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PhysDB.java
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PhysDB.java
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/**
* This file is part of LWC (https://github.com/Hidendra/LWC)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.griefcraft.sql;
import com.griefcraft.cache.LRUCache;
import com.griefcraft.lwc.LWC;
import com.griefcraft.model.AccessRight;
import com.griefcraft.model.History;
import com.griefcraft.model.LWCPlayer;
import com.griefcraft.model.Protection;
import com.griefcraft.modules.limits.LimitsModule;
import com.griefcraft.scripting.Module;
import com.griefcraft.util.Performance;
import org.bukkit.entity.Player;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.Timestamp;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
public class PhysDB extends Database {
public PhysDB() {
super();
}
public PhysDB(Type currentType) {
super(currentType);
}
@Override
protected void postPrepare() {
Performance.addPhysDBQuery();
}
/**
* Count the rights
*
* @param protectionId
* @return
*/
public int countRightsForProtection(int protectionId) {
return Integer.decode(fetch("SELECT COUNT(*) AS count FROM " + prefix + "rights WHERE chest=?", "count", protectionId) + "");
}
/**
* Fetch an object from the sql database
*
* @param sql
* @param column
* @return
*/
public Object fetch(String sql, String column, Object... toBind) {
try {
int index = 1;
PreparedStatement statement = prepare(sql);
for (Object bind : toBind) {
statement.setObject(index, bind);
index++;
}
ResultSet set = statement.executeQuery();
if (set.next()) {
Object object = set.getObject(column);
set.close();
return object;
}
set.close();
} catch (Exception e) {
printException(e);
}
return null;
}
/**
* Get the menu style for a player
*
* @param player
* @return
*/
public String getMenuStyle(String player) {
try {
PreparedStatement statement = prepare("SELECT menu FROM " + prefix + "menu_styles WHERE player = ?");
statement.setString(1, player);
ResultSet set = statement.executeQuery();
if (set.next()) {
String style = set.getString("menu");
set.close();
return style;
}
set.close();
} catch (Exception e) {
printException(e);
}
return LWC.getInstance().getConfiguration().getString("core.defaultMenuStyle");
}
/**
* Get the access level of a player to a chest -1 = no access 0 = normal access 1 = chest admin
*
* @param type
* @param protectionId
* @return the player's access level
*/
@Deprecated
public int getPrivateAccess(int type, int protectionId, String... entities) {
int access = -1;
try {
PreparedStatement statement = prepare("SELECT entity, rights FROM " + prefix + "rights WHERE type = ? AND chest = ?");
statement.setInt(1, type);
statement.setInt(2, protectionId);
ResultSet set = statement.executeQuery();
_main:
while (set.next()) {
String entity = set.getString("entity");
for (String str : entities) {
if (str.equalsIgnoreCase(entity)) {
access = set.getInt("rights");
break _main;
}
}
}
set.close();
} catch (SQLException e) {
printException(e);
}
return access;
}
/**
* @return the number of protected chests
*/
public int getProtectionCount() {
return Integer.decode(fetch("SELECT COUNT(*) AS count FROM " + prefix + "protections", "count").toString());
}
public int getHistoryCount() {
return Integer.decode(fetch("SELECT COUNT(*) AS count FROM " + prefix + "history", "count").toString());
}
/**
* Get the amount of protections a player has
*
* @param player
* @return the amount of protections they have
*/
public int getProtectionCount(String player) {
int amount = 0;
try {
PreparedStatement statement = prepare("SELECT id FROM " + prefix + "protections WHERE owner = ?");
statement.setString(1, player);
ResultSet set = statement.executeQuery();
while (set.next()) {
amount++;
}
set.close();
} catch (SQLException e) {
printException(e);
}
return amount;
}
/**
* Get the amount of chests a player has of a specific block id
*
* @param player
* @return the amount of protections they have of blockId
*/
public int getProtectionCount(String player, int blockId) {
int amount = 0;
try {
PreparedStatement statement = prepare("SELECT id FROM " + prefix + "protections WHERE owner = ? AND blockId = ?");
statement.setString(1, player);
statement.setInt(2, blockId);
ResultSet set = statement.executeQuery();
while (set.next()) {
amount++;
}
set.close();
