org.apache.openjpa.persistence.query
Class QueryDefinitionImpl

java.lang.Object
  org.apache.openjpa.persistence.query.AbstractVisitable
      org.apache.openjpa.persistence.query.ExpressionImpl
          org.apache.openjpa.persistence.query.QueryDefinitionImpl

All Implemented Interfaces:

Serializable, Expression, OrderByItem, PredicateOperand, QueryDefinition, SelectItem, Subquery, Visitable

public class QueryDefinitionImpl
extends ExpressionImpl
implements QueryDefinition, Expression

Implements QueryDefinition.

Author:

Pinaki Poddar

See Also:

Serialized Form

Nested Class Summary

(package private) static class

QueryDefinitionImpl.DomainSorter

Field Summary

protected static Localizer

_loc

Fields inherited from class org.apache.openjpa.persistence.query.AbstractVisitable

CLOSE_BRACE, COMMA, EMPTY, OPEN_BRACE, SPACE

Constructor Summary

protected

QueryDefinitionImpl(QueryBuilderImpl builder)

Method Summary

protected <T extends AbstractDomainObject> T	addDomain(T path)
DomainObject	addRoot(Class cls) Root domain object has no parent, no path but a non-null Class.
DomainObject	addSubqueryRoot(PathExpression path) Add a root derived from a domain object of the containing query definition to a query definition used as a subquery.
Subquery	all() Use the query definition object in a subquery in an all expression.
Subquery	any() Use the query definition object in a subquery in an any expression.
String	asExpression(AliasContext ctx) Get a JPQL fragment as used in WHERE clause.
String	asProjection(AliasContext ctx) Gets the string representation in SELECT projection.
Expression	coalesce(Calendar... exp) coalesce This is equivalent to a case expression that returns null if all its arguments evaluate to null, and the value of its first non-null argument otherwise.
Expression	coalesce(Date... exp) coalesce This is equivalent to a case expression that returns null if all its arguments evaluate to null, and the value of its first non-null argument otherwise.
Expression	coalesce(Expression... exp) coalesce This is equivalent to a case expression that returns null if all its arguments evaluate to null, and the value of its first non-null argument otherwise.
Expression	coalesce(String... exp) coalesce This is equivalent to a case expression that returns null if all its arguments evaluate to null, and the value of its first non-null argument otherwise.
Expression	currentDate() Create an Expression corresponding to the current date on the database server at the time of query execution.
Expression	currentTime() Create an Expression corresponding to the current time on the database server at the time of query execution.
Expression	currentTimestamp() Create an Expression corresponding to the current timestamp on the database server at the time of query execution.
Predicate	exists() Use the query definition instance as a subquery in an exists predicate.
void	fillBuffer(String header, StringBuilder buffer, AliasContext ctx, List list, org.apache.openjpa.persistence.query.QueryDefinitionImpl.Visit visit)
void	fillBuffer(String header, StringBuilder buffer, AliasContext ctx, Predicate p)
CaseExpression	generalCase() Create an empty general case expression.
QueryDefinition	groupBy(List<PathExpression> pathExprList) Specify the items that are used to form groups over the query results.
QueryDefinition	groupBy(PathExpression... pathExprs) Specify the items that are used to form groups over the query results.
(package private) boolean	hasDomain(PathExpression path)
QueryDefinition	having(Predicate predicate) Specify the restrictions over the groups of a query.
Expression	literal(boolean b) Create an Expression corresponding to a boolean value.
Expression	literal(Calendar c) Create an Expression corresponding to a Calendar value.
Expression	literal(char c) Create an Expression corresponding to a character value.
Expression	literal(Class cls) Create an Expression corresponding to an entity class.
Expression	literal(Date d) Create an Expression corresponding to a Date value.
Expression	literal(Enum<?> e) Create an Expression corresponding to an enum.
Expression	literal(Number n) Create an Expression corresponding to a numeric value.
Expression	literal(String s) Create an Expression corresponding to a String value.
SelectItem	newInstance(Class cls, SelectItem... args) Specify that a constructor for the given class is to be applied to the corresponding query results after the query is executed.
