Refactor to remove abstraction

src/engine/db/handlers/dbContractHandler.java

@@ -16,9 +16,10 @@ import engine.objects.ItemBase;
 import engine.objects.MobEquipment;
 import org.pmw.tinylog.Logger;
 
+import java.sql.Connection;
+import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
-import java.util.ArrayList;
 
 public class dbContractHandler extends dbHandlerBase {
 
@@ -28,48 +29,37 @@ public class dbContractHandler extends dbHandlerBase {
 	}
 
 	public Contract GET_CONTRACT(final int objectUUID) {
+
 		Contract contract = (Contract) DbManager.getFromCache(Enum.GameObjectType.Contract, objectUUID);
+
 		if (contract != null)
 			return contract;
+
 		if (objectUUID == 0)
 			return null;
-		prepareCallable("SELECT * FROM `static_npc_contract` WHERE `ID` = ?");
-		setInt(1, objectUUID);
-		return (Contract) getObjectSingle(objectUUID);
-	}
 
-	public ArrayList<Contract> GET_CONTRACT_BY_RACE(final int objectUUID) {
+		try (Connection connection = DbManager.getConnection();
+			 PreparedStatement preparedStatement = connection.prepareStatement("SELECT `obj_building`.*, `object`.`parent` FROM `object` INNER JOIN `obj_building` ON `obj_building`.`UID` = `object`.`UID` WHERE `object`.`UID` = ?;")) {
 
-		ArrayList<Contract> contracts = new ArrayList<>();
+			preparedStatement.setInt(1, objectUUID);
 
-		prepareCallable("SELECT * FROM static_npc_contract WHERE `mobbaseID` =?;");
-		setLong(1, objectUUID);
-
-		try {
-			ResultSet rs = executeQuery();
-
-			//shrines cached in rs for easy cache on creation.
-			while (rs.next()) {
-				Contract contract = new Contract(rs);
-				if (contract != null)
-					contracts.add(contract);
-			}
+			ResultSet rs = preparedStatement.executeQuery();
+			contract = (Contract) getObjectFromRs(rs);
 
 		} catch (SQLException e) {
-			Logger.error( e.getErrorCode() + ' ' + e.getMessage(), e);
-		} finally {
-			closeCallable();
+			Logger.error(e);
 		}
-		return contracts;
+		return contract;
 	}
 
-	public void GET_GENERIC_INVENTORY(final Contract contract) {
+	public void LOAD_CONTRACT_INVENTORY(final Contract contract) {
 
-		prepareCallable("SELECT * FROM `static_npc_inventoryset` WHERE `inventorySet` = ?;");
-		setInt(1, contract.inventorySet);
+		try (Connection connection = DbManager.getConnection();
+			 PreparedStatement preparedStatement = connection.prepareStatement("SELECT * FROM `static_npc_inventoryset` WHERE `inventorySet` = ?;")) {
 
-		try {
-			ResultSet rs = executeQuery();
+			preparedStatement.setInt(1, contract.inventorySet);
+
+			ResultSet rs = preparedStatement.executeQuery();
 
 			while (rs.next()) {
 
@@ -102,56 +92,78 @@ public class dbContractHandler extends dbHandlerBase {
 				}
 			}
 		} catch (SQLException e) {
-			Logger.error("SQL Error number: " + e.getErrorCode() + ' ' + e.getMessage());
-		} finally {
-			closeCallable();
+			Logger.error(e);
 		}
 	}
 
-	public void GET_SELL_LISTS(final Contract con) {
-		prepareCallable("SELECT * FROM `static_npc_contract_selltype` WHERE `contractID` = ?;");
-		setInt(1, con.getObjectUUID());
-		try {
-			ResultSet rs = executeQuery();
-			ArrayList<Integer> item = con.getBuyItemType();
-			ArrayList<Integer> skill = con.getBuySkillToken();
-			ArrayList<Integer> unknown = con.getBuyUnknownToken();
+	public void LOAD_SELL_LIST_FOR_CONTRACT(final Contract contract) {
+
+		try (Connection connection = DbManager.getConnection();
+			 PreparedStatement preparedStatement = connection.prepareStatement("SELECT * FROM `static_npc_contract_selltype` WHERE `contractID` = ?;")) {
+
+			preparedStatement.setInt(1, contract.getObjectUUID());
+
+			ResultSet rs = preparedStatement.executeQuery();
+
 			while (rs.next()) {
+
 				int type = rs.getInt("type");
 				int value = rs.getInt("value");
-				if (type == 1) {
-					item.add(value);
-				} else if (type == 2) {
-					skill.add(value);
-				} else if (type == 3) {
-					unknown.add(value);
+
+				switch (type) {
+					case 1:
+						contract.getBuyItemType().add(value);
+						break;
+					case 2:
+						contract.getBuySkillToken().add(value);
+						break;
+					case 3:
+						contract.getBuyUnknownToken().add(value);
+						break;
 				}
 			}
 		} catch (SQLException e) {
-			Logger.error("SQL Error number: " + e.getErrorCode() + ' ' + e.getMessage());
-		} finally {
-			closeCallable();
+			Logger.error(e);
 		}
 	}
 
