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Diffstat (limited to 'qpid/dotnet/client-010/client/transport/codec/AbstractDecoder.cs')
-rw-r--r--qpid/dotnet/client-010/client/transport/codec/AbstractDecoder.cs399
1 files changed, 399 insertions, 0 deletions
diff --git a/qpid/dotnet/client-010/client/transport/codec/AbstractDecoder.cs b/qpid/dotnet/client-010/client/transport/codec/AbstractDecoder.cs
new file mode 100644
index 0000000000..2e9e587407
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+++ b/qpid/dotnet/client-010/client/transport/codec/AbstractDecoder.cs
@@ -0,0 +1,399 @@
+/*
+*
+* 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.
+*
+*/
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Text;
+using org.apache.qpid.transport.util;
+
+namespace org.apache.qpid.transport.codec
+{
+ /// <summary>
+ /// AbstractDecoder
+ /// </summary>
+ public abstract class AbstractDecoder : IDecoder
+ {
+ private readonly Dictionary<Binary, String> str8cache = new Dictionary<Binary, String>();
+
+ protected abstract byte DoGet();
+
+ protected abstract void DoGet(byte[] bytes);
+ public abstract bool HasRemaining();
+
+ protected byte Get()
+ {
+ return DoGet();
+ }
+
+ protected void Get(byte[] bytes)
+ {
+ DoGet(bytes);
+ }
+
+ protected Binary Get(int size)
+ {
+ byte[] bytes = new byte[size];
+ Get(bytes);
+ return new Binary(bytes);
+ }
+
+ protected short Uget()
+ {
+ return (short) (0xFF & Get());
+ }
+
+ public virtual short ReadUint8()
+ {
+ return Uget();
+ }
+
+ public abstract int ReadUint16();
+
+
+ public abstract long ReadUint32();
+
+
+ public int ReadSequenceNo()
+ {
+ return (int) ReadUint32();
+ }
+
+ public virtual long ReadUint64()
+ {
+ long l = 0;
+ for (int i = 0; i < 8; i++)
+ {
+ l |= ((long) (0xFF & Get())) << (56 - i*8);
+ }
+ return l;
+ }
+
+ public abstract short ReadInt8();
+ public abstract int ReadInt16();
+ public abstract long ReadInt32() ;
+ public abstract long ReadInt64();
+ public abstract float ReadFloat() ;
+ public abstract double ReadDouble() ;
+
+ public long ReadDatetime()
+ {
+ return ReadUint64();
+ }
+
+ private static String Decode(byte[] bytes, int offset, int length, Encoding encoding)
+ {
+ return encoding.GetString(bytes, offset, length);
+ }
+
+ private static String Decode(byte[] bytes, Encoding encoding)
+ {
+ return Decode(bytes, 0, bytes.Length, encoding);
+ }
+
+ public String ReadStr8()
+ {
+ short size = ReadUint8();
+ Binary bin = Get(size);
+ String str;
+ if (! str8cache.TryGetValue(bin, out str))
+ {
+ str = Decode(bin.Array(), bin.Offset(), bin.Size(), Encoding.UTF8);
+ str8cache.Add(bin, str);
+ }
+ return str;
+ }
+
+ public String ReadStr16()
+ {
+ int size = ReadUint16();
+ byte[] bytes = new byte[size];
+ Get(bytes);
+ return Decode(bytes, Encoding.UTF8);
+ }
+
+ public byte[] ReadVbin8()
+ {
+ int size = ReadUint8();
+ byte[] bytes = new byte[size];
+ Get(bytes);
+ return bytes;
+ }
+
+ public byte[] ReadVbin16()
+ {
+ int size = ReadUint16();
+ byte[] bytes = new byte[size];
+ Get(bytes);
+ return bytes;
+ }
+
+ public byte[] ReadVbin32()
+ {
+ int size = (int) ReadUint32();
+ byte[] bytes = new byte[size];
+ Get(bytes);
+ return bytes;
+ }
+
+ public RangeSet ReadSequenceSet()
+ {
+ int count = ReadUint16()/8;
+ if (count == 0)
+ {
+ return null;
+ }
+ RangeSet ranges = new RangeSet();
+ for (int i = 0; i < count; i++)
+ {
+ ranges.Add(ReadSequenceNo(), ReadSequenceNo());
+ }
+ return ranges;
+ }
+
+ public RangeSet ReadByteRanges()
+ {
+ throw new Exception("not implemented");
+ }
+
+ public UUID ReadUuid()
+ {
+ long msb = ReadUint64();
+ long lsb = ReadUint64();
+ return new UUID(msb, lsb);
+ }
+
+ public String ReadContent()
+ {
+ throw new Exception("Deprecated");
