| /* |
| * |
| * 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.qpid.server.protocol.v1_0.codec; |
| |
| import java.nio.charset.Charset; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| |
| import org.apache.qpid.server.bytebuffer.QpidByteBuffer; |
| import org.apache.qpid.server.protocol.v1_0.type.AmqpErrorException; |
| import org.apache.qpid.server.protocol.v1_0.type.Symbol; |
| import org.apache.qpid.server.protocol.v1_0.type.transport.AmqpError; |
| |
| public class SymbolTypeConstructor extends VariableWidthTypeConstructor<Symbol> |
| { |
| private static final Charset ASCII = Charset.forName("US-ASCII"); |
| |
| private static final ConcurrentMap<BinaryString, Symbol> SYMBOL_MAP = |
| new ConcurrentHashMap<>(2048); |
| |
| public static SymbolTypeConstructor getInstance(int i) |
| { |
| return new SymbolTypeConstructor(i); |
| } |
| |
| |
| private SymbolTypeConstructor(int size) |
| { |
| super(size); |
| } |
| |
| @Override |
| public Symbol construct(final QpidByteBuffer in, final ValueHandler handler) throws AmqpErrorException |
| { |
| |
| int size; |
| |
| if (!in.hasRemaining(getSize())) |
| { |
| throw new AmqpErrorException(AmqpError.DECODE_ERROR, "Cannot construct symbol: insufficient input data"); |
| } |
| |
| if (getSize() == 1) |
| { |
| size = in.getUnsignedByte(); |
| } |
| else |
| { |
| size = in.getInt(); |
| } |
| |
| if (!in.hasRemaining(size)) |
| { |
| throw new AmqpErrorException(AmqpError.DECODE_ERROR, "Cannot construct symbol: insufficient input data"); |
| } |
| |
| byte[] data = new byte[size]; |
| in.get(data); |
| final BinaryString binaryStr = new BinaryString(data); |
| |
| Symbol symbolVal = SYMBOL_MAP.get(binaryStr); |
| if (symbolVal == null) |
| { |
| symbolVal = Symbol.valueOf(new String(data, ASCII)); |
| SYMBOL_MAP.putIfAbsent(binaryStr, symbolVal); |
| } |
| |
| return symbolVal; |
| } |
| } |