infovis.column
Class BasicEdgeColumn

java.lang.Object
  infovis.utils.ChangeManager
      infovis.column.AbstractColumn
          infovis.column.ColumnProxy
              infovis.column.BasicEdgeColumn

All Implemented Interfaces:

IntComparator, Column, Metadata, Constants, RowComparator, Serializable, EventListener, ChangeListener

public class BasicEdgeColumn
extends ColumnProxy

Column for graph edge table to access vertex attributes.

Version:

$Revision: 1.8 $

Author:

Jean-Daniel Fekete

See Also:

Serialized Form

Field Summary

Fields inherited from class infovis.column.AbstractColumn

MODIFIED_ALL, MODIFIED_NONE

Fields inherited from interface infovis.metadata.Constants

CONTRIBUTOR, COVERAGE, CREATOR, DATE, DESCRITION, FORMAT, IDENTIFIER, LANGUAGE, PUBLISHER, RELATION, RIGHTS, SOURCE, SUBJECT, TITLE, TYPE

Constructor Summary

BasicEdgeColumn(Graph graph, Column vertexColumn, boolean usingFirstVertex)
Create an edge column that returns the value of its related vertex column, either from its firstVertex or secondVertex.

Method Summary

int	firstValidRow() Returns the first valid row (not undefined) of this column.
String	getValueAt(int index) Returns the String representation of the element at the specified position in this column or null if the element is undefined. The representation is generated by the current format.
int	getVertex(int edge) Returns the considered vertex.
boolean	isUsingFirstVertex() Returns true if the first vertex is considere, false if the second vertex is considered.
boolean	isValueUndefined(int row) Returns true if the ith value is undefined.
RowIterator	iterator() Returns a RowIterator over all the valid rows of this column.
int	lastValidRow() Returns the last valid row (not undefined) of this column.
void	setUsingFirstVertex(boolean usingFirstVertex) Sets the vertex considered.
void	setValueAt(int index, String element) Replaces the element at the specified position in this column with the element specified in its String representation or sets if undefined if the element is null It will be read and translated using the Format. A null value sets the value to undefined. The column is extended if needed.
int	size() Returns the number of elements in this column.

Methods inherited from class infovis.column.ColumnProxy

addValue, addValueOrNull, capacity, clear, compare, dispose, ensureCapacity, getClientProperty, getFormat, getMaxIndex, getMetadata, getMinIndex, getName, getValueClass, hasUndefinedValue, isEmpty, isInternal, setFormat, setName, setSize, setValueOrNullAt, setValueUndefined, stateChanged

Methods inherited from class infovis.column.AbstractColumn

addChangeListener, compareValues, computeValueMap, computeValueMap, equalObj, equals, getLastModifiedRow, toString

Methods inherited from class infovis.utils.ChangeManager

disableNotify, enableNotify, getModCount, removeChangeListener

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface infovis.Column

disableNotify, enableNotify, removeChangeListener

Constructor Detail

BasicEdgeColumn

public BasicEdgeColumn(Graph graph,
                       Column vertexColumn,
                       boolean usingFirstVertex)

Create an edge column that returns the value of its related vertex column, either from its firstVertex or secondVertex.

Parameters:

graph - the graph

vertexColumn - the associated vertex column

usingFirstVertex - true if the firstVertex is used, false if the secondVertex is used.

See Also:

infovis.graph, infovis.graph

Method Detail

getVertex

public int getVertex(int edge)

Returns the considered vertex.

Parameters:

edge - the edge

Returns:

the considered vertex.

size

public int size()

Returns the number of elements in this column.

Specified by:

size in interface Column

Overrides:

size in class ColumnProxy

Returns:

the number of elements in this column.

isValueUndefined

public boolean isValueUndefined(int row)

Returns true if the ith value is undefined.

Specified by:

isValueUndefined in interface Column

Specified by:

isValueUndefined in interface RowComparator

Overrides:

isValueUndefined in class ColumnProxy

Parameters:

row - the index

Returns:

true if the ith value is undefined.

getValueAt

public String getValueAt(int index)

Returns the String representation of the element at the specified position in this column or null if the element is undefined. The representation is generated by the current format.

Specified by:

getValueAt in interface Column

Overrides:

getValueAt in class ColumnProxy

Parameters:

index - index of element representation to return.

Returns:

the String representation of element at the specified position in this column or null if the element is undefined.

setValueAt

public void setValueAt(int index,
                       String element)
                throws ParseException

Replaces the element at the specified position in this column with the element specified in its String representation or sets if undefined if the element is null It will be read and translated using the Format. A null value sets the value to undefined. The column is extended if needed.

Specified by:

setValueAt in interface Column

Overrides:

setValueAt in class ColumnProxy

Parameters:

index - index of element to replace.

element - element to be stored at the specified position.

Throws:

ParseException - if the specified string cannot be parsed.

firstValidRow

public int firstValidRow()

Returns the first valid row (not undefined) of this column.

Returns:

the first valid row of this column.

lastValidRow

public int lastValidRow()

Returns the last valid row (not undefined) of this column.

Returns:

the last valid row of this column.

iterator

public RowIterator iterator()

Returns a RowIterator over all the valid rows of this column.

Specified by:

iterator in interface Column

Overrides:

iterator in class ColumnProxy

Returns:

a RowIterator over all the valid rows of this column.

isUsingFirstVertex

public boolean isUsingFirstVertex()

Returns true if the first vertex is considere, false if the second vertex is considered.

Returns:

true if the first vertex is considere, false if the second vertex is considered.

setUsingFirstVertex

public void setUsingFirstVertex(boolean usingFirstVertex)

Sets the vertex considered.

Parameters:

usingFirstVertex - true is should use first vertex