Application: gvSIG desktop

package org.gvsig.fmap.dal.swing.impl.featurequery;

import java.awt.BorderLayout;

import java.awt.Component;

import java.awt.Dimension;

import java.net.URL;

import javax.swing.DefaultComboBoxModel;

import javax.swing.DefaultListModel;

import javax.swing.ImageIcon;

import javax.swing.JComponent;

import javax.swing.JLabel;

import javax.swing.JList;

import javax.swing.event.ListSelectionEvent;

import org.apache.commons.io.FilenameUtils;

import org.apache.commons.lang3.StringUtils;

import org.gvsig.expressionevaluator.ExpressionEvaluatorLocator;

import org.gvsig.expressionevaluator.ExpressionEvaluatorManager;

import org.gvsig.expressionevaluator.Function;

import org.gvsig.expressionevaluator.SymbolTable;

import org.gvsig.expressionevaluator.SymbolTableFactory;

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

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

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

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

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

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

import org.gvsig.fmap.dal.swing.impl.featuretype.FeatureAttributeListCellRenderer;

import org.gvsig.fmap.dal.swing.impl.featuretype.DefaultFeatureAttributesSelectionPanel;

import org.gvsig.tools.dataTypes.DataType;

import org.gvsig.tools.swing.api.FilteredListController;

import org.gvsig.tools.swing.api.ToolsSwingLocator;

import org.gvsig.tools.swing.api.ToolsSwingManager;

import org.gvsig.tools.swing.icontheme.IconTheme;

import org.gvsig.fmap.dal.swing.featurequery.FeatureQueryGroupByPanel;

/**

 *

 * @author jjdelcerro

 */

public class DefaultFeatureQueryGroupByPanel

        extends DefaultFeatureQueryGroupByPanelView

        implements FeatureQueryGroupByPanel {

  private class AttributesWithAggregateRenderer extends FeatureAttributeListCellRenderer {

    @Override

    public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {

      JLabel c = (JLabel) super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus); //To change body of generated methods, choose Tools | Templates.

      FeatureAttributeDescriptor attrdesc = (FeatureAttributeDescriptor) value;

      String aggregate = query.getAggregateFunctions().get(attrdesc.getName());

      if( aggregate !=null ) {

        c.setText(c.getText() + "  ["+aggregate+"]");

      } else {

        c.setText(c.getText() + "  [<NULL>]");

      }

      return c;

    }

  }

  private FeatureStore store;

  private FeatureType featureType;

  private FilteredListController aggregateFunctionsController;

  private DefaultFeatureAttributesSelectionPanel groupByPanel;

  private FeatureQuery query;

  public DefaultFeatureQueryGroupByPanel() {

    this.initComponents();

  }

  @Override

  public JComponent asJComponent() {

    return this;

  }

  @Override

  public ImageIcon loadImage(String imageName) {

    String name = FilenameUtils.getBaseName(imageName);

    IconTheme theme = ToolsSwingLocator.getIconThemeManager().getDefault();

    if (theme.exists(name)) {

      return theme.get(name);

    }

    URL url = this.getClass().getResource(name + ".png");

    if (url == null) {

      return null;

    }

    return new ImageIcon(url);

  }

  @Override

  public void setStore(FeatureStore store) {

    try {

      this.featureType = store.getDefaultFeatureType();

      this.store = store;

      this.query = store.createFeatureQuery();

      this.updateControls();

    } catch (DataException ex) {

      throw new RuntimeException("Can't assign store", ex);

    }

  }

  private void initComponents() {

    ToolsSwingManager toolsSwingManager = ToolsSwingLocator.getToolsSwingManager();

    this.groupByPanel = new DefaultFeatureAttributesSelectionPanel();

    this.pnlGroupByAttributes.setLayout(new BorderLayout());

    this.pnlGroupByAttributes.add(this.groupByPanel, BorderLayout.CENTER);

    this.lstAttributes.setCellRenderer(new AttributesWithAggregateRenderer());

    this.lstAttributes.addListSelectionListener((ListSelectionEvent e) -> {

      if (e.getValueIsAdjusting()) {

        return;

