org.sqlproc.engine.plugin

Interface IsEmptyPlugin

All Superinterfaces:

Modifiers

All Known Implementing Classes:

DefaultSqlPlugins

public interface IsEmptyPlugin
extends Modifiers

The SQL Processor plugin devoted to evaluate the emptiness of the input value.

The emptiness is the basic facility in the construction of the final SQL statements from the META SQL fragments.

The standard evaluation is the next one:

The non-emptiness of a dynamic input value depends on the Java type of the related attribute

• for a String it must be not null and the length must be >0
• for a Collection it must be not null and the size must be >0
• for the rest Java types it must be not null
• an enumeration based attribute is treated in a special way, please see the advanced tutorial

Author:

Vladimir Hudec

Field Summary

Fields inherited from interface org.sqlproc.engine.plugin.Modifiers

MODIFIER_ANY, MODIFIER_ANYSET, MODIFIER_CALL, MODIFIER_DISCRIMINATOR, MODIFIER_EMPTY, MODIFIER_GTYPE, MODIFIER_ID, MODIFIER_IDENTITY_GENERATOR, MODIFIER_IDENTITY_SELECT, MODIFIER_NOTEMPTY, MODIFIER_NOTNULL, MODIFIER_NULL, MODIFIER_SEQUENCE, MODIFIER_TYPE

Method Summary

Methods

Modifier and Type	Method and Description
boolean	isNotEmpty(String attributeName, Object obj, Object parentObj, SqlMetaType sqlMetaType, String inOutModifier, boolean inSqlSetOrInsert, Map<String,String> values, Map<String,Object> features) Used for the evaluation of the emptiness in the META SQL fragments.

Method Detail

isNotEmpty

boolean isNotEmpty(String attributeName,
                 Object obj,
                 Object parentObj,
                 SqlMetaType sqlMetaType,
                 String inOutModifier,
                 boolean inSqlSetOrInsert,
                 Map<String,String> values,
                 Map<String,Object> features)
                   throws IllegalArgumentException

Used for the evaluation of the emptiness in the META SQL fragments.

Parameters:

attributeName - the name of the input value

obj - the input value

parentObj - the parent of the input value

sqlMetaType - the internal type (= META type) devoted for the special processing of the input values

inOutModifier - the input/output value modifier devoted to extend the processing of the input/output values

inSqlSetOrInsert - an indicator the input value is evaluated in the CRUD statement (INSERT or SET)

values - values for a special identifier handling, for example a sequence for an identity

features - the optional features in the statement coontext

Returns:

the non-emptiness of the input value

Throws:

IllegalArgumentException