} catch (SQLException e) {
printException(e);
}
return amount;
}
/**
* @return the number of limits
*/
public int getRightsCount() {
return Integer.decode(fetch("SELECT COUNT(*) AS count FROM " + prefix + "rights", "count") + "");
}
/**
* Create the table needed if it does not already exist
*/
@Override
public void load() {
if (loaded) {
return;
}
/**
* Updates that alter or rename a table go here
*/
doUpdate140();
doUpdate150();
doUpdate170();
doUpdate220();
doUpdate301();
doUpdate302();
doUpdate330();
doUpdate400_1();
try {
connection.setAutoCommit(false);
Column column;
Table protections = new Table(this, "protections");
{
column = new Column("id");
column.setType("INTEGER");
column.setPrimary(true);
protections.add(column);
column = new Column("owner");
column.setType("VARCHAR(255)");
protections.add(column);
column = new Column("type");
column.setType("INTEGER");
protections.add(column);
column = new Column("x");
column.setType("INTEGER");
protections.add(column);
column = new Column("y");
column.setType("INTEGER");
protections.add(column);
column = new Column("z");
column.setType("INTEGER");
protections.add(column);
column = new Column("flags");
column.setType("INTEGER");
protections.add(column);
column = new Column("rights");
column.setType("TEXT");
protections.add(column);
column = new Column("blockId");
column.setType("INTEGER");
protections.add(column);
column = new Column("world");
column.setType("VARCHAR(255)");
protections.add(column);
column = new Column("password");
column.setType("VARCHAR(255)");
protections.add(column);
column = new Column("date");
column.setType("VARCHAR(255)");
protections.add(column);
column = new Column("last_accessed");
column.setType("INTEGER");
protections.add(column);
}
Table rights = new Table(this, "rights");
{
column = new Column("id");
column.setType("INTEGER");
column.setPrimary(true);
rights.add(column);
column = new Column("chest");
column.setType("INTEGER");
rights.add(column);
column = new Column("entity");
column.setType("TEXT");
rights.add(column);
column = new Column("rights");
column.setType("INTEGER");
rights.add(column);
column = new Column("type");
column.setType("INTEGER");
rights.add(column);
}
Table menuStyles = new Table(this, "menu_styles");
{
column = new Column("player");
column.setType("VARCHAR(255)");
column.setPrimary(true);
column.setAutoIncrement(false);
menuStyles.add(column);
column = new Column("menu");
column.setType("VARCHAR(255)");
menuStyles.add(column);
}
Table history = new Table(this, "history");
{
column = new Column("id");
column.setType("INTEGER");
column.setPrimary(true);
history.add(column);
column = new Column("protectionId");
column.setType("INTEGER");
history.add(column);
column = new Column("player");
column.setType("VARCHAR(255)");
history.add(column);
column = new Column("type");
column.setType("INTEGER");
history.add(column);
column = new Column("status");
column.setType("INTEGER");
history.add(column);
column = new Column("metadata");
column.setType("VARCHAR(255)");
history.add(column);
column = new Column("timestamp");
column.setType("long");
history.add(column);
}
Table tasks = new Table(this, "tasks");
{
column = new Column("id");
column.setType("INTEGER");
column.setPrimary(true);
tasks.add(column);
column = new Column("type");
column.setType("INTEGER");
tasks.add(column);
column = new Column("data");
column.setType("VARCHAR(255)");
tasks.add(column);
}
protections.execute();
rights.execute();
menuStyles.execute();
history.execute();
connection.commit();
doIndexes();
} catch (SQLException e) {
printException(e);
}
try {
connection.setAutoCommit(true);
} catch (Exception e) {
printException(e);
}
doUpdate100();
loaded = true;
}
/**
* Get the rights for a protection id ranging from start-max
*
* @param protectionId
* @param start
* @param max
* @return
*/
public List<AccessRight> loadAccessRights(int protectionId, int start, int max) {
List<AccessRight> accessRights = new ArrayList<AccessRight>();
try {
PreparedStatement statement = prepare("SELECT * FROM " + prefix + "rights WHERE chest = ? ORDER BY rights DESC LIMIT ?,?");
statement.setInt(1, protectionId);
statement.setInt(2, start);
statement.setInt(3, max);
ResultSet set = statement.executeQuery();
while (set.next()) {
AccessRight accessRight = new AccessRight();
accessRight.setId(set.getInt("id"));
