SQLOutputImpl (Java Platform SE 6)

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javax.sql.rowset.serial
class SQLOutputImpl

java.lang.Object
  javax.sql.rowset.serial.SQLOutputImpl

All Implemented Interfaces:: SQLOutput

public class SQLOutputImpl
extends Object
implements SQLOutput

The output stream for writing the attributes of a custom-mapped user-defined type (UDT) back to the database. The driver uses this interface internally, and its methods are never directly invoked by an application programmer.

When an application calls the method PreparedStatement.setObject, the driver checks to see whether the value to be written is a UDT with a custom mapping. If it is, there will be an entry in a type map containing the Class object for the class that implements SQLData for this UDT. If the value to be written is an instance of SQLData, the driver will create an instance of SQLOutputImpl and pass it to the method SQLData.writeSQL. The method writeSQL in turn calls the appropriate SQLOutputImpl.writeXXX methods to write data from the SQLData object to the SQLOutputImpl output stream as the representation of an SQL user-defined type.

Constructor Summary
`SQLOutputImpl(Vector attributes, Map map)` Creates a new `SQLOutputImpl` object initialized with the given vector of attributes and type map.

Method Summary
`void`	`writeArray(Array x)` Writes an `Array` object in the Java programming language to this `SQLOutputImpl` object.
`void`	`writeAsciiStream(InputStream x)` Writes a stream of ASCII characters to this `SQLOutputImpl` object.
`void`	`writeBigDecimal(BigDecimal x)` Writes a `java.math.BigDecimal` object in the Java programming language to this `SQLOutputImpl` object.
`void`	`writeBinaryStream(InputStream x)` Writes a stream of uninterpreted bytes to this `SQLOutputImpl` object.
`void`	`writeBlob(Blob x)` Writes a `Blob` object in the Java programming language to this `SQLOutputImpl` object.
`void`	`writeBoolean(boolean x)` Writes a `boolean` in the Java programming language to this `SQLOutputImpl` object.
`void`	`writeByte(byte x)` Writes a `byte` in the Java programming language to this `SQLOutputImpl` object.
`void`	`writeBytes(byte[] x)` Writes an array of `bytes` in the Java programming language to this `SQLOutputImpl` object.
`void`	`writeCharacterStream(Reader x)` Writes a stream of Unicode characters to this `SQLOutputImpl` object.
`void`	`writeClob(Clob x)` Writes a `Clob` object in the Java programming language to this `SQLOutputImpl` object.
`void`	`writeDate(Date x)` Writes a `java.sql.Date` object in the Java programming language to this `SQLOutputImpl` object.
`void`	`writeDouble(double x)` Writes a `double` in the Java programming language to this `SQLOutputImpl` object.
`void`	`writeFloat(float x)` Writes a `float` in the Java programming language to this `SQLOutputImpl` object.
`void`	`writeInt(int x)` Writes an `int` in the Java programming language to this `SQLOutputImpl` object.
`void`	`writeLong(long x)` Writes a `long` in the Java programming language to this `SQLOutputImpl` object.
`void`	`writeNClob(NClob x)` Writes an SQL `NCLOB` value to the stream.
`void`	`writeNString(String x)` Writes the next attribute to the stream as a `String` in the Java programming language.
`void`	`writeObject(SQLData x)` Writes to the stream the data contained in the given `SQLData` object.
`void`	`writeRef(Ref x)` Writes a `Ref` object in the Java programming language to this `SQLOutputImpl` object.
`void`	`writeRowId(RowId x)` Writes an SQL `ROWID` value to the stream.
`void`	`writeShort(short x)` Writes a `short` in the Java programming language to this `SQLOutputImpl` object.
`void`	`writeSQLXML(SQLXML x)` Writes an SQL `XML` value to the stream.
`void`	`writeString(String x)` Writes a `String` in the Java programming language to this `SQLOutputImpl` object.
`void`	`writeStruct(Struct x)` Writes a `Struct` object in the Java programming language to this `SQLOutputImpl` object.
`void`	`writeTime(Time x)` Writes a `java.sql.Time` object in the Java programming language to this `SQLOutputImpl` object.
`void`	`writeTimestamp(Timestamp x)` Writes a `java.sql.Timestamp` object in the Java programming language to this `SQLOutputImpl` object.
`void`	`writeURL(URL url)` Writes an `java.sql.Type.DATALINK` object in the Java programming language to this `SQLOutputImpl` object.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

SQLOutputImpl

public SQLOutputImpl(Vector attributes,
                     Map map)
              throws SQLException

Creates a new SQLOutputImpl object initialized with the given vector of attributes and type map. The driver will use the type map to determine which SQLData.writeSQL method to invoke. This method will then call the appropriate SQLOutputImpl writer methods in order and thereby write the attributes to the new output stream.

Parameters:: attributes - a Vector object containing the attributes of the UDT to be mapped to one or more objects in the Java programming language; map - a java.util.Map object containing zero or more entries, with each entry consisting of 1) a String giving the fully qualified name of a UDT and 2) the Class object for the SQLData implementation that defines how the UDT is to be mapped
Throws:: SQLException - if the attributes or the map is a null value

Method Detail

writeArray

public void writeArray(Array x)
                throws SQLException

Writes an Array object in the Java programming language to this SQLOutputImpl object. The driver converts this value to a serializable SerialArray SQL ARRAY value before returning it to the database.

Parameters:: x - an object representing an SQL ARRAY value
Throws:: SQLException - if the SQLOutputImpl object is in use by a SQLData object attempting to write the attribute values of a UDT to the database.

writeAsciiStream

public void writeAsciiStream(InputStream x)
                      throws SQLException

Writes a stream of ASCII characters to this SQLOutputImpl object. The driver will do any necessary conversion from ASCII to the database CHAR format.

Parameters:: x - the value to pass to the database
Throws:: SQLException - if the SQLOutputImpl object is in use by a SQLData object attempting to write the attribute values of a UDT to the database.

writeBigDecimal

public void writeBigDecimal(BigDecimal x)
                     throws SQLException

Writes a java.math.BigDecimal object in the Java programming language to this SQLOutputImpl object. The driver converts it to an SQL NUMERIC before returning it to the database.

Parameters:: x - the value to pass to the database
Throws:: SQLException - if the SQLOutputImpl object is in use by a SQLData object attempting to write the attribute values of a UDT to the database.

writeBinaryStream

public void writeBinaryStream(InputStream x)
                       throws SQLException

Writes a stream of uninterpreted bytes to this SQLOutputImpl object.

Parameters:: x - the value to pass to the database
Throws:: SQLException - if the SQLOutputImpl object is in use by a SQLData object attempting to write the attribute values of a UDT to the database.

writeBlob

public void writeBlob(Blob x)
               throws SQLException

Writes a Blob object in the Java programming language to this SQLOutputImpl object. The driver converts it to a serializable SerialBlob SQL BLOB value before returning it to the database.

Parameters:: x - an object representing an SQL BLOB value
Throws:: SQLException - if the SQLOutputImpl object is in use by a SQLData object attempting to write the attribute values of a UDT to the database.

writeBoolean

public void writeBoolean(boolean x)
                  throws SQLException

Writes a boolean in the Java programming language to this SQLOutputImpl object. The driver converts it to an SQL BIT before returning it to the database.

Parameters:: x - the value to pass to the database
Throws:: SQLException - if the SQLOutputImpl object is in use by a SQLData object attempting to write the attribute values of a UDT to the database.

writeByte

public void writeByte(byte x)
               throws SQLException

Writes a byte in the Java programming language to this SQLOutputImpl object. The driver converts it to an SQL BIT before returning it to the database.