      }

      doSelectAttribute();

    });

    this.aggregateFunctionsController = toolsSwingManager.createFilteredListController(

            lstAttributes,

            txtAttributesFilter,

            btnAttributesFilter

    );

    Dimension sz = this.getPreferredSize();

    if (sz.width < DEFAULT_WIDTH) {

      sz.width = DEFAULT_WIDTH;

    }

    if (sz.height < DEFAULT_HEIGHT) {

      sz.height = DEFAULT_HEIGHT;

    }

    this.setPreferredSize(sz);

  }

  private void doSelectAttribute() {

    String previuos = this.txtCurrentAttributeName.getText();

    if( !StringUtils.isBlank(previuos) ) {

      String aggregate = (String) this.cboAggretateFunctions.getSelectedItem();

      if( StringUtils.isBlank(aggregate) || aggregate.equalsIgnoreCase("<NULL>") ) {

        this.query.getAggregateFunctions().remove(previuos);

      } else {

        this.query.getAggregateFunctions().put(previuos, aggregate);

      }

      this.updateControls();

    }

    FeatureAttributeDescriptor attr = (FeatureAttributeDescriptor) this.lstAttributes.getSelectedValue();

    if( attr == null ) {

      return;

    }

    this.txtCurrentAttributeName.setText(attr.getName());

    String aggregate = this.query.getAggregateFunctions().get(attr.getName());

    if( StringUtils.isBlank(aggregate) || aggregate.equalsIgnoreCase("<NULL>") ) {

      this.cboAggretateFunctions.setSelectedIndex(0);

    } else {

      this.cboAggretateFunctions.setSelectedItem(aggregate);

    }    

  }

  private void updateControls() {

    if( this.cboAggretateFunctions.getModel().getSize() < 1 ) {

      DefaultComboBoxModel<String> model = new DefaultComboBoxModel<>();

      model.addElement("<NULL>");

      java.util.function.Function<String, Integer> isAllowed = ((FeatureStoreProviderFactory)(store.getProviderFactory())).allowFunction();

      ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager();    

      for (SymbolTableFactory factory : manager.getSymbolTableFactories()) {

        if( StringUtils.equalsIgnoreCase(Function.GROUP_AGGREGATE, factory.getName()) ) {

          SymbolTable symbolTable = factory.create();

          for (Function function : symbolTable) {

            if( isAllowed.apply(function.name())!=DataType.NO ) {

              model.addElement(function.name());

            }

          }

          break;

        }

      }

      this.cboAggretateFunctions.setModel(model);

      this.cboAggretateFunctions.setSelectedIndex(0);

      this.txtCurrentAttributeName.setText("");

    }

    this.groupByPanel.setFeatureType(featureType);

    this.groupByPanel.setSelectedNames(query.getGroupByColumns());

    DefaultListModel<FeatureAttributeDescriptor> model = new DefaultListModel<>();

    for (FeatureAttributeDescriptor attr : featureType) {

      model.addElement(attr);

    }

    this.lstAttributes.setModel(model);

    this.txtCurrentAttributeName.setText("");

    this.cboAggretateFunctions.setSelectedIndex(0);

  }

  @Override

  public FeatureQuery fetch(FeatureQuery query) {

    if( query == null ) {

      return this.query.getCopy();

    }

    query.getGroupByColumns().clear();

    query.getGroupByColumns().addAll(this.query.getGroupByColumns());

    query.getAggregateFunctions().clear();

    query.getAggregateFunctions().putAll(this.query.getAggregateFunctions());

    return query;

  }

  @Override

  public FeatureQuery fetch() {

    return this.fetch(null);

  }

  @Override

  public void put(FeatureQuery query) {

    this.query.copyFrom(query);

    this.updateControls();

  }

  public static void selfRegister() {

  }

}