org.apache.openjpa.kernel.exps
Class Context

java.lang.Object
  org.apache.openjpa.kernel.exps.Context

All Implemented Interfaces:

Serializable

public class Context
extends Object
implements Serializable

JPQL / Criteria Query Context

Since:

2.0

See Also:

Serialized Form

Field Summary

protected int	aliasCount
Context	cloneFrom
Expression	from
ClassMetaData	meta
JPQLExpressionBuilder.ParsedJPQL	parsed
String	schemaAlias
Subquery	subquery

Constructor Summary

Context(JPQLExpressionBuilder.ParsedJPQL parsed, Subquery subquery, Context parent)

Method Summary

void	addSchema(String id, ClassMetaData meta)
void	addSubselContext(Context sub) Register the subquery context in this context.
void	addVariable(String id, Value var)
Context	findContext(String alias) Given an alias find the context of its associated variable where it is defined.
Value	findVariable(String alias) Given an alias find the variable in JPQL contexts.
Context	getParent()
ClassMetaData	getSchema(String id)
Map<String,ClassMetaData>	getSchemas()
Object	getSelect() Returns the select associated with this context.
Subquery	getSubquery() Returns the subquery in this context.
List<Context>	getSubselContexts() Returns the subquery context.
Value	getVariable(String alias) Given an alias and return its associated variable.
Map<String,Value>	getVariables()
ClassMetaData	meta()
int	nextAlias() Returns next table alias to be created.
void	resetAliasCount() Reset alias count for prepared query cache
String	schemaAlias()
void	setSchemas(Map<String,ClassMetaData> schemas)
void	setSelect(Object select) Register the select for this context.
void	setSubquery(Subquery subquery)
void	setVariables(Map<String,Value> variables)
Subquery	subquery()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

parsed

public final JPQLExpressionBuilder.ParsedJPQL parsed

meta

public ClassMetaData meta

schemaAlias

public String schemaAlias

subquery

public Subquery subquery

from

public Expression from

cloneFrom

public Context cloneFrom

aliasCount

protected int aliasCount

Constructor Detail

Context

public Context(JPQLExpressionBuilder.ParsedJPQL parsed,
               Subquery subquery,
               Context parent)

Method Detail

setSubquery

public void setSubquery(Subquery subquery)

meta

public ClassMetaData meta()

schemaAlias

public String schemaAlias()

subquery

public Subquery subquery()

nextAlias

public int nextAlias()

Returns next table alias to be created.

Returns:

resetAliasCount

public void resetAliasCount()

Reset alias count for prepared query cache

setSelect

public void setSelect(Object select)

Register the select for this context.

Parameters:

select -

getSelect

public Object getSelect()

Returns the select associated with this context.

Returns:

addSubselContext

public void addSubselContext(Context sub)

Register the subquery context in this context.

Parameters:

sub -

getSubselContexts

public List<Context> getSubselContexts()

Returns the subquery context.

Returns:

getSubquery

public Subquery getSubquery()

Returns the subquery in this context.

Returns:

getParent

public Context getParent()

addVariable

public void addVariable(String id,
                        Value var)

getVariables

public Map<String,Value> getVariables()

setVariables

public void setVariables(Map<String,Value> variables)

addSchema

public void addSchema(String id,
                      ClassMetaData meta)

getSchema

public ClassMetaData getSchema(String id)

getSchemas

public Map<String,ClassMetaData> getSchemas()

setSchemas

public void setSchemas(Map<String,ClassMetaData> schemas)

getVariable

public Value getVariable(String alias)

Given an alias and return its associated variable.

Parameters:

alias -

Returns:

findContext

public Context findContext(String alias)

Given an alias find the context of its associated variable where it is defined.

Parameters:

alias -

Returns:

findVariable

public Value findVariable(String alias)

Given an alias find the variable in JPQL contexts.

Parameters:

alias -

Returns: