com.whitestein.lsps.engine.state.xml

Class NullValue

java.lang.Object

com.whitestein.lsps.engine.state.xml.NullValue

All Implemented Interfaces:

SimpleValue, Value

public class NullValue
extends Object
implements SimpleValue

Persistent value representing null.

Author:

rba

Field Summary

Fields

Modifier and Type	Field and Description
static NullValue	NULL Null value.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	NullValue() Creates empty instance.

Method Summary

Modifier and Type	Method and Description
<T,E extends Throwable> T	accept(ValueVisitor<T,E> visitor) Accepts visitor.
NullValue	createCopy(ModelInstance targetModelInstance) Creates a copy without references to other objects.
Type	getCompiledType(ModelProvider modelProvider) Returns the compiled type.
String	getType() Returns the type.
Object	getValue() Returns the contained value.
boolean	isRemoved() Returns true if value is removed
SSimpleValue	toSerializable(SModelInstance smi, MarshallerConfig config) Creates a serializable object.
SimpleValue	toSimpleValue() If this is SimpleValue this method returns this, otherwise it returns a ValueRef to this.
String	toString()
Value	toValue() If this is a ValueRef this method returns the referenced value, otherwise it returns this.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.whitestein.lsps.engine.state.xml.SimpleValue

finishCopy

Field Detail

NULL

public static final NullValue NULL

Null value.

Constructor Detail

NullValue

protected NullValue()

Creates empty instance.

Method Detail

accept

public <T,E extends Throwable> T accept(ValueVisitor<T,E> visitor)
                                 throws E extends Throwable

Description copied from interface: Value

Accepts visitor.

Specified by:

accept in interface Value

Returns:

the result

Throws:

E

E extends Throwable

getValue

public Object getValue()

Description copied from interface: SimpleValue

Returns the contained value.

Specified by:

getValue in interface SimpleValue

Returns:

the contained value

toSerializable

public SSimpleValue toSerializable(SModelInstance smi,
                                   MarshallerConfig config)

Description copied from interface: SimpleValue

Creates a serializable object.

Specified by:

toSerializable in interface SimpleValue

Specified by:

toSerializable in interface Value

Returns:

a serializable object

toSimpleValue

public SimpleValue toSimpleValue()

Description copied from interface: Value

If this is SimpleValue this method returns this, otherwise it returns a ValueRef to this.

Specified by:

toSimpleValue in interface Value

Returns:

a SimpleValue

toValue

public Value toValue()

Description copied from interface: Value

If this is a ValueRef this method returns the referenced value, otherwise it returns this.

Specified by:

toValue in interface Value

Returns:

a Value

toString

public String toString()

Overrides:

toString in class Object

getType

public String getType()

Description copied from interface: Value

Returns the type.

Specified by:

getType in interface Value

Returns:

the type

getCompiledType

public Type getCompiledType(ModelProvider modelProvider)

Description copied from interface: Value

Returns the compiled type.

Specified by:

getCompiledType in interface Value

Returns:

the compiled type

createCopy

public NullValue createCopy(ModelInstance targetModelInstance)

Creates a copy without references to other objects.

Returns:

creates a copy

isRemoved

public boolean isRemoved()

Description copied from interface: Value

Returns true if value is removed

Specified by:

isRemoved in interface Value

Returns:

true if value is removed