org.geotools.feature
Interface FeatureAttributeType

All Superinterfaces:

AttributeType, PrimativeAttributeType

public interface FeatureAttributeType

extends AttributeType, PrimativeAttributeType

A FeatureType aware Feature AttributeType.

While we could use a plain AttributeType to capture a Feature instance we would miss out one one important aspect: the schema.

By definition the schema of a Feature is not defined by java interface alone, this interface allows access the the assocaited FeatureType.

Suggestion: we can look at having this class extend ListFeatureType and exactly specifying how delegation to the getSchema() should occur. (the alternative is to make FeatureType extend ListAttributeType). Something should be done as they have 90% the same API.

Since:

2.1.M5

Author:

Jody Garnett, Refractions Research, Inc.

Field Summary

Fields inherited from interface org.geotools.feature.AttributeType

UNBOUNDED

Method Summary

java.lang.Object	createDefaultValue() Method should delegate responsibility to a FeatureFactory.
java.lang.Object	duplicate(java.lang.Object src) Method should return getSchema().duplicate( feature ) Exampe implementation: return getSchema().duplicate( (Feature) getValue() ); It is understood that FeatureType.duplicate
Filter	getRestriction() Filter must indicate value is required to be a member of getSchema().
FeatureType	getSchema() Retrieve the schema for this FeatureType
java.lang.Class	getType() Method must return type Feature.class.
boolean	isGeometry() Deprecated. repalce with: type instanceof GeometryAttributeType

Methods inherited from interface org.geotools.feature.AttributeType

getMaxOccurs, getMinOccurs, getName, isNillable, parse, validate

Method Detail

createDefaultValue

public java.lang.Object createDefaultValue()

Method should delegate responsibility to a FeatureFactory.

Specified by:

createDefaultValue in interface AttributeType

Returns:

Default value, note may be null if isNillable is true

See Also:

AttributeType.createDefaultValue()

duplicate

public java.lang.Object duplicate(java.lang.Object src)
                           throws IllegalAttributeException

Method should return getSchema().duplicate( feature )

Exampe implementation:

  return getSchema().duplicate( (Feature) getValue() );
 

It is understood that FeatureType.duplicate

Specified by:

duplicate in interface AttributeType

Parameters:

src - The Object to duplicate.

Returns:

Duplicate of provided object

Throws:

IllegalAttributeException - If the src Object is not the correct type.

See Also:

AttributeType.duplicate(java.lang.Object)

getType

public java.lang.Class getType()

Method must return type Feature.class.

Exampe implementation:

  return Feature.class;
 

Specified by:

getType in interface AttributeType

Returns:

Type.

See Also:

AttributeType.getType()

getSchema

public FeatureType getSchema()

Retrieve the schema for this FeatureType

Returns:

CS_CoordinateSystem for this GeometryAttributeType

isGeometry

public boolean isGeometry()

Deprecated. repalce with: type instanceof GeometryAttributeType

Must return false.

Returns:

DOCUMENT ME!

See Also:

org.geotools.feature.AttributeType#isGeometry()

getRestriction

public Filter getRestriction()

Filter must indicate value is required to be a member of getSchema().

TODO: We need a Filter code snipit describing how to enforce the indicated relationship.

Specified by:

getRestriction in interface AttributeType

Returns:

Filter, or Filter.NONE if no restriction is needed.

See Also:

AttributeType.getRestriction()