65 lines
1.9 KiB
Java
65 lines
1.9 KiB
Java
/*
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* Copyright 2017 Christian Basler
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package ch.dissem.msgpack;
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import ch.dissem.msgpack.types.*;
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.LinkedList;
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/**
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* Reads MPType object from an {@link InputStream}.
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*/
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public class Reader {
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private LinkedList<MPType.Unpacker<?>> unpackers = new LinkedList<>();
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private static final Reader instance = new Reader();
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private Reader() {
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unpackers.add(new MPNil.Unpacker());
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unpackers.add(new MPBoolean.Unpacker());
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unpackers.add(new MPInteger.Unpacker());
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unpackers.add(new MPFloat.Unpacker());
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unpackers.add(new MPString.Unpacker());
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unpackers.add(new MPBinary.Unpacker());
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unpackers.add(new MPMap.Unpacker(this));
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unpackers.add(new MPArray.Unpacker(this));
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}
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public static Reader getInstance() {
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return instance;
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}
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/**
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* Register your own extensions
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*/
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public void register(MPType.Unpacker<?> unpacker) {
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unpackers.addFirst(unpacker);
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}
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public MPType read(InputStream in) throws IOException {
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int firstByte = in.read();
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for (MPType.Unpacker<?> unpacker : unpackers) {
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if (unpacker.is(firstByte)) {
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return unpacker.unpack(firstByte, in);
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}
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}
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throw new IOException(String.format("Unsupported input, no reader for 0x%02x", firstByte));
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}
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}
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