org.acmsl.queryj
Class ConditionFactory

java.lang.Object
  |
  +--org.acmsl.queryj.ConditionFactory

public class ConditionFactory

extends java.lang.Object

Has the responsiblity of knowing how to create conditions.

Version:

$Revision: 1.1 $

Author:

Jose San Leandro

Nested Class Summary

protected static class	ConditionFactory._AtomicConditionWrapper Envelopes a condition surrounding it with appropiate prefix and suffix.
protected static class	ConditionFactory._ConditionWrapper Envelopes a condition surrounding it with appropiate prefix and suffix.
protected static class	ConditionFactory._VariableConditionWrapper Envelopes a variable condition surrounding it with appropiate prefix and suffix.

Constructor Summary

protected

ConditionFactory() Protected constructor to avoid accidental instantiation.

Method Summary

Condition	createCondition(Field leftSideField, ConditionOperator operator, Field rightSideField) Creates a condition
Condition	createCondition(Field leftSideField, ConditionOperator operator, int value) Creates a condition
VariableCondition	createVariableCondition(Field field, ConditionOperator operator) Creates a variable condition.
static ConditionFactory	getInstance() Retrieves a ConditionFactory instance.
protected static java.lang.ref.WeakReference	getReference() Retrieves the weak reference.
protected static void	setReference(ConditionFactory factory) Specifies a new weak reference.
Condition	wrap(AtomicCondition condition, java.lang.String prefix, java.lang.String suffix) Creates a wrapper condition.
Condition	wrap(Condition condition, java.lang.String prefix, java.lang.String suffix) Creates a wrapper condition.
VariableCondition	wrap(VariableCondition condition, java.lang.String prefix, java.lang.String suffix) Creates a wrapper condition.

Methods inherited from class java.lang.Object

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

Constructor Detail

ConditionFactory

protected ConditionFactory()

Protected constructor to avoid accidental instantiation.

Method Detail

setReference

protected static void setReference(ConditionFactory factory)

Specifies a new weak reference.

Parameters:

factory - the factory instance to use.

getReference

protected static java.lang.ref.WeakReference getReference()

Retrieves the weak reference.

Returns:

such reference.

getInstance

public static ConditionFactory getInstance()

Retrieves a ConditionFactory instance.

Returns:

such instance.

createCondition

public Condition createCondition(Field leftSideField,
                                 ConditionOperator operator,
                                 Field rightSideField)

Creates a condition

Parameters:

leftSideField - the left-side field.

operator - the operator.

rightSideField - the right-side field.

Returns:

such type of instance.

createCondition

public Condition createCondition(Field leftSideField,
                                 ConditionOperator operator,
                                 int value)

Creates a condition

Parameters:

leftSideField - the left-side field.

operator - the operator.

value - the fixed value.

Returns:

such type of instance.

createVariableCondition

public VariableCondition createVariableCondition(Field field,
                                                 ConditionOperator operator)

Creates a variable condition.

Parameters:

field - the field.

operator - the operator.

Returns:

such type of instance.

wrap

public Condition wrap(Condition condition,
                      java.lang.String prefix,
                      java.lang.String suffix)

Creates a wrapper condition.

Parameters:

condition - the condition to wrap.

prefix - the prefix.

suffix - the suffix.

Returns:

the wrapped condition.

wrap

public Condition wrap(AtomicCondition condition,
                      java.lang.String prefix,
                      java.lang.String suffix)

Creates a wrapper condition.

Parameters:

condition - the condition to wrap.

prefix - the prefix.

suffix - the suffix.

Returns:

the wrapped condition.

wrap

public VariableCondition wrap(VariableCondition condition,
                              java.lang.String prefix,
                              java.lang.String suffix)

Creates a wrapper condition.

Parameters:

condition - the condition to wrap.

prefix - the prefix.

suffix - the suffix.

Returns:

the wrapped condition.