accessRight.setProtectionId(protectionId);
accessRight.setName(set.getString("entity"));
accessRight.setRights(set.getInt("rights"));
accessRight.setType(set.getInt("type"));
accessRights.add(accessRight);
}
set.close();
} catch (Exception e) {
printException(e);
}
return accessRights;
}
/**
* Load a protection with the given id
*
* @param protectionId
* @return the Chest object
*/
public Protection loadProtection(int protectionId) {
try {
PreparedStatement statement = prepare("SELECT " + prefix + "protections.id AS protectionId, " + prefix + "rights.id AS rightsId, " + prefix + "protections.type AS protectionType, " + prefix + "rights.type AS rightsType, x, y, z, flags, blockId, world, owner, password, date, entity, rights, last_accessed FROM " + prefix + "protections LEFT OUTER JOIN " + prefix + "rights ON " + prefix + "protections.id = " + prefix + "rights.chest WHERE " + prefix + "protections.id = ?");
statement.setInt(1, protectionId);
return resolveProtection(statement);
} catch (SQLException e) {
printException(e);
}
return null;
}
/**
* Load protections using a specific type
*
* @param type
* @return the Protection object
*/
public List<Protection> loadProtectionsUsingType(int type) {
try {
PreparedStatement statement = prepare("SELECT " + prefix + "protections.id AS protectionId, " + prefix + "rights.id AS rightsId, " + prefix + "protections.type AS protectionType, " + prefix + "rights.type AS rightsType, x, y, z, flags, blockId, world, owner, password, date, entity, rights, last_accessed FROM " + prefix + "protections LEFT OUTER JOIN " + prefix + "rights ON " + prefix + "protections.id = " + prefix + "rights.chest WHERE " + prefix + "protections.type = ?");
statement.setInt(1, type);
return resolveProtections(statement);
} catch (SQLException e) {
printException(e);
}
return new ArrayList<Protection>();
}
/**
* Resolve a protection without resolving its rights
*
* @param set
* @return
*/
public Protection resolveProtectionNoRights(ResultSet set) {
if (set == null) {
return null;
}
Protection protection = new Protection();
try {
int protectionId = set.getInt("protectionId");
int x = set.getInt("x");
int y = set.getInt("y");
int z = set.getInt("z");
int flags = set.getInt("flags");
int blockId = set.getInt("blockId");
int type = set.getInt("protectionType");
String world = set.getString("world");
String owner = set.getString("owner");
String password = set.getString("password");
String date = set.getString("date");
long lastAccessed = set.getLong("last_accessed");
protection.setId(protectionId);
protection.setX(x);
protection.setY(y);
protection.setZ(z);
protection.setFlags(flags);
protection.setBlockId(blockId);
protection.setType(type);
protection.setWorld(world);
protection.setOwner(owner);
protection.setData(password);
protection.setDate(date);
protection.setLastAccessed(lastAccessed);
} catch (SQLException e) {
printException(e);
}
return protection;
}
/**
* Resolve a list of n protections from a statement
*
* @param statement
* @return
*/
private List<Protection> resolveProtections(PreparedStatement statement) {
List<Protection> protections = new ArrayList<Protection>();
int lastId = -1;
ResultSet set = null;
Protection protection = null;
boolean init = true;
try {
set = statement.executeQuery();
while (set.next()) {
int protectionId = set.getInt("protectionId");
if (lastId != protectionId) {
// add the last found protection
if (protection != null) {
protections.add(protection);
}
lastId = protectionId;
init = true;
protection = new Protection();
}
// we only want to set the initial data first
if (init) {
int x = set.getInt("x");
int y = set.getInt("y");
int z = set.getInt("z");
int flags = set.getInt("flags");
int blockId = set.getInt("blockId");
int type = set.getInt("protectionType");
String world = set.getString("world");
String owner = set.getString("owner");
String password = set.getString("password");
String date = set.getString("date");
long lastAccessed = set.getLong("last_accessed");
protection.setId(protectionId);
protection.setX(x);
protection.setY(y);
protection.setZ(z);
protection.setFlags(flags);
protection.setBlockId(blockId);
protection.setType(type);
protection.setWorld(world);
protection.setOwner(owner);
protection.setData(password);
protection.setDate(date);
protection.setLastAccessed(lastAccessed);
init = false;
}
// check for oh so beautiful rights!
