Application: gvSIG desktop

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2007-2013 gvSIG Association.

 *

 * This program is free software; you can redistribute it and/or modify it under

 * the terms of the GNU General Public License as published by the Free Software

 * Foundation; either version 3 of the License, or (at your option) any later

 * version.

 *

 * This program is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS

 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more

 * details.

 *

 * You should have received a copy of the GNU General Public License along with

 * this program; if not, write to the Free Software Foundation, Inc., 51

 * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

 *

 * For any additional information, do not hesitate to contact us at info AT

 * gvsig.com, or visit our website www.gvsig.com.

 */

package org.gvsig.symbology.fmap.mapcontext.rendering.legend.styling;

import java.awt.Color;

import java.awt.Font;

import java.awt.Graphics2D;

import java.awt.geom.NoninvertibleTransformException;

import java.awt.geom.Point2D;

import java.awt.image.BufferedImage;

import java.util.ArrayList;

import java.util.List;

import java.util.logging.Level;

import org.apache.batik.ext.awt.geom.PathLength;

import org.cresques.cts.ICoordTrans;

import org.cresques.cts.IProjection;

import org.slf4j.LoggerFactory;

import org.gvsig.compat.print.PrintAttributes;

import org.gvsig.fmap.dal.exception.DataException;

import org.gvsig.fmap.dal.exception.ReadException;

import org.gvsig.fmap.dal.feature.Feature;

import org.gvsig.fmap.dal.feature.FeatureQuery;

import org.gvsig.fmap.dal.feature.FeatureSet;

import org.gvsig.fmap.dal.feature.FeatureStore;

import org.gvsig.fmap.dal.feature.FeatureType;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.exception.CreateGeometryException;

import org.gvsig.fmap.geom.operation.GeometryOperationException;

import org.gvsig.fmap.geom.operation.GeometryOperationNotSupportedException;

import org.gvsig.fmap.geom.primitive.Envelope;

import org.gvsig.fmap.geom.primitive.Point;

import org.gvsig.fmap.geom.type.GeometryType;

import org.gvsig.fmap.mapcontext.MapContext;

import org.gvsig.fmap.mapcontext.ViewPort;

import org.gvsig.fmap.mapcontext.layers.FLayer;

import org.gvsig.fmap.mapcontext.layers.vectorial.FLyrVect;

import org.gvsig.fmap.mapcontext.layers.vectorial.IntersectsEnvelopeEvaluator;

import org.gvsig.fmap.mapcontext.rendering.legend.styling.ILabelingMethod;

import org.gvsig.fmap.mapcontext.rendering.legend.styling.IPlacementConstraints;

import org.gvsig.fmap.mapcontext.rendering.legend.styling.IZoomConstraints;

import org.gvsig.symbology.fmap.mapcontext.rendering.symbol.impl.CartographicSupportToolkit;

import org.gvsig.symbology.fmap.mapcontext.rendering.symbol.text.impl.SimpleTextSymbol;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.dispose.DisposableIterator;

import org.gvsig.tools.dynobject.DynStruct;

import org.gvsig.tools.exception.BaseException;

import org.gvsig.tools.persistence.PersistenceManager;

import org.gvsig.tools.persistence.PersistentState;

import org.gvsig.tools.persistence.exception.PersistenceException;

import org.gvsig.tools.task.Cancellable;

import org.gvsig.tools.util.Callable;

import org.slf4j.Logger;

/**

 * LabelingStrategy used when the user wants to use label sizes, rotations, etc.

 * from the values included in fields of the datasource's table

 *

 * @author jaume dominguez faus - jaume.dominguez@iver.es

 *

 */

public class AttrInTableLabelingStrategy implements IAttrInTableLabelingStrategy {

    private static final String FIELD_LABELING_METHOD = "labelingMethod";

    private static final String FIELD_ZOOM_CONSTRAINTS = "zoomConstraints";

    private static final String FIELD_COLOR_FONT = "colorFont";

    private static final String FIELD_REFERENCE_SYSTEM = "referenceSystem";

    private static final String FIELD_FIXED_COLOR = "fixedColor";

    private static final String FIELD_USE_FIXED_COLOR = "useFixedColor";

    private static final String FIELD_FIXED_SIZE = "fixedSize";

    private static final String FIELD_USE_FIXED_SIZE = "useFixedSize";

    private static final String FIELD_FONT = "font";

    private static final String FIELD_UNIT = "Unit";

    private static final String FIELD_ROTATION = "RotationField";

    private static final String FIELD_COLOR = "ColorField";

    private static final String FIELD_HEIGHT = "HeightField";

    private static final String FIELD_TEXT = "TextField";

    private static final Logger logger = LoggerFactory.getLogger(AttrInTableLabelingStrategy.class);

    public static final double MIN_TEXT_SIZE = 3;

    private static final String ATTR_IN_TABLE_LABELING_STRATEGY_PERSISTENCE_DEFINITION_NAME

