| /* |
| * |
| * 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.proton.codec.impl; |
| |
| import java.nio.ByteBuffer; |
| import java.util.AbstractSequentialList; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.ListIterator; |
| |
| import org.apache.qpid.proton.amqp.DescribedType; |
| import org.apache.qpid.proton.codec.Data; |
| |
| class DescribedTypeElement extends AbstractElement<DescribedType> |
| { |
| private Element _first; |
| |
| DescribedTypeElement(Element parent, Element prev) |
| { |
| super(parent, prev); |
| } |
| |
| |
| |
| |
| @Override |
| public int size() |
| { |
| int count = 0; |
| int size = 0; |
| Element elt = _first; |
| while(elt != null) |
| { |
| count++; |
| size += elt.size(); |
| elt = elt.next(); |
| } |
| |
| if(isElementOfArray()) |
| { |
| throw new IllegalArgumentException("Cannot add described type members to an array"); |
| } |
| else if(count > 2) |
| { |
| throw new IllegalArgumentException("Too many elements in described type"); |
| } |
| else if(count == 0) |
| { |
| size = 3; |
| } |
| else if(count == 1) |
| { |
| size += 2; |
| } |
| else |
| { |
| size+=1; |
| } |
| |
| return size; |
| } |
| |
| @Override |
| public DescribedType getValue() |
| { |
| final Object descriptor = _first == null ? null : _first.getValue(); |
| Element second = _first == null ? null : _first.next(); |
| final Object described = second == null ? null : second.getValue(); |
| return new DescribedTypeImpl(descriptor,described); |
| } |
| |
| @Override |
| public Data.DataType getDataType() |
| { |
| return Data.DataType.DESCRIBED; |
| } |
| |
| @Override |
| public int encode(ByteBuffer b) |
| { |
| int encodedSize = size(); |
| |
| if(encodedSize > b.remaining()) |
| { |
| return 0; |
| } |
| else |
| { |
| b.put((byte) 0); |
| if(_first == null) |
| { |
| b.put((byte)0x40); |
| b.put((byte)0x40); |
| } |
| else |
| { |
| _first.encode(b); |
| if(_first.next() == null) |
| { |
| b.put((byte)0x40); |
| } |
| else |
| { |
| _first.next().encode(b); |
| } |
| } |
| } |
| return encodedSize; |
| } |
| |
| @Override |
| public boolean canEnter() |
| { |
| return true; |
| } |
| |
| @Override |
| public Element child() |
| { |
| return _first; |
| } |
| |
| @Override |
| public void setChild(Element elt) |
| { |
| _first = elt; |
| } |
| |
| @Override |
| public Element checkChild(Element element) |
| { |
| if(element.prev() != _first) |
| { |
| throw new IllegalArgumentException("Described Type may only have two elements"); |
| } |
| return element; |
| |
| } |
| |
| @Override |
| public Element addChild(Element element) |
| { |
| _first = element; |
| return element; |
| } |
| |
| @Override |
| String startSymbol() { |
| return "("; |
| } |
| |
| @Override |
| String stopSymbol() { |
| return ")"; |
| } |
| |
| } |