Package overit.geocall.sql.code.fragment

Class Fragment

java.lang.Object

overit.geocall.sql.code.fragment.Fragment

Direct Known Subclasses:

ClauseFragment, ClausesFragment, EnclosedDoubleFragment, EnclosedFragment, FragmentSequence, StillFragment

public abstract class Fragment
extends Object

The class represent a piece that will compose a SQL string.

Field Summary

Fields

Modifier and Type	Field	Description
protected Criterion	_criterion

Constructor Summary

Constructors

Constructor	Description
Fragment()

Method Summary

Modifier and Type	Method	Description
abstract boolean	appendTo(StringBuilder sb, String header, Criterion defaultCriterion, Map<String,Object> context)	This method is used to create the Fragment's SQL string.
Criterion	getCriterion(Criterion def)	Gets the current set Criterion.
void	overlapCriterion(Criterion criterion)	Adds an overlapping criterion.
void	replaceCriterion(Criterion criterion)	Replace the oldest Criterion with a new one.
String	toString(Criterion defaultCriterion, Map<String,Object> context)	Gets the translation, in sql string, of the fragment

Methods inherited from class java.lang.Object

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

Field Details

_criterion

protected Criterion _criterion

Constructor Details

Fragment

public Fragment()

Method Details

overlapCriterion

public void overlapCriterion(Criterion criterion)

Adds an overlapping criterion.

Parameters:

criterion - The priority criterion to be addes to the current criterion.

replaceCriterion

public void replaceCriterion(Criterion criterion)

Replace the oldest Criterion with a new one.

Parameters:

criterion - The new Criterion to set.

getCriterion

public Criterion getCriterion(Criterion def)

Gets the current set Criterion.

Parameters:

def - The default object to return if there's no Criterion set.

Returns:

The current Criterion if it's set, def otherwise.

appendTo

public abstract boolean appendTo(StringBuilder sb,
 String header,
 Criterion defaultCriterion,
 Map<String,Object> context)

This method is used to create the Fragment's SQL string.

Parameters:

sb - The StringBuilder used to add the current piece (Fragment) of SQL cod, to create the complete SQL string.

header - The string previus the Fragment's code.

defaultCriterion - The Criterion, set by default, to apply.

context - The input values to define the clauses of the sql string.

Returns:

true if there's a Fragment to add, false otherwise.

toString

public String toString(Criterion defaultCriterion,
 Map<String,Object> context)

Gets the translation, in sql string, of the fragment

Parameters:

defaultCriterion - The defautl criterion used as decision criterion.

context - The input values to define the clauses of the sql string.

Returns:

The translation, in sql string, of the fragment