Expression	nullif(Calendar arg1, Calendar arg2) nullif This is equivalent to a case expression that tests whether its arguments are equal, returning null if they are and the value of the first expression if they are not.
Expression	nullif(Class arg1, Class arg2) nullif This is equivalent to a case expression that tests whether its arguments are equal, returning null if they are and the value of the first expression if they are not.
Expression	nullif(Date arg1, Date arg2) nullif This is equivalent to a case expression that tests whether its arguments are equal, returning null if they are and the value of the first expression if they are not.
Expression	nullif(Enum<?> arg1, Enum<?> arg2) nullif This is equivalent to a case expression that tests whether its arguments are equal, returning null if they are and the value of the first expression if they are not.
Expression	nullif(Expression exp1, Expression exp2) nullif This is equivalent to a case expression that tests whether its arguments are equal, returning null if they are and the value of the first expression if they are not.
Expression	nullif(Number arg1, Number arg2) nullif This is equivalent to a case expression that tests whether its arguments are equal, returning null if they are and the value of the first expression if they are not.
Expression	nullif(String arg1, String arg2) nullif This is equivalent to a case expression that tests whether its arguments are equal, returning null if they are and the value of the first expression if they are not.
Expression	nullLiteral() Create an Expression corresponding to a null value.
QueryDefinition	orderBy(List<OrderByItem> orderByItemList) Specify the items of the select list that are used in ordering the query results.
QueryDefinition	orderBy(OrderByItem... orderByItems) Specify the items of the select list that are used in ordering the query results.
Expression	param(String name) Specify use of a parameter of the given name.
Predicate	predicate(boolean b) Create a predicate value from the given boolean.
QueryDefinition	select(List<SelectItem> items) Specify the objects / values to be returned.
QueryDefinition	select(SelectItem... items) Specify the objects / values to be returned.
QueryDefinition	selectDistinct(List<SelectItem> items) Specify the objects / values to be returned.
QueryDefinition	selectDistinct(SelectItem... items) Specify the objects / values to be returned.
CaseExpression	simpleCase(Calendar caseOperand) Create a simple case expression with the given case operand.
CaseExpression	simpleCase(Class caseOperand) Create a simple case expression with the given case operand.
CaseExpression	simpleCase(Date caseOperand) Create a simple case expression with the given case operand.
CaseExpression	simpleCase(Enum<?> caseOperand) Create a simple case expression with the given case operand.
CaseExpression	simpleCase(Expression caseOperand) Create a simple case expression with the given case operand.
CaseExpression	simpleCase(Number caseOperand) Create a simple case expression with the given case operand.
CaseExpression	simpleCase(String caseOperand) Create a simple case expression with the given case operand.
Subquery	some() Use the query definition object in a subquery in a some expression.
QueryDefinition	where(Predicate predicate) Modifies the query definition to restrict the result of the query according to the specified predicate.

Methods inherited from class org.apache.openjpa.persistence.query.ExpressionImpl

abs, asc, between, between, between, between, between, between, between, between, between, between, between, between, between, concat, concat, desc, dividedBy, dividedBy, equal, equal, equal, equal, equal, equal, equal, equal, getAliasHint, greaterEqual, greaterEqual, greaterEqual, greaterEqual, greaterEqual, greaterThan, greaterThan, greaterThan, greaterThan, greaterThan, in, in, in, in, in, in, isNull, length, lessEqual, lessEqual, lessEqual, lessEqual, lessEqual, lessThan, lessThan, lessThan, lessThan, lessThan, like, like, like, like, like, like, locate, locate, locate, locate, locate, locate, lower, member, minus, minus, minus, mod, mod, notEqual, notEqual, notEqual, notEqual, notEqual, notEqual, notEqual, notEqual, plus, plus, sqrt, substring, substring, substring, substring, substring, substring, times, times, trim, trim, trim, trim, trim, trim, upper

