我有两个相关的枚举.
Enum1：
public enum HttpMethodName
{
GET,POST,PUT,DELETE;
}
Enum2：
public enum ProtocolOperation {
CREATE(1),RETRIEVE(2),UPDATE(3),DELETE(4),NOTIFY(5);
private BigInteger operationId;
public BigInteger getOperationId() {
return operationId;
}
private ProtocolOperation(int operationId) {
this.operationId = BigInteger.valueOf(operationId);
}
}
枚举值的映射为：
Create--> POST Retrieve--> GET Update--> PUT Delete--> DELETE Notify---> POST
所以在值之间有一对一的映射,除了POST事件之外,它可以根据条件创建或通知两个值.
我正在考虑将映射保持为列表：
public enum HttpMethodName
{
POST(new List(ProtocolOperation.CREATE,ProtocolOperation.NOTIFY)),GET ( new List(ProtocolOperation.RETRIEVE) ),PUT (new List(ProtocolOperation.UPDATE),DELETE(new List(ProtocolOperation.DELETE) ;
List<ProtocolOperation > ops;
HttpMethodName (List<ProtocolOperation> ops)
{
this.ops = ops;
}
}
有更好的做法吗
编辑：
我将要从HttpMethodName< ---->映射两种方式ProtocolOperation
解决方法
你为什么发现目前的方法不能令人满意？
没有你的关注的知识,我只能建议删除样板：
import static ProtocolOperation.*;
public enum HttpMethodName {
GET(RETRIEVE),POST(CREATE,NOTIFY),PUT(UPDATE),DELETE(ProtocolOperation.DELETE);
final List<ProtocolOperation> ops;
HttpMethodName(ProtocolOperation... ops) {
this.ops = Collections.unmodifiableList(Arrays.asList(ops));
}
}
UPD：
如果要以两种方式进行映射,则首先将协议操作映射到HttpMethodName(因为不需要列表),并在MttpMethodName中创建一个简单的搜索方法是有意义的：
public enum ProtocolOperation {
CREATE(1,HttpMethodName.POST),RETRIEVE(2,HttpMethodName.GET),UPDATE(3,HttpMethodName.PUT),DELETE(4,HttpMethodName.DELETE),NOTIFY(5,HttpMethodName.POST);
private BigInteger operationId;
private HttpMethodName methodName;
public BigInteger getOperationId() {
return operationId;
}
public HttpMethodName getMethodName() {
return methodName;
}
private ProtocolOperation(int operationId,HttpMethodName httpMethodName) {
this.methodName = httpMethodName;
this.operationId = BigInteger.valueOf(operationId);
}
}
public enum HttpMethodName {
GET,DELETE;
List<ProtocolOperation> getProtocolOperations() {
List<ProtocolOperation> ops = new ArrayList<ProtocolOperation>(2);
for (ProtocolOperation op : ProtocolOperation.values()) {
if (op.getMethodName() == this) {
ops.add(op);
}
}
return ops;
}
}
由于您具有常量和少量的值,因此您不需要在HttpMethodName中创建最终的静态映射,以提供向后映射,线性搜索对于您的情况来说足够快.
