Revision 25785 branches/v2_0_0_prep/libraries/libFMap_dal/src-test/org/gvsig/fmap/dal/feature/impl/MyTransform.java
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package org.gvsig.fmap.dal.feature.impl; |
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import java.util.Arrays; |
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import org.gvsig.fmap.dal.DataTypes; |
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import org.gvsig.fmap.dal.exception.DataException; |
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import org.gvsig.fmap.dal.feature.AbstractFeatureStoreTransform; |
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import org.gvsig.fmap.dal.feature.EditableFeatureType; |
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import org.gvsig.fmap.dal.feature.Feature; |
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import org.gvsig.fmap.dal.feature.FeatureStore; |
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import org.gvsig.fmap.dal.feature.FeatureType; |
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import org.gvsig.fmap.geom.Geometry; |
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import org.gvsig.fmap.geom.GeometryFactory; |
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import org.gvsig.fmap.geom.GeometryManager; |
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/** |
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* |
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* This transform adds a new attribute of type Geometry to the |
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* original store's default FeatureType. When applying the transform |
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* to a single feature this new attribute is assigned the value of a |
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* point whose coordinates proceed from two numeric attributes from the |
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* store, called xname, yname. |
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* |
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* This transform adds a new attribute of type Geometry to the original store's |
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* default FeatureType. When applying the transform to a single feature this new |
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* attribute is assigned the value of a point whose coordinates proceed from two |
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* numeric attributes from the store, called xname, yname. |
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* |
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*/ |
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class MyTransform extends AbstractFeatureStoreTransform {
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private String geomName; |
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private String xname;
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private String xname; |
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private String yname; |
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/** |
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* Empty default constructor |
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*/ |
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public MyTransform() {
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} |
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/** |
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* Initializes the transform by assigning the source store and the names of the necessary attributes. |
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* |
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* Initializes the transform by assigning the source store and the names of |
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* the necessary attributes. |
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* |
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* @param store |
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* source store.
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* source store.
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* |
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* @param geomName |
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* name of the geometry attribute in the default feature type from the source store. |
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* name of the geometry attribute in the default feature type |
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* from the source store. |
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* |
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* @param xname |
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* name of the attribute containing the X coordinates
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* name of the attribute containing the X coordinates
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* |
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* @param yname |
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* name of the attribute containing the Y coordinates
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* name of the attribute containing the Y coordinates
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* |
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* @throws DataException |
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*/ |
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public void initialize(FeatureStore store, String geomName, String xname, String yname) throws DataException {
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// Initialize some data |
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this.setFeatureStore(store); |
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this.geomName = geomName; |
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this.xname = xname; |
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this.yname = yname; |
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// obtain the feature type, add the new attribute and keep a reference to the resulting feature type |
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EditableFeatureType type = store.getDefaultFeatureType().getEditable(); |
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type.add(geomName, DataTypes.GEOMETRY); |
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setDefaultFeatureType(type.getNotEditableCopy()); |
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FeatureType[] types = new FeatureType[] { type.getNotEditableCopy() };
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setFeatureTypes(Arrays.asList(types), types[0]); |
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} |
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/** |
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* Applies this transform to a target editable feature, using data from the
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* Applies this transform to a target editable feature, using data from the |
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* source feature. |
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*/ |
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public void applyTransform(Feature source, EditableFeature target) |
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throws DataException {
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// copy source feature data over target feature |
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target.copyFrom(source); |
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// calculate and assign new attribute's value |
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GeometryFactory geomFactory = GeometryManager.getInstance().getGeometryFactory(); |
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Geometry geom = geomFactory.createPoint2D( |
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source.getDouble(xname),
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source.getDouble(xname), |
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source.getDouble(yname) |
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); |
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target.setGeometry(this.geomName, geom); |
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public void setState(PersistentState state) throws PersistenceException {
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} |
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} |
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