org.geotools.data

Interface AttributeReader

All Known Implementing Classes:

JoiningAttributeReader

public interface AttributeReader

The low-level attribute reading API. An AttributeReader is responsible for reading a finite set of attributes from an underlying storage format. It provides meta-data regarding the data it can provide, and an iterative, row-based approach for accessing the data.

Author:

Ian Schneider

See Also:

AttributeAcceptor

Method Summary

Modifier and Type	Method and Description
void	close() Release any resources associated with this reader
int	getAttributeCount() The number of attributes this reader can read, i.e the length of a row.
AttributeDescriptor	getAttributeType(int index) Retrieve the AttributeType at the given index.
boolean	hasNext() Does another set of attributes exist in this reader?
void	next() Advance the reader to the next set of attributes.
Object	read(int index) Read the attribute at the given index.

Method Detail

getAttributeCount

int getAttributeCount()

The number of attributes this reader can read, i.e the length of a row.

Returns:

Number of attribtues this reader can read

getAttributeType

AttributeDescriptor getAttributeType(int index)
                              throws ArrayIndexOutOfBoundsException

Retrieve the AttributeType at the given index.

Returns:

AttributeType at given index

Throws:

ArrayIndexOutOfBoundsException

close

void close()
    throws IOException

Release any resources associated with this reader

Throws:

IOException

hasNext

boolean hasNext()
         throws IOException

Does another set of attributes exist in this reader?

Returns:

true if additional content exists for AttributeReader

Throws:

IOException

next

void next()
   throws IOException

Advance the reader to the next set of attributes.

Throws:

IOException

read

Object read(int index)
     throws IOException,
            ArrayIndexOutOfBoundsException

Read the attribute at the given index.

Returns:

Object Attribute at given index

Throws:

IOException

ArrayIndexOutOfBoundsException