Java Modifier.TRANSIENT屬性代碼示例

/**
 * Encodes the declared fields of the given object into the given node.
 * 
 * @param enc Codec that controls the encoding process.
 * @param obj Object whose fields should be encoded.
 * @param node XML node that contains the encoded object.
 */
protected void encodeFields(mxCodec enc, Object obj, Node node)
{
	// LATER: Use PropertyDescriptors in Introspector.getBeanInfo(clazz)
	// see http://forum.jgraph.com/questions/1424
	Class<?> type = obj.getClass();

	while (type != null)
	{
		Field[] fields = type.getDeclaredFields();

		for (int i = 0; i < fields.length; i++)
		{
			Field f = fields[i];

			if ((f.getModifiers() & Modifier.TRANSIENT) != Modifier.TRANSIENT)
			{
				String fieldname = f.getName();
				Object value = getFieldValue(obj, fieldname);
				encodeValue(enc, obj, fieldname, value, node);
			}
		}

		type = type.getSuperclass();
	}
}
 

/**
 * Encodes the declared fields of the given object into the given node.
 * 
 * @param enc Codec that controls the encoding process.
 * @param obj Object whose fields should be encoded.
 * @param node XML node that contains the encoded object.
 */
protected void encodeFields(mxCodec enc, Object obj, Node node) {
  // LATER: Use PropertyDescriptors in Introspector.getBeanInfo(clazz)
  // see http://forum.jgraph.com/questions/1424
  Class<?> type = obj.getClass();

  while (type != null) {
    Field[] fields = type.getDeclaredFields();

    for (int i = 0; i < fields.length; i++) {
      Field f = fields[i];

      if ((f.getModifiers() & Modifier.TRANSIENT) != Modifier.TRANSIENT) {
        String fieldname = f.getName();
        Object value = getFieldValue(obj, fieldname);
        encodeValue(enc, obj, fieldname, value, node);
      }
    }

    type = type.getSuperclass();
  }
}
 

public static void main(String [] argv) {
    int allMods = Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE |
        Modifier.ABSTRACT | Modifier.STATIC | Modifier.FINAL |
        Modifier.TRANSIENT | Modifier.VOLATILE | Modifier.SYNCHRONIZED |
        Modifier.NATIVE | Modifier.STRICT | Modifier.INTERFACE;

    String allModsString = "public protected private abstract static " +
        "final transient volatile synchronized native strictfp interface";

    /* zero should have an empty string */
    testString(0, "");

    /* test to make sure all modifiers print out in the proper order */
    testString(allMods, allModsString);

    /* verify no extraneous modifiers are printed */
    testString(~0, allModsString);
}
 

/**
 * Writes edited code back to the CustomCodeData structure.
 */
CustomCodeData retreiveCodeData() {
    retreiveCodeData(CodeCategory.CREATE_AND_INIT);
    retreiveCodeData(CodeCategory.DECLARATION);

    VariableDeclaration decl = codeData.getDeclarationData();
    boolean local = variableValues[variableCombo.getSelectedIndex()];
    int modifiers;
    if (local != decl.local) {
        modifiers = local ? lastLocalModifiers : lastFieldModifiers;
        if (finalCheckBox.isSelected()) // only final makes sense for both local and field scope
            modifiers |= Modifier.FINAL;
        else
            modifiers &= ~Modifier.FINAL;
    }
    else {
        modifiers = accessValues[accessCombo.getSelectedIndex()];
        if (staticCheckBox.isSelected())
            modifiers |= Modifier.STATIC;
        if (finalCheckBox.isSelected())
            modifiers |= Modifier.FINAL;
        if (transientCheckBox.isSelected())
            modifiers |= Modifier.TRANSIENT;
        if (volatileCheckBox.isSelected())
            modifiers |= Modifier.VOLATILE;
        if (local)
            modifiers &= ~(Modifier.STATIC | Modifier.TRANSIENT | Modifier.VOLATILE);
    }
    decl.local = local;
    decl.modifiers = modifiers;

