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SQLOutputImpl (Java 2 Platform SE 5.0) - JDK 5 Documentation v1.5.0, Java 2 SDK 英文文档

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Standard Ed. 5.0
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javax.sql.rowset.serial
Class SQLOutputImpl

java.lang.Object
  extended by 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<String,?> 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 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 writeShort(short x)
          Writes a short in the Java programming language to this SQLOutputImpl object.
 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<String,?> 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

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.

Specified by:
writeString in interface SQLOutput
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.

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.

Specified by:
writeBoolean in interface SQLOutput
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.

Specified by:
writeByte in interface SQLOutput
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.

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.

Specified by:
writeShort in interface SQLOutput
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.

Specified by:
writeInt in interface SQLOutput
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.

Specified by:
writeLong in interface SQLOutput
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.

Specified by:
writeFloat in interface SQLOutput
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.

Specified by:
writeDouble in interface SQLOutput
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.

Specified by:
writeBigDecimal in interface SQLOutput
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.

Specified by:
writeBytes in interface SQLOutput
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.

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.

Specified by:
writeDate in interface SQLOutput
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.

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.

Specified by:
writeTime in interface SQLOutput
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.

Specified by:
writeTimestamp in interface SQLOutput
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.

Specified by:
writeCharacterStream in interface SQLOutput
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.

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.

Specified by:
writeAsciiStream in interface SQLOutput
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.

Specified by:
writeBinaryStream in interface SQLOutput
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.

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.

Specified by:
writeObject in interface SQLOutput
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.

Specified by:
writeRef in interface SQLOutput
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.

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.

Specified by:
writeBlob in interface SQLOutput
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.

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.

Specified by:
writeClob in interface SQLOutput
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.

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.

Specified by:
writeStruct in interface SQLOutput
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.

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.

Specified by:
writeArray in interface SQLOutput
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.

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.

Specified by:
writeURL in interface SQLOutput
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.
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Submit a bug or feature
For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Copyright 2004 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.