            = "AttrInTableLabelingStrategy";

    private ILabelingMethod method = new DefaultLabelingMethod();

    private IZoomConstraints zoom;

    private FLyrVect layer;

//        private double unitFactor = 1D;

    private double fixedSize = 10;

    private Color fixedColor;

    private int unit = -1; //(pixel)

    private boolean useFixedSize;

    private boolean useFixedColor;

    private int referenceSystem;

//        private boolean isPrinting;

    private String[] usedFields = null;

    private Font font;

    private Color colorFont;

    private String textFieldName;

    private String rotationFieldName;

    private String heightFieldName;

    private String colorFieldName;

    public ILabelingMethod getLabelingMethod() {

        return this.method;

    }

    public void setLabelingMethod(ILabelingMethod method) {

        this.method = method;

    }

    public IPlacementConstraints getPlacementConstraints() {

        return null; // (automatically handled by the driver)

    }

    public void setPlacementConstraints(IPlacementConstraints constraints) {

        // nothing

    }

    public IZoomConstraints getZoomConstraints() {

        return zoom;

    }

    public void setZoomConstraints(IZoomConstraints constraints) {

        this.zoom = constraints;

    }

//    private double getScale(ViewPort vp, PrintAttributes patts)

//            throws ReadException {

//

//        double dpi = 0;

//        if (patts != null) {

//            int len = PrintAttributes.PRINT_QUALITY_DPI.length;

//            int priq = patts.getPrintQuality();

//            if (priq < 0 || priq >= len) {

//                dpi = vp.getDPI();

//            } else {

//                dpi = PrintAttributes.PRINT_QUALITY_DPI[priq];

//            }

//        } else {

//            dpi = vp.getDPI();

//        }

//

//        // ============== We have dpi now ====================

//        IProjection proj = vp.getProjection();

//

//        if (vp.getImageSize() == null || vp.getAdjustedEnvelope() == null) {

//            throw new ReadException("",

//                    new Exception("Viewport does not have image size or envelope"));

//        }

//

//        double[] trans2Meter = MapContext.getDistanceTrans2Meter();

//        if (proj == null) {

//            double wmeters = ((vp.getImageSize().width / dpi) * 0.0254);

//            return (long) ((trans2Meter[vp.getMapUnits()] * vp.getAdjustedEnvelope().getLength(0))

//                    / wmeters);

//        } else {

//            return Math.round(proj.getScale(

//                    vp.getAdjustedEnvelope().getMinimum(0)

//                    * trans2Meter[vp.getMapUnits()],

//                    vp.getAdjustedEnvelope().getMaximum(0)

//                    * trans2Meter[vp.getMapUnits()],

//                    vp.getImageSize().width,

//                    dpi));

//        }

//

//    }

    private void draw(BufferedImage image, Graphics2D g, double scale, ViewPort viewPort,

            Cancellable cancel, PrintAttributes props) throws ReadException {

//        double scale = getScale(viewPort, props);

        SimpleTextSymbol sym = new SimpleTextSymbol();

        sym.setFont(getFont());

        sym.setUnit(unit);

        sym.setReferenceSystem(referenceSystem);

        if (zoom == null

                || (zoom.isUserDefined() && (scale >= zoom.getMaxScale())

                && (scale <= zoom.getMinScale()))) {

            FeatureSet set = null;

            DisposableIterator iterator = null;

            try {

                FilteredLogger logger = new FilteredLogger(AttrInTableLabelingStrategy.logger, 10);

                // limit the labeling to the visible extent

                List<String> fields = new ArrayList<String>();

                int heightPos = -1;

                int rotationPos = -1;

                int textPos = -1;

                int colorPos = -1;

                if (!this.usesFixedSize()) {

                    if (getHeightField() != null) {

                        heightPos = fields.size();

                        fields.add(getHeightField());

                    }

                }

                if (getRotationField() != null) {

                    rotationPos = fields.size();

                    fields.add(getRotationField());

                }

                if (getTextField() != null) {

                    textPos = fields.size();

                    fields.add(getTextField());

