CtlSchemaReferenceBox.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.widget;

import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.ui.HasConstrainedValue;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.RequiresResize;

import org.kaaproject.avro.ui.gwt.client.widget.FqnReferenceBox;
import org.kaaproject.avro.ui.shared.Fqn;
import org.kaaproject.avro.ui.shared.FqnKey;
import org.kaaproject.avro.ui.shared.FqnVersion;
import org.kaaproject.kaa.server.admin.client.util.Utils;
import org.kaaproject.kaa.server.admin.shared.schema.CtlSchemaReferenceDto;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class CtlSchemaReferenceBox
    extends HorizontalPanel
    implements HasConstrainedValue<CtlSchemaReferenceDto>, RequiresResize {

  private CtlSchemaReferenceDto value;

  private FqnReferenceBox fqnReferenceBox;
  private IntegerListBox versionsBox;

  private Map<Fqn, List<Integer>> fqnVersionsMap = new HashMap<>();
  private Map<FqnVersion, CtlSchemaReferenceDto> fqnVersionToReferenceMap = new HashMap<>();

  /**
   * Instantiates a new CtlSchemaReferenceBox.
   */
  public CtlSchemaReferenceBox() {
    fqnReferenceBox = new FqnReferenceBox(Utils.constants.schemaReferencePrompt());
    fqnReferenceBox.setWidth("100%");
    add(fqnReferenceBox);
    this.setCellWidth(fqnReferenceBox, "100%");
    versionsBox = new IntegerListBox();
    versionsBox.setWidth("60px");
    versionsBox.setHeight("100%");
    versionsBox.getElement().getStyle().setPaddingTop(2, Unit.PX);
    versionsBox.getElement().getStyle().setPaddingBottom(1, Unit.PX);
    versionsBox.getElement().getStyle().setMarginLeft(6, Unit.PX);
    add(versionsBox);

    fqnReferenceBox.addValueChangeHandler(new ValueChangeHandler<FqnKey>() {
      @Override
      public void onValueChange(ValueChangeEvent<FqnKey> event) {
        updateValueByFqnKeyAndVersion(event.getValue(), null);
      }
    });

    versionsBox.addValueChangeHandler(new ValueChangeHandler<Integer>() {
      @Override
      public void onValueChange(ValueChangeEvent<Integer> event) {
        updateValueByFqnKeyAndVersion(fqnReferenceBox.getValue(), event.getValue());
      }
    });
  }

  private void updateValueByFqnKeyAndVersion(FqnKey fqnKey, Integer version) {
    CtlSchemaReferenceDto newValue = null;
    if (fqnKey != null) {
      Fqn fqn = fqnKey.getFqn();
      if (version == null) {
        List<Integer> versions = fqnVersionsMap.get(fqn);
        version = Collections.max(versions);
      }
      FqnVersion fqnVersion = new FqnVersion(fqn, version);
      newValue = fqnVersionToReferenceMap.get(fqnVersion);
    }
    setValue(newValue, true);
  }

  @Override
  public CtlSchemaReferenceDto getValue() {
    return value;
  }

  @Override
  public void setValue(CtlSchemaReferenceDto value) {
    setValue(value, false);
  }

  @Override
  public void setValue(CtlSchemaReferenceDto value, boolean fireEvents) {
    if (value == this.value
        || (this.value != null && this.value.equals(value))) {
      return;
    }
    CtlSchemaReferenceDto before = this.value;
    this.value = value;

    updateBox();

    if (fireEvents) {
      ValueChangeEvent.fireIfNotEqual(this, before, value);
    }
  }

  @Override
  public HandlerRegistration addValueChangeHandler(
      ValueChangeHandler<CtlSchemaReferenceDto> handler) {
    return addHandler(handler, ValueChangeEvent.getType());
  }

  @Override
  public void setAcceptableValues(Collection<CtlSchemaReferenceDto> values) {
    fqnVersionsMap.clear();
    fqnVersionToReferenceMap.clear();
    Map<FqnKey, Fqn> declaredFqns = new HashMap<>();

    for (CtlSchemaReferenceDto ctlReference : values) {
      Fqn fqn = new Fqn(ctlReference.getMetaInfo().getFqn());
      FqnKey fqnKey = new FqnKey(fqn);
      declaredFqns.put(fqnKey, fqn);

      List<Integer> versions = fqnVersionsMap.get(fqn);
      if (versions == null) {
        versions = new ArrayList<>();
        fqnVersionsMap.put(fqn, versions);
      }
      versions.add(ctlReference.getVersion());

      fqnVersionToReferenceMap.put(new FqnVersion(fqn, ctlReference.getVersion()), ctlReference);
    }
    fqnReferenceBox.updateDeclaredFqns(declaredFqns);

    updateBox();
  }

  /**
   * Reset.
   */
  public void reset() {
    value = null;
    fqnVersionsMap.clear();
    fqnVersionToReferenceMap.clear();
    fqnReferenceBox.reset();
    versionsBox.reset();
  }

  private void updateBox() {
    if (value != null) {
      Fqn fqn = new Fqn(value.getMetaInfo().getFqn());
      fqnReferenceBox.setValue(new FqnKey(fqn));
      List<Integer> versions = fqnVersionsMap.get(fqn);
      Collections.sort(versions);
      versionsBox.setValue(value.getVersion());
      versionsBox.setAcceptableValues(versions);
    } else {
      fqnReferenceBox.setValue(null);
      versionsBox.reset();
    }
  }

  @Override
  public void onResize() {
    fqnReferenceBox.onShown();
  }

}