Methods inherited from class org.apache.openjpa.persistence.query.AbstractVisitable

asJoinable

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.persistence.query.PredicateOperand

between, between, between, between, between, between, between, between, between, between, between, between, between, equal, equal, equal, equal, equal, equal, equal, equal, greaterEqual, greaterEqual, greaterEqual, greaterEqual, greaterEqual, greaterThan, greaterThan, greaterThan, greaterThan, greaterThan, lessEqual, lessEqual, lessEqual, lessEqual, lessEqual, lessThan, lessThan, lessThan, lessThan, lessThan, like, like, like, like, like, like, notEqual, notEqual, notEqual, notEqual, notEqual, notEqual, notEqual, notEqual

Methods inherited from interface org.apache.openjpa.persistence.query.Expression

abs, concat, concat, dividedBy, dividedBy, in, in, in, in, in, in, isNull, length, locate, locate, locate, locate, locate, locate, lower, member, minus, minus, minus, mod, mod, plus, plus, sqrt, substring, substring, substring, substring, substring, substring, times, times, trim, trim, trim, trim, trim, trim, upper

Methods inherited from interface org.apache.openjpa.persistence.query.SelectItem

asc, desc

Methods inherited from interface org.apache.openjpa.persistence.query.Visitable

asJoinable

Field Detail

_loc

protected static Localizer _loc

Constructor Detail

QueryDefinitionImpl

protected QueryDefinitionImpl(QueryBuilderImpl builder)

Parameters:

builder -

Method Detail

addRoot

public DomainObject addRoot(Class cls)

Root domain object has no parent, no path but a non-null Class.

Specified by:

addRoot in interface QueryDefinition

Parameters:

cls - - an entity class

Returns:

DomainObject corresponding to the specified entity class.

addSubqueryRoot

public DomainObject addSubqueryRoot(PathExpression path)

Description copied from interface: QueryDefinition

Add a root derived from a domain object of the containing query definition to a query definition used as a subquery. Provides support for correlated subqueries. Joins against the resulting domain object do not affect the query domain of the containing query. The path expression must correspond to an entity class. The path expression must not be a domain object of the containing query.

Specified by:

addSubqueryRoot in interface QueryDefinition

Parameters:

path - - path expression corresponding to the domain object used to derive the subquery root.

Returns:

the subquery DomainObject

hasDomain

boolean hasDomain(PathExpression path)

addDomain

protected <T extends AbstractDomainObject> T addDomain(T path)

all

public Subquery all()

Description copied from interface: QueryDefinition

Use the query definition object in a subquery in an all expression.

Specified by:

all in interface QueryDefinition

Returns:

the resulting Subquery

any

public Subquery any()

Description copied from interface: QueryDefinition

Use the query definition object in a subquery in an any expression.

Specified by:

any in interface QueryDefinition

Returns:

the resulting Subquery

coalesce

public Expression coalesce(Expression... exp)

Description copied from interface: QueryDefinition

coalesce This is equivalent to a case expression that returns null if all its arguments evaluate to null, and the value of its first non-null argument otherwise.

Specified by:

coalesce in interface QueryDefinition

Parameters:

exp - - expressions to be used for testing against null

Returns:

Expression corresponding to the given coalesce expression

coalesce

public Expression coalesce(String... exp)

Description copied from interface: QueryDefinition

coalesce This is equivalent to a case expression that returns null if all its arguments evaluate to null, and the value of its first non-null argument otherwise.

Specified by:

coalesce in interface QueryDefinition

Parameters:

exp - - expressions to be used for testing against null

Returns:

Expression corresponding to the given coalesce expression

coalesce

public Expression coalesce(Date... exp)

Description copied from interface: QueryDefinition

coalesce This is equivalent to a case expression that returns null if all its arguments evaluate to null, and the value of its first non-null argument otherwise.

