Const
getValue in class Const
public Object getSQLValue(Select sel,
ExpContext ctx,
ExpState state)
Const
getSQLValue in class Const
public ExpState initialize(Select sel,
ExpContext ctx,
int flags)
Val
initialize in interface Valinitialize in class Const
public void calculateValue(Select sel,
ExpContext ctx,
ExpState state,
Val other,
ExpState otherState)
Vallength or any append methods.
calculateValue in interface ValcalculateValue in class Constother - the value being compared to, or null if not a comparison
public void appendTo(Select sel,
ExpContext ctx,
ExpState state,
SQLBuffer sql,
int index)
Valindexth SQL element to the given buffer.
appendTo in interface Valpublic void acceptVisit(ExpressionVisitor visitor)
Value
acceptVisit in interface ValueacceptVisit in class AbstractVal
public void get(FieldMetaData fmd,
XMLMetaData meta)
Path
get in interface Pathfmd - field maps to xml columnmeta - associated xml mapping
public void get(XMLMetaData meta,
String name)
Path
get in interface Pathpublic XMLMetaData getXmlMapping()
Path
getXmlMapping in interface Pathpublic void setSchemaAlias(String schemaAlias)
Path
setSchemaAlias in interface Pathpublic String getSchemaAlias()
getSchemaAlias in interface Path
public void setSubqueryContext(Context conext,
String correlationVar)
setSubqueryContext in interface Pathpublic String getCorrelationVar()
getCorrelationVar in interface Path
|
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