String entity = set.getString("entity");
// we have joined in some rights! Rev up those accessors!
if (entity != null) {
int rightsId = set.getInt("rightsId");
int rights = set.getInt("rights");
int type = set.getInt("rightsType");
AccessRight right = new AccessRight();
right.setId(rightsId);
right.setProtectionId(protectionId);
right.setName(entity);
right.setRights(rights);
right.setType(type);
protection.addAccessRight(right);
}
}
if (protection != null && !protections.contains(protection)) {
protections.add(protection);
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
if (set != null) {
try {
set.close();
} catch (SQLException e) {
}
}
}
return protections;
}
/**
* Resolve the first protection from a statement
*
* @param statement
* @return
*/
private Protection resolveProtection(PreparedStatement statement) {
List<Protection> protections = resolveProtections(statement);
if (protections.size() == 0) {
return null;
}
return protections.get(0);
}
/**
* Fill the protection cache as much as possible with protections
* Caches the most recent protections
*/
public void precache() {
LWC lwc = LWC.getInstance();
LRUCache<String, Protection> cache = lwc.getCaches().getProtections();
// clear the cache incase we're working on a dirty cache
cache.clear();
int precacheSize = lwc.getConfiguration().getInt("core.precache", -1);
if (precacheSize == -1) {
precacheSize = lwc.getConfiguration().getInt("core.cacheSize", 10000);
}
try {
PreparedStatement statement = prepare("SELECT " + prefix + "protections.id AS protectionId, " + prefix + "rights.id AS rightsId, " + prefix + "protections.type AS protectionType, " + prefix + "rights.type AS rightsType, x, y, z, flags, blockId, world, owner, password, date, entity, rights, last_accessed FROM " + prefix + "protections LEFT OUTER JOIN " + prefix + "rights ON " + prefix + "protections.id = " + prefix + "rights.chest ORDER BY " + prefix + "protections.id DESC LIMIT ?");
statement.setInt(1, precacheSize);
statement.setFetchSize(10);
// scrape the protections from the result set now
List<Protection> protections = resolveProtections(statement);
// throw all of the protections in
for (Protection protection : protections) {
String cacheKey = protection.getCacheKey();
cache.put(cacheKey, protection);
}
log("Precached " + protections.size() + " protections.");
} catch (SQLException e) {
printException(e);
}
// Cache them all
}
/**
* Used for the Bukkit #656 workaround to add a "cached" protection node when we find a
* 2-block chest. A protection normally only applies to one block, so this method will be
* called for the 2nd half of the chest to apply the same protection to the second block
* when it is first noticed. In this way, even if Bukkit goes bonkers (as in bug #656),
* and starts returning bogus Blocks, we have already cached the double chest when
* we first noticed it and the Protection will still apply.
*
* @param worldName
* @param x
* @param y
* @param z
*/
public void addCachedProtection(String worldName, int x, int y, int z, Protection p) {
String cacheKey = worldName + ":" + x + ":" + y + ":" + z;
LRUCache<String, Protection> cache = LWC.getInstance().getCaches().getProtections();
cache.put(cacheKey, p);
}
/**
* Return the cached Protection for a given block (if any).
