| /* |
| * 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.vinci.transport; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| |
| import org.apache.vinci.debug.FatalException; |
| |
| /** |
| * SimpleTransportable is an immutable Transportable object that simply writes a byte buffer for its |
| * toStream implementation. It can be used for creating lightweight copies of more heavy-weight |
| * documents for high performance and simplified synchronization. Because it is immutable, the |
| * fromStream() method of this class throws an unchecked exception if invoked. |
| */ |
| public final class SimpleTransportable implements Transportable { |
| private final byte[] document; |
| |
| /** |
| * Create a SimpleTransportable that is an immutable copy of the provided Transportable object. |
| * |
| * @pre convert_me != null |
| * @param convert_me - |
| */ |
| public SimpleTransportable(Transportable convert_me) { |
| try { |
| ByteArrayOutputStream byte_out = new ByteArrayOutputStream(); |
| try { |
| convert_me.toStream(byte_out); |
| } finally { |
| byte_out.close(); |
| } |
| document = byte_out.toByteArray(); |
| } catch (IOException e) { |
| // Since the IOException should only come from the underlying stream (which |
| // in this case is a ByteArrayOutputStream), this should never happen. |
| throw new FatalException(e); |
| } |
| } |
| |
| /** |
| * @pre os != null |
| */ |
| public void toStream(OutputStream os) throws IOException { |
| os.write(document); |
| } |
| |
| /** |
| * Not implemented (throws UnsupportedOperationException if invoked) to preserve immutability. |
| * |
| * @throws UnsupportedOperationException |
| * thrown unconditionally. |
| */ |
| public KeyValuePair fromStream(InputStream os) throws IOException { |
| throw new UnsupportedOperationException("not implemented"); |
| } |
| |
| }// class |