org.gvsig.fmap.dal

Interface DataQuery

All Superinterfaces:

Persistent

All Known Subinterfaces:

FeatureQuery, RasterQuery, SpiRasterQuery

All Known Implementing Classes:

DefaultFeatureQuery, DefaultRasterQuery

public interface DataQuery
extends Persistent

Defines the properties of a collection of data, as a result of a query through a DataStore.

The scale parameter can be used by the DataStore as a hint about the quality or resolution of the data needed to view or operate with the data returned. As an example, it may use the scale to return only a representative subset of the data, or maybe to return Data with less detail, like a point or a line instead of a polygon.

Method Summary

Modifier and Type	Method and Description
Object	getQueryParameter(String name) Returns the value of an query parameter.
double	getScale() Returns the scale of the data to load.
void	setQueryParameter(String name, Object value) Sets the value of an query parameter.
void	setScale(double scale) Sets the scale.

Methods inherited from interface org.gvsig.tools.persistence.Persistent

loadFromState, saveToState

Method Detail

setScale

void setScale(double scale)

Sets the scale.

Parameters:

scale - the scale to set

getScale

double getScale()

Returns the scale of the data to load.

Returns:

the scale of the data to load

getQueryParameter

Object getQueryParameter(String name)

Returns the value of an query parameter.

Parameters:

name - of the parameter

Returns:

the parameter value

setQueryParameter

void setQueryParameter(String name,
                       Object value)

Sets the value of an query parameter.

Parameters:

name - of the query parameter

value - for the query parameter