我正在尝试使用来自versant的sharpen converter将未绑定的id ldap java sdk源代码转换为c＃。但是，我得到一个与java枚举类有关的异常，它有几个构造函数，似乎与普通 .NET枚举不同。
错误消息如下：
ERROR: /sharpened/src/com/unboundid/asn1/ASN1Messages.java:240: Enum can contain
only fields and a private constructor.
java类如下所示：
enum ASN1Messages
{
/**
* ASN.1 Boolean elements must have a value whose length is exactly one byte.
*/
ERR_BOOLEAN_INVALID_LENGTH("ASN.1 Boolean elements must have a value whose length is exactly one byte."),
/**
* Unable to decode the provided byte array as an ASN.1 BER element: {0}
*/
ERR_ELEMENT_DECODE_EXCEPTION("Unable to decode the provided byte array as an ASN.1 BER element: {0}"),
这个课程中有问题的方法是：
/**
* Retrieves a localized version of the message.
* This method should only be used for messages which do not take any arguments.
*
* @return A localized version of the message.
*/
public String get()
{
String s = MESSAGE_STRINGS.get(this);
if (s == null)
{
使用锐化工具克服此问题的最佳方法是什么？
完整的类文件源代码如下：
/ * *版权所有2012 UnboundID Corp. * 版权所有。 / / *版权所有（C）2012 UnboundID Corp. * *此程序是免费软件;您可以重新分发和/或修改 *根据GNU通用公共许可证条款（仅限GPLv2） *或GNU宽通用公共许可证的条款（仅限LGPLv2.1） *由自由软件基金会发布。 * *该程序的分发是希望它有用， *但没有任何担保;甚至没有暗示的保证 *适销性或特定用途的适用性。见 * GNU通用公共许可证了解更多详情。 * *您应该已收到GNU通用公共许可证的副本 *以及该计划;如果没有，请参阅http://www.gnu.org/licenses。 * / 包com.unboundid.asn1;
import java.text.MessageFormat;
import java.util.ResourceBundle;
import java.util.concurrent.ConcurrentHashMap;
/**
* This enum defines a set of message keys for messages in the
* com.unboundid.asn1 package, which correspond to messages in the
* unboundid-ldapsdk-asn1.properties properties file.
* <BR><BR>
* This source file was generated from the properties file.
* Do not edit it directly.
*/
enum ASN1Messages
{
/**
* ASN.1 Boolean elements must have a value whose length is exactly one byte.
*/
ERR_BOOLEAN_INVALID_LENGTH("ASN.1 Boolean elements must have a value whose length is exactly one byte."),
/**
* Unable to decode the provided byte array as an ASN.1 BER element: {0}
*/
ERR_ELEMENT_DECODE_EXCEPTION("Unable to decode the provided byte array as an ASN.1 BER element: {0}"),
/**
* The decoded length of {0,number,0} does not match the number of bytes remaining in the provided array ({1,number,0}).
*/
ERR_ELEMENT_LENGTH_MISMATCH("The decoded length of {0,number,0} does not match the number of bytes remaining in the provided array ({1,number,0})."),
/**
* Invalid value length of {0,number,0} for an ASN.1 enumerated element. Enumerated element values must have a length between 1 and 4 bytes.
*/
ERR_ENUMERATED_INVALID_LENGTH("Invalid value length of {0,number,0} for an ASN.1 enumerated element. Enumerated element values must have a length between 1 and 4 bytes."),
/**
* Invalid value length of {0,number,0} for an ASN.1 integer element. Integer element values must have a length between 1 and 4 bytes.
*/
ERR_INTEGER_INVALID_LENGTH("Invalid value length of {0,number,0} for an ASN.1 integer element. Integer element values must have a length between 1 and 4 bytes."),
/**
* Invalid value length of {0,number,0} for an ASN.1 long element. Long element values must have a length between 1 and 8 bytes.
*/
ERR_LONG_INVALID_LENGTH("Invalid value length of {0,number,0} for an ASN.1 long element. Long element values must have a length between 1 and 8 bytes."),
/**
* ASN.1 null elements must not have a value.
*/
ERR_NULL_HAS_VALUE("ASN.1 null elements must not have a value."),
/**
* The end of the input stream was reached before the first length byte could be read.
*/
ERR_READ_END_BEFORE_FIRST_LENGTH("The end of the input stream was reached before the first length byte could be read."),
/**
* The end of the input stream was reached before the full length could be read.