 	public boolean updateAllowedBuildings(final Contract con, final long slotbitvalue) {
-		prepareCallable("UPDATE `static_npc_contract` SET `allowedBuildingTypeID`=? WHERE `contractID`=?");
-		setLong(1, slotbitvalue);
-		setInt(2, con.getContractID());
-		return (executeUpdate() > 0);
+
+		try (Connection connection = DbManager.getConnection();
+			 PreparedStatement preparedStatement = connection.prepareStatement("UPDATE `static_npc_contract` SET `allowedBuildingTypeID`=? WHERE `contractID`=?")) {
+
+			preparedStatement.setLong(1, slotbitvalue);
+			preparedStatement.setInt(2, con.getContractID());
+
+			return (preparedStatement.executeUpdate() > 0);
+
+		} catch (SQLException e) {
+			Logger.error(e);
+			return false;
+		}
 	}
 
 	public boolean updateDatabase(final Contract con) {
-		prepareCallable("UPDATE `static_npc_contract` SET `contractID`=?, `name`=?, "
-				+ "`mobbaseID`=?, `classID`=?, vendorDialog=?, iconID=?, allowedBuildingTypeID=? WHERE `ID`=?");
-		setInt(1, con.getContractID());
-		setString(2, con.getName());
-		setInt(3, con.getMobbaseID());
-		setInt(4, con.getClassID());
-		setInt(5, (con.getVendorDialog() != null) ? con.getVendorDialog().getObjectUUID() : 0);
-		setInt(6, con.getIconID());
-		setInt(8, con.getObjectUUID());
-		setLong(7, con.getAllowedBuildings().toLong());
-		return (executeUpdate() > 0);
+
+		try (Connection connection = DbManager.getConnection();
+			 PreparedStatement preparedStatement = connection.prepareStatement("UPDATE `static_npc_contract` SET `contractID`=?, `name`=?, "
+					 + "`mobbaseID`=?, `classID`=?, vendorDialog=?, iconID=?, allowedBuildingTypeID=? WHERE `ID`=?")) {
+
+			preparedStatement.setInt(1, con.getContractID());
+			preparedStatement.setString(2, con.getName());
+			preparedStatement.setInt(3, con.getMobbaseID());
+			preparedStatement.setInt(4, con.getClassID());
+			preparedStatement.setInt(5, (con.getVendorDialog() != null) ? con.getVendorDialog().getObjectUUID() : 0);
+			preparedStatement.setInt(6, con.getIconID());
+			preparedStatement.setInt(8, con.getObjectUUID());
+			preparedStatement.setLong(7, con.getAllowedBuildings().toLong());
+
+			return (preparedStatement.executeUpdate() > 0);
+
+		} catch (SQLException e) {
+			Logger.error(e);
+			return false;
+		}
+
 	}
 }

src/engine/objects/Contract.java

@@ -138,8 +138,8 @@ public class Contract extends AbstractGameObject {
 
 	 //Specify if trainer, merchant, banker, etc via classID
 	 private void setBools() {
-		 DbManager.ContractQueries.GET_GENERIC_INVENTORY(this);
-		 DbManager.ContractQueries.GET_SELL_LISTS(this);
+		 DbManager.ContractQueries.LOAD_CONTRACT_INVENTORY(this);
+		 DbManager.ContractQueries.LOAD_SELL_LIST_FOR_CONTRACT(this);
 
 		 this.isTrainer = this.classID > 2499 && this.classID < 3050 || this.classID == 2028;