net.java.ao.types

Interface LogicalType<T>

public interface LogicalType<T>

Defines a logical type which can translate between one or more Java types and one or more JDBC types. This should be independent of the underlying database dialect.

Method Summary

Methods

Modifier and Type	Method and Description
int	getDefaultJdbcWriteType() Returns the default JDBC type to use when writing values to the database.
com.google.common.collect.ImmutableSet<Integer>	getJdbcReadTypes() Returns the set of JDBC types that can be translated into this logical type.
String	getName() Returns a descriptive name for this logical type.
com.google.common.collect.ImmutableSet<Class<?>>	getTypes() Returns the Java types that are handled by this logical type.
boolean	isAllowedAsPrimaryKey() Returns a boolean specifying if this type can be used as a primary key value.
T	parse(String input) Attempts to parse a string into a value of this logical type.
T	parseDefault(String input) Same as parse(String), but adds any necessary validation when the value is being used as a default value for a column.
T	pullFromDatabase(EntityManager manager, ResultSet res, Class<T> type, int columnIndex) Reads a value from a JDBC result set.
T	pullFromDatabase(EntityManager manager, ResultSet res, Class<T> type, String columnName) Reads a value from a JDBC result set.
void	putToDatabase(EntityManager manager, PreparedStatement stmt, int index, T value, int jdbcType) Sets a value in a JDBC statement.
boolean	shouldCache(Class<?> type) Deprecated. since 0.25. Entities and values now no longer cached.
boolean	shouldStore(Class<?> type) Returns whether the type may be put inside the entities value store.
Object	validate(Object value) Verifies that a value can be stored in the database.
boolean	valueEquals(Object val1, Object val2)
String	valueToString(T value)

Method Detail

getName

String getName()

Returns a descriptive name for this logical type.

getTypes

com.google.common.collect.ImmutableSet<Class<?>> getTypes()

Returns the Java types that are handled by this logical type. Only one logical type can handle any given Java type.

getJdbcReadTypes

com.google.common.collect.ImmutableSet<Integer> getJdbcReadTypes()

Returns the set of JDBC types that can be translated into this logical type.

getDefaultJdbcWriteType

int getDefaultJdbcWriteType()

Returns the default JDBC type to use when writing values to the database. This can be overridden by each database provider in the SchemaProperties.

isAllowedAsPrimaryKey

boolean isAllowedAsPrimaryKey()

Returns a boolean specifying if this type can be used as a primary key value.

Returns:

if it's allowed or not

parse

T parse(String input)
        throws IllegalArgumentException

Attempts to parse a string into a value of this logical type.

Throws:

IllegalArgumentException

parseDefault

T parseDefault(String input)
               throws IllegalArgumentException

Same as parse(String), but adds any necessary validation when the value is being used as a default value for a column.

Throws:

IllegalArgumentException

validate

Object validate(Object value)
                throws IllegalArgumentException

Verifies that a value can be stored in the database. Returns the same value or a canonically equivalent value.

Throws:

IllegalArgumentException

putToDatabase

void putToDatabase(EntityManager manager,
                 PreparedStatement stmt,
                 int index,
                 T value,
                 int jdbcType)
                   throws SQLException

Sets a value in a JDBC statement.

Throws:

SQLException

pullFromDatabase

T pullFromDatabase(EntityManager manager,
                 ResultSet res,
                 Class<T> type,
                 String columnName)
                   throws SQLException

Reads a value from a JDBC result set.

Throws:

SQLException

pullFromDatabase

T pullFromDatabase(EntityManager manager,
                 ResultSet res,
                 Class<T> type,
                 int columnIndex)
                   throws SQLException

Reads a value from a JDBC result set.

Throws:

SQLException

shouldCache

boolean shouldCache(Class<?> type)

Deprecated. since 0.25. Entities and values now no longer cached.

shouldStore

boolean shouldStore(Class<?> type)

Returns whether the type may be put inside the entities value store.

valueEquals

boolean valueEquals(Object val1,
                  Object val2)

valueToString

String valueToString(T value)