org.gcube.indexmanagement.geo
Class DataWrapper

java.lang.Object
  org.gcube.indexmanagement.geo.DataWrapper

public class DataWrapper
extends Object

A utility class used to read and administer the data, coordinates and id of a GeoIndex entry. *

Field Summary

static String	DEFAULT_CHARSET
static String	OFFSET_SEPARATOR

Method Summary

static org.geotools.index.DataDefinition	createDefinition() A method to generate the default GeoTools DataDefinition object.
String	getColID()
String	getColLang()
org.geotools.index.Data	getData() A getter method for the Data
String	getID() A getter method for the ID
static DataWrapper	getInstance(GeoIndexType indexTypeObject, org.geotools.index.Data data, RandomAccessFile rawDataFile) A method used to get a DataWrapper instance from a GeoTools Data object
static DataWrapper	getInstance(GeoIndexType indexTypeObject, ReadableByteChannel inChannel, RandomAccessFile rawDataFile) A method used to create a DataWrapper instance from an IndexType and a DeltaFile input channel
long	getMaxX() A getter method for the highest X coordinate
long	getMaxY() A getter method for the highest Y coordinate
com.vividsolutions.jts.geom.Envelope	getMbr() A method to get the Minimum Bounding Rectangle of the entry
long	getMinX() A getter method for the lowest X coordinate
long	getMinY() A getter method for the lowest Y coordinate
Object	getValue(String fieldName) A method to get the value of the IndexType field with the specified field name

Methods inherited from class java.lang.Object

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

Field Detail

OFFSET_SEPARATOR

public static final String OFFSET_SEPARATOR

See Also:

Constant Field Values

DEFAULT_CHARSET

public static final String DEFAULT_CHARSET

See Also:

Constant Field Values

Method Detail

getMinX

public long getMinX()

A getter method for the lowest X coordinate

Returns:

the lowest X coordinate of the entry

getMaxX

public long getMaxX()

A getter method for the highest X coordinate

Returns:

the highest X coordinate of the entry

getMinY

public long getMinY()

A getter method for the lowest Y coordinate

Returns:

the lowest Y coordinate of the entry

getMaxY

public long getMaxY()

A getter method for the highest Y coordinate

Returns:

the highest Y coordinate of the entry

getID

public String getID()

A getter method for the ID

Returns:

the ID of the entry

getData

public org.geotools.index.Data getData()

A getter method for the Data

Returns:

the data type of data

getMbr

public com.vividsolutions.jts.geom.Envelope getMbr()

A method to get the Minimum Bounding Rectangle of the entry

Returns:

the Minimum Bounding Rectangle of the entry

getValue

public Object getValue(String fieldName)

A method to get the value of the IndexType field with the specified field name

Parameters:

fieldName - - the fields index/placement in the IndexType

Returns:

the value of the field. NULL if the field isn't found.

getInstance

public static DataWrapper getInstance(GeoIndexType indexTypeObject,
                                      org.geotools.index.Data data,
                                      RandomAccessFile rawDataFile)
                               throws Exception

A method used to get a DataWrapper instance from a GeoTools Data object

Parameters:

indexTypeObject - - a GeoTools Data object containing the coordinates and id as the first five fields

data - - The data for the GeoTools data object.

Returns:

a DataWrapper representation of the Data object

Throws:

Exception

getInstance

public static DataWrapper getInstance(GeoIndexType indexTypeObject,
                                      ReadableByteChannel inChannel,
                                      RandomAccessFile rawDataFile)
                               throws IndexException

A method used to create a DataWrapper instance from an IndexType and a DeltaFile input channel

Parameters:

indexTypeObject - - The indexType of the entry

inChannel - - An input channel reading from a DeltaFile

Returns:

a DataWrapper representation of the next obect read from the DeltaFile. Null upon EOF.

Throws:

IndexException - an error reading from the DeltaFile

createDefinition

public static org.geotools.index.DataDefinition createDefinition()

A method to generate the default GeoTools DataDefinition object. The default definition contains the id, the 4 coordinates, and a String variable field for all the fields of a document(this makes possible the different structure of the fields for each document)

Returns:

a DataDefinition representation of the IndexType

getColID

public String getColID()

getColLang

public String getColLang()