| /* |
| * |
| * 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; |
| |
| public final class NullType extends AbstractPrimitiveType<Void> |
| { |
| private NullEncoding _nullEncoding; |
| |
| NullType(final EncoderImpl encoder, final DecoderImpl decoder) |
| { |
| _nullEncoding = new NullEncoding(encoder, decoder); |
| encoder.register(Void.class, this); |
| decoder.register(this); |
| } |
| |
| public Class<Void> getTypeClass() |
| { |
| return Void.class; |
| } |
| |
| public NullEncoding getEncoding(final Void val) |
| { |
| return _nullEncoding; |
| } |
| |
| |
| public NullEncoding getCanonicalEncoding() |
| { |
| return _nullEncoding; |
| } |
| |
| public Collection<NullEncoding> getAllEncodings() |
| { |
| return Collections.singleton(_nullEncoding); |
| } |
| |
| public void write() |
| { |
| _nullEncoding.write(); |
| } |
| |
| private class NullEncoding extends FixedSizePrimitiveTypeEncoding<Void> |
| { |
| |
| public NullEncoding(final EncoderImpl encoder, final DecoderImpl decoder) |
| { |
| super(encoder, decoder); |
| } |
| |
| @Override |
| protected int getFixedSize() |
| { |
| return 0; |
| } |
| |
| @Override |
| public byte getEncodingCode() |
| { |
| return EncodingCodes.NULL; |
| } |
| |
| public NullType getType() |
| { |
| return NullType.this; |
| } |
| |
| public void writeValue(final Void val) |
| { |
| } |
| |
| public void writeValue() |
| { |
| } |
| |
| public boolean encodesSuperset(final TypeEncoding<Void> encoding) |
| { |
| return encoding == this; |
| } |
| |
| public Void readValue() |
| { |
| return null; |
| } |
| |
| public void write() |
| { |
| writeConstructor(); |
| } |
| } |
| } |