uk.ac.ic.doc.automed.wrappers
Class AutoMedResult

java.lang.Object
  uk.ac.ic.doc.automed.wrappers.AutoMedResult

Direct Known Subclasses:

SQLResult, YattaQueryResult

public class AutoMedResult
extends java.lang.Object

Provides a representation of the data associated with a scheme in an AutoMed Schema. This is modelled as a set or list of tuples. There is the notion of a cursor that points a particular tuple in the result set, and methods are provided to move the cursor through the tuples.

Author:

Peter McBrien (pjm@doc.ic.ac.uk)

Constructor Summary

AutoMedResult(int nc)
Create a new AutoMedResult with a fixed size of tuple in the resultCache

Method Summary

boolean	absolute(int rowNo)
void	addAutoMedTuple(AutoMedTuple t) Assert that a certain row number exists in a result
int	getAttributeType(int attributeNumber) Returns the type of an attribute in the tuple that the cursor currently points at.
AutoMedTuple	getAutoMedTuple() Return the tuple which the cursor current points at.
AutoMedTuple	getAutoMedTuple(int i) Move the cursor and get the tuple that is at the point
boolean	next() Returns true if the cursor can be moved to a next row
boolean	previous() Returns true if the cursor can be moved back to a previous row
void	rewind()
java.lang.String	toString() Produce a string representation of the result set, where {} indicates a set of values, and [] a list of values
void	toString(java.lang.StringBuffer r) Produce a string representation of the result set in a StringBuffer.

Methods inherited from class java.lang.Object

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

Constructor Detail

AutoMedResult

public AutoMedResult(int nc)

Create a new AutoMedResult with a fixed size of tuple in the resultCache

Method Detail

addAutoMedTuple

public void addAutoMedTuple(AutoMedTuple t)

Assert that a certain row number exists in a result

getAutoMedTuple

public AutoMedTuple getAutoMedTuple()

Return the tuple which the cursor current points at.

getAutoMedTuple

public AutoMedTuple getAutoMedTuple(int i)

Move the cursor and get the tuple that is at the point

getAttributeType

public int getAttributeType(int attributeNumber)

Returns the type of an attribute in the tuple that the cursor currently points at. Note that for most datasources, such as SQL databases, this will always return the same result regardless of which tuple the cursor currently points at.

toString

public java.lang.String toString()

Produce a string representation of the result set, where {} indicates a set of values, and [] a list of values

Overrides:

toString in class java.lang.Object

toString

public void toString(java.lang.StringBuffer r)

Produce a string representation of the result set in a StringBuffer.

previous

public boolean previous()

Returns true if the cursor can be moved back to a previous row

next

public boolean next()

Returns true if the cursor can be moved to a next row

absolute

public boolean absolute(int rowNo)

rewind

public void rewind()