111 lines
3.1 KiB
Java
111 lines
3.1 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.types;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.nio.ByteBuffer;
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import java.util.Objects;
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import static ch.dissem.msgpack.types.Utils.bytes;
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/**
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* Representation of a msgpack encoded float32 or float64 number.
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*/
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public class MPFloat implements MPType<Double> {
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public enum Precision {FLOAT32, FLOAT64}
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private final double value;
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private final Precision precision;
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public MPFloat(float value) {
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this.value = value;
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this.precision = Precision.FLOAT32;
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}
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public MPFloat(double value) {
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this.value = value;
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this.precision = Precision.FLOAT64;
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}
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@Override
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public Double getValue() {
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return value;
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}
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public Precision getPrecision() {
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return precision;
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}
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public void pack(OutputStream out) throws IOException {
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switch (precision) {
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case FLOAT32:
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out.write(0xCA);
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out.write(ByteBuffer.allocate(4).putFloat((float) value).array());
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break;
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case FLOAT64:
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out.write(0xCB);
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out.write(ByteBuffer.allocate(8).putDouble(value).array());
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break;
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default:
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throw new IllegalArgumentException("Unknown precision: " + precision);
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}
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}
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@Override
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public boolean equals(Object o) {
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if (this == o) return true;
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if (o == null || getClass() != o.getClass()) return false;
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MPFloat mpFloat = (MPFloat) o;
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return Double.compare(mpFloat.value, value) == 0;
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}
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@Override
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public int hashCode() {
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return Objects.hash(value);
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}
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@Override
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public String toString() {
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return String.valueOf(value);
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}
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@Override
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public String toJson() {
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return String.valueOf(value);
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}
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public static class Unpacker implements MPType.Unpacker<MPFloat> {
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public boolean is(int firstByte) {
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return firstByte == 0xCA || firstByte == 0xCB;
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}
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public MPFloat unpack(int firstByte, InputStream in) throws IOException {
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switch (firstByte) {
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case 0xCA:
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return new MPFloat(bytes(in, 4).getFloat());
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case 0xCB:
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return new MPFloat(bytes(in, 8).getDouble());
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default:
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throw new IllegalArgumentException(String.format("Unexpected first byte 0x%02x", firstByte));
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}
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}
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}
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}
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