                }

                if (!this.usesFixedColor() && getColorField() != null) {

                    colorPos = fields.size();

                    fields.add(getColorField());

                }

                FeatureStore featureStore = layer.getFeatureStore();

                ICoordTrans ct = layer.getCoordTrans();

                String geomName = featureStore.getDefaultFeatureType().getDefaultGeometryAttributeName();

                fields.add(geomName);

                FeatureQuery featureQuery = layer.createFeatureQuery();

                if (viewPort.getAdjustedEnvelope().contains(

                        layer.getFullEnvelope())) {

                    /*

                     * viewport contains layer completely

                     */

                    set = featureStore.getFeatureSet(featureQuery);

                } else {

                    /*

                     * view port does not contain layer completely

                     */

                    IntersectsEnvelopeEvaluator iee = null;

                    IProjection data_proj = null;

                    Envelope env_in_store_crs = null;

                    if (ct == null) {

                        env_in_store_crs = viewPort.getAdjustedEnvelope();

                        data_proj = viewPort.getProjection();

                    } else {

                        env_in_store_crs = viewPort.getAdjustedEnvelope().convert(

                                ct.getInverted());

                        data_proj = ct.getPOrig();

                    }

                    iee = new IntersectsEnvelopeEvaluator(

                            env_in_store_crs,

                            data_proj,

                            featureStore.getDefaultFeatureType(),

                            geomName);

                    featureQuery.setAttributeNames((String[]) fields.toArray(new String[fields.size()]));

                    featureQuery.setFilter(iee);

                    set = featureStore.getFeatureSet(featureQuery);

                }

                /*

                 * 'set' now has the features that have to be labeled

                 */

                iterator = set.fastIterator();

                while (iterator.hasNext()) {

                    if (cancel.isCanceled()) {

                        return;

                    }

                    try {

                        Feature feature = (Feature) iterator.next();

                        Geometry geom = feature.getDefaultGeometry();

                        if( geom == null ) {

                            continue;

                        }

                        double size = 0;

                        Color color = null;

                        if (useFixedSize) {

                            // uses fixed size

                            size = fixedSize;// * fontScaleFactor;

                        } else if (heightFieldName != null) {

                            // text size is defined in the table

                            try {

                                size = feature.getDouble(fields.get(heightPos));

                            } catch (Exception e) {

                                logger.warn("Null text height value for text '"+ feature.getString(fields.get(textPos))+"'.");

                                continue;

                            }

                        } else {

                            // otherwise will use the size in the symbol

                            size = sym.getFont().getSize();

                        }

                        double the_dpi = viewPort.getDPI();

                        if (props != null) {

                            int len = PrintAttributes.PRINT_QUALITY_DPI.length;

                            int priq = props.getPrintQuality();

                            if (priq < 0 || priq >= len) {

                                throw new ReadException(featureStore.getName(),

                                        new Exception("Bad print quality value: "+ priq));

                            } else {

                                the_dpi = PrintAttributes.PRINT_QUALITY_DPI[priq];

                            }

                        }

                        size = CartographicSupportToolkit.getCartographicLength(this,

                                        size,

                                        viewPort,

                                        the_dpi);

                        if (size <= MIN_TEXT_SIZE) {

                                                // label is too small to be readable, will be skipped

                            // this speeds up the rendering in wider zooms

                            continue;

                        }

                        /*

                         * ym.setFontSize(int) assumes dpi = 72

                         */

                        double font_size = size * 72 / the_dpi;

                        sym.setFontSize(font_size);

                        if (useFixedColor) {

                            color = fixedColor;

                        } else if (colorFieldName != null) {

                            // text size is defined in the table

                            try {

                                color = new Color(feature.getInt(fields.get(colorPos)));

                            } catch (ClassCastException ccEx) {

                                if (feature.get(fields.get(colorPos)) != null) {

                                    throw new ReadException("Unknown", ccEx);

                                }

                                logger.warn("Null color value for text '"+feature.getString(textFieldName)+"'.");

                                continue;

                            }

                        } else {

                            color = sym.getTextColor();

                        }

                        sym.setTextColor(color);

                        if (ct != null) {

                            /*

                             * Reproject from store CRS to view CRS

                             */

                            geom = geom.cloneGeometry();

                            geom.reProject(ct);

                        }

                        double rotation = 0D;

                        Point p = null;

                        if (rotationFieldName != null) {

                            // text rotation is defined in the table

                            rotation = -Math.toRadians(((Number) feature.get(fields.get(rotationPos))).doubleValue());

