Examples with DAOException org.eweb4j.orm.dao.DAOException used on opensource projects

Example 1 with DAOException

use of org.eweb4j.orm.dao.DAOException in project eweb4j-framework by laiweiwei.

the class OneToManyDAO method delete.

/**
	 * 
	 * 一对多（主从）级联删除 
	 * 1.前提条件必须主对象要存在于数据库中
	 * 2.检查当前主对象中的关联对象，如果关联对象为空，则删除所有与主对象有关的关联关系。
	 * 3.如果当前主对象中含有关联对象，则删除这些关联对象与主对象的关系
	 * 4.不会删除主对象
	 */
public void delete() throws DAOException {
    if (this.fields == null || this.fields.size() == 0)
        return;
    final Class<?> ownClass = ru.getObject().getClass();
    Transaction.execute(new Trans() {

        @Override
        public void run(Object... args) throws Exception {
            for (Field f : fields) {
                Method tarGetter = ru.getGetter(f.getName());
                if (tarGetter == null)
                    continue;
                OneToMany ann = tarGetter.getAnnotation(OneToMany.class);
                if (ann == null) {
                    ann = f.getAnnotation(OneToMany.class);
                    if (ann == null)
                        continue;
                }
                String mappedBy = ann.mappedBy();
                Class<?> tarClass = ann.targetEntity();
                if (void.class.isAssignableFrom(tarClass))
                    tarClass = ClassUtil.getGenericType(f);
                List<?> tarList = null;
                try {
                    tarList = (List<?>) tarGetter.invoke(t);
                } catch (Exception e) {
                    throw new DAOException(tarGetter + " invoke exception ", e);
                }
                if (tarList == null || tarList.size() == 0) {
                    // 当关联对象为空的时候，删除所有关联对象
                    ReflectUtil tarRu = new ReflectUtil(tarClass);
                    if (mappedBy == null || mappedBy.trim().length() == 0) {
                        for (Field tarObjField : tarRu.getFields()) {
                            if (!tarObjField.getType().getName().equals(ownClass.getName()))
                                continue;
                            Method tarObjFieldGetter = tarRu.getGetter(tarObjField.getName());
                            if (tarObjFieldGetter == null)
                                continue;
                            ManyToOne manyToOne = tarObjField.getAnnotation(ManyToOne.class);
                            if (manyToOne == null)
                                manyToOne = tarObjFieldGetter.getAnnotation(ManyToOne.class);
                            if (manyToOne == null)
                                continue;
                            mappedBy = tarObjField.getName();
                            String fromRefCol = null;
                            JoinColumn joinCol = tarObjField.getAnnotation(JoinColumn.class);
                            if (joinCol == null)
                                joinCol = tarObjFieldGetter.getAnnotation(JoinColumn.class);
                            if (joinCol != null)
                                fromRefCol = joinCol.referencedColumnName();
                            if (fromRefCol == null || fromRefCol.trim().length() == 0)
                                fromRefCol = ORMConfigBeanUtil.getIdColumn(t);
                            String fromRefField = ORMConfigBeanUtil.getField(ownClass, fromRefCol);
                            Method fromRefFieldGetter = ru.getGetter(fromRefField);
                            if (fromRefFieldGetter == null)
                                throw new Exception("can not find the 'from ref field field -> " + fromRefField + "' of " + ownClass + " 's getter method");
                            String fromRefVal = null;
                            Object _obj = fromRefFieldGetter.invoke(t);
                            if (_obj != null)
                                fromRefVal = String.valueOf(_obj);
                            DAOFactory.getDeleteDAO(dsName).deleteByFieldIsValue(tarClass, new String[] { tarObjField.getName() }, new String[] { fromRefVal });
                            break;
                        }
                    }
                } else {
                    // 当关联对象不为空的时候，删除这些关联对象
                    for (int i = 0; i < tarList.size(); i++) {
                        Object tarObj = tarList.get(i);
                        if (tarObj == null)
                            continue;
                        //如果这些对象没有ID值，跳过
                        Object tarObjIdVal = ORMConfigBeanUtil.getIdVal(tarObj);
                        if (tarObjIdVal == null)
                            continue;
                        ReflectUtil tarRu = new ReflectUtil(tarObj);
                        if (mappedBy != null && mappedBy.trim().length() > 0) {
                            Method ownFieldSetter = tarRu.getSetter(mappedBy);
                            if (ownFieldSetter == null)
                                continue;
                            // finished
                            DAOFactory.getDeleteDAO(dsName).deleteById(tarObj);
                        } else {
                            JoinTable joinTable = null;
                            if (f.isAnnotationPresent(JoinTable.class)) {
                                joinTable = f.getAnnotation(JoinTable.class);
                            } else if (tarGetter.isAnnotationPresent(JoinTable.class)) {
                                joinTable = tarGetter.getAnnotation(JoinTable.class);
                            } else {
                                // find ownclass in tarObj fields
