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MySQL database will now store Collections in additional tables.

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This commit is contained in:
tastybento 2017-05-27 16:38:32 -07:00
parent c6d41ba1ee
commit 6be730f747
1 changed files with 63 additions and 9 deletions
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68
src/main/java/us/tastybento/bskyblock/database/mysql/MySQLDatabaseHandler.java
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@ -5,6 +5,9 @@ import java.beans.PropertyDescriptor;
import java.lang.reflect.Field; import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException; import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method; import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.lang.reflect.TypeVariable;
import java.math.BigDecimal; import java.math.BigDecimal;
import java.sql.Connection; import java.sql.Connection;
import java.sql.PreparedStatement; import java.sql.PreparedStatement;
@ -66,12 +69,14 @@ public class MySQLDatabaseHandler<T> extends AbstractDatabaseHandler<T> {
mySQLmapping.put(World.class.getTypeName(), "VARCHAR(254)"); mySQLmapping.put(World.class.getTypeName(), "VARCHAR(254)");
// TODO: Collections - these need to create another table and link to it // TODO: Collections - these need to create another table and link to it
mySQLmapping.put(Set.class.getTypeName(), "VARCHAR(254)"); // Collections are stored as additional tables. The boolean indicates whether there
mySQLmapping.put(Map.class.getTypeName(), "VARCHAR(254)"); // is any data in it or not (maybe)
mySQLmapping.put(HashMap.class.getTypeName(), "VARCHAR(254)"); mySQLmapping.put(Set.class.getTypeName(), "BOOL");
mySQLmapping.put(ArrayList.class.getTypeName(), "VARCHAR(254)"); mySQLmapping.put(Map.class.getTypeName(), "BOOL");
mySQLmapping.put(HashMap.class.getTypeName(), "BOOL");
mySQLmapping.put(ArrayList.class.getTypeName(), "BOOL");
} }
public MySQLDatabaseHandler(BSkyBlock plugin, Class<T> type, DatabaseConnecter databaseConnecter) { public MySQLDatabaseHandler(BSkyBlock plugin, Class<T> type, DatabaseConnecter databaseConnecter) {
super(plugin, type, databaseConnecter); super(plugin, type, databaseConnecter);
@ -108,7 +113,18 @@ public class MySQLDatabaseHandler<T> extends AbstractDatabaseHandler<T> {
String mapping = mySQLmapping.get(propertyDescriptor.getPropertyType().getTypeName()); String mapping = mySQLmapping.get(propertyDescriptor.getPropertyType().getTypeName());
if (mapping != null) { if (mapping != null) {
sql += "`" + field.getName() + "` " + mapping + ","; sql += "`" + field.getName() + "` " + mapping + ",";
// TODO: Create set and map tables. // Create set and map tables.
if (propertyDescriptor.getPropertyType().equals(Set.class) ||
propertyDescriptor.getPropertyType().equals(Map.class) ||
propertyDescriptor.getPropertyType().equals(HashMap.class) ||
propertyDescriptor.getPropertyType().equals(ArrayList.class)) {
String setSql = "CREATE TABLE IF NOT EXISTS " + type.getSimpleName() + "_" + field.getName() + " (";
// Get the type
setSql += getMethodParameterTypes(propertyDescriptor.getWriteMethod());
plugin.getLogger().info(setSql);
PreparedStatement collections = connection.prepareStatement(setSql);
collections.executeUpdate();
}
} else { } else {
sql += field.getName() + " VARCHAR(254),"; sql += field.getName() + " VARCHAR(254),";
plugin.getLogger().severe("Unknown type! Hoping it'll fit in a string!"); plugin.getLogger().severe("Unknown type! Hoping it'll fit in a string!");
@ -116,7 +132,7 @@ public class MySQLDatabaseHandler<T> extends AbstractDatabaseHandler<T> {
} }
//plugin.getLogger().info("DEBUG: SQL before trim string = " + sql); //plugin.getLogger().info("DEBUG: SQL before trim string = " + sql);
sql = sql.substring(0,(sql.length()-1)) + ")"; sql = sql.substring(0,(sql.length()-1)) + ")";
//plugin.getLogger().info("DEBUG: SQL string = " + sql); plugin.getLogger().info("DEBUG: SQL string = " + sql);
pstmt = connection.prepareStatement(sql.toString()); pstmt = connection.prepareStatement(sql.toString());
pstmt.executeUpdate(); pstmt.executeUpdate();
} catch (Exception e) { } catch (Exception e) {
@ -127,6 +143,44 @@ public class MySQLDatabaseHandler<T> extends AbstractDatabaseHandler<T> {
} }
} }
/**
* Gets the types for parameters in a method
* @param writeMethod
* @return List of strings with the SQL for parameter and type set
*/
private String getMethodParameterTypes(Method method) {
String result = "";
// Get the return type
Type[] genericParameterTypes = method.getGenericParameterTypes();
for (int i = 0; i < genericParameterTypes.length; i++) {
if( genericParameterTypes[i] instanceof ParameterizedType ) {
Type[] parameters = ((ParameterizedType)genericParameterTypes[i]).getActualTypeArguments();
//parameters[0] contains java.lang.String for method like "method(List<String> value)"
int index = 0;
String firstColumn = "";
for (Type type : parameters) {
plugin.getLogger().info("DEBUG: set type = " + type.getTypeName());
String setMapping = mySQLmapping.get(type.getTypeName());
String notNull = "";
if (index == 0) {
firstColumn = "`" + type.getTypeName() + "_" + index + "`";
notNull = " NOT NULL";
}
if (setMapping != null) {
result += "`" + type.getTypeName() + "_" + index + "` " + setMapping + notNull + ",";
} else {
result += "`" + type.getTypeName() + "_" + index + "` VARCHAR(254)" + notNull + ",";
plugin.getLogger().severe("Unknown type! Hoping it'll fit in a string!");
}
index++;
}
// Add primary key
result += " PRIMARY KEY (" + firstColumn + "))";
}
}
return result;
}
@Override @Override
protected String createSelectQuery() { protected String createSelectQuery() {