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1   /**
2    * This file Copyright (c) 2020 Magnolia International
3    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
4    *
5    *
6    * This file is dual-licensed under both the Magnolia
7    * Network Agreement and the GNU General Public License.
8    * You may elect to use one or the other of these licenses.
9    *
10   * This file is distributed in the hope that it will be
11   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
12   * implied warranty of MERCHANTABILITY or FITNESS FOR A
13   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
14   * Redistribution, except as permitted by whichever of the GPL
15   * or MNA you select, is prohibited.
16   *
17   * 1. For the GPL license (GPL), you can redistribute and/or
18   * modify this file under the terms of the GNU General
19   * Public License, Version 3, as published by the Free Software
20   * Foundation.  You should have received a copy of the GNU
21   * General Public License, Version 3 along with this program;
22   * if not, write to the Free Software Foundation, Inc., 51
23   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
24   *
25   * 2. For the Magnolia Network Agreement (MNA), this file
26   * and the accompanying materials are made available under the
27   * terms of the MNA which accompanies this distribution, and
28   * is available at http://www.magnolia-cms.com/mna.html
29   *
30   * Any modifications to this file must keep this entire header
31   * intact.
32   *
33   */
34  package info.magnolia.ui.contentapp.browser.drop;
35  
36  import java.util.Arrays;
37  import java.util.List;
38  
39  import com.vaadin.shared.ui.grid.DropLocation;
40  
41  /**
42   * This class implements a composite of multiple {@link DropConstraint}s.
43   * It evaluates to {@code true} if any only if all its components return {@code true}.
44   */
45  public class CompositeDropConstraint<T> implements DropConstraint<T> {
46      private final List<DropConstraint<T>> dropConstraints;
47  
48      @SafeVarargs
49      public CompositeDropConstraint(DropConstraint<T>... dropConstraints) {
50          this.dropConstraints = Arrays.asList(dropConstraints);
51      }
52  
53      @Override
54      public boolean isAllowedAt(T source, T target, DropLocation dropLocation) {
55          return dropConstraints.stream().allMatch(dropConstraint ->
56                  dropConstraint.isAllowedAt(source, target, dropLocation));
57      }
58  }