| // Copyright 2008 Google Inc. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package com.google.gwtorm.jdbc; |
| |
| import com.google.gwtorm.client.Key; |
| import com.google.gwtorm.server.AbstractResultSet; |
| import com.google.gwtorm.server.OrmRuntimeException; |
| |
| import java.sql.PreparedStatement; |
| import java.sql.ResultSet; |
| import java.sql.SQLException; |
| import java.util.NoSuchElementException; |
| |
| class JdbcResultSet<T, K extends Key<?>> extends AbstractResultSet<T> { |
| private final JdbcAccess<T, K> access; |
| private final ResultSet rs; |
| private final PreparedStatement ps; |
| private Boolean haveRow; |
| private boolean closed; |
| |
| JdbcResultSet(JdbcAccess<T, K> jdbcAccess, ResultSet rs, PreparedStatement ps) { |
| this.access = jdbcAccess; |
| this.rs = rs; |
| this.ps = ps; |
| this.haveRow = Boolean.TRUE; |
| } |
| |
| @Override |
| protected boolean hasNext() { |
| if (closed) { |
| return false; |
| } |
| |
| if (haveRow == null) { |
| try { |
| if (rs.next()) { |
| haveRow = Boolean.TRUE; |
| } else { |
| haveRow = Boolean.FALSE; |
| close(); |
| } |
| } catch (SQLException err) { |
| close(); |
| throw new OrmRuntimeException(access.convertError("fetch", err)); |
| } |
| } |
| |
| return haveRow; |
| } |
| |
| @Override |
| protected T next() { |
| if (!hasNext()) { |
| throw new NoSuchElementException(); |
| } |
| |
| final T o = access.newEntityInstance(); |
| try { |
| access.bindOneFetch(rs, o); |
| } catch (SQLException err) { |
| close(); |
| throw new OrmRuntimeException(access.convertError("fetch", err)); |
| } |
| |
| haveRow = null; |
| hasNext(); |
| return o; |
| } |
| |
| @Override |
| public void close() { |
| if (!closed) { |
| closed = true; |
| |
| try { |
| rs.close(); |
| } catch (SQLException e) { |
| // Ignore |
| } |
| |
| try { |
| ps.close(); |
| } catch (SQLException e) { |
| // Ignore |
| } |
| } |
| } |
| } |