+ }
+
+ public Struct ReadStruct(int type)
+ {
+ Struct st = Struct.Create(type);
+ int width = st.GetSizeWidth();
+ if (width > 0)
+ {
+ long size = ReadSize(width);
+ if (size == 0)
+ {
+ return null;
+ }
+ }
+ if (type > 0)
+ {
+ int code = ReadUint16();
+ Debug.Assert(code == type);
+ }
+ st.Read(this);
+ return st;
+ }
+
+ public Struct ReadStruct32()
+ {
+ long size = ReadUint32();
+ if (size == 0)
+ {
+ return null;
+ }
+ int type = ReadUint16();
+ Struct result = Struct.Create(type);
+ result.Read(this);
+ return result;
+ }
+
+ public Dictionary<String, Object> ReadMap()
+ {
+ long size = ReadUint32();
+
+ if (size == 0)
+ {
+ return null;
+ }
+
+ long count = ReadUint32();
+
+ Dictionary<String, Object> result = new Dictionary<String, Object>();
+ for (int i = 0; i < count; i++)
+ {
+ String key = ReadStr8();
+ byte code = Get();
+ QpidType t = GetType(code);
+ Object value = Read(t);
+ result.Add(key, value);
+ }
+
+ return result;
+ }
+
+ public List<Object> ReadList()
+ {
+ long size = ReadUint32();
+
+ if (size == 0)
+ {
+ return null;
+ }
+
+ long count = ReadUint32();
+
+ List<Object> result = new List<Object>();
+ for (int i = 0; i < count; i++)
+ {
+ byte code = Get();
+ QpidType t = GetType(code);
+ Object value = Read(t);
+ result.Add(value);
+ }
+ return result;
+ }
+
+ public List<Object> ReadArray()
+ {
+ long size = ReadUint32();
+
+ if (size == 0)
+ {
+ return null;
+ }
+
+ byte code = Get();
+ QpidType t = GetType(code);
+ long count = ReadUint32();
+
+ List<Object> result = new List<Object>();
+ for (int i = 0; i < count; i++)
+ {
+ Object value = Read(t);
+ result.Add(value);
+ }
+ return result;
+ }
+
+ private QpidType GetType(byte code)
+ {
+ return QpidType.get(code);
+ }
+
+ private long ReadSize(QpidType t)
+ {
+ return t.Fixed ? t.Width : ReadSize(t.Width);
+ }
+
+ private long ReadSize(int width)
+ {
+ switch (width)
+ {
+ case 1:
+ return ReadUint8();
+ case 2:
+ return ReadUint16();
+ case 4:
+ return ReadUint32();
+ default:
+ throw new Exception("illegal width: " + width);
+ }
+ }
+
+ private byte[] ReadBytes(QpidType t)
+ {
+ long size = ReadSize(t);
+ byte[] result = new byte[(int) size];
+ Get(result);
+ return result;
+ }
+
+ private Object Read(QpidType t)
+ {
+ switch (t.Code)
+ {
+ case Code.BIN8:
+ case Code.UINT8:
+ return ReadUint8();
+ case Code.INT8:
+ return Get();
+ case Code.CHAR:
+ return (char) Get();
+ case Code.BOOLEAN:
+ return Get() > 0;
+
+ case Code.BIN16:
+ case Code.UINT16:
+ return ReadUint16();
+ case Code.INT16:
+ return (short) ReadUint16();
+
+ case Code.BIN32:
+ case Code.UINT32:
+ return ReadUint32();
+
+ case Code.CHAR_UTF32:
+ case Code.INT32:
+ return (int) ReadUint32();
+
+ case Code.FLOAT:
+ return (float)BitConverter.Int64BitsToDouble(ReadUint32() << 32);
+
+ case Code.BIN64:
+ case Code.UINT64:
+ case Code.INT64:
+ case Code.DATETIME:
+ return ReadUint64();
+
+ case Code.DOUBLE:
+ return BitConverter.Int64BitsToDouble(ReadUint64());
+ case Code.UUID:
+ return ReadUuid();
+ case Code.STR8:
+ return ReadStr8();
+ case Code.STR16:
+ return ReadStr16();
+ case Code.STR8_LATIN:
+ case Code.STR8_UTF16:
+ case Code.STR16_LATIN:
+ case Code.STR16_UTF16:
+ // XXX: need to do character conversion
+ return Encoding.UTF8.GetString(ReadBytes(t));
+
+ case Code.MAP:
+ return ReadMap();
+ case Code.LIST:
+ return ReadList();
+ case Code.ARRAY:
+ return ReadArray();
+ case Code.STRUCT32:
+ return ReadStruct32();
+
+ case Code.BIN40:
+ case Code.DEC32:
+ case Code.BIN72:
+ case Code.DEC64:
+ // XXX: what types are we supposed to use here?
+ return ReadBytes(t);
+
+ case Code.VOID:
+ return null;
+
+ default:
+ return ReadBytes(t);
+ }
+ }
+ }
+}
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