/*
Copyright 2011-2016 Google Inc. All Rights Reserved.

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 com.google.security.zynamics.zylib.gui.zygraph.helpers;

import com.google.security.zynamics.zylib.gui.zygraph.nodes.IViewNode;
import com.google.security.zynamics.zylib.types.common.CollectionHelpers;
import com.google.security.zynamics.zylib.types.common.ICollectionFilter;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.grouping.GroupHelpers;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.nodes.ZyGraphNode;

import java.util.Collection;


public class SelectedVisibleFilter<NodeType extends ZyGraphNode<? extends IViewNode<?>>> implements
    ICollectionFilter<NodeType> {
  public static <NodeType extends ZyGraphNode<? extends IViewNode<?>>> Collection<NodeType> filter(
      final Collection<NodeType> collection) {
    return CollectionHelpers.filter(collection, new SelectedVisibleFilter<NodeType>());
  }

  @Override
  public boolean qualifies(final NodeType node) {
    final IViewNode<?> rawNode = node.getRawNode();

    return (rawNode.getParentGroup() == null) || GroupHelpers.isExpanded(rawNode.getParentGroup());
  }
}