*/
ERR_READ_END_BEFORE_LENGTH_END("The end of the input stream was reached before the full length could be read."),
/**
* The end of the input stream was reached before the full value could be read.
*/
ERR_READ_END_BEFORE_VALUE_END("The end of the input stream was reached before the full value could be read."),
/**
* The element indicated that it required {0,number,0} bytes to hold the value, but this is larger than the maximum of {1,number,0} bytes that the client has been configured to accept.
*/
ERR_READ_LENGTH_EXCEEDS_MAX("The element indicated that it required {0,number,0} bytes to hold the value, but this is larger than the maximum of {1,number,0} bytes that the client has been configured to accept."),
/**
* The element indicated that it required {0,number,0} bytes to encode the multi-byte length, but multi-byte lengths must be encoded in 1 to 4 bytes.
*/
ERR_READ_LENGTH_TOO_LONG("The element indicated that it required {0,number,0} bytes to encode the multi-byte length, but multi-byte lengths must be encoded in 1 to 4 bytes."),
/**
* Unable to decode the provided byte array as a sequence: {0}
*/
ERR_SEQUENCE_BYTES_DECODE_EXCEPTION("Unable to decode the provided byte array as a sequence: {0}"),
/**
* Unable to decode the provided byte array as a sequence because the decoded length of an embedded element exceeds the number of bytes remaining.
*/
ERR_SEQUENCE_BYTES_DECODE_LENGTH_EXCEEDS_AVAILABLE("Unable to decode the provided byte array as a sequence because the decoded length of an embedded element exceeds the number of bytes remaining."),
/**
* Unable to decode the provided ASN.1 element {0} as a sequence: {1}
*/
ERR_SEQUENCE_DECODE_EXCEPTION("Unable to decode the provided ASN.1 element {0} as a sequence: {1}"),
/**
* Unable to decode the provided ASN.1 element {0} as a sequence because the decoded length of an embedded element exceeds the number of bytes remaining.
*/
ERR_SEQUENCE_DECODE_LENGTH_EXCEEDS_AVAILABLE("Unable to decode the provided ASN.1 element {0} as a sequence because the decoded length of an embedded element exceeds the number of bytes remaining."),
/**
* Unable to decode the provided byte array as a set: {0}
*/
ERR_SET_BYTES_DECODE_EXCEPTION("Unable to decode the provided byte array as a set: {0}"),
/**
* Unable to decode the provided byte array as a set because the decoded length of an embedded element exceeds the number of bytes remaining.
*/
ERR_SET_BYTES_DECODE_LENGTH_EXCEEDS_AVAILABLE("Unable to decode the provided byte array as a set because the decoded length of an embedded element exceeds the number of bytes remaining."),
/**
* Unable to decode the provided ASN.1 element {0} as a set: {1}
*/
ERR_SET_DECODE_EXCEPTION("Unable to decode the provided ASN.1 element {0} as a set: {1}"),
/**
* Unable to decode the provided ASN.1 element {0} as a set because the decoded length of an embedded element exceeds the number of bytes remaining.
*/
ERR_SET_DECODE_LENGTH_EXCEEDS_AVAILABLE("Unable to decode the provided ASN.1 element {0} as a set because the decoded length of an embedded element exceeds the number of bytes remaining."),
/**
* The ASN.1 stream reader has already read beyond the end of this sequence (expected sequence of length {0} to end at {1} bytes into the stream, but {2} bytes have already been read from the stream).
*/
ERR_STREAM_READER_SEQUENCE_READ_PAST_END("The ASN.1 stream reader has already read beyond the end of this sequence (expected sequence of length {0} to end at {1} bytes into the stream, but {2} bytes have already been read from the stream)."),
/**
* The ASN.1 stream reader has already read beyond the end of this set (expected set of length {0} to end at {1} bytes into the stream, but {2} bytes have already been read from the stream).
*/
ERR_STREAM_READER_SET_READ_PAST_END("The ASN.1 stream reader has already read beyond the end of this set (expected set of length {0} to end at {1} bytes into the stream, but {2} bytes have already been read from the stream).");
/**
* The resource bundle that will be used to load the properties file.
*/
private static final ResourceBundle RESOURCE_BUNDLE;
static
{
ResourceBundle rb = null;
try
{
rb = ResourceBundle.getBundle("unboundid-ldapsdk-asn1");
} catch (Exception e) {}
RESOURCE_BUNDLE = rb;
}
/**
* The map that will be used to hold the unformatted message strings, indexed by property name.
