Module io.github.mmm.property

Package io.github.mmm.property.criteria

Class CriteriaParametersNamed

java.lang.Object

io.github.mmm.property.criteria.CriteriaParametersNamed

All Implemented Interfaces:

CriteriaParameters

public class CriteriaParametersNamed
extends Object
implements CriteriaParameters

CriteriaParameters using named parameters. It puts ":«name»" into the output and collects the parameters in a Map that can get accessed via getParameters() after the database statement has been formatted and can be bound as parameters to the statement.

Since:

1.0.0

Constructor Summary

Constructors

Constructor	Description
CriteriaParametersNamed(boolean merge)	The constructor.

Method Summary

Modifier and Type	Method	Description
Map<String,Object>	getParameters()
boolean	isMerge()
void	onLiteral(Literal<?> literal, io.github.mmm.base.io.AppendableWriter out, CriteriaExpression<?> parent)

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.github.mmm.property.criteria.CriteriaParameters

cast

Constructor Details

CriteriaParametersNamed

public CriteriaParametersNamed(boolean merge)

The constructor.

Parameters:

merge - the merge flag.

Method Details

isMerge

public boolean isMerge()

Returns:

true if two Literals with same parameter name should be joined if their values are equal to each other, false otherwise. So if your SQL has p.Property() = 42 AND q.Property() = 42 a merge would create just one parameter ":property" with the value "42" and without merge it would add two parameters ":property" and ":property2" both with the value "42".

onLiteral

public void onLiteral(Literal<?> literal,
 io.github.mmm.base.io.AppendableWriter out,
 CriteriaExpression<?> parent)

Specified by:

onLiteral in interface CriteriaParameters

Parameters:

literal - the Literal to write in database syntax (e.g. SQL) and to collect as parameter.

out - the AppendableWriter where to write the Literal in database syntax to.

parent - the parent CriteriaExpression containing the Literal.

getParameters

public Map<String,Object> getParameters()

Returns:

the Map of collected named parameter values to bind to the database statement.