svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.file / org.gvsig.fmap.dal.file.dbf / src / main / java / org / gvsig / fmap / dal / store / dbf / MyTransform.java @ 40596
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/**
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* gvSIG. Desktop Geographic Information System.
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*
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* Copyright (C) 2007-2013 gvSIG Association.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 3
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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* For any additional information, do not hesitate to contact us
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* at info AT gvsig.com, or visit our website www.gvsig.com.
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*/
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package org.gvsig.fmap.dal.store.dbf; |
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import java.util.ArrayList; |
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import java.util.List; |
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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.exception.ReadException; |
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import org.gvsig.fmap.dal.feature.AbstractFeatureStoreTransform; |
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import org.gvsig.fmap.dal.feature.EditableFeature; |
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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.GeometryLocator; |
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import org.gvsig.fmap.geom.GeometryManager; |
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import org.gvsig.fmap.geom.exception.CreateGeometryException; |
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import org.gvsig.tools.persistence.PersistentState; |
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import org.gvsig.tools.persistence.exception.PersistenceException; |
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public class MyTransform extends AbstractFeatureStoreTransform { |
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private String geomName; |
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private String xname; |
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private String yname; |
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private GeometryManager geomManager;
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/**
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* A default constructor with out parameters
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*/
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public MyTransform() {
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this.geomManager = GeometryLocator.getGeometryManager();
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} |
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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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*
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* @param geomName
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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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*
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* @param yname
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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 MyTransform initialize(FeatureStore store, String geomName, |
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String xname, String yname) throws DataException { |
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// Initialize some data
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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
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// and keep a reference to the
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// resulting feature type
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EditableFeatureType type = getFeatureStore().getDefaultFeatureType() |
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.getEditable(); |
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type.add(geomName, DataTypes.GEOMETRY); |
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List list = new ArrayList(1); |
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list.add(type.getNotEditableCopy()); |
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setFeatureTypes(list, (FeatureType) list.get(0));
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return this; |
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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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* 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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Geometry geom; |
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try {
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geom = geomManager.createPoint(source.getDouble(xname), source |
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.getDouble(yname), Geometry.SUBTYPES.GEOM2D); |
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} catch (CreateGeometryException e) {
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throw new ReadException("XYTranform", e); |
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} |
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target.setGeometry(this.geomName, geom);
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} |
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public void saveToState(PersistentState state) throws PersistenceException { |
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state.set("xname", xname);
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state.set("yname", yname);
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state.set("geomName", geomName);
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} |
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public void loadFromState(PersistentState state) |
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throws PersistenceException {
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this.xname = state.getString("xname"); |
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this.yname = state.getString("yname"); |
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this.geomName = state.getString("geomName"); |
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} |
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/**
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* Returns the FeatureType to use to get data from original store
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*/
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public FeatureType getSourceFeatureTypeFrom(FeatureType targetFeatureType) {
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EditableFeatureType ed = targetFeatureType.getEditable(); |
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ed.remove(this.geomName);
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return ed.getNotEditableCopy();
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} |
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/**
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* Informs that original values of store don't will be modified
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*/
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public boolean isTransformsOriginalValues() { |
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return false; |
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} |
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} |