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Added showContract method 

Signed-off-by: Jim Martens <github@2martens.de>
This commit is contained in:
Jim Martens 2017-04-24 14:28:29 +02:00
parent e136cfec15
commit bd18b9f0c8
1 changed files with 99 additions and 0 deletions
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99
02/src/de/dis2017/data/db/ORM.java
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@ -18,6 +18,7 @@ public class ORM {
private Map<Integer, EstateAgent> _agents;
private Map<String, EstateAgent> _agentsUsername;
private Map<Integer, Estate> _estates;
private Map<Integer, Contract> _contracts;
/**
* Initializes the ORM.
@ -28,6 +29,7 @@ public class ORM {
_agents = new HashMap<>();
_agentsUsername = new HashMap<>();
_estates = new HashMap<>();
_contracts = new HashMap<>();
}
/**
@ -138,6 +140,103 @@ public class ORM {
return contracts;
}
/**
* Loads the contract with the given ID from database and returns the corresponding object.
*
* @param ID the id of the contract to load
* @return the Contract or null if there is no such object
*/
public Contract getContract(int ID) {
if (_contracts.containsKey(ID)) {
return _contracts.get(ID);
}
String selectSQLPurchase = "SELECT * FROM PURCHASECONTRACT " +
"LEFT JOIN CONTRACT ON PURCHASECONTRACT.CONTRACTNUMBER = CONTRACT.CONTRACTNUMBER " +
"LEFT JOIN SALES ON PURCHASECONTRACT.CONTRACTNUMBER = SALES.CONTRACTNUMBER " +
"WHERE PURCHASECONTRACT.CONTRACTNUMBER = ?";
String selectSQLTenancy = "SELECT * FROM TENANCYCONTRACT " +
"LEFT JOIN CONTRACT ON TENANCYCONTRACT.CONTRACTNUMBER = CONTRACT.CONTRACTNUMBER " +
"LEFT JOIN RENTALS ON TENANCYCONTRACT.CONTRACTNUMBER = RENTALS.CONTRACTNUMBER " +
"WHERE TENANCYCONTRACT.CONTRACTNUMBER = ?";
String countPurchase = "SELECT COUNT(contractNumber) AS count FROM PURCHASECONTRACT WHERE contractNumber = ?";
String countTenancy = "SELECT COUNT(contractNumber) AS count FROM TENANCYCONTRACT WHERE contractNumber = ?";
try {
// try purchase contract first
PreparedStatement preparedStatementCount = _connection.prepareStatement(countPurchase);
preparedStatementCount.setInt(1, ID);
ResultSet rs = preparedStatementCount.executeQuery();
rs.next();
int count = rs.getInt("count");
String type = "None";
if (count == 0) {
// try tenancy contract next
preparedStatementCount = _connection.prepareStatement(countTenancy);
preparedStatementCount.setInt(1, ID);
rs = preparedStatementCount.executeQuery();
rs.next();
count = rs.getInt("count");
if (count == 1) {
type = "TenancyContract";
}
}
else {
type = "PurchaseContract";
}
rs.close();
preparedStatementCount.close();
PreparedStatement pstmt;
Contract contract;
switch (type) {
case "PurchaseContract":
pstmt = _connection.prepareStatement(selectSQLPurchase);
pstmt.setInt(1, ID);
rs = pstmt.executeQuery();
contract = new PurchaseContract();
break;
case "TenancyContract":
pstmt = _connection.prepareStatement(selectSQLTenancy);
pstmt.setInt(1, ID);
rs = pstmt.executeQuery();
contract = new TenancyContract();
break;
default:
return null;
}
if (rs.next()) {
contract.setContractNo(ID);
contract.setPlace(rs.getString("place"));
contract.setDate(rs.getString("date"));
contract.setPerson(rs.getInt("person"));
if (contract instanceof PurchaseContract) {
((PurchaseContract) contract).setInterestRate(rs.getInt("interestRate"));
((PurchaseContract) contract).setNoOfInstallments(rs.getInt("numberOfInstallments"));
((PurchaseContract) contract).setHouse(rs.getInt("house"));
}
if (contract instanceof TenancyContract) {
((TenancyContract) contract).setStartDate(rs.getInt("startDate"));
((TenancyContract) contract).setDuration(rs.getInt("duration"));
((TenancyContract) contract).setAdditionalCost(rs.getInt("additionalCosts"));
((TenancyContract) contract).setApartment(rs.getInt("apartment"));
}
rs.close();
pstmt.close();
_contracts.put(ID, contract);
return contract;
}
} catch (SQLException e) {
e.printStackTrace();
}
return null;
}
/**
* Loads the estate with the given ID from database and returns the corresponding object.
*