org.geotools.data.jdbc
Class WKTAttributeIO

java.lang.Object
  org.geotools.data.AbstractAttributeIO
      org.geotools.data.jdbc.WKTAttributeIO

All Implemented Interfaces:

AttributeReader, AttributeWriter, QueryDataListener

public class WKTAttributeIO

extends AbstractAttributeIO

implements QueryDataListener, AttributeWriter, AttributeReader

An attribute reader/writer for well known text. For now this just reads well known text in result sets, but if there are other cases of wkt that are not in databases we can rethink or adapt this class to them. Result sets should call AsText() when requesting the results, to put it into wkt.

Inserts will not work, should be overriden by the FeatureWriter using this, to make the sql call directly, since right now we can not get resultSet.updateString/Object to work on a geometry.

Version:

$Id: WKTAttributeIO.java,v 1.5 2003/11/24 00:19:32 cholmesny Exp $

Author:

Chris Holmes

Field Summary

Fields inherited from class org.geotools.data.AbstractAttributeIO

metaData

Constructor Summary

WKTAttributeIO(JDBCDataStore.QueryData queryData, AttributeType metadata, int columnIndex)

Method Summary

void	close() Release any resources associated with this reader
protected java.lang.String	formatValue(java.lang.Object value)
boolean	hasNext() Query whether there are other rows in the attribute writer.
void	next() Advance the AttributeWriter, all calls to write will correspond to the same set of attributes until next is called again.
void	queryDataClosed(JDBCDataStore.QueryData queryData)
java.lang.Object	read(int i) Read the attribute at the given index.
void	rowDeleted(JDBCDataStore.QueryData queryData)
void	write(int position, java.lang.Object attribute) Write the given attribute value at the position indicated.

Methods inherited from class org.geotools.data.AbstractAttributeIO

copy, getAttributeCount, getAttributeType

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.geotools.data.AttributeWriter

getAttributeCount, getAttributeType

Methods inherited from interface org.geotools.data.AttributeReader

getAttributeCount, getAttributeType

Constructor Detail

WKTAttributeIO

public WKTAttributeIO(JDBCDataStore.QueryData queryData,
                      AttributeType metadata,
                      int columnIndex)

Method Detail

close

public void close()
           throws java.io.IOException

Description copied from interface: AttributeReader

Release any resources associated with this reader

Specified by:

close in interface AttributeWriter

Throws:

java.io.IOException

hasNext

public boolean hasNext()
                throws java.io.IOException

Description copied from interface: AttributeWriter

Query whether there are other rows in the attribute writer.

Specified by:

hasNext in interface AttributeWriter

Returns:

Throws:

java.io.IOException

See Also:

FeatureWriter.hasNext()

next

public void next()
          throws java.io.IOException

Description copied from interface: AttributeWriter

Advance the AttributeWriter, all calls to write will correspond to the same set of attributes until next is called again.

Specified by:

next in interface AttributeWriter

Throws:

java.io.IOException

read

public java.lang.Object read(int i)
                      throws java.io.IOException,
                             java.lang.ArrayIndexOutOfBoundsException

Description copied from interface: AttributeReader

Read the attribute at the given index.

Specified by:

read in interface AttributeReader

Returns:

Object Attribute at given index

Throws:

java.io.IOException

java.lang.ArrayIndexOutOfBoundsException

write

public void write(int position,
                  java.lang.Object attribute)
           throws java.io.IOException

Description copied from interface: AttributeWriter

Write the given attribute value at the position indicated. Implementations can choose to immediately flush the write or buffer it.

Specified by:

write in interface AttributeWriter

Throws:

java.io.IOException

formatValue

protected java.lang.String formatValue(java.lang.Object value)

queryDataClosed

public void queryDataClosed(JDBCDataStore.QueryData queryData)

Specified by:

queryDataClosed in interface QueryDataListener

rowDeleted

public void rowDeleted(JDBCDataStore.QueryData queryData)

Specified by:

rowDeleted in interface QueryDataListener

Parameters:

queryData -

See Also:

QueryDataListener.rowDeleted(org.geotools.data.jdbc.JDBCDataStore.QueryData)