Specified by:

coalesce in interface QueryDefinition

Parameters:

exp - - expressions to be used for testing against null

Returns:

Expression corresponding to the given coalesce expression

coalesce

public Expression coalesce(Calendar... exp)

Description copied from interface: QueryDefinition

coalesce This is equivalent to a case expression that returns null if all its arguments evaluate to null, and the value of its first non-null argument otherwise.

Specified by:

coalesce in interface QueryDefinition

Parameters:

exp - - expressions to be used for testing against null

Returns:

Expression corresponding to the given coalesce expression

currentDate

public Expression currentDate()

Description copied from interface: QueryDefinition

Create an Expression corresponding to the current date on the database server at the time of query execution.

Specified by:

currentDate in interface QueryDefinition

Returns:

the corresponding Expression

currentTime

public Expression currentTime()

Description copied from interface: QueryDefinition

Create an Expression corresponding to the current time on the database server at the time of query execution.

Specified by:

currentTime in interface QueryDefinition

Returns:

the corresponding Expression

currentTimestamp

public Expression currentTimestamp()

Description copied from interface: QueryDefinition

Create an Expression corresponding to the current timestamp on the database server at the time of query execution.

Specified by:

currentTimestamp in interface QueryDefinition

Returns:

the corresponding Expression

exists

public Predicate exists()

Description copied from interface: QueryDefinition

Use the query definition instance as a subquery in an exists predicate.

Specified by:

exists in interface QueryDefinition

Returns:

the resulting predicate

generalCase

public CaseExpression generalCase()

Description copied from interface: QueryDefinition

Create an empty general case expression. A general case expression is of the form:

generalCase() .when(conditional-predicate).then(scalar-expression) .when(conditional-predicate).then(scalar-expression) ... .elseCase(scalar-expression)

Specified by:

generalCase in interface QueryDefinition

Returns:

empty general case expression

groupBy

public QueryDefinition groupBy(PathExpression... pathExprs)

Description copied from interface: QueryDefinition

Specify the items that are used to form groups over the query results. Replaces the previous group-by list, if any.

Specified by:

groupBy in interface QueryDefinition

Returns:

the modified QueryDefinition instance

groupBy

public QueryDefinition groupBy(List<PathExpression> pathExprList)

Description copied from interface: QueryDefinition

Specify the items that are used to form groups over the query results. Replaces the previous group-by list, if any.

Specified by:

groupBy in interface QueryDefinition

Returns:

the modified QueryDefinition instance

having

public QueryDefinition having(Predicate predicate)

Description copied from interface: QueryDefinition

Specify the restrictions over the groups of a query. Replaces the previous having restriction(s), if any.

Specified by:

having in interface QueryDefinition

Returns:

the modified QueryDefinition Instance

literal

public Expression literal(String s)

Description copied from interface: QueryDefinition

Create an Expression corresponding to a String value.

Specified by:

literal in interface QueryDefinition

Parameters:

s - - string value

Returns:

the corresponding Expression literal

literal

public Expression literal(Number n)

Description copied from interface: QueryDefinition

Create an Expression corresponding to a numeric value.

Specified by:

literal in interface QueryDefinition

Parameters:

n - - numeric value

Returns:

the corresponding Expression literal

literal

public Expression literal(boolean b)

Description copied from interface: QueryDefinition

Create an Expression corresponding to a boolean value.

Specified by:

literal in interface QueryDefinition

Parameters:

b - - boolean value

Returns:

the corresponding Expression literal

literal

public Expression literal(Calendar c)

Description copied from interface: QueryDefinition

Create an Expression corresponding to a Calendar value.

Specified by:

literal in interface QueryDefinition

Parameters:

c - - Calendar value

Returns:

the corresponding Expression literal

literal

public Expression literal(Date d)

Description copied from interface: QueryDefinition

Create an Expression corresponding to a Date value.

