org.opengis.feature.type
Interface OperationType

All Superinterfaces:
PropertyType

public interface OperationType
extends PropertyType

Operation information, immutable.

This represents a type of operation that can be used to update the state of an AttributeType, this gets more exciting with ComplexAttribtueType (or Feature)

If you come to this from a pure java background this is where we capture the methods in our dynamic model. Since we do not carry implementations here you would do best to think of this as an interface definition.

To implement a method you will need to examine the OperationDescriptor that can put you in touch with actual functionality, often implemented directly in java, or using a scripting language.

The implementation of the operations is against the bound AttributeType "B":

Notes:


Method Summary
 List<AttributeType> getParameters()
          We need the following AttributeTypes as parameters.
 Set<Filter> getRestrictions()
          List of restrictions used to limit the allowable returned value.
 AttributeType getResult()
          Indicates the expected result type, may be null.
 OperationType getSuper()
          Access to super type information.
 AttributeType getTarget()
          AttributeType this operation type can function against.
 boolean isAbstract()
          Indicate that this OperationType may not be used directly.
 
Methods inherited from interface PropertyType
equals, getDescription, getName, getUserData, hashCode, putUserData
 

Method Detail

getSuper

OperationType getSuper()
Access to super type information.

The super type may contain an implementation based on the additional restrictions to be considered, or a definition of isNilable.

Specified by:
getSuper in interface PropertyType
Returns:
AttributeType of supertype

isAbstract

boolean isAbstract()
Indicate that this OperationType may not be used directly.

This indicates that a sub type will need to actually define the operation meaning here. As an example a graph system could have an Edge that would have "related" operation returning that was abstract, and a sub type road would define "related" based on touches, or "contains" or "common vertex".

Specified by:
isAbstract in interface PropertyType

getTarget

AttributeType getTarget()
AttributeType this operation type can function against.


getResult

AttributeType getResult()
Indicates the expected result type, may be null.

Returns:
expected result type, may be null

getParameters

List<AttributeType> getParameters()
We need the following AttributeTypes as parameters.

Note we do not need AttributeDescriptors here as parameters are ordered, so name is not needed.

Returns:
indicates paramters required for operation

getRestrictions

Set<Filter> getRestrictions()
List of restrictions used to limit the allowable returned value.

Specified by:
getRestrictions in interface PropertyType
Returns:
Set used to validate allowable values.


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