Parameters:: x - the value to pass to the database
Throws:: SQLException - if the SQLOutputImpl object is in use by a SQLData object attempting to write the attribute values of a UDT to the database.

writeBytes

public void writeBytes(byte[] x)
                throws SQLException

Writes an array of bytes in the Java programming language to this SQLOutputImpl object. The driver converts it to an SQL VARBINARY or LONGVARBINARY before returning it to the database.

Parameters:: x - the value to pass to the database
Throws:: SQLException - if the SQLOutputImpl object is in use by a SQLData object attempting to write the attribute values of a UDT to the database.

writeCharacterStream

public void writeCharacterStream(Reader x)
                          throws SQLException

Writes a stream of Unicode characters to this SQLOutputImpl object. The driver will do any necessary conversion from Unicode to the database CHAR format.

Parameters:: x - the value to pass to the database
Throws:: SQLException - if the SQLOutputImpl object is in use by a SQLData object attempting to write the attribute values of a UDT to the database.

writeClob

public void writeClob(Clob x)
               throws SQLException

Writes a Clob object in the Java programming language to this SQLOutputImpl object. The driver converts it to a serializable SerialClob SQL CLOB value before returning it to the database.

Parameters:: x - an object representing an SQL CLOB value
Throws:: SQLException - if the SQLOutputImpl object is in use by a SQLData object attempting to write the attribute values of a UDT to the database.

writeDate

public void writeDate(Date x)
               throws SQLException

Writes a java.sql.Date object in the Java programming language to this SQLOutputImpl object. The driver converts it to an SQL DATE before returning it to the database.

Parameters:: x - the value to pass to the database
Throws:: SQLException - if the SQLOutputImpl object is in use by a SQLData object attempting to write the attribute values of a UDT to the database.

writeDouble

public void writeDouble(double x)
                 throws SQLException

Writes a double in the Java programming language to this SQLOutputImpl object. The driver converts it to an SQL DOUBLE before returning it to the database.

Parameters:: x - the value to pass to the database
Throws:: SQLException - if the SQLOutputImpl object is in use by a SQLData object attempting to write the attribute values of a UDT to the database.

writeFloat

public void writeFloat(float x)
                throws SQLException

Writes a float in the Java programming language to this SQLOutputImpl object. The driver converts it to an SQL REAL before returning it to the database.

Parameters:: x - the value to pass to the database
Throws:: SQLException - if the SQLOutputImpl object is in use by a SQLData object attempting to write the attribute values of a UDT to the database.

writeInt

public void writeInt(int x)
              throws SQLException

Writes an int in the Java programming language to this SQLOutputImpl object. The driver converts it to an SQL INTEGER before returning it to the database.

Parameters:: x - the value to pass to the database
Throws:: SQLException - if the SQLOutputImpl object is in use by a SQLData object attempting to write the attribute values of a UDT to the database.

writeLong

public void writeLong(long x)
               throws SQLException

Writes a long in the Java programming language to this SQLOutputImpl object. The driver converts it to an SQL BIGINT before returning it to the database.

Parameters:: x - the value to pass to the database
Throws:: SQLException - if the SQLOutputImpl object is in use by a SQLData object attempting to write the attribute values of a UDT to the database.

writeNClob

public void writeNClob(NClob x)
                throws SQLException

Writes an SQL NCLOB value to the stream.

Parameters:: x - a NClob object representing data of an SQL NCLOB value
Throws:: SQLException - if a database access error occurs

writeNString

public void writeNString(String x)
                  throws SQLException

Writes the next attribute to the stream as a String in the Java programming language. The driver converts this to a SQL NCHAR or NVARCHAR or LONGNVARCHAR value (depending on the argument's size relative to the driver's limits on NVARCHAR values) when it sends it to the stream.

Parameters:: x - the value to pass to the database
Throws:: SQLException - if a database access error occurs

writeObject

public void writeObject(SQLData x)
                 throws SQLException

Writes to the stream the data contained in the given SQLData object. When the SQLData object is null, this method writes an SQL NULL to the stream. Otherwise, it calls the SQLData.writeSQL method of the given object, which writes the object's attributes to the stream.