Specified by:

literal in interface QueryDefinition

Parameters:

d - - Date value

Returns:

the corresponding Expression literal

literal

public Expression literal(char c)

Description copied from interface: QueryDefinition

Create an Expression corresponding to a character value.

Specified by:

literal in interface QueryDefinition

Returns:

the corresponding Expression literal

literal

public Expression literal(Class cls)

Description copied from interface: QueryDefinition

Create an Expression corresponding to an entity class.

Specified by:

literal in interface QueryDefinition

Parameters:

cls - - entity class

Returns:

the corresponding Expression literal

literal

public Expression literal(Enum<?> e)

Description copied from interface: QueryDefinition

Create an Expression corresponding to an enum.

Specified by:

literal in interface QueryDefinition

Parameters:

e - - enum

Returns:

the corresponding Expression literal

nullLiteral

public Expression nullLiteral()

Description copied from interface: QueryDefinition

Create an Expression corresponding to a null value.

Specified by:

nullLiteral in interface QueryDefinition

Returns:

the corresponding Expression literal

newInstance

public SelectItem newInstance(Class cls,
                              SelectItem... args)

Description copied from interface: QueryDefinition

Specify that a constructor for the given class is to be applied to the corresponding query results after the query is executed. The class must have a constructor that accepts the Java argument types corresponding to the given select items.

Specified by:

newInstance in interface QueryDefinition

Parameters:

cls - - a class with the correponding constructor

args - - select items that correspond to result types that are valid as arguments to the constructor

nullif

public Expression nullif(Expression exp1,
                         Expression exp2)

Description copied from interface: QueryDefinition

nullif This is equivalent to a case expression that tests whether its arguments are equal, returning null if they are and the value of the first expression if they are not.

Specified by:

nullif in interface QueryDefinition

Returns:

Expression corresponding to the given nullif expression

nullif

public Expression nullif(Number arg1,
                         Number arg2)

Description copied from interface: QueryDefinition

nullif This is equivalent to a case expression that tests whether its arguments are equal, returning null if they are and the value of the first expression if they are not.

Specified by:

nullif in interface QueryDefinition

Returns:

Expression corresponding to the given nullif expression

nullif

public Expression nullif(String arg1,
                         String arg2)

Description copied from interface: QueryDefinition

nullif This is equivalent to a case expression that tests whether its arguments are equal, returning null if they are and the value of the first expression if they are not.

Specified by:

nullif in interface QueryDefinition

arg2 - Criteria API Java Persistence 2.0, Public Review Draft Criteria API Interfaces 10/31/08 158 JSR-317 Public Review Draft Sun Microsystems, Inc.

Returns:

Expression corresponding to the given nullif expression

nullif

public Expression nullif(Date arg1,
                         Date arg2)

Description copied from interface: QueryDefinition

nullif This is equivalent to a case expression that tests whether its arguments are equal, returning null if they are and the value of the first expression if they are not.

Specified by:

nullif in interface QueryDefinition

Returns:

Expression corresponding to the given nullif expression

nullif

public Expression nullif(Calendar arg1,
                         Calendar arg2)

Description copied from interface: QueryDefinition

nullif This is equivalent to a case expression that tests whether its arguments are equal, returning null if they are and the value of the first expression if they are not.

Specified by:

nullif in interface QueryDefinition

Returns:

Expression corresponding to the given nullif expression

nullif

public Expression nullif(Class arg1,
                         Class arg2)

Description copied from interface: QueryDefinition

nullif This is equivalent to a case expression that tests whether its arguments are equal, returning null if they are and the value of the first expression if they are not.

Specified by:

nullif in interface QueryDefinition

Returns:

Expression corresponding to the given nullif expression

nullif

public Expression nullif(Enum<?> arg1,
                         Enum<?> arg2)

Description copied from interface: QueryDefinition

nullif This is equivalent to a case expression that tests whether its arguments are equal, returning null if they are and the value of the first expression if they are not.