                                for (Field tarObjField : tarRu.getFields()) {
                                    if (!tarObjField.getType().getName().equals(ownClass.getName()))
                                        continue;
                                    Method tarObjFieldGetter = tarRu.getGetter(tarObjField.getName());
                                    if (tarObjFieldGetter == null)
                                        continue;
                                    ManyToOne manyToOne = tarObjField.getAnnotation(ManyToOne.class);
                                    if (manyToOne == null)
                                        manyToOne = tarObjFieldGetter.getAnnotation(ManyToOne.class);
                                    if (manyToOne == null)
                                        continue;
                                    String fromRefCol = null;
                                    JoinColumn joinCol = tarObjField.getAnnotation(JoinColumn.class);
                                    if (joinCol == null)
                                        joinCol = tarObjFieldGetter.getAnnotation(JoinColumn.class);
                                    if (joinCol != null)
                                        fromRefCol = joinCol.referencedColumnName();
                                    if (fromRefCol == null || fromRefCol.trim().length() == 0)
                                        fromRefCol = ORMConfigBeanUtil.getIdColumn(t);
                                    String fromRefField = ORMConfigBeanUtil.getField(ownClass, fromRefCol);
                                    Method fromRefFieldGetter = ru.getGetter(fromRefField);
                                    if (fromRefFieldGetter == null)
                                        throw new Exception("can not find the 'from ref field field -> " + fromRefField + "' of " + ownClass + " 's getter method");
                                    String fromRefVal = null;
                                    Object _obj = fromRefFieldGetter.invoke(t);
                                    if (_obj != null)
                                        fromRefVal = String.valueOf(_obj);
                                    DAOFactory.getDeleteDAO(dsName).deleteByFieldIsValue(tarClass, new String[] { tarObjField.getName() }, new String[] { fromRefVal });
                                    break;
                                }
                            }
                            if (joinTable != null) {
                                JoinColumn[] froms = joinTable.joinColumns();
                                if (froms == null || froms.length == 0)
                                    continue;
                                String from = froms[0].name();
                                JoinColumn[] tos = joinTable.inverseJoinColumns();
                                if (tos == null || tos.length == 0)
                                    continue;
                                String to = tos[0].name();
                                String relTable = joinTable.name();
                                String fromRefCol = froms[0].referencedColumnName();
                                if (fromRefCol == null || fromRefCol.trim().length() == 0)
                                    fromRefCol = ORMConfigBeanUtil.getIdColumn(t);
                                String fromRefField = ORMConfigBeanUtil.getField(t.getClass(), fromRefCol);
                                Method fromRefFieldGetter = ru.getGetter(fromRefField);
                                if (fromRefFieldGetter == null)
                                    throw new Exception("can not find the 'from ref field -> " + fromRefField + "' of " + t.getClass() + " 's getter method");
                                Object _obj = fromRefFieldGetter.invoke(t);
                                if (_obj == null)
                                    continue;
                                String fromRefVal = String.valueOf(_obj);
                                String toRefCol = tos[0].referencedColumnName();
                                if (toRefCol == null || toRefCol.trim().length() == 0)
                                    toRefCol = ORMConfigBeanUtil.getIdColumn(tarClass);
                                String toRefField = ORMConfigBeanUtil.getField(tarClass, toRefCol);
                                Method toRefFieldGetter = tarRu.getGetter(toRefField);
                                if (toRefFieldGetter == null)
                                    throw new Exception("can not find the 'to ref field -> " + toRefField + "' of " + tarClass + " 's getter method");
                                Object _obj2 = toRefFieldGetter.invoke(tarObj);
                                if (_obj2 == null)
                                    continue;
                                String toRefVal = String.valueOf(_obj2);
                                // delete from relTable where from = ? and to = ? ;
                                String format = "delete from %s where %s = ? and %s = ? ;";
                                String sql = String.format(format, relTable, from, to);
                                // finished
                                DAOFactory.getUpdateDAO(dsName).updateBySQLWithArgs(sql, fromRefVal, toRefVal);
                            }
                        }
                    }
                }
            }
        }
    });
}

Example 2 with DAOException

use of org.eweb4j.orm.dao.DAOException in project eweb4j-framework by laiweiwei.

the class OneToManyDAO method select.