The implementation of the method SQLData.writeSQ calls the appropriate SQLOutputImpl.writeXXX method(s) for writing each of the object's attributes in order. The attributes must be read from an SQLInput input stream and written to an SQLOutputImpl output stream in the same order in which they were listed in the SQL definition of the user-defined type.

Parameters:: x - the object representing data of an SQL structured or distinct type
Throws:: SQLException - if the SQLOutputImpl object is in use by a SQLData object attempting to write the attribute values of a UDT to the database.

writeRef

public void writeRef(Ref x)
              throws SQLException

Writes a Ref object in the Java programming language to this SQLOutputImpl object. The driver converts it to a serializable SerialRef SQL REF value before returning it to the database.

Parameters:: x - an object representing an SQL REF value
Throws:: SQLException - if the SQLOutputImpl object is in use by a SQLData object attempting to write the attribute values of a UDT to the database.

writeRowId

public void writeRowId(RowId x)
                throws SQLException

Writes an SQL ROWID value to the stream.

Parameters:: x - a RowId object representing data of an SQL ROWID value
Throws:: SQLException - if a database access error occurs

writeShort

public void writeShort(short x)
                throws SQLException

Writes a short in the Java programming language to this SQLOutputImpl object. The driver converts it to an SQL SMALLINT before returning it to the database.

Parameters:: x - the value to pass to the database
Throws:: SQLException - if the SQLOutputImpl object is in use by a SQLData object attempting to write the attribute values of a UDT to the database.

writeSQLXML

public void writeSQLXML(SQLXML x)
                 throws SQLException

Writes an SQL XML value to the stream.

Parameters:: x - a SQLXML object representing data of an SQL XML value
Throws:: SQLException - if a database access error occurs

writeString

public void writeString(String x)
                 throws SQLException

Writes a String in the Java programming language to this SQLOutputImpl object. The driver converts it to an SQL CHAR, VARCHAR, or LONGVARCHAR before returning it to the database.

Parameters:: x - the value to pass to the database
Throws:: SQLException - if the SQLOutputImpl object is in use by a SQLData object attempting to write the attribute values of a UDT to the database.

writeStruct

public void writeStruct(Struct x)
                 throws SQLException

Writes a Struct object in the Java programming language to this SQLOutputImpl object. The driver converts this value to an SQL structured type before returning it to the database.

This method should be used when an SQL structured type has been mapped to a Struct object in the Java programming language (the standard mapping). The method writeObject should be used if an SQL structured type has been custom mapped to a class in the Java programming language.

Parameters:: x - an object representing the attributes of an SQL structured type
Throws:: SQLException - if the SQLOutputImpl object is in use by a SQLData object attempting to write the attribute values of a UDT to the database.

writeTime

public void writeTime(Time x)
               throws SQLException

Writes a java.sql.Time object in the Java programming language to this SQLOutputImpl object. The driver converts it to an SQL TIME before returning it to the database.

Parameters:: x - the value to pass to the database
Throws:: SQLException - if the SQLOutputImpl object is in use by a SQLData object attempting to write the attribute values of a UDT to the database.

writeTimestamp

public void writeTimestamp(Timestamp x)
                    throws SQLException

Writes a java.sql.Timestamp object in the Java programming language to this SQLOutputImpl object. The driver converts it to an SQL TIMESTAMP before returning it to the database.

Parameters:: x - the value to pass to the database
Throws:: SQLException - if the SQLOutputImpl object is in use by a SQLData object attempting to write the attribute values of a UDT to the database.

writeURL

public void writeURL(URL url)
              throws SQLException

Writes an java.sql.Type.DATALINK object in the Java programming language to this SQLOutputImpl object. The driver converts this value to a serializable SerialDatalink SQL DATALINK value before return it to the database.

Parameters:: url - an object representing a SQL DATALINK value
Throws:: SQLException - if the SQLOutputImpl object is in use by a SQLData object attempting to write the attribute values of a UDT to the database.