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Java Source Code / Java Documentation » Rule Engine » Mandarax » org.mandarax.kernel

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Class Diagram

Java Document (Java Doc)

org.mandarax.kernel .ResultSet

All known Subclasses:   org.mandarax.util .CachedResultSet,  org.mandarax.util .ResultSetWrapper,
ResultSet
public interface ResultSet extends Serializable(Code)
Represents the result set of a query. A result set is very similar to an SQL result set: it provides a cursor for the results, and values from the current cursor position can be fetched.
See Also:   java.sql.ResultSet
author:
   Jens Dietrich
version:
   3.4 <7 March 05>
since:
   1.7

Method Summary
public boolean absolute(int resultNo)
     Moves the cursor to the given result number.
Parameters:
  resultNo - the number of results.
public void afterLast()
     Moves the cursor to the end of this ResultSet object, just after the last row.
public void beforeFirst()
     Moves the cursor to the front of this ResultSet object, just before the first row.
public void close()
     Releases this ResultSet resources.
public boolean first()
     Moves the cursor to the first row in this ResultSet object.
public int getCursorPosition()

public Derivation getProof()
     Get the derivation of the current result.
public List getQueryVariables()
     Get a list of all variable terms in the query.
public Object getResult(Class type, String name)
     Get the object that replaces the variable with the given name and type.
public Object getResult(VariableTerm term)
     Get the object that replaces the variable.
public int getResultNumber()
     Retrieves the current result number.
public Map getResults()
     Get the replacements as map (term -> term associations).
public boolean isAfterLast()
     Retrieves whether the cursor is after the last result in this ResultSet object.
public boolean isBeforeFirst()
     Retrieves whether the cursor is before the first row in this ResultSet object.
public boolean isFirst()
     Indicates whether the cursor is at the first position.
public boolean isLast()
     Indicates whether the cursor is at the last position.
public boolean last()
     Moves the cursor to the last row in this ResultSet object.
public boolean next()
     Moves the cursor down one row from its current position.
public boolean previous()
     Moves the cursor to the previous row in this ResultSet object.
public boolean relative(int offset)
     Moves the cursor a relative number of results, either positive or negative.

Method Detail
absolute
public boolean absolute(int resultNo) throws InferenceException(Code)
Moves the cursor to the given result number.
Parameters:
  resultNo - the number of results. true if the cursor is on the result set; false otherwise

afterLast
public void afterLast() throws InferenceException(Code)
Moves the cursor to the end of this ResultSet object, just after the last row. This method has no effect if the result set contains no rows.

beforeFirst
public void beforeFirst() throws InferenceException(Code)
Moves the cursor to the front of this ResultSet object, just before the first row. This method has no effect if the result set contains no rows.

close
public void close() throws InferenceException(Code)
Releases this ResultSet resources. E.g., database resources associated with SQLClauseSets can be released here.
exception:
  an - inference exception

first
public boolean first() throws InferenceException(Code)
Moves the cursor to the first row in this ResultSet object. true if the cursor is on a valid row; false if there are no rows in the result set
exception:
  an - inference exception

getCursorPosition
public int getCursorPosition() throws InferenceException(Code)
Get the current position of the cursor Should return -1 if next has never been called an integer

getProof
public Derivation getProof() throws InferenceException(Code)
Get the derivation of the current result. Throw an exception if the cursor is not positioned at a result. the proof (derivation)
exception:
  an - inference exception

getQueryVariables
public List getQueryVariables() throws InferenceException(Code)
Get a list of all variable terms in the query. a list of variable terms
exception:
  an - inference exception

getResult
public Object getResult(Class type, String name) throws InferenceException(Code)
Get the object that replaces the variable with the given name and type. Throw an exception if the cursor is not positioned at a result. the object that replaced the variable
Parameters:
  type - the type of the variable
Parameters:
  name - the name of the variable
exception:
  an - inference exception

getResult
public Object getResult(VariableTerm term) throws InferenceException(Code)
Get the object that replaces the variable. Throw an exception if the cursor is not positioned at a result. the object that replaced the variable
Parameters:
  term - the variable term that is (perhaps) replaced
exception:
  an - inference exception

getResultNumber
public int getResultNumber() throws InferenceException(Code)
Retrieves the current result number. The first row is number 1, the second number 2, and so on. a number
exception:
  an - inference exception

getResults
public Map getResults() throws InferenceException(Code)
Get the replacements as map (term -> term associations). a map

isAfterLast
public boolean isAfterLast() throws InferenceException(Code)
Retrieves whether the cursor is after the last result in this ResultSet object. true if the cursor is after the last result; false if the cursor is at any other position or the result set contains no results

isBeforeFirst
public boolean isBeforeFirst() throws InferenceException(Code)
Retrieves whether the cursor is before the first row in this ResultSet object. true if the cursor is before the first row; false if the cursor is at any other position or the result set contains no rows

isFirst
public boolean isFirst() throws InferenceException(Code)
Indicates whether the cursor is at the first position. a boolean

isLast
public boolean isLast() throws InferenceException(Code)
Indicates whether the cursor is at the last position. a boolean

last
public boolean last() throws InferenceException(Code)
Moves the cursor to the last row in this ResultSet object. true if the cursor is on a valid row; false if there are no rows in the result set
exception:
  an - inference exception

next
public boolean next() throws InferenceException(Code)
Moves the cursor down one row from its current position. A ResultSet cursor is initially positioned before the first row; the first call to the method next makes the first row the current row; the second call makes the second row the current row, and so on. true if the new current row is valid; false if there are no more rows
exception:
  an - inference exception

previous
public boolean previous() throws InferenceException(Code)
Moves the cursor to the previous row in this ResultSet object. true if the cursor is on a valid row; false if it is off the result set
exception:
  an - inference exception

relative
public boolean relative(int offset) throws InferenceException(Code)
Moves the cursor a relative number of results, either positive or negative.
Parameters:
  offset - the number of results true if the cursor is on the result set; false otherwise.

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