| /* |
| * |
| * 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.nio.charset.Charset; |
| |
| import org.apache.qpid.proton.amqp.Symbol; |
| import org.apache.qpid.proton.codec.Data; |
| |
| class StringElement extends AtomicElement<String> |
| { |
| |
| private static final Charset UTF_8 = Charset.forName("UTF-8"); |
| private final String _value; |
| |
| StringElement(Element parent, Element prev, String s) |
| { |
| super(parent, prev); |
| _value = s; |
| } |
| |
| @Override |
| public int size() |
| { |
| final int length = _value.getBytes(UTF_8).length; |
| |
| return size(length); |
| } |
| |
| private int size(int length) |
| { |
| if(isElementOfArray()) |
| { |
| final ArrayElement parent = (ArrayElement) parent(); |
| |
| if(parent.constructorType() == ArrayElement.SMALL) |
| { |
| if(length > 255) |
| { |
| parent.setConstructorType(ArrayElement.LARGE); |
| return 4+length; |
| } |
| else |
| { |
| return 1+length; |
| } |
| } |
| else |
| { |
| return 4+length; |
| } |
| } |
| else |
| { |
| if(length >255) |
| { |
| return 5 + length; |
| } |
| else |
| { |
| return 2 + length; |
| } |
| } |
| } |
| |
| @Override |
| public String getValue() |
| { |
| return _value; |
| } |
| |
| @Override |
| public Data.DataType getDataType() |
| { |
| return Data.DataType.STRING; |
| } |
| |
| @Override |
| public int encode(ByteBuffer b) |
| { |
| final byte[] bytes = _value.getBytes(UTF_8); |
| final int length = bytes.length; |
| |
| int size = size(length); |
| if(b.remaining()<size) |
| { |
| return 0; |
| } |
| if(isElementOfArray()) |
| { |
| final ArrayElement parent = (ArrayElement) parent(); |
| |
| if(parent.constructorType() == ArrayElement.SMALL) |
| { |
| b.put((byte)length); |
| } |
| else |
| { |
| b.putInt(length); |
| } |
| } |
| else if(length<=255) |
| { |
| b.put((byte)0xa1); |
| b.put((byte)length); |
| } |
| else |
| { |
| b.put((byte)0xb1); |
| b.putInt(length); |
| } |
| b.put(bytes); |
| return size; |
| |
| } |
| } |