org.jbpm.query.jpa.data

Class QueryCriteria

java.lang.Object

org.jbpm.query.jpa.data.QueryCriteria

public class QueryCriteria
extends Object

This object contains the following information:

1. The listId, which refers to the field that this criteria applies to
   • See QueryParameterIdentifiers
2. The values of the criteria, which will be applied to the listId field
   • For example, it could be a list of numbers "1, 22, 3"
3. Whether this is a union ("OR") or intersection ("AND") critieria
4. The type of criteria: normal, like (JPQL regex) or range
5. The grouping information of the phrase (see below)

With regard to the grouping information in this class, we treat JPQL/SQL as a "prefix" language here, which means that this class represents the following regular expression/BNF string:

   [)]{0,} [OR|AND] [(]{0,} <CRITERIA>
 

This structure is then represented by the following fields:

   [endGroups] [union] [startGroupos] [values]
 

The main reason to include the grouping status in this object is that other data structures (nested lists, etc) are much harder to de/serialize correctly.

Constructor Summary

Constructors

Constructor and Description
QueryCriteria()
QueryCriteria(boolean union) Used when creating a group criteria
QueryCriteria(QueryCriteria queryCriteria)
QueryCriteria(String listId, boolean union, QueryWhere.QueryCriteriaType type, int valueListSize) Used for all other criteria
QueryCriteria(String listId, QueryWhere.QueryCriteriaType type)

Method Summary

Modifier and Type	Method and Description
void	addCriteria(QueryCriteria criteria)
List<QueryCriteria>	getCriteria()
List<Date>	getDateValues()
String	getListId()
List<Object>	getParameters() This method returns a list that should only be read
QueryWhere.QueryCriteriaType	getType()
List<Object>	getValues()
boolean	hasCriteria()
boolean	hasDateValues()
boolean	hasValues()
boolean	isFirst()
boolean	isGroupCriteria()
boolean	isUnion()
void	setCriteria(List<QueryCriteria> criteria)
void	setDateValues(List<Date> dateValues)
void	setFirst(boolean first)
void	setListId(String listId)
void	setType(QueryWhere.QueryCriteriaType type)
void	setUnion(boolean union)
void	setValues(List<Object> values)
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

QueryCriteria

public QueryCriteria()

QueryCriteria

public QueryCriteria(boolean union)

Used when creating a group criteria

Parameters:

union - Whether or not the group is part of an intersection or disjunction

QueryCriteria

public QueryCriteria(String listId,
                     QueryWhere.QueryCriteriaType type)

QueryCriteria

public QueryCriteria(String listId,
                     boolean union,
                     QueryWhere.QueryCriteriaType type,
                     int valueListSize)

Used for all other criteria

Parameters:

listId - The QueryParameterIdentifiers list id

union - Whether or not the criteria is part of an intersection or disjunction

type - The type: QueryWhere.QueryCriteriaType.NORMAL, QueryWhere.QueryCriteriaType.REGEXP, or QueryWhere.QueryCriteriaType.RANGE,

valueListSize - The size of the value list

QueryCriteria

public QueryCriteria(QueryCriteria queryCriteria)

Method Detail

getListId

public String getListId()

setListId

public void setListId(String listId)

isUnion

public boolean isUnion()

setUnion

public void setUnion(boolean union)

isFirst

public boolean isFirst()

setFirst

public void setFirst(boolean first)

getType

public QueryWhere.QueryCriteriaType getType()

setType

public void setType(QueryWhere.QueryCriteriaType type)

getValues

public List<Object> getValues()

setValues

public void setValues(List<Object> values)

getDateValues

public List<Date> getDateValues()

setDateValues

public void setDateValues(List<Date> dateValues)

isGroupCriteria

public boolean isGroupCriteria()

hasValues

public boolean hasValues()

hasDateValues

public boolean hasDateValues()

hasCriteria

public boolean hasCriteria()

getCriteria

public List<QueryCriteria> getCriteria()

setCriteria

public void setCriteria(List<QueryCriteria> criteria)

getParameters

public List<Object> getParameters()

This method returns a list that should only be read

Returns:

addCriteria

public void addCriteria(QueryCriteria criteria)

toString

public String toString()

Overrides:

toString in class Object