    return codeData;
}
 

/**
 * Convert modifier bits from private coding used by
 * the compiler to that of java.lang.reflect.Modifier.
 */
static int translateModifiers(long flags) {
    int result = 0;
    if ((flags & Flags.ABSTRACT) != 0)
        result |= Modifier.ABSTRACT;
    if ((flags & Flags.FINAL) != 0)
        result |= Modifier.FINAL;
    if ((flags & Flags.INTERFACE) != 0)
        result |= Modifier.INTERFACE;
    if ((flags & Flags.NATIVE) != 0)
        result |= Modifier.NATIVE;
    if ((flags & Flags.PRIVATE) != 0)
        result |= Modifier.PRIVATE;
    if ((flags & Flags.PROTECTED) != 0)
        result |= Modifier.PROTECTED;
    if ((flags & Flags.PUBLIC) != 0)
        result |= Modifier.PUBLIC;
    if ((flags & Flags.STATIC) != 0)
        result |= Modifier.STATIC;
    if ((flags & Flags.SYNCHRONIZED) != 0)
        result |= Modifier.SYNCHRONIZED;
    if ((flags & Flags.TRANSIENT) != 0)
        result |= Modifier.TRANSIENT;
    if ((flags & Flags.VOLATILE) != 0)
        result |= Modifier.VOLATILE;
    return result;
}
 

/**
 * Returns array of ObjectStreamFields corresponding to all non-static
 * non-transient fields declared by given class.  Each ObjectStreamField
 * contains a Field object for the field it represents.  If no default
 * serializable fields exist, NO_FIELDS is returned.
 */
private static ObjectStreamField[] getDefaultSerialFields(Class<?> cl) {
    Field[] clFields = cl.getDeclaredFields();
    ArrayList<ObjectStreamField> list = new ArrayList<>();
    int mask = Modifier.STATIC | Modifier.TRANSIENT;

    for (int i = 0; i < clFields.length; i++) {
        if ((clFields[i].getModifiers() & mask) == 0) {
            list.add(new ObjectStreamField(clFields[i], false, true));
        }
    }
    int size = list.size();
    return (size == 0) ? NO_FIELDS :
        list.toArray(new ObjectStreamField[size]);
}
 

private void processTypes(final Set<Class<?>> types) {
    while (!types.isEmpty()) {
        final Iterator<Class<?>> iter = types.iterator();
        final Class<?> type = iter.next();
        iter.remove();

        synchronized (type) {
            if (annotatedTypes.contains(type)) {
                continue;
            }
            try {
                if (type.isPrimitive()) {
                    continue;
                }

                addParametrizedTypes(type, types);

                processConverterAnnotations(type);
                processAliasAnnotation(type, types);
                processAliasTypeAnnotation(type);

                if (type.isInterface()) {
                    continue;
                }

                final Field[] fields = type.getDeclaredFields();
                for (final Field field : fields) {
                    if (field.isEnumConstant()
                        || (field.getModifiers() & (Modifier.STATIC | Modifier.TRANSIENT)) > 0) {
                        continue;
                    }

                    addParametrizedTypes(field.getGenericType(), types);

                    if (field.isSynthetic()) {
                        continue;
                    }

                    processFieldAliasAnnotation(field);
                    processAsAttributeAnnotation(field);
                    processImplicitAnnotation(field);
                    processOmitFieldAnnotation(field);
                    processLocalConverterAnnotation(field);
                }
            } finally {
                annotatedTypes.add(type);
            }
        }
    }
}
 

private void populateCriteriaForExample(Criteria criteria, Object object) {
	Class<?> clazz = object.getClass();
	if (ExampleLimit.class.isAssignableFrom(clazz)) {
		ExampleLimit limit = (ExampleLimit) object;
		if (limit.getFirstResult() != null) {
			criteria.setFirstResult(limit.getFirstResult());
		}
		if (limit.getMaxResults() != null) {
			criteria.setMaxResults(limit.getMaxResults());
		}
	}
	List <Criterion> ors = new LinkedList<Criterion>();
	while (!Object.class.equals(clazz)) {
		Field[] fields = clazz.getDeclaredFields();
		int max = fields.length;
		for (int i = 0; i < max; i++) {
			Field field = fields[i];
			if ((field.getModifiers() & (Modifier.STATIC | Modifier.TRANSIENT)) == 0
					/* && (field.getType().isPrimitive()
							||field.getType().getName().startsWith("java.lang")) */) {
				field.setAccessible(true);
				String name = field.getName();
				Object value = null;
				try {
					value = field.get(object);
				} catch (IllegalArgumentException | IllegalAccessException e) {
				}
				if (value != null) {
					if (name.endsWith("From")) {

