TypeNames (Hibernate API Documentation) - Hibernate 3.2.4 正式版 API 英文文档

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org.hibernate.dialect
Class TypeNames

java.lang.Object
  org.hibernate.dialect.TypeNames

public class TypeNames
extends Object

This class maps a type to names. Associations may be marked with a capacity. Calling the get() method with a type and actual size n will return the associated name with smallest capacity >= n, if available and an unmarked default type otherwise. Eg, setting

	names.put(type,        "TEXT" );
	names.put(type,   255, "VARCHAR($l)" );
	names.put(type, 65534, "LONGVARCHAR($l)" );

will give you back the following:

  names.get(type)         // --> "TEXT" (default)
  names.get(type,    100) // --> "VARCHAR(100)" (100 is in [0:255])
  names.get(type,   1000) // --> "LONGVARCHAR(1000)" (1000 is in [256:65534])
  names.get(type, 100000) // --> "TEXT" (default)

On the other hand, simply putting

	names.put(type, "VARCHAR($l)" );

would result in

  names.get(type)        // --> "VARCHAR($l)" (will cause trouble)
  names.get(type, 100)   // --> "VARCHAR(100)"
  names.get(type, 10000) // --> "VARCHAR(10000)"

Author:: Christoph Beck

Constructor Summary

TypeNames()


Method Summary

String get(int typecode)
          get default type name for specified type

String get(int typecode, int size, int precision, int scale)
          get type name for specified type and size

void put(int typecode, int capacity, String value)
          set a type name for specified type key and capacity

void put(int typecode, String value)
          set a default type name for specified type key

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TypeNames

public TypeNames()

Method Detail

get

public String get(int typecode)
           throws MappingException

get default type name for specified type

Parameters:: typecode - the type key
Returns:: the default type name associated with specified key
Throws:: MappingException

get

public String get(int typecode,
                  int size,
                  int precision,
                  int scale)
           throws MappingException

get type name for specified type and size

Parameters:: typecode - the type key; size - the SQL length; scale - the SQL scale; precision - the SQL precision
Returns:: the associated name with smallest capacity >= size, if available and the default type name otherwise
Throws:: MappingException

put

public void put(int typecode,
                int capacity,
                String value)

set a type name for specified type key and capacity

Parameters:: typecode - the type key

put

public void put(int typecode,
                String value)

set a default type name for specified type key

Parameters:: typecode - the type key