| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.openjpa.kernel; |
| |
| import org.apache.openjpa.meta.ClassMetaData; |
| import org.apache.openjpa.util.RuntimeExceptionTranslator; |
| |
| /////////////////////////////////////////////////////////////// |
| // NOTE: when adding a public API method, be sure to add it to |
| // JDO and JPA facades! |
| /////////////////////////////////////////////////////////////// |
| |
| /** |
| * Delegating sequence that can also perform exception translation for use |
| * in facades. |
| * |
| * @author Abe White |
| */ |
| public class DelegatingSeq |
| implements Seq { |
| |
| private final Seq _seq; |
| private final DelegatingSeq _del; |
| private final RuntimeExceptionTranslator _trans; |
| |
| /** |
| * Constructor; supply delegate. |
| */ |
| public DelegatingSeq(Seq seq) { |
| this(seq, null); |
| } |
| |
| /** |
| * Constructor; supply delegate and exception translator. |
| */ |
| public DelegatingSeq(Seq seq, RuntimeExceptionTranslator trans) { |
| _seq = seq; |
| if (seq instanceof DelegatingSeq) |
| _del = (DelegatingSeq) seq; |
| else |
| _del = null; |
| _trans = trans; |
| } |
| |
| /** |
| * Return the direct delegate. |
| */ |
| public Seq getDelegate() { |
| return _seq; |
| } |
| |
| /** |
| * Return the native delegate. |
| */ |
| public Seq getInnermostDelegate() { |
| return (_del == null) ? _seq : _del.getInnermostDelegate(); |
| } |
| |
| @Override |
| public int hashCode() { |
| return getInnermostDelegate().hashCode(); |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| if (other == this) |
| return true; |
| if (other instanceof DelegatingSeq) |
| other = ((DelegatingSeq) other).getInnermostDelegate(); |
| return getInnermostDelegate().equals(other); |
| } |
| |
| /** |
| * Translate the OpenJPA exception. |
| */ |
| protected RuntimeException translate(RuntimeException re) { |
| return (_trans == null) ? re : _trans.translate(re); |
| } |
| |
| @Override |
| public void setType(int type) { |
| try { |
| _seq.setType(type); |
| } catch (RuntimeException re) { |
| throw translate(re); |
| } |
| } |
| |
| @Override |
| public Object next(StoreContext ctx, ClassMetaData meta) { |
| try { |
| return _seq.next(ctx, meta); |
| } catch (RuntimeException re) { |
| throw translate(re); |
| } |
| } |
| |
| @Override |
| public Object current(StoreContext ctx, ClassMetaData meta) { |
| try { |
| return _seq.current(ctx, meta); |
| } catch (RuntimeException re) { |
| throw translate(re); |
| } |
| } |
| |
| @Override |
| public void allocate(int additional, StoreContext ctx, ClassMetaData meta) { |
| try { |
| _seq.allocate(additional, ctx, meta); |
| } catch (RuntimeException re) { |
| throw translate(re); |
| } |
| } |
| |
| @Override |
| public void close() { |
| try { |
| _seq.close(); |
| } catch (RuntimeException re) { |
| throw translate(re); |
| } |
| } |
| } |