Package org.apache.openjpa.persistence.query

Class CaseExpressionImpl

java.lang.Object

org.apache.openjpa.persistence.query.CaseExpressionImpl

All Implemented Interfaces:

Serializable, CaseExpression, Visitable

public class CaseExpressionImpl
extends Object
implements CaseExpression, Visitable

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
CaseExpressionImpl()
CaseExpressionImpl(Object caseOperand)

Method Summary

Modifier and Type	Method	Description
String	asExpression(org.apache.openjpa.persistence.query.AliasContext ctx)	Get a JPQL fragment as used in WHERE clause.
String	asJoinable(org.apache.openjpa.persistence.query.AliasContext ctx)	Gets the string representation in FROM clause.
String	asProjection(org.apache.openjpa.persistence.query.AliasContext ctx)	Gets the string representation in SELECT projection.
Expression	elseCase(Class arg)	Add else to a case expression.
Expression	elseCase(Enum<?> arg)	Add else to a case expression.
Expression	elseCase(Number arg)	Add else to a case expression.
Expression	elseCase(String arg)	Add else to a case expression.
Expression	elseCase(Calendar arg)	Add else to a case expression.
Expression	elseCase(Date arg)	Add else to a case expression.
Expression	elseCase(Expression arg)	Add else to a case expression.
String	getAliasHint(org.apache.openjpa.persistence.query.AliasContext ctx)	Gets the hint to be used while creating alias.
CaseExpression	then(Class then)	Add a then clause to a general or simple case expression.
CaseExpression	then(Enum<?> then)	Add a then clause to a general or simple case expression.
CaseExpression	then(Number then)	Add a then clause to a general or simple case expression.
CaseExpression	then(String then)	Add a then clause to a general or simple case expression.
CaseExpression	then(Calendar then)	Add a then clause to a general or simple case expression.
CaseExpression	then(Date then)	Add a then clause to a general or simple case expression.
CaseExpression	then(Expression then)	Add a then clause to a general or simple case expression.
CaseExpression	when(Class when)	Add a when clause to a simple case expression.
CaseExpression	when(Enum<?> when)	Add a when clause to a simple case expression.
CaseExpression	when(Number when)	Add a when clause to a simple case expression.
CaseExpression	when(String when)	Add a when clause to a simple case expression.
CaseExpression	when(Calendar when)	Add a when clause to a simple case expression.
CaseExpression	when(Date when)	Add a when clause to a simple case expression.
CaseExpression	when(Expression when)	Add a when clause to a simple case expression.
CaseExpression	when(Predicate when)	Add a when predicate clause to a general case expression.

Methods inherited from class java.lang.Object

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

Constructor Details

CaseExpressionImpl

public CaseExpressionImpl()

CaseExpressionImpl

public CaseExpressionImpl(Object caseOperand)

Method Details

elseCase

public Expression elseCase(Expression arg)

Description copied from interface: CaseExpression

Add else to a case expression. A case expression must have an else clause.

Specified by:

elseCase in interface CaseExpression

Parameters:

arg - - corresponds to the result of the case expression if the when condition is not satisfied

Returns:

Expression corresponding to the case expression with the added clause

elseCase

public Expression elseCase(String arg)

Description copied from interface: CaseExpression

Add else to a case expression. A case expression must have an else clause.

Specified by:

elseCase in interface CaseExpression

Parameters:

arg - - corresponds to the result of the case expression if the when condition is not satisfied

Returns:

Expression corresponding to the case expression with the added clause

elseCase

public Expression elseCase(Number arg)

Description copied from interface: CaseExpression

Add else to a case expression. A case expression must have an else clause.

Specified by:

elseCase in interface CaseExpression

Parameters:

arg - - corresponds to the result of the case expression if the when condition is not satisfied

Returns:

Expression corresponding to the case expression with the added clause

elseCase

public Expression elseCase(Date arg)

Description copied from interface: CaseExpression

Add else to a case expression. A case expression must have an else clause.

