66资源网 如何为一些Java枚举添加通用方法
这样的Java枚举
public enum Aggregation
{
MORTGAGE( “Mortgage” ),
POOLS( “Pools” ),
PORTFOLIO( “Portfolio” );
private Aggregation( final String name )
{
m_Name = name;
}
private String m_Name;
static Map< String, Aggregation > c_LOOKUP =
new HashMap< String, Aggregation >();
static {
for (Aggregation agg:values()){
c_LOOKUP.put(agg.m_Name,agg);
}
}
public Aggregation lookup(String name){
return c_LOOKUP.get( name );
}
@Override
public String toString()
{
return m_Name;
}
}
public enum Interval
{
MONTHLY( “Monthly” ),
QUARTLY( “Quartly” ),
SEMIANNUALLY( “SemiAnnually” ),
ANNUALLY(“Annually”);
private Interval( final String name )
{
m_Name = name;
}
private String m_Name;
static Map< String, Interval > c_LOOKUP =
new HashMap< String, Interval >();
static {
for (Interval agg:values()){
c_LOOKUP.put(agg.m_Name,agg);
}
}
public Interval lookup(String name){
return c_LOOKUP.get( name );
}
@Override
public String toString()
{
return m_Name;
}
}
编辑：我已经制定出一个类似于ŁukaszBachman和missingfacktor的版本
static public enum Aggregation
{
MORTGAGE( “Mortgage” ),
POOLS( “Pools” ),
PORTFOLIO( “Portfolio” );
private final String m_Name;
final static private ReverseDictionary< Aggregation > c_DICTIONARY =
new ReverseDictionary< Aggregation >( Aggregation.class );
static public Aggregation lookup( final String name )
{
return c_DICTIONARY.lookup( name );
}
private Aggregation( final String name )
{
m_Name = name;
}
@Override
public String toString()
{
return m_Name;
}
}
static public enum Interval
{
MONTHLY( “Monthly” ),
QUARTLY( “Quartly” ),
SEMIANNUALLY( “SemiAnnually” ),
ANNUALLY( “Annually” );
private final String m_Name;
final static private ReverseDictionary< Interval > c_DICTIONARY =
new ReverseDictionary< Interval >( Interval.class );
static public Interval lookup( final String name )
{
return c_DICTIONARY.lookup( name );
}
private Interval( final String name )
{
m_Name = name;
}
@Override
public String toString()
{
return m_Name;
}
}
static public class ReverseDictionary< E extends Enum< E >>
{
Map< String, E > c_LOOKUP = new HashMap< String, E >();
public ReverseDictionary( final Class< E > enumClass )
{
for( final E agg : EnumSet.allOf( enumClass ) )
{
c_LOOKUP.put( agg.toString(), agg );
}
}
public E lookup( final String name )
{
return c_LOOKUP.get( name );
}
}
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66源码网 » 如何为一些Java枚举添加通用方法