                            p = createLabelPoint(geom);

                        } else {

                            GeometryType gty = geom.getGeometryType();

                            if (gty.isTypeOf(Geometry.TYPES.CURVE)

                                    || gty.isTypeOf(Geometry.TYPES.MULTICURVE)) {

                                Geometry aux_geom = geom.cloneGeometry();

                                aux_geom.transform(viewPort.getAffineTransform());

                                PathLength pathLen = new PathLength(aux_geom);

                                float length = pathLen.lengthOfPath();

                                float distance = (float) (length * 0.4);

                                rotation = pathLen.angleAtLength(distance);

                                if (rotation < (-Math.PI / 2)) {

                                    rotation = rotation + Math.PI;

                                } else {

                                    if (rotation > (Math.PI / 2)) {

                                        rotation = rotation - Math.PI;

                                    }

                                }

                                double norm = -rotation + Math.PI / 2;

                                Point2D p2 = pathLen.pointAtLength(distance);

                                Point2D p2_anchor = new Point2D.Double();

                                try {

                                    viewPort.getAffineTransform().inverseTransform(

                                            p2, p2_anchor);

                                } catch (NoninvertibleTransformException e) {

                                    logger.warn("While computing anchor point", e);

                                }

                                double font_offset = 0.8 * font_size

                                        / viewPort.getAffineTransform().getScaleX();

                                p2_anchor.setLocation(

                                        /*

                                         * Move away from line

                                         */

                                        p2_anchor.getX() + font_offset * Math.cos(norm),

                                        p2_anchor.getY() + font_offset * Math.sin(norm));

                                p = GeometryLocator.getGeometryManager().createPoint(

                                        p2_anchor.getX(),

                                        p2_anchor.getY(), Geometry.SUBTYPES.GEOM2D);

                            } else {

                                p = createLabelPoint(geom);

                            }

                        }

                        sym.setText(feature.getString(fields.get(textPos)));

                        sym.setRotation(rotation);

                        if (p != null) {

                            if (props == null) {

                                sym.draw(g, viewPort.getAffineTransform(), p, feature, cancel);

                            } else {

                                sym.print(g, viewPort.getAffineTransform(), p, props);

                            }

                        }

                    } catch(Exception ex) {

                        logger.warn("",ex);

                    }

                }

            } catch (BaseException e) {

                throw new ReadException(

                        "Could not draw annotation in the layer.", e);

            } finally {

                if (iterator != null) {

                    iterator.dispose();

                }

                if (set != null) {

                    set.dispose();

                }

            }

        }

    }

    static class FilteredLogger {

        private int count = 0;

        private final Logger logger;

        private final int max;

        public FilteredLogger(Logger logger, int max) {

            this.max = max;

            this.logger = logger;

        }

        public void warn(String msg, Throwable th) {

            if( ++this.count < this.max ) {

                this.logger.warn(msg,th);

            } else if( this.count == this.max ) {

                this.logger.warn(msg,th);

                this.logger.warn("Too many errors, don't dump more in this process.");

            }

        }

        public void warn(String msg) {

            if( ++this.count < this.max ) {

                this.logger.warn(msg);

            } else if( this.count == this.max ) {

                this.logger.warn(msg);

                this.logger.warn("Too many errors, don't dump more in this process.");

            }

        }

        public void info(String msg) {

            if( ++this.count < this.max ) {

                this.logger.info(msg);

            } else if( this.count == this.max ) {

                this.logger.info(msg);

                this.logger.info("Too many errors, don't dump more in this process.");

            }

        }

    }

    public void draw(BufferedImage image, Graphics2D g, double scale, ViewPort viewPort,

            Cancellable cancel, double dpi) throws ReadException {

        draw(image, g, scale, viewPort, cancel, null);

    }

    private org.gvsig.fmap.geom.primitive.Point createLabelPoint(org.gvsig.fmap.geom.Geometry geom)

            throws CreateGeometryException {

        try {

            return geom.centroid();

        } catch (GeometryOperationNotSupportedException e) {

            return null;

        } catch (GeometryOperationException e) {

            return null;

        }

    }

//        public String getClassName() {

//                return getClass().getName();

//        }

    public String getRotationField() {

        return this.rotationFieldName;

    }

    public String getTextField() {

        return this.textFieldName;

    }

    public String getHeightField() {

        return this.heightFieldName;

    }

    public String getColorField() {

        return this.colorFieldName;

    }

    public void setTextField(String textFieldName) {

        this.textFieldName = textFieldName;

        this.usedFields = null;

    }

    public void setRotationField(String rotationFieldName) {

        this.rotationFieldName = rotationFieldName;

        this.usedFields = null;

    }

    /**

     * Sets the field that contains the size of the text. The size is computed

     * in meters. To use any other unit, call setUnit(int) with the scale factor

     * from meters (for centimeters, call <b>setUnitFactor(0.01))</b>.

