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Update ORM

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This commit is contained in:
Marc Baloup 2019-07-05 22:17:45 +02:00
parent 7cdd1befdc
commit 7739473213
1 changed files with 98 additions and 7 deletions
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105
src/main/java/fr/pandacube/java/util/orm/ORM.java
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@ -7,6 +7,7 @@ import java.sql.Statement;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.function.Consumer;
import org.javatuples.Pair;
@ -107,12 +108,22 @@ public final class ORM {
}
public static <E extends SQLElement<E>> E getById(Class<E> elemClass, int id) throws ORMException {
return getFirst(elemClass, new SQLWhereComp(getSQLIdField(elemClass), SQLComparator.EQ, id), null);
return getFirst(elemClass, new SQLWhereComp(getSQLIdField(elemClass), SQLComparator.EQ, id));
}
public static <E extends SQLElement<E>> E getFirst(Class<E> elemClass, SQLWhere where)
throws ORMException {
return getFirst(elemClass, where, null, null);
}
public static <E extends SQLElement<E>> E getFirst(Class<E> elemClass, SQLWhere where, SQLOrderBy orderBy)
throws ORMException {
SQLElementList<E> elts = getAll(elemClass, where, orderBy, 1, null);
return getFirst(elemClass, where, orderBy, null);
}
public static <E extends SQLElement<E>> E getFirst(Class<E> elemClass, SQLWhere where, SQLOrderBy orderBy, Integer offset)
throws ORMException {
SQLElementList<E> elts = getAll(elemClass, where, orderBy, 1, offset);
return (elts.size() == 0) ? null : elts.get(0);
}
@ -120,8 +131,48 @@ public final class ORM {
return getAll(elemClass, null, null, null, null);
}
public static <E extends SQLElement<E>> SQLElementList<E> getAll(Class<E> elemClass, SQLWhere where) throws ORMException {
return getAll(elemClass, where, null, null, null);
}
public static <E extends SQLElement<E>> SQLElementList<E> getAll(Class<E> elemClass, SQLWhere where,
SQLOrderBy orderBy) throws ORMException {
return getAll(elemClass, where, orderBy, null, null);
}
public static <E extends SQLElement<E>> SQLElementList<E> getAll(Class<E> elemClass, SQLWhere where,
SQLOrderBy orderBy, Integer limit) throws ORMException {
return getAll(elemClass, where, orderBy, limit, null);
}
public static <E extends SQLElement<E>> SQLElementList<E> getAll(Class<E> elemClass, SQLWhere where,
SQLOrderBy orderBy, Integer limit, Integer offset) throws ORMException {
SQLElementList<E> elmts = new SQLElementList<>();
forEach(elemClass, where, orderBy, limit, offset, elmts::add);
return elmts;
}
public static <E extends SQLElement<E>> void forEach(Class<E> elemClass, Consumer<E> action) throws ORMException {
forEach(elemClass, null, null, null, null, action);
}
public static <E extends SQLElement<E>> void forEach(Class<E> elemClass, SQLWhere where,
Consumer<E> action) throws ORMException {
forEach(elemClass, where, null, null, null, action);
}
public static <E extends SQLElement<E>> void forEach(Class<E> elemClass, SQLWhere where,
SQLOrderBy orderBy, Consumer<E> action) throws ORMException {
forEach(elemClass, where, orderBy, null, null, action);
}
public static <E extends SQLElement<E>> void forEach(Class<E> elemClass, SQLWhere where,
SQLOrderBy orderBy, Integer limit, Consumer<E> action) throws ORMException {
forEach(elemClass, where, orderBy, limit, null, action);
}
public static <E extends SQLElement<E>> void forEach(Class<E> elemClass, SQLWhere where,
SQLOrderBy orderBy, Integer limit, Integer offset, Consumer<E> action) throws ORMException {
initTable(elemClass);
try {
@ -139,7 +190,46 @@ public final class ORM {
if (offset != null) sql += " OFFSET " + offset;
sql += ";";
SQLElementList<E> elmts = new SQLElementList<>();
try (PreparedStatement ps = connection.getNativeConnection().prepareStatement(sql)) {
int i = 1;
for (Object val : params) {
if (val instanceof Enum<?>) val = ((Enum<?>) val).name();
ps.setObject(i++, val);
}
Log.debug(ps.toString());
try (ResultSet set = ps.executeQuery()) {
while (set.next()) {
E elm = getElementInstance(set, elemClass);
action.accept(elm);
}
}
}
} catch (ReflectiveOperationException | SQLException e) {
throw new ORMException(e);
}
}
public static <E extends SQLElement<E>> long count(Class<E> elemClass) throws ORMException {
return count(elemClass, null);
}
public static <E extends SQLElement<E>> long count(Class<E> elemClass, SQLWhere where) throws ORMException {
initTable(elemClass);
try {
String sql = "SELECT COUNT(*) as count FROM " + elemClass.newInstance().tableName();
List<Object> params = new ArrayList<>();
if (where != null) {
Pair<String, List<Object>> ret = where.toSQL();
sql += " WHERE " + ret.getValue0();
params.addAll(ret.getValue1());
}
sql += ";";
try (PreparedStatement ps = connection.getNativeConnection().prepareStatement(sql)) {
@ -151,16 +241,17 @@ public final class ORM {
Log.debug(ps.toString());
try (ResultSet set = ps.executeQuery()) {
while (set.next())
elmts.add(getElementInstance(set, elemClass));
while (set.next()) {
return set.getLong(1);
}
}
}
return elmts;
} catch (ReflectiveOperationException | SQLException e) {
throw new ORMException(e);
}
throw new ORMException("Can’t retrieve element count from database (The ResultSet may be empty)");
}