Specified by:

elseCase in interface CaseExpression

Parameters:

arg - - corresponds to the result of the case expression if the when condition is not satisfied

Returns:

Expression corresponding to the case expression with the added clause

elseCase

public Expression elseCase(Calendar arg)

Description copied from interface: CaseExpression

Add else to a case expression. A case expression must have an else clause.

Specified by:

elseCase in interface CaseExpression

Parameters:

arg - - corresponds to the result of the case expression if the when condition is not satisfied

Returns:

Expression corresponding to the case expression with the added clause

elseCase

public Expression elseCase(Class arg)

Description copied from interface: CaseExpression

Add else to a case expression. A case expression must have an else clause.

Specified by:

elseCase in interface CaseExpression

Parameters:

arg - - corresponds to the result of the case expression if the when condition is not satisfied

Returns:

Expression corresponding to the case expression with the added clause

elseCase

public Expression elseCase(Enum<?> arg)

Description copied from interface: CaseExpression

Add else to a case expression. A case expression must have an else clause.

Specified by:

elseCase in interface CaseExpression

Parameters:

arg - - corresponds to the result of the case expression if the when condition is not satisfied

Returns:

Expression corresponding to the case expression with the added clause

then

public CaseExpression then(Expression then)

Description copied from interface: CaseExpression

Add a then clause to a general or simple case expression. The then clause specifies the result corresponding to the immediately preceding when. Clauses are evaluated in the order added.

Specified by:

then in interface CaseExpression

Parameters:

then - - corresponds to the result of the case expression if the when is satisfied

Returns:

CaseExpression corresponding to the case with the added then clause

then

public CaseExpression then(Number then)

Description copied from interface: CaseExpression

Add a then clause to a general or simple case expression. The then clause specifies the result corresponding to the immediately preceding when. Clauses are evaluated in the order added.

Specified by:

then in interface CaseExpression

Parameters:

then - - corresponds to the result of the case expression if the when is satisfied

Returns:

CaseExpression corresponding to the case with the added then clause

then

public CaseExpression then(String then)

Description copied from interface: CaseExpression

Add a then clause to a general or simple case expression. The then clause specifies the result corresponding to the immediately preceding when. Clauses are evaluated in the order added.

Specified by:

then in interface CaseExpression

Parameters:

then - - corresponds to the result of the case expression if the when is satisfied

Returns:

CaseExpression corresponding to the case with the added then clause

then

public CaseExpression then(Date then)

Description copied from interface: CaseExpression

Add a then clause to a general or simple case expression. The then clause specifies the result corresponding to the immediately preceding when. Clauses are evaluated in the order added.

Specified by:

then in interface CaseExpression

Parameters:

then - - corresponds to the result of the case expression if the when is satisfied

Returns:

CaseExpression corresponding to the case with the added then clause

then

public CaseExpression then(Calendar then)

Description copied from interface: CaseExpression

Add a then clause to a general or simple case expression. The then clause specifies the result corresponding to the immediately preceding when. Clauses are evaluated in the order added.

Specified by:

then in interface CaseExpression

Parameters:

then - - corresponds to the result of the case expression if the when is satisfied

Returns:

CaseExpression corresponding to the case with the added then clause

then

public CaseExpression then(Class then)

Description copied from interface: CaseExpression

Add a then clause to a general or simple case expression. The then clause specifies the result corresponding to the immediately preceding when. Clauses are evaluated in the order added.

Specified by:

then in interface CaseExpression

Parameters:

then - - corresponds to the result of the case expression if the when is satisfied

Returns:

CaseExpression corresponding to the case with the added then clause

then

public CaseExpression then(Enum<?> then)

Description copied from interface: CaseExpression

Add a then clause to a general or simple case expression. The then clause specifies the result corresponding to the immediately preceding when. Clauses are evaluated in the order added.

Specified by:

then in interface CaseExpression

Parameters:

then - - corresponds to the result of the case expression if the when is satisfied

Returns:

CaseExpression corresponding to the case with the added then clause

when

public CaseExpression when(Predicate when)

Description copied from interface: CaseExpression

Add a when predicate clause to a general case expression. The when predicate must be followed by the corresponding then case expression that specifies the result of the specific case. Clauses are evaluated in the order added.

