< prev index next >

src/java.desktop/share/classes/java/beans/NameGenerator.java

Print this page




  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 package java.beans;
  26 
  27 import java.util.HashMap;
  28 import java.util.IdentityHashMap;
  29 import java.util.Map;
  30 
  31 import static java.util.Locale.ENGLISH;
  32 
  33 /**
  34  * A utility class which generates unique names for object instances.
  35  * The name will be a concatenation of the unqualified class name
  36  * and an instance number.
  37  * <p>
  38  * For example, if the first object instance javax.swing.JButton
  39  * is passed into <code>instanceName</code> then the returned
  40  * string identifier will be &quot;JButton0&quot;.
  41  *
  42  * @author Philip Milne
  43  */
  44 class NameGenerator {
  45 
  46     private Map<Object, String> valueToName;
  47     private Map<String, Integer> nameToCount;
  48 
  49     public NameGenerator() {
  50         valueToName = new IdentityHashMap<>();
  51         nameToCount = new HashMap<>();
  52     }
  53 
  54     /**
  55      * Clears the name cache. Should be called to near the end of
  56      * the encoding cycle.
  57      */
  58     public void clear() {
  59         valueToName.clear();




  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 package java.beans;
  26 
  27 import java.util.HashMap;
  28 import java.util.IdentityHashMap;
  29 import java.util.Map;
  30 
  31 import static java.util.Locale.ENGLISH;
  32 
  33 /**
  34  * A utility class which generates unique names for object instances.
  35  * The name will be a concatenation of the unqualified class name
  36  * and an instance number.
  37  * <p>
  38  * For example, if the first object instance javax.swing.JButton
  39  * is passed into {@code instanceName} then the returned
  40  * string identifier will be &quot;JButton0&quot;.
  41  *
  42  * @author Philip Milne
  43  */
  44 class NameGenerator {
  45 
  46     private Map<Object, String> valueToName;
  47     private Map<String, Integer> nameToCount;
  48 
  49     public NameGenerator() {
  50         valueToName = new IdentityHashMap<>();
  51         nameToCount = new HashMap<>();
  52     }
  53 
  54     /**
  55      * Clears the name cache. Should be called to near the end of
  56      * the encoding cycle.
  57      */
  58     public void clear() {
  59         valueToName.clear();


< prev index next >