     *

     * @param heightFieldName

     */

    public void setHeightField(String heightFieldName) {

        this.heightFieldName = heightFieldName;

        this.usedFields = null;

    }

    public void setColorField(String colorFieldName) {

        this.colorFieldName = colorFieldName;

    }

    public void print(Graphics2D g, double scale, ViewPort viewPort, Cancellable cancel,

            PrintAttributes props) throws ReadException {

        draw(null, g, scale, viewPort, cancel, props);

    }

    public void setUsesFixedSize(boolean b) {

        useFixedSize = b;

        this.usedFields = null;

    }

    public boolean usesFixedSize() {

        return useFixedSize;

    }

    public double getFixedSize() {

        return fixedSize;

    }

    public void setFixedSize(double fixedSize) {

        this.fixedSize = fixedSize;

        this.usedFields = null;

    }

    public void setUsesFixedColor(boolean b) {

        useFixedColor = b;

        this.usedFields = null;

    }

    public boolean usesFixedColor() {

        return useFixedColor;

    }

    public Color getFixedColor() {

        return fixedColor;

    }

    public void setFixedColor(Color fixedColor) {

        this.fixedColor = fixedColor;

    }

    public void setUnit(int unitIndex) {

        unit = unitIndex;

    }

    public int getUnit() {

        return unit;

    }

    public String[] getUsedFields() {

        if (this.usedFields == null) {

            List<String> v = new ArrayList<String>(4);

            if (!this.usesFixedSize()) {

                if (getHeightField() != null) {

                    v.add(getHeightField());

                }

            }

            if (getRotationField() != null) {

                v.add(getRotationField());

            }

            if (getTextField() != null) {

                v.add(getTextField());

            }

            if (!this.usesFixedColor() && getColorField() != null) {

                v.add(getColorField());

            }

            this.usedFields = (String[]) v.toArray(new String[v.size()]);

        }

        return this.usedFields;

    }

    public int getReferenceSystem() {

        return referenceSystem;

    }

    public void setReferenceSystem(int referenceSystem) {

        this.referenceSystem = referenceSystem;

    }

    public double toCartographicSize(ViewPort viewPort, double dpi, Geometry geom) {

        // not required here

        throw new Error("Undefined in this context");

    }

    public void setCartographicSize(double cartographicSize, Geometry geom) {

        // not required here

        throw new Error("Undefined in this context");

    }

    public double getCartographicSize(ViewPort viewPort, double dpi, Geometry geom) {

        // not required here

        throw new Error("Undefined in this context");

    }

    public void setLayer(FLayer layer) {

        this.layer = (FLyrVect) layer;

        if (layer == null) {

            return;

        }

        FeatureType type;

        try {

            type = this.layer.getFeatureStore().getDefaultFeatureType();

        } catch (DataException e) {

            throw new RuntimeException(this.getClass().getName(), e);

        }

        if (textFieldName != null) {

            if (type.getIndex(textFieldName) < 0) {

                // FIXME exception ??

            }

        }

        if (rotationFieldName != null) {

            if (type.getIndex(rotationFieldName) < 0) {

                // FIXME exception ??

            }

        }

        if (heightFieldName != null) {

            if (type.getIndex(heightFieldName) < 0) {

                // FIXME exception ??

            }

        }

        if (colorFieldName != null) {

            if (type.getIndex(colorFieldName) < 0) {

                // FIXME exception ??

