| /** |
| * 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.kerby.xdr.type; |
| |
| import org.apache.kerby.xdr.XdrDataType; |
| |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| |
| /** |
| * The abstract XDR type for all the XDR types. It provides basic |
| * encoding and decoding utilities. |
| * |
| * @param <T> the type of the value encoded/decoded or wrapped by this |
| */ |
| public abstract class AbstractXdrType<T> implements XdrType { |
| private XdrDataType dataType; |
| |
| // The wrapped real value. |
| private T value; |
| |
| /** |
| * Default constructor. |
| * @param dataType the dataType |
| * @param value the value |
| */ |
| public AbstractXdrType(XdrDataType dataType, T value) { |
| this(dataType); |
| this.value = value; |
| } |
| |
| /** |
| * Default constructor. |
| * @param dataType the dataType |
| */ |
| public AbstractXdrType(XdrDataType dataType) { |
| this.dataType = dataType; |
| } |
| |
| @Override |
| public byte[] encode() throws IOException { |
| int len = encodingLength(); |
| ByteBuffer byteBuffer = ByteBuffer.allocate(len); |
| encode(byteBuffer); |
| byteBuffer.flip(); |
| return byteBuffer.array(); |
| } |
| |
| @Override |
| public void encode(ByteBuffer buffer) throws IOException { |
| encodeBody(buffer); |
| } |
| |
| protected abstract void encodeBody(ByteBuffer buffer) throws IOException; |
| |
| @Override |
| public void decode(byte[] content) throws IOException { |
| decode(ByteBuffer.wrap(content)); |
| } |
| |
| @Override |
| public int encodingLength() throws IOException { |
| return encodingBodyLength(); |
| } |
| |
| protected abstract int encodingBodyLength() throws IOException; |
| |
| @Override |
| public void decode(ByteBuffer content) throws IOException { |
| } |
| |
| public T getValue() { |
| return value; |
| } |
| |
| public void setValue(T value) { |
| this.value = value; |
| } |
| |
| public XdrDataType getDataType() { |
| return dataType; |
| } |
| } |