de.mguennewig.pobjects.metadata
Class BlobType

java.lang.Object
  de.mguennewig.pobjects.metadata.AbstractType
      de.mguennewig.pobjects.metadata.ScalarType
          de.mguennewig.pobjects.metadata.BlobType

All Implemented Interfaces:

Type

Direct Known Subclasses:

ObjectType

public class BlobType
extends ScalarType

Binary Large Object Type.

Author:

Michael Günnewig

See Also:

Blob, PObjBlob

Field Summary

Fields inherited from interface de.mguennewig.pobjects.metadata.Type

CLASS_NAME, TYPE_NAME

Constructor Summary

BlobType()
Creates a new Blob type.

Method Summary

void	addMap(MapItem item) Adds a mapping to this type.
java.lang.String	formatNative(java.lang.Object value) Map value from its `native' string representation to its internal representation based on the type.
java.lang.Class<?>	getJavaClass() Returns the Java class instance that is being used for the values of this type.
int	getMaxFieldSize() Returns the maximum field size required to enter a value of this type.
java.lang.Object	getResult(JdbcContainer db, java.sql.ResultSet rs, int column) Reads the value for this type from the result set.
java.lang.Object	parseNative(java.lang.String value) Parse value according to the `native' string representation of this type.
void	setParam(JdbcContainer db, java.sql.PreparedStatement statm, int pos, java.lang.Object value) Sets the parameter(s) starting at startPos.

Methods inherited from class de.mguennewig.pobjects.metadata.ScalarType

checkConstraints, checkSyntax, expand, getMap, getResultInc, isScalar, labelToValue, valueToLabel

Methods inherited from class de.mguennewig.pobjects.metadata.AbstractType

format, getDescription, getTypeClass, name, parse, setDescription, setTypeClass

Methods inherited from class java.lang.Object

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

Constructor Detail

BlobType

public BlobType()

Creates a new Blob type.

Method Detail

addMap

public void addMap(MapItem item)

Adds a mapping to this type.

Specified by:

addMap in interface Type

Overrides:

addMap in class ScalarType

Throws:

java.lang.UnsupportedOperationException - always as the values of this type can't be mapped.

See Also:

Type.getJavaClass()

getJavaClass

public java.lang.Class<?> getJavaClass()

Returns the Java class instance that is being used for the values of this type.

getMaxFieldSize

public int getMaxFieldSize()

Returns the maximum field size required to enter a value of this type.

This is the maximum number of characters required to enter a string representation of all valid values of this type. The typical size of an input field may be much smaller.

Specified by:

getMaxFieldSize in interface Type

Overrides:

getMaxFieldSize in class ScalarType

Throws:

java.lang.UnsupportedOperationException - always, as a Blob can not be entered

formatNative

public java.lang.String formatNative(java.lang.Object value)

Map value from its `native' string representation to its internal representation based on the type.

This mapping is a one-to-one mapping of string values to the type's value set, without any translation based on MapItems associated with the type.

For example, an integer type's implementation would accept a value like `1' and translate it to the string `&dblquote;1&dblquote;', independent of any label associated with the value `1'.

The value null is always mapped to the empty string.

Specified by:

formatNative in interface Type

Overrides:

formatNative in class AbstractType

Throws:

java.lang.UnsupportedOperationException - always, as a Blob can't be formated

See Also:

Type.getJavaClass()

parseNative

public java.lang.Object parseNative(java.lang.String value)

Parse value according to the `native' string representation of this type.

This representation is a one-to-one mapping of the type's value set to strings, without any translation based on MapItems associated with the type.

For example, an integer type's implementation would accept a value like `"1"' and translate it to an integer object, but would reject a label like `"Yes"' that may be associated with the value `1'.

Throws:

java.lang.UnsupportedOperationException - always, as a string can't be parsed into a Blob

See Also:

Type.addMap(MapItem), Type.parse(String)

getResult

public java.lang.Object getResult(JdbcContainer db,
                                  java.sql.ResultSet rs,
                                  int column)

Reads the value for this type from the result set.

Specified by:

getResult in interface Type

Overrides:

getResult in class ScalarType

See Also:

Type.getResultInc()

setParam

public void setParam(JdbcContainer db,
                     java.sql.PreparedStatement statm,
                     int pos,
                     java.lang.Object value)
              throws java.sql.SQLException

Sets the parameter(s) starting at startPos.

This method is the counterpart to Type.getResult(JdbcContainer,ResultSet,int) and Type.getResultInc().

Throws:

java.sql.SQLException - if any database error occurs.