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Java Source Code / Java Documentation » Database JDBC Connection Pool » Database Utilities » org.apache.commons.dbutils.wrappers

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

org.apache.commons.dbutils.wrappers .SqlNullCheckedResultSet

SqlNullCheckedResultSet

public class SqlNullCheckedResultSet implements InvocationHandler(Code)

Decorates a ResultSet with checks for a SQL NULL value on each getXXX method. If a column value obtained by a getXXX method is not SQL NULL, the column value is returned. If the column value is SQL null, an alternate value is returned. The alternate value defaults to the Java null value, which can be overridden for instances of the class.

Usage example:

 Connection conn = // somehow get a connection
 Statement stmt = conn.createStatement();
 ResultSet rs = stmt.executeQuery("SELECT col1, col2 FROM table1");
 // Wrap the result set for SQL NULL checking
 SqlNullCheckedResultSet wrapper = new SqlNullCheckedResultSet(rs);
 wrapper.setNullString("---N/A---"); // Set null string
 wrapper.setNullInt(-999); // Set null integer
 rs = ProxyFactory.instance().createResultSet(wrapper);
 while (rs.next()) {
 // If col1 is SQL NULL, value returned will be "---N/A---"
 String col1 = rs.getString("col1");
 // If col2 is SQL NULL, value returned will be -999
 int col2 = rs.getInt("col2");
 }
 rs.close();

Constructor Summary
public	SqlNullCheckedResultSet(ResultSet rs) Constructs a new instance of `SqlNullCheckedResultSet` to wrap the specified `ResultSet`.

Method Summary
public InputStream	getNullAsciiStream() Returns the value when a SQL null is encountered as the result of invoking a `getAsciiStream` method.
public BigDecimal	getNullBigDecimal() Returns the value when a SQL null is encountered as the result of invoking a `getBigDecimal` method.
public InputStream	getNullBinaryStream() Returns the value when a SQL null is encountered as the result of invoking a `getBinaryStream` method.
public Blob	getNullBlob() Returns the value when a SQL null is encountered as the result of invoking a `getBlob` method.
public boolean	getNullBoolean() Returns the value when a SQL null is encountered as the result of invoking a `getBoolean` method.
public byte	getNullByte() Returns the value when a SQL null is encountered as the result of invoking a `getByte` method.
public byte[]	getNullBytes() Returns the value when a SQL null is encountered as the result of invoking a `getBytes` method.
public Reader	getNullCharacterStream() Returns the value when a SQL null is encountered as the result of invoking a `getCharacterStream` method.
public Clob	getNullClob() Returns the value when a SQL null is encountered as the result of invoking a `getClob` method.
public Date	getNullDate() Returns the value when a SQL null is encountered as the result of invoking a `getDate` method.
public double	getNullDouble() Returns the value when a SQL null is encountered as the result of invoking a `getDouble` method.
public float	getNullFloat() Returns the value when a SQL null is encountered as the result of invoking a `getFloat` method.
public int	getNullInt() Returns the value when a SQL null is encountered as the result of invoking a `getInt` method.
public long	getNullLong() Returns the value when a SQL null is encountered as the result of invoking a `getLong` method.
public Object	getNullObject() Returns the value when a SQL null is encountered as the result of invoking a `getObject` method.
public Ref	getNullRef() Returns the value when a SQL null is encountered as the result of invoking a `getRef` method.
public short	getNullShort() Returns the value when a SQL null is encountered as the result of invoking a `getShort` method.
public String	getNullString() Returns the value when a SQL null is encountered as the result of invoking a `getString` method.
public Time	getNullTime() Returns the value when a SQL null is encountered as the result of invoking a `getTime` method.
public Timestamp	getNullTimestamp() Returns the value when a SQL null is encountered as the result of invoking a `getTimestamp` method.
public URL	getNullURL() Returns the value when a SQL null is encountered as the result of invoking a `getURL` method.
public Object	invoke(Object proxy, Method method, Object[] args) Intercepts calls to `get` methods and calls the appropriate `getNull` method if the `ResultSet` returned `null`.
public void	setNullAsciiStream(InputStream nullAsciiStream) Sets the value to return when a SQL null is encountered as the result of invoking a `getAsciiStream` method.
public void	setNullBigDecimal(BigDecimal nullBigDecimal) Sets the value to return when a SQL null is encountered as the result of invoking a `getBigDecimal` method.
public void	setNullBinaryStream(InputStream nullBinaryStream) Sets the value to return when a SQL null is encountered as the result of invoking a `getBinaryStream` method.
public void	setNullBlob(Blob nullBlob) Sets the value to return when a SQL null is encountered as the result of invoking a `getBlob` method.
public void	setNullBoolean(boolean nullBoolean) Sets the value to return when a SQL null is encountered as the result of invoking a `getBoolean` method.
public void	setNullByte(byte nullByte) Sets the value to return when a SQL null is encountered as the result of invoking a `getByte` method.
public void	setNullBytes(byte[] nullBytes) Sets the value to return when a SQL null is encountered as the result of invoking a `getBytes` method.
public void	setNullCharacterStream(Reader nullCharacterStream) Sets the value to return when a SQL null is encountered as the result of invoking a `getCharacterStream` method.
public void	setNullClob(Clob nullClob) Sets the value to return when a SQL null is encountered as the result of invoking a `getClob` method.
public void	setNullDate(Date nullDate) Sets the value to return when a SQL null is encountered as the result of invoking a `getDate` method.
public void	setNullDouble(double nullDouble) Sets the value to return when a SQL null is encountered as the result of invoking a `getDouble` method.
public void	setNullFloat(float nullFloat) Sets the value to return when a SQL null is encountered as the result of invoking a `getFloat` method.
public void	setNullInt(int nullInt) Sets the value to return when a SQL null is encountered as the result of invoking a `getInt` method.
public void	setNullLong(long nullLong) Sets the value to return when a SQL null is encountered as the result of invoking a `getLong` method.
public void	setNullObject(Object nullObject) Sets the value to return when a SQL null is encountered as the result of invoking a `getObject` method.
public void	setNullRef(Ref nullRef) Sets the value to return when a SQL null is encountered as the result of invoking a `getRef` method.
public void	setNullShort(short nullShort) Sets the value to return when a SQL null is encountered as the result of invoking a `getShort` method.
public void	setNullString(String nullString) Sets the value to return when a SQL null is encountered as the result of invoking a `getString` method.
public void	setNullTime(Time nullTime) Sets the value to return when a SQL null is encountered as the result of invoking a `getTime` method.
public void	setNullTimestamp(Timestamp nullTimestamp) Sets the value to return when a SQL null is encountered as the result of invoking a `getTimestamp` method.
public void	setNullURL(URL nullURL) Sets the value to return when a SQL null is encountered as the result of invoking a `getURL` method.
public static ResultSet	wrap(ResultSet rs) Wraps the `ResultSet` in an instance of this class.