					} else if (name.endsWith("To")) {

					} else if (name.endsWith("NotIn")) {
						criteria.add(Restrictions.not(Restrictions.in(name.substring(0, name.length() - 5), (Collection<?>) value)));
					} else if (name.endsWith("In") && value instanceof Collection<?>) {
						criteria.add(Restrictions.in(name.substring(0, name.length() - 2), (Collection<?>) value));
					} else if (name.endsWith("Like")) {
						ors.add(Restrictions.ilike(name.substring(0, name.length() - 4), value.toString().toLowerCase() + "%"));
						} else if (value.getClass().getName().startsWith("java.lang")){
						criteria.add(Restrictions.eq(name, value));
					}
				}
			}
		}
		clazz = clazz.getSuperclass();
	}
	switch (ors.size()) {
	case 0:
		break;
	case 1:
		criteria.add(ors.get(0));
		break;
	default:
		criteria.add(Restrictions.or((Criterion[]) ors.toArray(new Criterion[ors.size()])));
		break;
	}
}
 

/**
 * 計算默認的 serialVersionUID
 *
 * @see java.io.ObjectStreamClass#lookup(Class)
 * @see java.io.ObjectStreamClass#computeDefaultSUID(Class)
 */
public static long computeDefaultSUID(String className, List<Field> fields) {
    try {
        ByteArrayOutputStream bout = new ByteArrayOutputStream();
        DataOutputStream dout = new DataOutputStream(bout);

        // simple class name
        dout.writeUTF(className);
        int classMods = Modifier.PUBLIC & (Modifier.PUBLIC | Modifier.FINAL | Modifier.INTERFACE | Modifier.ABSTRACT);
        dout.writeInt(classMods);

        // interface name
        dout.writeUTF("java.io.Serializable");

        // fields
        // fields.sort(Comparator.comparing(Field::getField));
        for (Field field : fields) {
            int mods = Modifier.PRIVATE &
                    (Modifier.PUBLIC | Modifier.PRIVATE | Modifier.PROTECTED |
                            Modifier.STATIC | Modifier.FINAL | Modifier.VOLATILE |
                            Modifier.TRANSIENT);
            if (((mods & Modifier.PRIVATE) == 0) ||
                    ((mods & (Modifier.STATIC | Modifier.TRANSIENT)) == 0)) {
                dout.writeUTF(field.getField());
                dout.writeInt(mods);
                dout.writeUTF(field.getFieldType());
            }
        }

        // method ignore
        dout.flush();

        MessageDigest md = MessageDigest.getInstance("SHA");
        byte[] hashBytes = md.digest(bout.toByteArray());
        long hash = 0;
        for (int i = Math.min(hashBytes.length, 8) - 1; i >= 0; i--) {
            hash = (hash << 8) | (hashBytes[i] & 0xFF);
        }
        return hash;
    } catch (Exception e) {
        // ignore
    }
    return 1;
}
 

synchronized void validateClassFormat(Class<? extends MVO> clazz) {
    if (wellFormedMvoClasses_.contains(clazz)) {
        return;
    }

    try {
        getMvoConstructorImpl(clazz);
    } catch (NoSuchMethodException nsme) {
        throw new MvoClassFormatException.ConstructorDefinition
                ("no mvo constructor found: " + clazz.getName());
    }

    for (Field field : getReflectionFields(clazz)) {
        String fieldFqn = clazz.getName() + "." + field.getName();
        if (MVO.MvoField.class.isAssignableFrom(field.getType())) {
            if ((field.getModifiers() & Modifier.FINAL) != Modifier.FINAL) {
                throw new MvoClassFormatException.FieldDefinition
                        ("mvo-field must be final: " + fieldFqn);
            }
            if ((field.getModifiers() & Modifier.STATIC) == Modifier.STATIC) {
                throw new MvoClassFormatException.FieldDefinition
                        ("mvo-field must not be static: " + fieldFqn);
            }
            if ((field.getModifiers() & Modifier.TRANSIENT) == Modifier.TRANSIENT) {
                throw new MvoClassFormatException.FieldDefinition
                        ("mvo-field is transient: " + fieldFqn);
            }
        } else {
            if ((field.getModifiers() & Modifier.STATIC) == Modifier.STATIC) {
                continue;
            }
            if ((field.getModifiers() & Modifier.TRANSIENT) == Modifier.TRANSIENT) {
                continue;
            }

            throw new MvoClassFormatException.FieldDefinition
                    ("the field is not serializable: " + fieldFqn);
        }
    }

