| /* |
| * |
| * 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.*; |
| |
| import org.apache.qpid.proton.codec.Data; |
| |
| class ListElement extends AbstractElement<List<Object>> |
| { |
| private Element _first; |
| |
| ListElement(Element parent, Element prev) |
| { |
| super(parent, prev); |
| } |
| |
| public int count() |
| { |
| int count = 0; |
| Element elt = _first; |
| while(elt != null) |
| { |
| count++; |
| elt = elt.next(); |
| } |
| return count; |
| } |
| |
| |
| @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()) |
| { |
| ArrayElement parent = (ArrayElement) parent(); |
| if(parent.constructorType() == ArrayElement.TINY) |
| { |
| if(count != 0) |
| { |
| parent.setConstructorType(ArrayElement.ConstructorType.SMALL); |
| size += 2; |
| } |
| } |
| else if(parent.constructorType() == ArrayElement.SMALL) |
| { |
| if(count > 255 || size > 254) |
| { |
| parent.setConstructorType(ArrayElement.ConstructorType.LARGE); |
| size += 8; |
| } |
| else |
| { |
| size += 2; |
| } |
| } |
| else |
| { |
| size += 8; |
| } |
| |
| } |
| else |
| { |
| if(count == 0) |
| { |
| size = 1; |
| } |
| else if(count <= 255 && size <= 254) |
| { |
| size += 3; |
| } |
| else |
| { |
| size+=9; |
| } |
| } |
| |
| return size; |
| } |
| |
| @Override |
| public List<Object> getValue() |
| { |
| List<Object> list = new ArrayList<Object>(); |
| Element elt = _first; |
| while(elt != null) |
| { |
| list.add(elt.getValue()); |
| elt = elt.next(); |
| } |
| |
| return Collections.unmodifiableList(list); |
| } |
| |
| @Override |
| public Data.DataType getDataType() |
| { |
| return Data.DataType.LIST; |
| } |
| |
| @Override |
| public int encode(ByteBuffer b) |
| { |
| int encodedSize = size(); |
| |
| int count = 0; |
| int size = 0; |
| Element elt = _first; |
| while(elt != null) |
| { |
| count++; |
| size += elt.size(); |
| elt = elt.next(); |
| } |
| |
| if(encodedSize > b.remaining()) |
| { |
| return 0; |
| } |
| else |
| { |
| if(isElementOfArray()) |
| { |
| switch(((ArrayElement)parent()).constructorType()) |
| { |
| case TINY: |
| break; |
| case SMALL: |
| b.put((byte)(size+1)); |
| b.put((byte)count); |
| break; |
| case LARGE: |
| b.putInt((size+4)); |
| b.putInt(count); |
| } |
| } |
| else |
| { |
| if(count == 0) |
| { |
| b.put((byte)0x45); |
| } |
| else if(size <= 254 && count <=255) |
| { |
| b.put((byte)0xc0); |
| b.put((byte)(size+1)); |
| b.put((byte)count); |
| } |
| else |
| { |
| b.put((byte)0xd0); |
| b.putInt((size+4)); |
| b.putInt(count); |
| } |
| |
| } |
| |
| elt = _first; |
| while(elt != null) |
| { |
| elt.encode(b); |
| elt = elt.next(); |
| } |
| |
| 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) |
| { |
| return element; |
| } |
| |
| @Override |
| public Element addChild(Element element) |
| { |
| _first = element; |
| return element; |
| } |
| |
| @Override |
| String startSymbol() { |
| return "["; |
| } |
| |
| @Override |
| String stopSymbol() { |
| return "]"; |
| } |
| |
| } |