*
* @param worldName
* @param x
* @param y
* @param z
* @return
*/
public Protection getCachedProtection(String worldName, int x, int y, int z) {
String cacheKey = worldName + ":" + x + ":" + y + ":" + z;
LRUCache<String, Protection> cache = LWC.getInstance().getCaches().getProtections();
return cache.get(cacheKey);
}
/**
* Load a chest at a given tile
*
* @param x
* @param y
* @param z
* @return the Protection object
*/
public Protection loadProtection(String worldName, int x, int y, int z) {
// the unique key to use in the cache
String cacheKey = worldName + ":" + x + ":" + y + ":" + z;
// the protection cache
LRUCache<String, Protection> cache = LWC.getInstance().getCaches().getProtections();
// check if the protection is already cached
if (cache.containsKey(cacheKey)) {
return cache.get(cacheKey);
}
try {
PreparedStatement statement = prepare("SELECT " + prefix + "protections.id AS protectionId, " + prefix + "rights.id AS rightsId, " + prefix + "protections.type AS protectionType, " + prefix + "rights.type AS rightsType, x, y, z, flags, blockId, world, owner, password, date, entity, rights, last_accessed FROM " + prefix + "protections LEFT OUTER JOIN " + prefix + "rights ON " + prefix + "protections.id = " + prefix + "rights.chest WHERE " + prefix + "protections.x = ? AND " + prefix + "protections.y = ? AND " + prefix + "protections.z = ? AND " + prefix + "protections.world = ?");
statement.setInt(1, x);
statement.setInt(2, y);
statement.setInt(3, z);
statement.setString(4, worldName);
Protection protection = resolveProtection(statement);
// cache the protection
cache.put(cacheKey, protection);
return protection;
} catch (SQLException e) {
printException(e);
}
return null;
}
/**
* Load all protections (use sparingly !!)
*
* @return
*/
public List<Protection> loadProtections() {
try {
PreparedStatement statement = prepare("SELECT " + prefix + "protections.id AS protectionId, " + prefix + "rights.id AS rightsId, " + prefix + "protections.type AS protectionType, " + prefix + "rights.type AS rightsType, x, y, z, flags, blockId, world, owner, password, date, entity, rights, last_accessed FROM " + prefix + "protections LEFT OUTER JOIN " + prefix + "rights ON " + prefix + "protections.id = " + prefix + "rights.chest");
return resolveProtections(statement);
} catch (Exception e) {
printException(e);
}
return new ArrayList<Protection>();
}
/**
* Load the first protection within a block's radius
*
* @param world
* @param x
* @param y
* @param z
* @param radius
* @return list of Protection objects found
*/
public List<Protection> loadProtections(String world, int x, int y, int z, int radius) {
try {
PreparedStatement statement = prepare("SELECT " + prefix + "protections.id AS protectionId, " + prefix + "rights.id AS rightsId, " + prefix + "protections.type AS protectionType, " + prefix + "rights.type AS rightsType, x, y, z, flags, blockId, world, owner, password, date, entity, rights, last_accessed FROM " + prefix + "protections LEFT OUTER JOIN " + prefix + "rights ON " + prefix + "protections.id = " + prefix + "rights.chest WHERE " + prefix + "protections.world = ? AND " + prefix + "protections.x >= ? AND " + prefix + "protections.x <= ? AND " + prefix + "protections.y >= ? AND " + prefix + "protections.y <= ? AND " + prefix + "protections.z >= ? AND " + prefix + "protections.z <= ?");
statement.setString(1, world);
statement.setInt(2, x - radius);
statement.setInt(3, x + radius);
statement.setInt(4, y - radius);
statement.setInt(5, y + radius);
statement.setInt(6, z - radius);
statement.setInt(7, z + radius);
return resolveProtections(statement);
} catch (Exception e) {
printException(e);
}
return new ArrayList<Protection>();
}
/**
* Load protections by a player
*
* @param player
* @param start
* @param count
* @return
*/
public List<Protection> loadProtectionsByPlayer(String player, int start, int count) {
List<Protection> protections = new ArrayList<Protection>();
try {
PreparedStatement statement = prepare("SELECT " + prefix + "protections.id AS protectionId, " + prefix + "rights.id AS rightsId, " + prefix + "protections.type AS protectionType, " + prefix + "rights.type AS rightsType, x, y, z, flags, blockId, world, owner, password, date, entity, rights, last_accessed FROM " + prefix + "protections LEFT OUTER JOIN " + prefix + "rights ON " + prefix + "protections.id = " + prefix + "rights.chest WHERE " + prefix + "protections.owner = ? ORDER BY " + prefix + "protections.id DESC limit ?,?");
