Field: isEnumConstant() : Field « java.lang.reflect « Java by API

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2. java.lang.reflect
3. Field

Field: isEnumConstant()

 

/*
 * Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Sun Microsystems nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

import static java.lang.System.out;

import java.lang.reflect.Field;
import java.lang.reflect.Modifier;

enum Spy {
  BLACK, WHITE
}

public class Main {
  volatile int share;
  int instance;

  class Inner {
  }

  public static void main(String... args) {
    try {
      Class<?> c = Class.forName(args[0]);
      int searchMods = 0x0;
      for (int i = 1; i < args.length; i++) {
        searchMods |= modifierFromString(args[i]);
      }

      Field[] flds = c.getDeclaredFields();
      out.format("Fields in Class '%s' containing modifiers:  %s%n", c
          .getName(), Modifier.toString(searchMods));
      boolean found = false;
      for (Field f : flds) {
        int foundMods = f.getModifiers();
        // Require all of the requested modifiers to be present
        if ((foundMods & searchMods) == searchMods) {
          out.format("%-8s [ synthetic=%-5b enum_constant=%-5b ]%n", f
              .getName(), f.isSynthetic(), f.isEnumConstant());
          found = true;
        }
      }

      if (!found) {
        out.format("No matching fields%n");
      }

      // production code should handle this exception more gracefully
    } catch (ClassNotFoundException x) {
      x.printStackTrace();
    }
  }

  private static int modifierFromString(String s) {
    int m = 0x0;
    if ("public".equals(s))
      m |= Modifier.PUBLIC;
    else if ("protected".equals(s))
      m |= Modifier.PROTECTED;
    else if ("private".equals(s))
      m |= Modifier.PRIVATE;
    else if ("static".equals(s))
      m |= Modifier.STATIC;
    else if ("final".equals(s))
      m |= Modifier.FINAL;
    else if ("transient".equals(s))
      m |= Modifier.TRANSIENT;
    else if ("volatile".equals(s))
      m |= Modifier.VOLATILE;
    return m;
  }
}

   
  

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