manifold.sql.rt.impl.accessors

Class DoubleValueAccessor

java.lang.Object

manifold.sql.rt.impl.accessors.DoubleValueAccessor

All Implemented Interfaces:

ValueAccessor

Direct Known Subclasses:

FloatValueAccessor

public class DoubleValueAccessor
extends java.lang.Object
implements ValueAccessor

Field Summary

Fields inherited from interface manifold.sql.rt.api.ValueAccessor

LOGGER

Constructor Summary

Constructors

Constructor and Description
DoubleValueAccessor()

Method Summary

Modifier and Type	Method and Description
java.lang.Class<?>	getJavaType(BaseElement elem) Provides the Java type to be used for JDBC columns and parameters in the Manifold SQL APIs.
int	getJdbcType() Indicates the JDBC type handled by this implementation.
java.lang.String	getParameterExpression(java.sql.DatabaseMetaData metaData, java.lang.Object value, ColumnInfo ci) Supply a parameter expression.
java.lang.Double	getRowValue(java.sql.ResultSet rs, BaseElement elem) Returns a query result value corresponding with an elem from result set, rs.
void	setParameter(java.sql.PreparedStatement ps, int pos, java.lang.Object value) Sets the query parameter value corresponding with pos.

Methods inherited from class java.lang.Object

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

Methods inherited from interface manifold.sql.rt.api.ValueAccessor

getClassForColumnClassName

Constructor Detail

DoubleValueAccessor

public DoubleValueAccessor()

Method Detail

getJdbcType

public int getJdbcType()

Description copied from interface: ValueAccessor

Indicates the JDBC type handled by this implementation.

Specified by:

getJdbcType in interface ValueAccessor

Returns:

The Types id this accessor handles. This type must be unique among other ValueAccessor instances returned from ValueAccessorProvider.get(int).

getJavaType

public java.lang.Class<?> getJavaType(BaseElement elem)

Description copied from interface: ValueAccessor

Provides the Java type to be used for JDBC columns and parameters in the Manifold SQL APIs.

Specified by:

getJavaType in interface ValueAccessor

Parameters:

elem - A schema column, query column, parameter, or other value bearing element.

Returns:

The Java type to use for elem in the Manifold SQL APIs.

getRowValue

public java.lang.Double getRowValue(java.sql.ResultSet rs,
                                    BaseElement elem)
                             throws java.sql.SQLException

Description copied from interface: ValueAccessor

Returns a query result value corresponding with an elem from result set, rs.

Specified by:

getRowValue in interface ValueAccessor

Parameters:

rs - The result set containing rows of column values

elem - The query column containing the value

Returns:

The value corresponding with elem. Note, the type of the value must match the Java type returned from elem.getJdbcType().

Throws:

java.sql.SQLException

getParameterExpression

public java.lang.String getParameterExpression(java.sql.DatabaseMetaData metaData,
                                               java.lang.Object value,
                                               ColumnInfo ci)

Description copied from interface: ValueAccessor

Supply a parameter expression. Normally, this is just ?, however some JDBC drivers and database systems require explicit casts when using certain data types. For instance, Postgres requires casts for several types e.g., Boolean to bit; there is no other way to get a value from Java into a Postgres bit column.

Specified by:

getParameterExpression in interface ValueAccessor

setParameter

public void setParameter(java.sql.PreparedStatement ps,
                         int pos,
                         java.lang.Object value)
                  throws java.sql.SQLException

Description copied from interface: ValueAccessor

Sets the query parameter value corresponding with pos.

Specified by:

setParameter in interface ValueAccessor

Parameters:

ps - The prepared statement containing the parameterized query.

pos - The index of the parameter, beginning with 1.

value - The value of the parameter

Throws:

java.sql.SQLException