standup.joke
Class InstantiationConstraintLexeme

java.lang.Object
  standup.joke.InstantiationConstraintLexeme

All Implemented Interfaces:

InstantiationConstraint, JokeConstraint

Direct Known Subclasses:

InstantiationConstraintLexemeClause, InstantiationConstraintLexemeSchema

public class InstantiationConstraintLexeme
extends Object
implements InstantiationConstraint

An InstantiationConstraint that constrains a joke to make use of a specific Lexeme.

Currently, if used to actually generate a joke, it requires the Lexeme to appear in both the schema and clause instantiations! Use either InstantiationConstraintLexemeSchema or InstantiationConstraintLexemeClause instead.

It works as expected for validate(JokeStructure), though.

Author:

Ruli Manurung

Field Summary

(package private) Lexeme

lex The Lexeme required to appear in the joke.

Constructor Summary

InstantiationConstraintLexeme(Lexeme _lex)
Constructor is very simple -- just provide the Lexeme.

Method Summary

String	getSQLConstraint(Clause s, 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.
String	toString()
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, wait, wait, wait

Field Detail

lex

Lexeme lex

The Lexeme required to appear in the joke.

Constructor Detail

InstantiationConstraintLexeme

public InstantiationConstraintLexeme(Lexeme _lex)

Constructor is very simple -- just provide the Lexeme.

Parameters:

_lex -

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 s,
                               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:

s - 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.

toString

public String toString()

Overrides:

toString in class Object