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src/java.desktop/share/classes/sun/awt/ComponentFactory.java

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   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.awt;
  27 

  28 import java.awt.*;
  29 import java.awt.dnd.DragGestureEvent;
  30 import java.awt.dnd.InvalidDnDOperationException;
  31 import java.awt.dnd.peer.DragSourceContextPeer;
  32 import java.awt.peer.*;
  33 
  34 import sun.awt.datatransfer.DataTransferer;
  35 
  36 final class LightweightPeerHolder {
  37     static final LightweightPeer lightweightMarker = new NullComponentPeer();
  38 
  39     private LightweightPeerHolder() {
  40     }
  41 }
  42 
  43 /**
  44  * Interface for component creation support in toolkits.
  45  */
  46 public interface ComponentFactory {
  47 


  54      * @return the peer for the specified component
  55      */
  56     default LightweightPeer createComponent(Component target) {
  57         return LightweightPeerHolder.lightweightMarker;
  58     }
  59 
  60     /**
  61      * Creates this toolkit's implementation of the {@code Desktop} using the
  62      * specified peer interface.
  63      *
  64      * @param  target the desktop to be implemented
  65      * @return this toolkit's implementation of the {@code Desktop}
  66      * @throws HeadlessException if GraphicsEnvironment.isHeadless() returns
  67      *         true
  68      * @see java.awt.GraphicsEnvironment#isHeadless
  69      * @see java.awt.Desktop
  70      * @see java.awt.peer.DesktopPeer
  71      * @since 1.6
  72      */
  73     default DesktopPeer createDesktopPeer(Desktop target) {

















  74         throw new HeadlessException();
  75     }
  76 
  77     /**
  78      * Creates this toolkit's implementation of {@code Button} using the
  79      * specified peer interface.
  80      *
  81      * @param  target the button to be implemented
  82      * @return this toolkit's implementation of {@code Button}
  83      * @throws HeadlessException if GraphicsEnvironment.isHeadless() returns
  84      *         true
  85      * @see java.awt.GraphicsEnvironment#isHeadless
  86      * @see java.awt.Button
  87      * @see java.awt.peer.ButtonPeer
  88      */
  89     default ButtonPeer createButton(Button target) {
  90         throw new HeadlessException();
  91     }
  92 
  93     /**




   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.awt;
  27 
  28 import java.awt.peer.TaskbarPeer;
  29 import java.awt.*;
  30 import java.awt.dnd.DragGestureEvent;
  31 import java.awt.dnd.InvalidDnDOperationException;
  32 import java.awt.dnd.peer.DragSourceContextPeer;
  33 import java.awt.peer.*;
  34 
  35 import sun.awt.datatransfer.DataTransferer;
  36 
  37 final class LightweightPeerHolder {
  38     static final LightweightPeer lightweightMarker = new NullComponentPeer();
  39 
  40     private LightweightPeerHolder() {
  41     }
  42 }
  43 
  44 /**
  45  * Interface for component creation support in toolkits.
  46  */
  47 public interface ComponentFactory {
  48 


  55      * @return the peer for the specified component
  56      */
  57     default LightweightPeer createComponent(Component target) {
  58         return LightweightPeerHolder.lightweightMarker;
  59     }
  60 
  61     /**
  62      * Creates this toolkit's implementation of the {@code Desktop} using the
  63      * specified peer interface.
  64      *
  65      * @param  target the desktop to be implemented
  66      * @return this toolkit's implementation of the {@code Desktop}
  67      * @throws HeadlessException if GraphicsEnvironment.isHeadless() returns
  68      *         true
  69      * @see java.awt.GraphicsEnvironment#isHeadless
  70      * @see java.awt.Desktop
  71      * @see java.awt.peer.DesktopPeer
  72      * @since 1.6
  73      */
  74     default DesktopPeer createDesktopPeer(Desktop target) {
  75         throw new HeadlessException();
  76     }
  77     
  78     /**
  79      * Creates this toolkit's implementation of the {@code Taskbar} using the
  80      * specified peer interface.
  81      *
  82      * @param  target the taskbar to be implemented
  83      * @return this toolkit's implementation of the {@code Taskbar}
  84      * @throws HeadlessException if GraphicsEnvironment.isHeadless() returns
  85      *         true
  86      * @see java.awt.GraphicsEnvironment#isHeadless
  87      * @see java.awt.Taskbar
  88      * @see java.awt.peer.TaskbarPeer
  89      * @since 1.9
  90      */
  91     default TaskbarPeer createTaskbarPeer(Taskbar target) {
  92         throw new HeadlessException();
  93     }
  94 
  95     /**
  96      * Creates this toolkit's implementation of {@code Button} using the
  97      * specified peer interface.
  98      *
  99      * @param  target the button to be implemented
 100      * @return this toolkit's implementation of {@code Button}
 101      * @throws HeadlessException if GraphicsEnvironment.isHeadless() returns
 102      *         true
 103      * @see java.awt.GraphicsEnvironment#isHeadless
 104      * @see java.awt.Button
 105      * @see java.awt.peer.ButtonPeer
 106      */
 107     default ButtonPeer createButton(Button target) {
 108         throw new HeadlessException();
 109     }
 110 
 111     /**


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