| /** |
| * 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.activemq.protobuf; |
| |
| import java.io.IOException; |
| |
| abstract public class DeferredDecodeMessage<T> extends BaseMessage<T> { |
| |
| protected Buffer encodedForm; |
| protected boolean decoded = true; |
| |
| @Override |
| public T mergeFramed(CodedInputStream input) throws IOException { |
| int length = input.readRawVarint32(); |
| int oldLimit = input.pushLimit(length); |
| T rc = mergeUnframed(input.readRawBytes(length)); |
| input.popLimit(oldLimit); |
| return rc; |
| } |
| |
| @SuppressWarnings("unchecked") |
| @Override |
| public T mergeUnframed(Buffer data) throws InvalidProtocolBufferException { |
| encodedForm = data; |
| decoded = false; |
| return (T) this; |
| } |
| |
| @Override |
| public Buffer toUnframedBuffer() { |
| if (encodedForm == null) { |
| encodedForm = super.toUnframedBuffer(); |
| } |
| return encodedForm; |
| } |
| |
| protected void load() { |
| if (!decoded) { |
| decoded = true; |
| try { |
| Buffer originalForm = encodedForm; |
| encodedForm=null; |
| CodedInputStream input = new CodedInputStream(originalForm); |
| mergeUnframed(input); |
| input.checkLastTagWas(0); |
| // We need to reset the encoded form because the mergeUnframed |
| // from a stream clears it out. |
| encodedForm = originalForm; |
| checktInitialized(); |
| } catch (Throwable e) { |
| throw new RuntimeException("Deferred message decoding failed: " + e.getMessage(), e); |
| } |
| } |
| } |
| |
| protected void loadAndClear() { |
| super.loadAndClear(); |
| load(); |
| encodedForm = null; |
| } |
| |
| public void clear() { |
| super.clear(); |
| encodedForm = null; |
| decoded = true; |
| } |
| |
| public boolean isDecoded() { |
| return decoded; |
| } |
| |
| public boolean isEncoded() { |
| return encodedForm != null; |
| } |
| |
| } |