*/
private static final ConcurrentHashMap<ASN1Messages,String> MESSAGE_STRINGS = new ConcurrentHashMap<ASN1Messages,String>();
/**
* The map that will be used to hold the message format objects, indexed by property name.
*/
private static final ConcurrentHashMap<ASN1Messages,MessageFormat> MESSAGES = new ConcurrentHashMap<ASN1Messages,MessageFormat>();
// The default text for this message
private final String defaultText;
/**
* Creates a new message key.
*/
private ASN1Messages(final String defaultText)
{
this.defaultText = defaultText;
}
/**
* Retrieves a localized version of the message.
* This method should only be used for messages which do not take any arguments.
*
* @return A localized version of the message.
*/
public String get()
{
String s = MESSAGE_STRINGS.get(this);
if (s == null)
{
if (RESOURCE_BUNDLE == null)
{
return defaultText;
}
else
{
try
{
s = RESOURCE_BUNDLE.getString(name());
}
catch (final Exception e)
{
s = defaultText;
}
MESSAGE_STRINGS.putIfAbsent(this, s);
}
}
return s;
}
/**
* Retrieves a localized version of the message.
*
* @param args The arguments to use to format the message.
*
* @return A localized version of the message.
*/
public String get(final Object... args)
{
MessageFormat f = MESSAGES.get(this);
if (f == null)
{
if (RESOURCE_BUNDLE == null)
{
f = new MessageFormat(defaultText);
}
else
{
try
{
f = new MessageFormat(RESOURCE_BUNDLE.getString(name()));
}
catch (final Exception e)
{
f = new MessageFormat(defaultText);
}
}
MESSAGES.putIfAbsent(this, f);
}
synchronized (f)
{
return f.format(args);
}
}
/**
* Retrieves a string representation of this message key.
*
* @return A string representation of this message key.
*/
@Override()
public String toString()
{
return get();
}
}
答案 0 :(得分：2)
我想知道Sharpen是否支持这样的枚举实现。以下是源代码，根据我的理解，只要在枚举中找到公共方法，它就会抛出异常：
private boolean processEnumType(TypeDeclaration node) {
if (!isEnum(node)) {
return false;
}
final CSEnum theEnum = new CSEnum(typeName(node));
mapVisibility(node, theEnum);
mapJavadoc(node, theEnum);
addType(theEnum);
node.accept(new ASTVisitor() {
public boolean visit(VariableDeclarationFragment node) {
theEnum.addValue(identifier(node.getName()));
return false;
}
@Override
public boolean visit(MethodDeclaration node) {
if (node.isConstructor() && isPrivate(node)) {
return false;
}
unsupportedConstruct(node, "Enum can contain only fields and a private constructor.");
return false;
}
});
return true;
}
但是，此链接http://tracker.db4o.com/browse/COR-496似乎确认这适用于公众获取者。也就是说，如果你尊重这种结构：
enum ASN1Messages {
/**
* ASN.1 Boolean elements must have a value whose length is exactly one byte.
*/
ERR_BOOLEAN_INVALID_LENGTH("ASN.1 Boolean elements must have a value whose length is exactly one byte."),
/**
* Unable to decode the provided byte array as an ASN.1 BER element: {0}
*/
ERR_ELEMENT_DECODE_EXCEPTION("Unable to decode the provided byte array as an ASN.1 BER element: {0}"),;
private String s;
ASN1Messages(String s) {
this.s = s;
}
/**
* Retrieves a localized version of the message.
* This method should only be used for messages which do not take any arguments.
*
* @return A localized version of the message.
*/
public String get() {
return s;
}
}
答案 1 :(得分：1)
根据你的枚举声明，你的枚举构造函数上有修饰符private。我认为这是无效的。请尝试使用此构造函数：
ASN1Messages(final String defaultText) {
this.defaultText = defaultText;
}
答案 2 :(得分：1)
似乎包含了get()个方法，用于输出与每个枚举值对应的String。
我在上面的代码上运行了Sharpen，但注释了get()和toString()方法。此转换成功，但与enum值关联的字符串未转移到C＃文件。
因此，如果可以通过合理的努力来实现，我建议将Java代码拆分为纯 enum文件而不使用关联的字符串，以及静态帮助程序类持有enum到 - String转化的地图并实施get功能。
如果重构的enum方法签名中包含get，
ASN1MessagesHelper.get(ASN1Messages mess)
在get()上调用enum的Java功能仍然可以通过修改获得的C＃代码来模仿：
ASN1MessagesHelper.Get(ASN1Messages mess)
=> ASN1MessagesHelper.Get(this ASN1Messages mess)