/**
	 * 一对多（主从）级联查询
	 */
public void select() throws DAOException {
    if (this.fields == null || this.fields.size() == 0)
        return;
    Class<?> ownClass = ru.getObject().getClass();
    String fromRefVal = null;
    for (Field f : fields) {
        Method tarGetter = ru.getGetter(f.getName());
        if (tarGetter == null)
            continue;
        OneToMany ann = tarGetter.getAnnotation(OneToMany.class);
        if (ann == null) {
            ann = f.getAnnotation(OneToMany.class);
            if (ann == null)
                continue;
        }
        OrderBy orderAnn = tarGetter.getAnnotation(OrderBy.class);
        if (orderAnn == null)
            orderAnn = f.getAnnotation(OrderBy.class);
        Class<?> tarClass = ann.targetEntity();
        if (void.class.isAssignableFrom(tarClass))
            tarClass = ClassUtil.getGenericType(f);
        String orderBy = "";
        if (orderAnn != null && orderAnn.value().trim().length() > 0)
            orderBy = " ORDER BY " + orderAnn.value().replace("t.", tarClass.getSimpleName().toLowerCase() + ".");
        String mappedBy = ann.mappedBy();
        try {
            ReflectUtil tarRu = new ReflectUtil(tarClass);
            List<?> tarList = null;
            JoinTable joinTable = null;
            if (f.isAnnotationPresent(JoinTable.class)) {
                joinTable = f.getAnnotation(JoinTable.class);
            } else if (tarGetter.isAnnotationPresent(JoinTable.class)) {
                joinTable = tarGetter.getAnnotation(JoinTable.class);
            }
            // 如果用户填写了 JoinTable注解，说明是第三方表建立的关联关系，需要查询第三方表和字段才能获取到targetList
            if (joinTable != null) {
                JoinColumn[] froms = joinTable.joinColumns();
                if (froms == null || froms.length == 0)
                    continue;
                String tarTable = joinTable.name();
                String from = froms[0].name();
                String fromRefCol = froms[0].referencedColumnName();
                if (fromRefCol == null || fromRefCol.trim().length() == 0)
                    fromRefCol = ORMConfigBeanUtil.getIdColumn(t);
                String fromRefField = ORMConfigBeanUtil.getField(t.getClass(), fromRefCol);
                Method fromRefFieldGetter = ru.getGetter(fromRefField);
                if (fromRefFieldGetter == null)
                    throw new Exception("can not find the 'from ref field -> " + fromRefField + "' of " + t.getClass() + " 's getter method");
                Object _obj = fromRefFieldGetter.invoke(t);
                if (_obj == null)
                    continue;
                fromRefVal = String.valueOf(_obj);
                String format = "select %s from %s where %s = ?  ;";
                String sql = String.format(format, ORMConfigBeanUtil.getSelectAllColumn(tarClass), tarTable, from) + orderBy;
                // finished
                tarList = DAOFactory.getSelectDAO(dsName).selectBySQL(tarClass, sql, fromRefVal);
            } else {
                // 否则的话按照ManyToOne去查询
                // 如果给定了 mappedBy，直接用这个mappedBy来获取filed，否则遍历。
                Field mappedField = null;
                if (mappedBy != null && mappedBy.trim().length() > 0) {
                    mappedField = tarRu.getField(mappedBy);
                } else {
                    for (Field field : tarRu.getFields()) {
                        if (!field.getType().getName().equals(ownClass.getName()))
                            continue;
                        mappedField = field;
                        mappedBy = mappedField.getName();
                        break;
                    }
                }
                if (mappedField == null)
                    throw new Exception("mapped field of " + tarClass + " not found");
                Method tarObjFieldGetter = tarRu.getGetter(mappedBy);
                if (tarObjFieldGetter == null)
                    continue;
                ManyToOne manyToOne = mappedField.getAnnotation(ManyToOne.class);
                if (manyToOne == null)
                    manyToOne = tarObjFieldGetter.getAnnotation(ManyToOne.class);
                if (manyToOne == null)
                    continue;
                String fromRefCol = null;
                JoinColumn joinCol = mappedField.getAnnotation(JoinColumn.class);
                if (joinCol == null)
                    joinCol = tarObjFieldGetter.getAnnotation(JoinColumn.class);
                if (joinCol != null)
                    fromRefCol = joinCol.referencedColumnName();
                if (fromRefCol == null || fromRefCol.trim().length() == 0)
                    fromRefCol = ORMConfigBeanUtil.getIdColumn(t);
                String fromRefField = ORMConfigBeanUtil.getField(ownClass, fromRefCol);
                Method fromRefFieldGetter = ru.getGetter(fromRefField);
                if (fromRefFieldGetter == null)
                    throw new Exception("can not find the 'from ref field field -> " + fromRefField + "' of " + ownClass + " 's getter method");
                Object _obj = fromRefFieldGetter.invoke(t);
                if (_obj != null)
                    fromRefVal = String.valueOf(_obj);
                String format = "select %s from %s where %s = ?  ;";
                String sql = String.format(format, ORMConfigBeanUtil.getSelectAllColumn(tarClass), ORMConfigBeanUtil.getTable(tarClass, true), ORMConfigBeanUtil.getColumn(tarClass, mappedBy)) + orderBy;
                // finished
                tarList = DAOFactory.getSelectDAO(dsName).selectBySQL(tarClass, sql, fromRefVal);
            }
            if (tarList == null)
                continue;
            Method tarSetter = ru.getSetter(f.getName());
            if (tarSetter == null)
                continue;
            tarSetter.invoke(t, tarList);
        } catch (Exception e) {
            throw new DAOException("", e);
        }
    }
}

