org.fryske_akademy.ejb

Class JpqlBuilderImpl

java.lang.Object

org.fryske_akademy.ejb.JpqlBuilderImpl

All Implemented Interfaces:

JpqlBuilder

public class JpqlBuilderImpl
extends Object
implements JpqlBuilder

contains function for building dynamic jpql where and order by clause based on Param and functions for setting parameters in a TypedQuery, also based on Param. Supports all comparison expressions except between when building jpql.

Author:

eduard

Field Summary

Fields

Modifier and Type	Field and Description
static String	TABLE_ALIAS tabel alias used in building where and order by clause.

Constructor Summary

Constructors

Constructor and Description
JpqlBuilderImpl()

Method Summary

Modifier and Type	Method and Description
String	orderClause(Map<String,CrudReadService.SORTORDER> sort) builds an order by clause, uses TABLE_ALIAS as alias for the table
void	setParam(javax.persistence.Query q, Param param) Fills parameters prepared in setWhereParams(javax.persistence.Query, java.util.List), if the type of the field in the query is a Short or an Integer and the paramValue is a String, it is converted accordingly.
void	setWhereParams(javax.persistence.Query q, List<Param> params) Calls setParam(javax.persistence.Query, org.fryske_akademy.ejb.Param) for each filter.
String	whereClause(List<Param> params) builds a where clause, calls whereCondition(org.fryske_akademy.ejb.Param) for every entry, uses TABLE_ALIAS as alias for the table
String	whereCondition(Param param) builds a where condition, prepares ql parameters later filled in setWhereParams(javax.persistence.Query, java.util.List).

Methods inherited from class java.lang.Object

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

Field Detail

TABLE_ALIAS

public static final String TABLE_ALIAS

tabel alias used in building where and order by clause.

See Also:

Constant Field Values

Constructor Detail

JpqlBuilderImpl

public JpqlBuilderImpl()

Method Detail

orderClause

public String orderClause(Map<String,CrudReadService.SORTORDER> sort)

builds an order by clause, uses TABLE_ALIAS as alias for the table

Specified by:

orderClause in interface JpqlBuilder

Parameters:

sort -

Returns:

whereClause

public String whereClause(List<Param> params)

builds a where clause, calls whereCondition(org.fryske_akademy.ejb.Param) for every entry, uses TABLE_ALIAS as alias for the table

Specified by:

whereClause in interface JpqlBuilder

Parameters:

params -

Returns:

See Also:

JpqlBuilder.whereCondition(org.fryske_akademy.ejb.Param), JpqlBuilder.setWhereParams(javax.persistence.Query, java.util.List)

whereCondition

public String whereCondition(Param param)

builds a where condition, prepares ql parameters later filled in setWhereParams(javax.persistence.Query, java.util.List). Supports all comparison operators in Param.getOperator() except between, for null and empty comparison Param.getNot() and Param.getParamValue() are ignored.

Specified by:

whereCondition in interface JpqlBuilder

Parameters:

param -

Returns:

See Also:

JpqlBuilder.setWhereParams(javax.persistence.Query, java.util.List)

setWhereParams

public void setWhereParams(javax.persistence.Query q,
                           List<Param> params)

Calls setParam(javax.persistence.Query, org.fryske_akademy.ejb.Param) for each filter.

Specified by:

setWhereParams in interface JpqlBuilder

Parameters:

q -

params -

setParam

public void setParam(javax.persistence.Query q,
                     Param param)

Fills parameters prepared in setWhereParams(javax.persistence.Query, java.util.List), if the type of the field in the query is a Short or an Integer and the paramValue is a String, it is converted accordingly. Via Param you have full control over the Object that is used as paramValue.

Specified by:

setParam in interface JpqlBuilder

Parameters:

q -

param -