standup.joke
Class InstantiationConstraintNovelty

java.lang.Object
  standup.joke.InstantiationConstraintNovelty

All Implemented Interfaces:

InstantiationConstraint, JokeConstraint

public class InstantiationConstraintNovelty
extends Object
implements InstantiationConstraint

An InstantiationConstraint that constrains the Backend to only generate/retrieve a joke that does not appear in the current user's generated joke log.

Author:

Ruli Manurung

Field Summary

private JokeSet

generatedJokeLog

Constructor Summary

InstantiationConstraintNovelty(JokeSet generatedJokeLog)

Method Summary

String	getSQLConstraint(Clause clause, List<SQLSelectElement> taqlsses) Returns an SQL code snippet that is to be appended to the WHERE clause of the SQL query when instantiating the given Clause.
void	handleSchema(SQLQuerySchema schemaSQLQuery) Modifies the given SQLQuerySchema to reflect this constraint.
boolean	validate(JokeStructure j) Returns true if the given JokeStructure satisfies this constraint, and false if not.

Methods inherited from class java.lang.Object

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

Field Detail

generatedJokeLog

private JokeSet generatedJokeLog

Constructor Detail

InstantiationConstraintNovelty

public InstantiationConstraintNovelty(JokeSet generatedJokeLog)

Method Detail

handleSchema

public void handleSchema(SQLQuerySchema schemaSQLQuery)

Description copied from interface: InstantiationConstraint

Modifies the given SQLQuerySchema to reflect this constraint.

Specified by:

handleSchema in interface InstantiationConstraint

getSQLConstraint

public String getSQLConstraint(Clause clause,
                               List<SQLSelectElement> taqlsses)

Description copied from interface: InstantiationConstraint

Returns an SQL code snippet that is to be appended to the WHERE clause of the SQL query when instantiating the given Clause.

Specified by:

getSQLConstraint in interface InstantiationConstraint

Parameters:

clause - the Clause being instantiated.

Returns:

-- the String to be appended to the WHERE clause. As a contract, we require that it appear between parentheses, e.g. "(...)" for readability purposes.

validate

public boolean validate(JokeStructure j)

Description copied from interface: JokeConstraint

Returns true if the given JokeStructure satisfies this constraint, and false if not.

Specified by:

validate in interface JokeConstraint

Parameters:

j - the JokeStructure being validated

Returns:

-- true if j satisfies this constraint, false otherwise.