ch.elca.el4j.services.persistence.jpa.criteria
Class QueryBuilder.ConditionList<T extends Expression>

java.lang.Object
  ch.elca.el4j.services.persistence.jpa.criteria.QueryBuilder.ConditionList<T>

Type Parameters:

T -

All Implemented Interfaces:

Expression

Enclosing class:

QueryBuilder

public class QueryBuilder.ConditionList<T extends Expression>
extends Object
implements Expression

Condition of QueryBuilder.

Author:

LLT

Field Summary

protected T

parent the QueryBuilder or ConditionList which started this condition list.

Constructor Summary

QueryBuilder.ConditionList(T parent, String operation)
Sole constructor.

Method Summary

void	append(String query) Appends sub query into the builder.
T	end() marks the end of an ANDed or ORed list of predicates.
QueryBuilder.ConditionList<T>	exist(QueryBuilder subQueryBuilder) adds an EXISTS ( subquery ) to this condition.
QueryBuilder.ConditionList<T>	existIf(QueryBuilder subQueryBuilder, boolean cond) same as exist(QueryBuilder) iff cond evaluates to true.
QueryBuilder.ConditionList<T>	existIfNotNull(QueryBuilder subQueryBuilder, Object obj)
QueryBuilder.ConditionList<T>	ifCond(String predicate) adds condition to this condition list.
QueryBuilder.ConditionList<T>	ifCond(String queryPredicate, boolean cond) adds queryPredicate iff cond evaluates to true.
QueryBuilder.ConditionList<T>	ifNotNull(String condition, Object parameter)
QueryBuilder.ConditionList<T>	ifNotNull(String queryPredicate, Object parameter, boolean cond) same as ifNotNull(String, Object) iff cond evaluates to true.
QueryBuilder.ConditionList<QueryBuilder.ConditionList<T>>	startAnd() Marks the beginning of a new ANDed ConditionList.
QueryBuilder.ConditionList<QueryBuilder.ConditionList<T>>	startOr() Marks the beginning of a new ORed ConditionList.

Methods inherited from class java.lang.Object

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

Field Detail

parent

protected T extends Expression parent

the QueryBuilder or ConditionList which started this condition list. is returned when .end() is called.

Constructor Detail

QueryBuilder.ConditionList

public QueryBuilder.ConditionList(T parent,
                                  String operation)

Sole constructor.

Parameters:

parent - is returned when .end() is called.

operation - AND or OR

Method Detail

ifCond

public QueryBuilder.ConditionList<T> ifCond(String predicate)

adds condition to this condition list.

Parameters:

predicate - condition

Returns:

this

ifCond

public QueryBuilder.ConditionList<T> ifCond(String queryPredicate,
                                            boolean cond)

adds queryPredicate iff cond evaluates to true.

Parameters:

queryPredicate - the query predicate

cond - condition

Returns:

this

ifNotNull

public QueryBuilder.ConditionList<T> ifNotNull(String condition,
                                               Object parameter)

ifNotNull

public QueryBuilder.ConditionList<T> ifNotNull(String queryPredicate,
                                               Object parameter,
                                               boolean cond)

same as ifNotNull(String, Object) iff cond evaluates to true.

Parameters:

queryPredicate - query's predicate

parameter - parameter

cond - cond

Returns:

this

existIf

public QueryBuilder.ConditionList<T> existIf(QueryBuilder subQueryBuilder,
                                             boolean cond)

same as exist(QueryBuilder) iff cond evaluates to true.

Parameters:

subQueryBuilder - subquery

cond - cond

Returns:

this

existIfNotNull

public QueryBuilder.ConditionList<T> existIfNotNull(QueryBuilder subQueryBuilder,
                                                    Object obj)

Parameters:

subQueryBuilder - subquery

obj - obj which is tested for nullness.

Returns:

existIf(subQueryBuilder, obj != null)

exist

public QueryBuilder.ConditionList<T> exist(QueryBuilder subQueryBuilder)

adds an EXISTS ( subquery ) to this condition.

Parameters:

subQueryBuilder - subquery

Returns:

this

end

public T end()

marks the end of an ANDed or ORed list of predicates.

Returns:

the QueryBuilder which started this condition

startAnd

public QueryBuilder.ConditionList<QueryBuilder.ConditionList<T>> startAnd()

Marks the beginning of a new ANDed ConditionList.

Returns:

the nested ConditionList

startOr

public QueryBuilder.ConditionList<QueryBuilder.ConditionList<T>> startOr()

Marks the beginning of a new ORed ConditionList.

Returns:

the nested ConditionList

append

public void append(String query)

Appends sub query into the builder.

Specified by:

append in interface Expression

Parameters:

query - the query to append