Specified by:

nullif in interface QueryDefinition

Returns:

Expression corresponding to the given nullif expression

orderBy

public QueryDefinition orderBy(OrderByItem... orderByItems)

Description copied from interface: QueryDefinition

Specify the items of the select list that are used in ordering the query results. Replaces the previous order-by list, if any.

Specified by:

orderBy in interface QueryDefinition

Parameters:

orderByItems - - one or more OrderByItem instances

Returns:

the modified QueryDefinition instance

orderBy

public QueryDefinition orderBy(List<OrderByItem> orderByItemList)

Description copied from interface: QueryDefinition

Specify the items of the select list that are used in ordering the query results. Replaces the previous order-by list, if any.

Specified by:

orderBy in interface QueryDefinition

Parameters:

orderByItemList - - a list containing one or more OrderByItem instances

Returns:

the modified QueryDefinition instance

param

public Expression param(String name)

Description copied from interface: QueryDefinition

Specify use of a parameter of the given name.

Specified by:

param in interface QueryDefinition

Returns:

an Expression corresponding to a named parameter

predicate

public Predicate predicate(boolean b)

Description copied from interface: QueryDefinition

Create a predicate value from the given boolean.

Specified by:

predicate in interface QueryDefinition

Parameters:

b - boolean value

Returns:

a true or false predicate

select

public QueryDefinition select(SelectItem... items)

Description copied from interface: QueryDefinition

Specify the objects / values to be returned. Replaces the previous select list, if any. If no select items are specified and there is only one query root, the root entity is assumed to be the result.

Specified by:

select in interface QueryDefinition

Parameters:

items - - one or more SelectItem instances

Returns:

the modified query definition instance

select

public QueryDefinition select(List<SelectItem> items)

Description copied from interface: QueryDefinition

Specify the objects / values to be returned. Replaces the previous select list, if any. If no select items are specified and there is only one query root, the root entity is assumed to be the result.

Specified by:

select in interface QueryDefinition

Parameters:

items - - a list containing one or more SelectItem instances

Returns:

the modified query definition instance

selectDistinct

public QueryDefinition selectDistinct(SelectItem... items)

Description copied from interface: QueryDefinition

Specify the objects / values to be returned. Duplicate results will be eliminated. Replaces the previous select list, if any. If no select items are specified and there is only one query root, the root entity is assumed to be the result.

Specified by:

selectDistinct in interface QueryDefinition

Parameters:

items - - one or more SelectItem instances

Returns:

the modified query definition instance

selectDistinct

public QueryDefinition selectDistinct(List<SelectItem> items)

Description copied from interface: QueryDefinition

Specify the objects / values to be returned. Duplicate results will be eliminated. Replaces the previous select list, if any. If no select items are specified, and there is only one query root, the root entity is assumed to be the result. is assumed to be the result.

Specified by:

selectDistinct in interface QueryDefinition

Parameters:

items - - a list containing one or more SelectItem instances

Returns:

the modified query definition instance

simpleCase

public CaseExpression simpleCase(Expression caseOperand)

Description copied from interface: QueryDefinition

Create a simple case expression with the given case operand. A simple case expression is of the form:

simpleCase(case-operand) .when(scalar-expression).then(scalar-expression) .when(scalar-expression).then(scalar-expression) ... .elseCase(scalar-expression)

Specified by:

simpleCase in interface QueryDefinition

Parameters:

caseOperand - - expression used for testing against the when scalar expressions

Returns:

case expression with the given case operand

simpleCase

public CaseExpression simpleCase(Number caseOperand)

Description copied from interface: QueryDefinition

Create a simple case expression with the given case operand. A simple case expression is of the form:

simpleCase(case-operand) .when(scalar-expression).then(scalar-expression) .when(scalar-expression).then(scalar-expression) ... .elseCase(scalar-expression)

Specified by:

simpleCase in interface QueryDefinition

Parameters:

caseOperand - - numeric value used for testing against the when scalar expressions

