Class StringJavaType

java.lang.Object
org.hibernate.type.descriptor.java.AbstractClassJavaType<String>
org.hibernate.type.descriptor.java.StringJavaType
All Implemented Interfaces:
Serializable, BasicJavaType<String>, JavaType<String>
public class StringJavaType extends AbstractClassJavaType<String>
Descriptor for String handling.
See Also:

  • Field Details

  • Constructor Details

    • StringJavaType

      public StringJavaType()

  • Method Details

    • useObjectEqualsHashCode

      public boolean useObjectEqualsHashCode()
      Description copied from interface: JavaType
      Whether to use Object.equals(Object) and Object.hashCode() or JavaType.areEqual(Object, Object) and JavaType.extractHashCode(Object) for objects of this java type. This is useful to avoid mega-morphic callsites.

    • toString

      public String toString(String value)

    • fromString

      public String fromString(CharSequence string)

    • isInstance

      public boolean isInstance(Object value)
      Description copied from interface: JavaType
      Is the given value an instance of the described type?

      Usually just getJavaTypeClass().isInstance(value), but some descriptors need specialized semantics, for example, the descriptors for java.sql.Date, java.sql.Time, and java.sql.Timestamp.

      For EntityJavaType, this method handles proxies in a semantically correct way, by checking the entity instance underlying the proxy object.

    • cast

      public String cast(Object value)
      Description copied from interface: JavaType
      Apply a simple type cast to the given value, without attempting any sort of coercion or wrapping. This method is provided as a convenient way to avoid an unchecked cast to a type variable. Use javaType.cast(value) instead of (T) value wherever possible.

      Usually just getJavaTypeClass().cast(value), but overridden in some cases as an "optimization". This optimization is almost certainly unnecessary, and might even indeed be harmful, since Class.cast() is an intrinsic.

    • getRecommendedJdbcType

      public JdbcType getRecommendedJdbcType(JdbcTypeIndicators stdIndicators)
      Description copied from interface: BasicJavaType
      Obtain the "recommended" SQL type descriptor for this Java type. Often, but not always, the source of this recommendation is the JDBC specification.
      Parameters:
      stdIndicators - Contextual information
      Returns:
      The recommended SQL type descriptor

    • unwrap

      public <X> X unwrap(String value, Class<X> type, WrapperOptions options)
      Description copied from interface: JavaType
      Unwrap an instance of our handled Java type into the requested type.

      As an example, if this is a JavaType<Integer> and we are asked to unwrap the Integer value as a Long, we would return something like Long.valueOf( value.longValue() ).

      Intended use is during PreparedStatement binding.

      Type Parameters:
      X - The conversion type.
      Parameters:
      value - The value to unwrap
      type - The type as which to unwrap
      options - The options
      Returns:
      The unwrapped value.

    • wrap

      public <X> String wrap(X value, WrapperOptions options)
      Description copied from interface: JavaType
      Wrap a value as our handled Java type.

      Intended use is during ResultSet extraction.

      Type Parameters:
      X - The conversion type.
      Parameters:
      value - The value to wrap.
      options - The options
      Returns:
      The wrapped value.

    • isWider

      public boolean isWider(JavaType<?> javaType)
      Description copied from interface: JavaType
      Determines if this Java type is wider than the given Java type, that is, if the given type can be safely widened to this type.

    • coerce

      public String coerce(Object value)
      Description copied from interface: JavaType
      Coerce the given value to this type, if possible.

      This method differs from wrap() in that it allows simple, basic, implicit type conversions, and does not require WrapperOptions. The wrap() method may be thought of as offering explicitly requested type conversions driven by a choice of JdbcType.

      An implementation of this method reports failure in one of two ways, by:

      Therefore, this method is declared to return Object. In case immediate coercion is required, the following idiom may be used: 

      javaType.cast(javaType.coerce(value))
      Parameters:
      value - The value to coerce
      Returns:
      The coerced value, or the given value if no coercion was possible