Specified by:

when in interface CaseExpression

Parameters:

when - - corresponds to the evaluation condition for the specific case

Returns:

CaseExpression corresponding to the case with the added when clause

when

public CaseExpression when(Expression when)

Description copied from interface: CaseExpression

Add a when clause to a simple case expression. The when case expression must be followed by the corresponding then case expression that specifies the result of the specific case. Clauses are evaluated in the order added

Specified by:

when in interface CaseExpression

Parameters:

when - - corresponds to the value against which the case operand of the simple case is tested

Returns:

CaseExpression corresponding to the case with the added clause

when

public CaseExpression when(Number when)

Description copied from interface: CaseExpression

Add a when clause to a simple case expression. The when case expression must be followed by the corresponding then case expression that specifies the result of the specific case. Clauses are evaluated in the order added

Specified by:

when in interface CaseExpression

Parameters:

when - - corresponds to the value against which the case operand of the simple case is tested

Returns:

CaseExpression corresponding to the case with the added clause

when

public CaseExpression when(String when)

Description copied from interface: CaseExpression

Add a when clause to a simple case expression. The when case expression must be followed by the corresponding then case expression that specifies the result of the specific case. Clauses are evaluated in the order added

Specified by:

when in interface CaseExpression

Parameters:

when - - corresponds to the value against which the case operand of the simple case is tested

Returns:

CaseExpression corresponding to the case with the added clause

when

public CaseExpression when(Date when)

Description copied from interface: CaseExpression

Add a when clause to a simple case expression. The when case expression must be followed by the corresponding then case expression that specifies the result of the specific case. Clauses are evaluated in the order added

Specified by:

when in interface CaseExpression

Parameters:

when - - corresponds to the value against which the case operand of the simple case is tested

Returns:

CaseExpression corresponding to the case with the added clause

when

public CaseExpression when(Calendar when)

Description copied from interface: CaseExpression

Add a when clause to a simple case expression. The when case expression must be followed by the corresponding then case expression that specifies the result of the specific case. Clauses are evaluated in the order added

Specified by:

when in interface CaseExpression

Parameters:

when - - corresponds to the value against which the case operand of the simple case is tested

Returns:

CaseExpression corresponding to the case with the added clause

when

public CaseExpression when(Class when)

Description copied from interface: CaseExpression

Add a when clause to a simple case expression. The when case expression must be followed by the corresponding then case expression that specifies the result of the specific case. Clauses are evaluated in the order added

Specified by:

when in interface CaseExpression

Parameters:

when - - corresponds to the value against which the case operand of the simple case is tested

Returns:

CaseExpression corresponding to the case with the added clause

when

public CaseExpression when(Enum<?> when)

Description copied from interface: CaseExpression

Add a when clause to a simple case expression. The when case expression must be followed by the corresponding then case expression that specifies the result of the specific case. Clauses are evaluated in the order added

Specified by:

when in interface CaseExpression

Parameters:

when - - corresponds to the value against which the case operand of the simple case is tested

Returns:

CaseExpression corresponding to the case with the added clause

asExpression

public String asExpression(org.apache.openjpa.persistence.query.AliasContext ctx)

Description copied from interface: Visitable

Get a JPQL fragment as used in WHERE clause.

Specified by:

asExpression in interface Visitable

asProjection

public String asProjection(org.apache.openjpa.persistence.query.AliasContext ctx)

Description copied from interface: Visitable

Gets the string representation in SELECT projection.

Specified by:

asProjection in interface Visitable

asJoinable

public String asJoinable(org.apache.openjpa.persistence.query.AliasContext ctx)

Description copied from interface: Visitable

Gets the string representation in FROM clause.

Specified by:

asJoinable in interface Visitable

getAliasHint

public String getAliasHint(org.apache.openjpa.persistence.query.AliasContext ctx)

Description copied from interface: Visitable

Gets the hint to be used while creating alias.

Specified by:

getAliasHint in interface Visitable