Application: gvSIG desktop

import java.awt.*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.util.ArrayList;

import java.util.Comparator;

import java.util.Date;

/**

 * This panel lets the user choose a vector layer from a view and a field and a value

 * and then it zooms to the extent of the features which match the value.

 * @author jldominguez

 */

public class DataSelectionPanel extends JPanel

implements IWindow, ActionListener {

	private static final long serialVersionUID = 1L;

	private static final Logger logger =

        LoggerFactory.getLogger(DataSelectionPanel.class);

    private JComboBox layerComboBox = null;

	private JComboBox fieldValueComboBox = null;

	private JComboBox fieldNameComboBox = null;

    private WindowInfo viewInfo = null;

	private JButton goButton = null;

		this.mapCtxt = mapContext;

        initialize();

	}

	private void initialize() {

        jLabel2 = new JLabel();

        jLabel1 = new JLabel();

        jLabel = new JLabel();

        this.setLayout(new BorderLayout());

        this.setBorder(new EmptyBorder(new Insets(0,5,5,5)));

        jLabel.setText(PluginServices.getText(this,"Capa") + ":");

        jLabel1.setText(PluginServices.getText(this,"Campo") + ":");

        jLabel2.setText(PluginServices.getText(this,"Valor") + ":");

        c.gridx = 0;

        c.gridy = 0;

        centerPanelGrid.add(jLabel, c);

        c.gridx = 0;

        c.gridy = 1;

        centerPanelGrid.add(jLabel1, c);

        c.gridx = 0;

        c.gridy = 2;

        centerPanelGrid.add(jLabel2, c);

        c.anchor = GridBagConstraints.CENTER;

        c.weightx = 1;

        c.gridx = 1;

        c.gridy = 0;

        centerPanelGrid.add(getLayersComboBox(), c);

        c.gridx = 1;

        c.gridy = 2;

        centerPanelGrid.add(getValuesComboBox(), c);

        this.add(centerPanelGrid, BorderLayout.CENTER);

        // Panel Sur

        jPanelButtons = new JPanel();

        FlowLayout flowLayor = new FlowLayout(FlowLayout.RIGHT);

        jPanelButtons.add(getCloseButton(), null);

        this.add(jPanelButtons, BorderLayout.SOUTH);

	}

	private FeatureAttributeDescriptor[] getFields(FLyrVect vect) {

		FeatureStore featureStore;

		try {

            featureStore = vect.getFeatureStore();

            logger.error("While getting field names.", e);

            return new FeatureAttributeDescriptor[0];

		}

	}

	private Object[] getNewValues(FLyrVect vlayer, String fname) {

		FeatureStore featureStore;

		if (vlayer == null || fname == null) {

		    return new Object[0];

		}

		FeatureSet set = null;

		try {

									return 1;

							} else if (o1 instanceof String

									&& o2 instanceof String) {

							} else if (o1 instanceof Date && o2 instanceof Date) {

								return ((Date) o1).compareTo((Date) o2);

							}

			while (diter.hasNext()) {

			    feat = (Feature) diter.next();

			    treeSet.add(feat.get(fname));

			}

			diter.dispose();

			return treeSet.toArray();

	private JComboBox getLayersComboBox() {

		if (layerComboBox == null) {

			layerComboBox = new JComboBox();

			List<FLyrVect> vs = DataLocatorExtension.getVectorLayers(mapCtxt.getLayers());

			LayersComboItem[] items = new LayersComboItem[vs.size()];

			for (int i=0; i<vs.size(); i++) {

		}

		return layerComboBox;

	}

	/**

	 * This method initializes jComboBox1

	 *

		}

		return fieldValueComboBox;

	}

	/**

	 * This method initializes jButton

	 *

	public Object getWindowProfile() {

		return WindowInfo.DIALOG_PROFILE;

	}

	class ValueEvaluator implements Evaluator {

		private String fieldName = null;

		private Object value = null;

		private EvaluatorFieldsInfo info = null;

	    /**

	     * Non null

	     * @param name

	     */

		public ValueEvaluator(String name) {

		 * @param val

		 */

		public ValueEvaluator(String name, Object val, DataType dtype) {

		    fieldName = name;

			info = new EvaluatorFieldsInfo();

			info.addFieldValue(name);

		public Object evaluate(EvaluatorData data)

				throws EvaluatorException {

			Object obj = data.getDataValue(fieldName);

			if (nonnull) {

			    /*

		        if (value == null) {

		            resp = fieldName + " is null";

		        } else {

		            resp = fieldName + " = "  + quote + value.toString() + quote;

		        }

		    }

    }

    public void actionPerformed(ActionEvent e) {

        Object src = e.getSource();

        if (src == this.getLayersComboBox()) {

            LayersComboItem litem =

                (LayersComboItem) getLayersComboBox().getSelectedItem();

            if (litem != null) {

                if (atts.length > 0) {

                    getFieldsComboBox().setEnabled(true);

                    getFieldsComboBox().removeAllItems();

                    for (int i=0; i<atts.length; i++) {

                        if (atts[i].getType() != DataTypes.GEOMETRY) {

                            getFieldsComboBox().addItem(new FieldsComboItem(atts[i]));

            getValuesComboBox().setEnabled(false);

            return;

        }

        // ==========================================================

        // ==========================================================

        if (src == this.getFieldsComboBox()) {

            LayersComboItem litem =

                (LayersComboItem) getLayersComboBox().getSelectedItem();

            FieldsComboItem fatt =

                (FieldsComboItem) getFieldsComboBox().getSelectedItem();

            if (litem != null && fatt != null) {

                Object[] vals = this.getNewValues(litem.getLayer(), fatt.toString());

                if (vals.length > 0) {

                    this.getValuesComboBox().setEnabled(true);

                    this.getValuesComboBox().removeAllItems();

                    DefaultComboBoxModel model = new DefaultComboBoxModel(vals);

        // ==========================================================

        if (src == this.getValuesComboBox()) {

            return;

        }

                SelectedZoomVisitor visitor = new SelectedZoomVisitor();

                featureSet.accept(visitor);

                Envelope env_data = visitor.getSelectBound();

                if (env_data != null) {

                    if (lyr.getCoordTrans() != null) {

                        env_data = env_data.convert(lyr.getCoordTrans());

                    }

                }

            // =======================================

            }

            return;

        }

    }