Constructor Detail

SqlNullCheckedResultSet
public SqlNullCheckedResultSet(ResultSet rs)(Code)
	Constructs a new instance of `SqlNullCheckedResultSet` to wrap the specified `ResultSet`. Parameters: rs - ResultSet to wrap

Method Detail

getNullAsciiStream
public InputStream getNullAsciiStream()(Code)
	Returns the value when a SQL null is encountered as the result of invoking a `getAsciiStream` method. the value

getNullBigDecimal
public BigDecimal getNullBigDecimal()(Code)
	Returns the value when a SQL null is encountered as the result of invoking a `getBigDecimal` method. the value

getNullBinaryStream
public InputStream getNullBinaryStream()(Code)
	Returns the value when a SQL null is encountered as the result of invoking a `getBinaryStream` method. the value

getNullBlob
public Blob getNullBlob()(Code)
	Returns the value when a SQL null is encountered as the result of invoking a `getBlob` method. the value

getNullBoolean
public boolean getNullBoolean()(Code)
	Returns the value when a SQL null is encountered as the result of invoking a `getBoolean` method. the value

getNullByte
public byte getNullByte()(Code)
	Returns the value when a SQL null is encountered as the result of invoking a `getByte` method. the value

getNullBytes
public byte[] getNullBytes()(Code)
	Returns the value when a SQL null is encountered as the result of invoking a `getBytes` method. the value

getNullCharacterStream
public Reader getNullCharacterStream()(Code)
	Returns the value when a SQL null is encountered as the result of invoking a `getCharacterStream` method. the value

getNullClob
public Clob getNullClob()(Code)
	Returns the value when a SQL null is encountered as the result of invoking a `getClob` method. the value

getNullDate
public Date getNullDate()(Code)
	Returns the value when a SQL null is encountered as the result of invoking a `getDate` method. the value

getNullDouble
public double getNullDouble()(Code)
	Returns the value when a SQL null is encountered as the result of invoking a `getDouble` method. the value

getNullFloat
public float getNullFloat()(Code)
	Returns the value when a SQL null is encountered as the result of invoking a `getFloat` method. the value

getNullInt
public int getNullInt()(Code)
	Returns the value when a SQL null is encountered as the result of invoking a `getInt` method. the value

getNullLong
public long getNullLong()(Code)
	Returns the value when a SQL null is encountered as the result of invoking a `getLong` method. the value

getNullObject
public Object getNullObject()(Code)
	Returns the value when a SQL null is encountered as the result of invoking a `getObject` method. the value

getNullRef
public Ref getNullRef()(Code)
	Returns the value when a SQL null is encountered as the result of invoking a `getRef` method. the value

getNullShort
public short getNullShort()(Code)
	Returns the value when a SQL null is encountered as the result of invoking a `getShort` method. the value

getNullString
public String getNullString()(Code)
	Returns the value when a SQL null is encountered as the result of invoking a `getString` method. the value

getNullTime
public Time getNullTime()(Code)
	Returns the value when a SQL null is encountered as the result of invoking a `getTime` method. the value

