BaseSchemasGrid.java

/*
 * Copyright 2014-2016 CyberVision, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.kaaproject.kaa.server.admin.client.mvp.view.schema;

import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.safehtml.shared.SafeHtmlUtils;
import com.google.gwt.user.cellview.client.Column;
import com.google.gwt.user.cellview.client.DataGrid;
import com.google.gwt.user.cellview.client.Header;
import com.google.gwt.user.cellview.client.SafeHtmlHeader;

import org.kaaproject.avro.ui.gwt.client.widget.grid.cell.ActionButtonCell;
import org.kaaproject.avro.ui.gwt.client.widget.grid.event.RowActionEvent;
import org.kaaproject.kaa.common.dto.AbstractSchemaDto;
import org.kaaproject.kaa.server.admin.client.mvp.view.grid.AbstractKaaGrid;
import org.kaaproject.kaa.server.admin.client.mvp.view.grid.KaaRowAction;
import org.kaaproject.kaa.server.admin.client.util.Utils;

import java.util.Comparator;

public class BaseSchemasGrid<T extends AbstractSchemaDto> extends AbstractKaaGrid<T, String> {

  private Column<T, T> downloadSchemaColumn;

  public BaseSchemasGrid() {
    super(Unit.PX, false);
  }

  @Override
  protected float constructColumnsImpl(DataGrid<T> table) {
    float prefWidth = 0;

    prefWidth += constructStringColumn(table,
        Utils.constants.version(),
        new StringValueProvider<T>() {
          @Override
          public String getValue(T item) {
            return item.getVersion() + "";
          }
        },
        new Comparator<T>() {
          @Override
          public int compare(T o1, T o2) {
            return o1.compareTo(o2);
          }
        },
        Boolean.FALSE,
        80);

    prefWidth += constructStringColumn(table,
        Utils.constants.name(),
        new StringValueProvider<T>() {
          @Override
          public String getValue(T item) {
            return item.getName();
          }
        },
        new Comparator<T>() {
          @Override
          public int compare(T o1, T o2) {
            return o1.getName().compareToIgnoreCase(o2.getName());
          }
        },
        null,
        80);

    prefWidth += constructStringColumn(table,
        Utils.constants.author(),
        new StringValueProvider<T>() {
          @Override
          public String getValue(T item) {
            return item.getCreatedUsername();
          }
        }, 80);

    prefWidth += constructStringColumn(table,
        Utils.constants.dateCreated(),
        new StringValueProvider<T>() {
          @Override
          public String getValue(T item) {
            return Utils.millisecondsToDateString(item.getCreatedTime());
          }
        }, 80);

    prefWidth += constructStringColumn(table,
        Utils.constants.numberOfEps(),
        new StringValueProvider<T>() {
          @Override
          public String getValue(T item) {
            return item.getEndpointCount() + "";
          }
        }, 80);

    return prefWidth;
  }

  @Override
  protected float constructActions(DataGrid<T> table, float prefWidth) {
    float result = 0;
    if (!embedded
        && (downloadSchemaColumn == null || table.getColumnIndex(downloadSchemaColumn) == -1)) {
      Header<SafeHtml> downloadRecordSchemaHeader = new SafeHtmlHeader(
          SafeHtmlUtils.fromSafeConstant(Utils.constants.downloadRecordSchema()));
      downloadSchemaColumn = constructDownloadSchemaColumn("");
      table.addColumn(downloadSchemaColumn, downloadRecordSchemaHeader);
      table.setColumnWidth(downloadSchemaColumn, ACTION_COLUMN_WIDTH, Unit.PX);
      result += ACTION_COLUMN_WIDTH;
    }
    return result;
  }

  protected Column<T, T> constructDownloadSchemaColumn(String text) {
    ActionButtonCell<T> cell = new ActionButtonCell<T>(
        Utils.resources.download_grey(), text, embedded,
        new ActionButtonCell.ActionListener<T>() {
          @Override
          public void onItemAction(T value) {
            Integer schemaVersion = getDownloadSchemaColumnClickedId(value);
            RowActionEvent<String> rowDownloadSchemaEvent =
                new RowActionEvent<>(String.valueOf(schemaVersion), KaaRowAction.DOWNLOAD_SCHEMA);
            fireEvent(rowDownloadSchemaEvent);
          }
        }, new ActionButtonCell.ActionValidator<T>() {
          @Override
          public boolean canPerformAction(T value) {
            return !embedded;
          }
        });
    Column<T, T> column = new Column<T, T>(cell) {
      @Override
      public T getValue(T item) {
        return item;
      }
    };
    return column;
  }

  protected Integer getDownloadSchemaColumnClickedId(T value) {
    return value.getVersion();
  }
}