            }

        }

    }

    public boolean shouldDrawLabels(double scale) {

        return layer.isWithinScale(scale);

    }

    public Color getColorFont() {

        return colorFont;

    }

    public void setColorFont(Color colorFont) {

        this.colorFont = colorFont;

    }

    public Font getFont() {

        return font;

    }

    public void setFont(Font selFont) {

        this.font = selFont;

    }

    /* (non-Javadoc)

     * @see org.gvsig.tools.persistence.Persistent#loadFromState(org.gvsig.tools.persistence.PersistentState)

     */

    public void loadFromState(PersistentState state)

            throws PersistenceException {

        setTextField(state.getString(FIELD_TEXT));

        setHeightField(state.getString(FIELD_HEIGHT));

        setColorField(state.getString(FIELD_COLOR));

        setRotationField(state.getString(FIELD_ROTATION));

        setUnit(state.getInt(FIELD_UNIT));

        setFont((Font) state.get(FIELD_FONT));

        useFixedSize = state.getBoolean(FIELD_USE_FIXED_SIZE);

        setFixedSize(state.getDouble(FIELD_FIXED_SIZE));

        useFixedColor = state.getBoolean(FIELD_USE_FIXED_COLOR);

        setFixedColor((Color) state.get(FIELD_FIXED_COLOR));

        setReferenceSystem(state.getInt(FIELD_REFERENCE_SYSTEM));

        setColorFont((Color) state.get(FIELD_COLOR_FONT));

        setZoomConstraints((IZoomConstraints) state.get(FIELD_ZOOM_CONSTRAINTS));

        setLabelingMethod((ILabelingMethod) state.get(FIELD_LABELING_METHOD));

    }

    /* (non-Javadoc)

     * @see org.gvsig.tools.persistence.Persistent#saveToState(org.gvsig.tools.persistence.PersistentState)

     */

    public void saveToState(final PersistentState state) throws PersistenceException {

        state.set(FIELD_TEXT, getTextField());

        state.set(FIELD_HEIGHT, getHeightField());

        state.set(FIELD_COLOR, getColorField());

        state.set(FIELD_ROTATION, getRotationField());

        state.set(FIELD_UNIT, getUnit());

        state.set(FIELD_FONT, getFont());

        state.set(FIELD_USE_FIXED_SIZE, useFixedSize);

        state.set(FIELD_FIXED_SIZE, getFixedSize());

        state.set(FIELD_USE_FIXED_COLOR, useFixedColor);

        state.set(FIELD_FIXED_COLOR, getFixedColor());

        state.set(FIELD_REFERENCE_SYSTEM, getReferenceSystem());

        state.set(FIELD_COLOR_FONT, getColorFont());

        state.set(FIELD_ZOOM_CONSTRAINTS, getZoomConstraints());

        state.set(FIELD_LABELING_METHOD, getLabelingMethod());

    }

    public static class RegisterPersistence implements Callable {

        public Object call() throws Exception {

            PersistenceManager manager = ToolsLocator.getPersistenceManager();

            if (manager.getDefinition(ATTR_IN_TABLE_LABELING_STRATEGY_PERSISTENCE_DEFINITION_NAME) == null) {

                DynStruct definition = manager.addDefinition(

                        AttrInTableLabelingStrategy.class,

                        ATTR_IN_TABLE_LABELING_STRATEGY_PERSISTENCE_DEFINITION_NAME,

                        ATTR_IN_TABLE_LABELING_STRATEGY_PERSISTENCE_DEFINITION_NAME + " Persistence definition",

                        null,

                        null

                );

                definition.addDynFieldString(FIELD_TEXT).setMandatory(true);

                definition.addDynFieldString(FIELD_HEIGHT).setMandatory(false);

                definition.addDynFieldString(FIELD_COLOR).setMandatory(false);

                definition.addDynFieldString(FIELD_ROTATION).setMandatory(false);

                definition.addDynFieldInt(FIELD_UNIT).setMandatory(true);

                definition.addDynFieldObject(FIELD_FONT).setMandatory(false).setClassOfValue(Font.class);

                definition.addDynFieldBoolean(FIELD_USE_FIXED_SIZE).setMandatory(true);

                definition.addDynFieldDouble(FIELD_FIXED_SIZE).setMandatory(false);

                definition.addDynFieldBoolean(FIELD_USE_FIXED_COLOR).setMandatory(true);

                definition.addDynFieldObject(FIELD_FIXED_COLOR).setMandatory(false).setClassOfValue(Color.class);

                definition.addDynFieldInt(FIELD_REFERENCE_SYSTEM).setMandatory(true);

                definition.addDynFieldObject(FIELD_COLOR_FONT).setMandatory(false).setClassOfValue(Color.class);

                definition.addDynFieldObject(FIELD_ZOOM_CONSTRAINTS).setMandatory(false).setClassOfValue(IZoomConstraints.class);

                definition.addDynFieldObject(FIELD_LABELING_METHOD).setMandatory(true).setClassOfValue(ILabelingMethod.class);

            }

            return Boolean.TRUE;

        }

    }

}