statement.setString(1, player);
statement.setInt(2, start);
statement.setInt(3, count);
return resolveProtections(statement);
} catch (Exception e) {
printException(e);
}
return protections;
}
/**
* Get all access rights for a protection
*
* @return
*/
public List<AccessRight> loadRights(int protectionId) {
List<AccessRight> accessRights = new ArrayList<AccessRight>();
try {
PreparedStatement statement = prepare("SELECT * FROM " + prefix + "rights WHERE chest = ?");
statement.setInt(1, protectionId);
ResultSet set = statement.executeQuery();
while (set.next()) {
AccessRight accessRight = new AccessRight();
accessRight.setId(set.getInt("id"));
accessRight.setProtectionId(set.getInt("chest"));
accessRight.setName(set.getString("entity"));
accessRight.setRights(set.getInt("rights"));
accessRight.setType(set.getInt("type"));
accessRights.add(accessRight);
}
set.close();
} catch (Exception e) {
printException(e);
}
return accessRights;
}
/**
* Register a protection
*
* @param blockId
* @param type
* @param world
* @param player
* @param data
* @param x
* @param y
* @param z
*/
public Protection registerProtection(int blockId, int type, String world, String player, String data, int x, int y, int z) {
try {
PreparedStatement statement = prepare("INSERT INTO " + prefix + "protections (blockId, type, world, owner, password, x, y, z, date, last_accessed) VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?)");
statement.setInt(1, blockId);
statement.setInt(2, type);
statement.setString(3, world);
statement.setString(4, player);
statement.setString(5, data);
statement.setInt(6, x);
statement.setInt(7, y);
statement.setInt(8, z);
statement.setString(9, new Timestamp(new Date().getTime()).toString());
statement.setLong(10, System.currentTimeMillis() / 1000L);
statement.executeUpdate();
// remove the null protection from cache if it's in there
LWC.getInstance().getCaches().getProtections().remove(world + ":" + x + ":" + y + ":" + z);
// We need to create the initial transaction for this protection
// this transaction is viewable and modifiable during POST_REGISTRATION
Protection protection = loadProtection(world, x, y, z);
// if history logging is enabled, create it
if(LWC.getInstance().isHistoryEnabled() && protection != null) {
History transaction = protection.createHistoryObject();
transaction.setPlayer(player);
transaction.setType(History.Type.TRANSACTION);
transaction.setStatus(History.Status.ACTIVE);
// store the player that created the protection
transaction.addMetaData("creator=" + player);
// now sync the history object to the database
transaction.sync();
}
// return the newly created protection
return protection;
} catch (SQLException e) {
printException(e);
}
return null;
}
/**
* Sync a History object to the database or save a newly created one
*
* @param history
*/
public void saveHistory(History history) {
try {
PreparedStatement statement;
// prepared statement index
int index = 1;
if (history.doesExist()) {
statement = prepare("REPLACE INTO " + prefix + "history (id, protectionId, player, type, status, metadata) VALUES (?, ?, ?, ?, ?, ?)");
statement.setInt(index++, history.getId());
} else {
statement = prepare("INSERT INTO " + prefix + "history (protectionId, player, type, status, metadata, timestamp) VALUES (?, ?, ?, ?, ?, ?)", true);
}
statement.setInt(index++, history.getProtectionId());
statement.setString(index++, history.getPlayer());
statement.setInt(index++, history.getType().ordinal());
statement.setInt(index++, history.getStatus().ordinal());
statement.setString(index++, history.getSafeMetaData());
if (!history.doesExist()) {
statement.setLong(index++, System.currentTimeMillis() / 1000L);
}
int affectedRows = statement.executeUpdate();
// set the history id if inserting
if(!history.doesExist()) {
if(affectedRows > 0) {
ResultSet generatedKeys = statement.getGeneratedKeys();
// get the key inserted
if(generatedKeys.next()) {
history.setId(generatedKeys.getInt(1));
}
generatedKeys.close();
}
}
} catch (SQLException e) {
printException(e);
}
}
/**
* Load all of the History objects for a given protection
*
* @param protection
* @return
*/
public List<History> loadHistory(Protection protection) {
List<History> temp = new ArrayList<History>();