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Geomajas GWT2 client: Main - Server Extension
/*
* This is part of Geomajas, a GIS framework, http://www.geomajas.org/.
*
* Copyright 2008-2014 Geosparc nv, http://www.geosparc.com/, Belgium.
*
* The program is available in open source according to the GNU Affero
* General Public License. All contributions in this program are covered
* by the Geomajas Contributors License Agreement. For full licensing
* details, see LICENSE.txt in the project root.
*/
package org.geomajas.gwt2.client.map.feature;
import org.geomajas.geometry.Geometry;
import org.geomajas.gwt2.client.map.MapPresenter;
import org.geomajas.gwt2.client.map.layer.FeaturesSupported;
import org.geomajas.gwt2.client.map.layer.VectorServerLayer;
import org.geomajas.layer.feature.SearchCriterion;
/**
* Service for feature retrieval and manipulation. This service is map specific, and so the methods may assume the
* features come from layers within the map's {@link org.geomajas.gwt2.client.map.layer.LayersModel}.
*
* @author Pieter De Graef
*/
public interface ServerFeatureService {
/**
* Logical operator used when searching for features through multiple attribute criteria.
*
* @author Pieter De Graef
*/
public enum LogicalOperator {
/**
* Only retrieve features for which ALL criteria apply.
*/
AND("AND"),
/**
* Retrieve features for which at least ONE criterion applies.
*/
OR("OR");
private String value;
private LogicalOperator(String value) {
this.value = value;
}
public String getValue() {
return value;
}
}
/**
* Definition of geometric query types.
*
* @author Pieter De Graef
*/
public enum QueryType {
/**
* Apply the intersects calculation when searching features.
*/
INTERSECTS(1),
/**
* Apply the touches calculation when searching features.
*/
TOUCHES(2),
/**
* Apply the within calculation when searching features.
*/
WITHIN(3),
/**
* Apply the contains calculation when searching features.
*/
CONTAINS(4);
private int value;
private QueryType(int value) {
this.value = value;
}
public int getValue() {
return value;
}
}
/**
* Search types that determines which layers to search.
*
* @author Pieter De Graef
*/
public enum SearchLayerType {
/**
* Go over all layers in the given order, but stop searching the moment a layer returns a result. If 4 layers
* are passed to the search, and the second layer produces a result, then the third and fourth layer will not be
* searched anymore. This option will therefore return results for maximum 1 layer.
*/
TOP_LAYER_ONLY(1),
/**
* Always search in all given layers. Some layers may produce results while others will not. This option does
* not care, it will always loop over all layers.
*/
SEARCH_ALL_LAYERS(2),
/**
* Searches only the selected layer in the {@link org.geomajas.gwt2.client.map.layer.LayersModel}, and only if
* this layer is of the type {@link VectorServerLayer}.
*/
SEARCH_SELECTED_LAYER(3);
private int value;
private SearchLayerType(int value) {
this.value = value;
}
public int getValue() {
return value;
}
}
/**
* Transform a server-side feature object into a client-side feature object.
*
* @param feature The server-side feature.
* @param layer The layer it belongs to.
* @return The client-side feature.
*/
Feature create(org.geomajas.layer.feature.Feature feature, FeaturesSupported layer);
// ------------------------------------------------------------------------
// Searching features by attributes:
// ------------------------------------------------------------------------
/**
* Search for features within a certain layer through a list of attribute criteria.
*
* @param crs The map coordinate reference system.
* @param layer The layer to search in.
* @param criteria The list of attribute criteria.
* @param operator The logical operator to use between the criteria (AND/OR).
* @param maxResultSize The maximum number of features to return. Use -1 if there should be no maximum.
* @param callback Callback function to apply on the result.
*/
void search(String crs, VectorServerLayer layer, SearchCriterion[] criteria, LogicalOperator operator,
int maxResultSize, FeatureMapFunction callback);
// ------------------------------------------------------------------------
// Searching features by location:
// ------------------------------------------------------------------------
/**
* Search for features within a certain layer by a given location.
*
* @param crs The map coordinate reference system.
* @param layer The layer to search in.
* @param location The location to search at. Should be expressed in the map CRS.
* @param buffer A buffer that can be applied to extend the location. Keep this at 0 if no buffer is necessary.
* @param callback Callback function to apply on the result.
*/
void search(String crs, VectorServerLayer layer, Geometry location, double buffer, FeatureMapFunction callback);
/**
* Search for features within the {@link org.geomajas.gwt2.client.map.layer.LayersModel} at the given location.
*
* @param mapPresenter The map to search for.
* @param location The location to search at. Should be expressed in the map CRS.
* @param buffer A buffer that can be applied to extend the location. Keep this at 0 if no buffer is
* necessary.
* @param queryType The type of geometric calculation that should determine whether or not to include a certain
* feature.
* @param searchType Determines which layers to search. Unless this type is "SELECTED_LAYER", all layers will be
* included in the search request.
* @param ratio Used only in case the queryType equals INTERSECTS. This value (between 0 and 1) determines
* the ratio of intersection whereby to include features in the search. If for example a ratio
* of 0.5 is used, all features that intersect for at least 50% with the given location will be
* included.
* @param callback Callback function to apply on the result.
*/
void search(MapPresenter mapPresenter, Geometry location, double buffer, QueryType queryType,
SearchLayerType searchType, float ratio, FeatureMapFunction callback);
}