    wellFormedMvoClasses_.add(clazz);
}
 

public static long getModifiers( PsiModifierList modifierList )
{
  long modifiers = 0;
  if( modifierList.hasExplicitModifier( PsiModifier.ABSTRACT ) )
  {
    modifiers |= Modifier.ABSTRACT;
  }
  if( modifierList.hasExplicitModifier( PsiModifier.DEFAULT ) )
  {
    modifiers |= 0x80000000000L; //Flags.DEFAULT;
  }
  if( modifierList.hasExplicitModifier( PsiModifier.FINAL ) )
  {
    modifiers |= Modifier.FINAL;
  }
  if( modifierList.hasExplicitModifier( PsiModifier.PRIVATE ) )
  {
    modifiers |= Modifier.PRIVATE;
  }
  if( modifierList.hasExplicitModifier( PsiModifier.PROTECTED ) )
  {
    modifiers |= Modifier.PROTECTED;
  }
  if( modifierList.hasExplicitModifier( PsiModifier.PUBLIC ) )
  {
    modifiers |= Modifier.PUBLIC;
  }
  if( modifierList.hasExplicitModifier( PsiModifier.STATIC ) )
  {
    modifiers |= Modifier.STATIC;
  }
  if( modifierList.hasExplicitModifier( PsiModifier.SYNCHRONIZED ) )
  {
    modifiers |= Modifier.SYNCHRONIZED;
  }
  if( modifierList.hasExplicitModifier( PsiModifier.TRANSIENT ) )
  {
    modifiers |= Modifier.TRANSIENT;
  }
  if( modifierList.hasExplicitModifier( PsiModifier.VOLATILE ) )
  {
    modifiers |= Modifier.VOLATILE;
  }
  return modifiers;
}
 

public static long modifiersFrom( Set<javax.lang.model.element.Modifier> modifiers )
{
  long mods = 0;
  for( javax.lang.model.element.Modifier mod : modifiers )
  {
    switch( mod )
    {
      case PUBLIC:
        mods |= Modifier.PUBLIC;
        break;
      case PROTECTED:
        mods |= Modifier.PROTECTED;
        break;
      case PRIVATE:
        mods |= Modifier.PRIVATE;
        break;
      case ABSTRACT:
        mods |= Modifier.ABSTRACT;
        break;
      case DEFAULT:
        mods |= Flags.DEFAULT;
        break;
      case STATIC:
        mods |= Modifier.STATIC;
        break;
      case FINAL:
        mods |= Modifier.FINAL;
        break;
      case TRANSIENT:
        mods |= Modifier.TRANSIENT;
        break;
      case VOLATILE:
        mods |= Modifier.VOLATILE;
        break;
      case SYNCHRONIZED:
        mods |= Modifier.SYNCHRONIZED;
        break;
      case NATIVE:
        mods |= Modifier.NATIVE;
        break;
      case STRICTFP:
        mods |= Flags.STRICTFP;
        break;
    }
  }
  return mods;
}
 

protected String renderModifiers( StringBuilder sb, long modifiers, boolean isDefault, int defModifier )
{
  if( isDefault )
  {
    sb.append( "default " );
  }

  if( (modifiers & Modifier.PUBLIC) != 0 )
  {
    sb.append( "public " );
  }
  else if( (modifiers & Modifier.PROTECTED) != 0 )
  {
    sb.append( "protected " );
  }
  else if( (modifiers & Modifier.PRIVATE) != 0 )
  {
    sb.append( "private " );
  }
  else if( defModifier != 0 )
  {
    renderModifiers( sb, defModifier, false, 0 );
  }

  // Canonical order
  if( (modifiers & Modifier.ABSTRACT) != 0 )
  {
    sb.append( "abstract " );
  }
  if( (modifiers & Modifier.STATIC) != 0 )
  {
    sb.append( "static " );
  }
  if( (modifiers & Modifier.FINAL) != 0 )
  {
    sb.append( "final " );
  }
  if( (modifiers & Modifier.TRANSIENT) != 0 )
  {
    sb.append( "transient " );
  }
  if( (modifiers & Modifier.VOLATILE) != 0 )
  {
    sb.append( "volatile " );
  }
  if( (modifiers & Modifier.SYNCHRONIZED) != 0 )
  {
    sb.append( "synchronized " );
  }
  if( (modifiers & Modifier.INTERFACE) != 0 )
  {
    sb.append( "interface " );
  }

  return "";
}