| /* |
| * |
| * 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; |
| |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.Map; |
| import org.apache.qpid.proton.amqp.UnsignedLong; |
| |
| abstract public class AbstractDescribedType<T,M> implements AMQPType<T> |
| { |
| private final DecoderImpl _decoder; |
| private final EncoderImpl _encoder; |
| private final Map<TypeEncoding<M>, TypeEncoding<T>> _encodings = new HashMap<TypeEncoding<M>, TypeEncoding<T>>(); |
| |
| public AbstractDescribedType(EncoderImpl encoder) |
| { |
| _encoder = encoder; |
| _decoder = encoder.getDecoder(); |
| } |
| |
| abstract protected UnsignedLong getDescriptor(); |
| |
| public EncoderImpl getEncoder() |
| { |
| return _encoder; |
| } |
| |
| public DecoderImpl getDecoder() |
| { |
| return _decoder; |
| } |
| |
| public TypeEncoding<T> getEncoding(final T val) |
| { |
| M asUnderlying = wrap(val); |
| TypeEncoding<M> underlyingEncoding = _encoder.getType(asUnderlying).getEncoding(asUnderlying); |
| TypeEncoding<T> encoding = _encodings.get(underlyingEncoding); |
| if(encoding == null) |
| { |
| encoding = new DynamicDescribedTypeEncoding(underlyingEncoding); |
| _encodings.put(underlyingEncoding, encoding); |
| } |
| |
| return encoding; |
| } |
| |
| abstract protected M wrap(T val); |
| |
| public TypeEncoding<T> getCanonicalEncoding() |
| { |
| return null; |
| } |
| |
| public Collection<TypeEncoding<T>> getAllEncodings() |
| { |
| Collection values = _encodings.values(); |
| Collection unmodifiable = Collections.unmodifiableCollection(values); |
| return (Collection<TypeEncoding<T>>) unmodifiable; |
| } |
| |
| public void write(final T val) |
| { |
| TypeEncoding<T> encoding = getEncoding(val); |
| encoding.writeConstructor(); |
| encoding.writeValue(val); |
| } |
| |
| private class DynamicDescribedTypeEncoding implements TypeEncoding<T> |
| { |
| private final TypeEncoding<M> _underlyingEncoding; |
| private final TypeEncoding<UnsignedLong> _descriptorType; |
| private final int _constructorSize; |
| |
| |
| public DynamicDescribedTypeEncoding(final TypeEncoding<M> underlyingEncoding) |
| { |
| _underlyingEncoding = underlyingEncoding; |
| _descriptorType = _encoder.getType(getDescriptor()).getEncoding(getDescriptor()); |
| _constructorSize = 1 + _descriptorType.getConstructorSize() |
| + _descriptorType.getValueSize(getDescriptor()) |
| + _underlyingEncoding.getConstructorSize(); |
| } |
| |
| public AMQPType<T> getType() |
| { |
| return AbstractDescribedType.this; |
| } |
| |
| public void writeConstructor() |
| { |
| _encoder.writeRaw(EncodingCodes.DESCRIBED_TYPE_INDICATOR); |
| _descriptorType.writeConstructor(); |
| _descriptorType.writeValue(getDescriptor()); |
| _underlyingEncoding.writeConstructor(); |
| } |
| |
| public int getConstructorSize() |
| { |
| return _constructorSize; |
| } |
| |
| public void writeValue(final T val) |
| { |
| _underlyingEncoding.writeValue(wrap(val)); |
| } |
| |
| public int getValueSize(final T val) |
| { |
| return _underlyingEncoding.getValueSize(wrap(val)); |
| } |
| |
| public boolean isFixedSizeVal() |
| { |
| return _underlyingEncoding.isFixedSizeVal(); |
| } |
| |
| public boolean encodesSuperset(final TypeEncoding<T> encoding) |
| { |
| return (getType() == encoding.getType()) |
| && (_underlyingEncoding.encodesSuperset(((DynamicDescribedTypeEncoding)encoding) |
| ._underlyingEncoding)); |
| } |
| |
| @Override |
| public boolean encodesJavaPrimitive() |
| { |
| return false; |
| } |
| |
| } |
| } |