package fr.pandacube.java.util.db2.sql_tools;

import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;

import fr.pandacube.java.util.Log;
import javafx.util.Pair;

public class SQLWhereNull extends SQLWhere {
	
	private SQLField<?> fild;
	private boolean nulll;
	
	/**
	 * Init a IS NULL / IS NOT NULL expression for a SQL WHERE condition.
	 * @param field the field to check null / not null state
	 * @param isNull true if we want to ckeck if "IS NULL", or false to check if "IS NOT NULL"
	 */
	public SQLWhereNull(SQLField<?> field, boolean isNull) {
		if (field == null)
			throw new IllegalArgumentException("field can't be null");
		if (!field.canBeNull)
			Log.getLogger().log(Level.WARNING, "Useless : Trying to check IS [NOT] NULL on the field "+field.getSQLElementType().getName()+"#"+field.name+" which is declared in the ORM as 'can't be null'");
		fild = field;
		nulll = isNull;
	}
	
	
	@Override
	public Pair<String, List<Object>> toSQL() {
		return new Pair<>(fild.name + " IS" + ((nulll)?" NULL":" NOT NULL"), new ArrayList<>());
	}
	
	
	
}