getNullTimestamp
public Timestamp getNullTimestamp()(Code)
	Returns the value when a SQL null is encountered as the result of invoking a `getTimestamp` method. the value

getNullURL
public URL getNullURL()(Code)
	Returns the value when a SQL null is encountered as the result of invoking a `getURL` method. the value

invoke
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable(Code)
	Intercepts calls to `get` methods and calls the appropriate `getNull` method if the `ResultSet` returned `null`. throws: Throwable - See Also: java.lang.reflect.InvocationHandler.invoke(java.lang.Objectjava.lang.reflect.Methodjava.lang.Object[])

setNullAsciiStream
public void setNullAsciiStream(InputStream nullAsciiStream)(Code)
	Sets the value to return when a SQL null is encountered as the result of invoking a `getAsciiStream` method. Parameters: nullAsciiStream - the value

setNullBigDecimal
public void setNullBigDecimal(BigDecimal nullBigDecimal)(Code)
	Sets the value to return when a SQL null is encountered as the result of invoking a `getBigDecimal` method. Parameters: nullBigDecimal - the value

setNullBinaryStream
public void setNullBinaryStream(InputStream nullBinaryStream)(Code)
	Sets the value to return when a SQL null is encountered as the result of invoking a `getBinaryStream` method. Parameters: nullBinaryStream - the value

setNullBlob
public void setNullBlob(Blob nullBlob)(Code)
	Sets the value to return when a SQL null is encountered as the result of invoking a `getBlob` method. Parameters: nullBlob - the value

setNullBoolean
public void setNullBoolean(boolean nullBoolean)(Code)
	Sets the value to return when a SQL null is encountered as the result of invoking a `getBoolean` method. Parameters: nullBoolean - the value

setNullByte
public void setNullByte(byte nullByte)(Code)
	Sets the value to return when a SQL null is encountered as the result of invoking a `getByte` method. Parameters: nullByte - the value

setNullBytes
public void setNullBytes(byte[] nullBytes)(Code)
	Sets the value to return when a SQL null is encountered as the result of invoking a `getBytes` method. Parameters: nullBytes - the value

setNullCharacterStream
public void setNullCharacterStream(Reader nullCharacterStream)(Code)
	Sets the value to return when a SQL null is encountered as the result of invoking a `getCharacterStream` method. Parameters: nullCharacterStream - the value

setNullClob
public void setNullClob(Clob nullClob)(Code)
	Sets the value to return when a SQL null is encountered as the result of invoking a `getClob` method. Parameters: nullClob - the value

setNullDate
public void setNullDate(Date nullDate)(Code)
	Sets the value to return when a SQL null is encountered as the result of invoking a `getDate` method. Parameters: nullDate - the value

setNullDouble
public void setNullDouble(double nullDouble)(Code)
	Sets the value to return when a SQL null is encountered as the result of invoking a `getDouble` method. Parameters: nullDouble - the value

setNullFloat
public void setNullFloat(float nullFloat)(Code)
	Sets the value to return when a SQL null is encountered as the result of invoking a `getFloat` method. Parameters: nullFloat - the value

setNullInt
public void setNullInt(int nullInt)(Code)
	Sets the value to return when a SQL null is encountered as the result of invoking a `getInt` method. Parameters: nullInt - the value

setNullLong
public void setNullLong(long nullLong)(Code)
	Sets the value to return when a SQL null is encountered as the result of invoking a `getLong` method. Parameters: nullLong - the value

setNullObject
public void setNullObject(Object nullObject)(Code)
	Sets the value to return when a SQL null is encountered as the result of invoking a `getObject` method. Parameters: nullObject - the value

setNullRef
public void setNullRef(Ref nullRef)(Code)
	Sets the value to return when a SQL null is encountered as the result of invoking a `getRef` method. Parameters: nullRef - the value

setNullShort
public void setNullShort(short nullShort)(Code)
	Sets the value to return when a SQL null is encountered as the result of invoking a `getShort` method. Parameters: nullShort - the value

setNullString
public void setNullString(String nullString)(Code)
	Sets the value to return when a SQL null is encountered as the result of invoking a `getString` method. Parameters: nullString - the value

setNullTime
public void setNullTime(Time nullTime)(Code)
	Sets the value to return when a SQL null is encountered as the result of invoking a `getTime` method. Parameters: nullTime - the value

setNullTimestamp
public void setNullTimestamp(Timestamp nullTimestamp)(Code)
	Sets the value to return when a SQL null is encountered as the result of invoking a `getTimestamp` method. Parameters: nullTimestamp - the value

setNullURL
public void setNullURL(URL nullURL)(Code)
	Sets the value to return when a SQL null is encountered as the result of invoking a `getURL` method. Parameters: nullURL - the value

wrap
public static ResultSet wrap(ResultSet rs)(Code)
	Wraps the `ResultSet` in an instance of this class. This is equivalent to: ProxyFactory.instance().createResultSet(new SqlNullCheckedResultSet(rs)); Parameters: rs - The `ResultSet` to wrap. wrapped ResultSet

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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