Example 3 with DAOException

use of org.eweb4j.orm.dao.DAOException in project eweb4j-framework by laiweiwei.

the class ToOneDAO method init.

/**
	 * 初始化
	 * 
	 * @param t
	 * @param fields
	 * @throws DAOException
	 */
public void init(Object t, List<Field> fields) throws DAOException {
    this.t = t;
    this.fields = fields;
    this.ru = new ReflectUtil(this.t);
    this.table = ORMConfigBeanUtil.getTable(t.getClass(), true);
    // 主类的ID属性名
    this.idField = ORMConfigBeanUtil.getIdField(this.t.getClass());
    this.idColumn = ORMConfigBeanUtil.getIdColumn(this.t.getClass());
    this.idGetter = ru.getGetter(idField);
    //		if (idGetter == null)
    //			throw new DAOException("can not find idGetter.", null);
    Object idVal;
    if (idGetter != null) {
        try {
            idVal = idGetter.invoke(this.t);
            this.idVal = idVal == null ? null : String.valueOf(idVal);
        } catch (Exception e) {
            throw new DAOException("", e);
        }
    }
}

Example 4 with DAOException

use of org.eweb4j.orm.dao.DAOException in project eweb4j-framework by laiweiwei.

the class DeleteDAOImpl method deleteByFieldIsValue.

public <T> Number[] deleteByFieldIsValue(Class<T>[] clazz, String[] fields, String[] values) throws DAOException {
    Number[] ids = null;
    Connection con = null;
    if (clazz == null || clazz.length == 0)
        return ids;
    ids = new Number[clazz.length];
    try {
        con = ds.getConnection();
        Object[] ts = new Object[clazz.length];
        for (int i = 0; i < clazz.length; ++i) {
            ts[i] = clazz[i].newInstance();
        }
        Sql[] sqls = SqlFactory.getDeleteSql(ts).delete(fields, values);
        List<Object[]> argList = new ArrayList<Object[]>(ts.length);
        for (Sql sql : sqls) {
            argList.add(sql.args.toArray());
        }
        Object[][] args = new Object[argList.size()][];
        for (int i = 0; i < argList.size(); i++) {
            args[i] = argList.get(i);
        }
        ids = JdbcUtil.batchUpdateWithArgs(con, sqls[0].sql, args);
    } catch (Exception e) {
        throw new DAOException("", e);
    }
    return ids;
}

Example 5 with DAOException

use of org.eweb4j.orm.dao.DAOException in project eweb4j-framework by laiweiwei.

the class DeleteDAOImpl method deleteByFields.

public <T> Number deleteByFields(T t, String[] fields) throws DAOException {
    Number id = 0;
    if (t != null) {
        Connection con = null;
        try {
            con = ds.getConnection();
            Sql[] sqls = SqlFactory.getDeleteSql(new Object[] { t }).delete(fields);
            id = JdbcUtil.updateWithArgs(con, sqls[0].sql, sqls[0].args.toArray());
        } catch (Exception e) {
            throw new DAOException("", e);
        }
    }
    return id;
}