Returns:

case expression with the given case operand

simpleCase

public CaseExpression simpleCase(String caseOperand)

Description copied from interface: QueryDefinition

Create a simple case expression with the given case operand. A simple case expression is of the form:

simpleCase(case-operand) .when(scalar-expression).then(scalar-expression) .when(scalar-expression).then(scalar-expression) ... .elseCase(scalar-expression)

Specified by:

simpleCase in interface QueryDefinition

Parameters:

caseOperand - - value used for testing against the when scalar expressions

Returns:

case expression with the given case operand

simpleCase

public CaseExpression simpleCase(Date caseOperand)

Description copied from interface: QueryDefinition

Create a simple case expression with the given case operand. A simple case expression is of the form:

simpleCase(case-operand) .when(scalar-expression).then(scalar-expression) .when(scalar-expression).then(scalar-expression) ... .elseCase(scalar-expression)

Specified by:

simpleCase in interface QueryDefinition

Parameters:

caseOperand - - value used for testing against the when scalar expressions

Returns:

case expression with the given case operand

simpleCase

public CaseExpression simpleCase(Calendar caseOperand)

Description copied from interface: QueryDefinition

Create a simple case expression with the given case operand. A simple case expression is of the form:

simpleCase(case-operand) .when(scalar-expression).then(scalar-expression) .when(scalar-expression).then(scalar-expression) ... .elseCase(scalar-expression)

Specified by:

simpleCase in interface QueryDefinition

Parameters:

caseOperand - - value used for testing against the when scalar expressions

Returns:

case expression with the given case operand

simpleCase

public CaseExpression simpleCase(Class caseOperand)

Description copied from interface: QueryDefinition

Create a simple case expression with the given case operand. A simple case expression is of the form:

simpleCase(case-operand) .when(scalar-expression).then(scalar-expression) .when(scalar-expression).then(scalar-expression) ... .elseCase(scalar-expression)

Specified by:

simpleCase in interface QueryDefinition

Parameters:

caseOperand - - value used for testing against the when scalar expressions

Returns:

case expression with the given case operand

simpleCase

public CaseExpression simpleCase(Enum<?> caseOperand)

Description copied from interface: QueryDefinition

Create a simple case expression with the given case operand. A simple case expression is of the form:

simpleCase(case-operand) .when(scalar-expression).then(scalar-expression) .when(scalar-expression).then(scalar-expression) ... .elseCase(scalar-expression)

Specified by:

simpleCase in interface QueryDefinition

Parameters:

caseOperand - - value used for testing against the when scalar expressions

Returns:

case expression with the given case operand

some

public Subquery some()

Description copied from interface: QueryDefinition

Use the query definition object in a subquery in a some expression.

Specified by:

some in interface QueryDefinition

Returns:

the resulting Subquery

where

public QueryDefinition where(Predicate predicate)

Description copied from interface: QueryDefinition

Modifies the query definition to restrict the result of the query according to the specified predicate. Replaces the previously added restriction(s), if any.

Specified by:

where in interface QueryDefinition

Parameters:

predicate - - a simple or compound conditional predicate

Returns:

the modified QueryDefinition instance

asExpression

public String asExpression(AliasContext ctx)

Description copied from interface: Visitable

Get a JPQL fragment as used in WHERE clause.

Specified by:

asExpression in interface Visitable

Overrides:

asExpression in class AbstractVisitable

asProjection

public String asProjection(AliasContext ctx)

Description copied from interface: Visitable

Gets the string representation in SELECT projection.

Specified by:

asProjection in interface Visitable

Overrides:

asProjection in class AbstractVisitable

fillBuffer

public void fillBuffer(String header,
                       StringBuilder buffer,
                       AliasContext ctx,
                       List list,
                       org.apache.openjpa.persistence.query.QueryDefinitionImpl.Visit visit)

fillBuffer

public void fillBuffer(String header,
                       StringBuilder buffer,
                       AliasContext ctx,
                       Predicate p)