Java: замена DataInputStream для порядка следования байтов

Ниже приведен мой код, который заменяет DataInputStream для переноса InputStream, но предоставляет дополнительные методы для чтения типов данных с прямым порядком байтов в дополнение к обычным методам, считывающим типы с прямым порядком байтов. Не стесняйтесь использовать его, если хотите.

У меня есть несколько оговорок следующим образом. Обратите внимание на методы, которые не изменяют функциональность (функции, которые считывают типы с прямым порядком байтов). Я никак не мог бы реализовать DataInputStream в качестве базового класса и использовать его методы, такие как read(), readInt(), readChar() и т. д.?

Моя иерархия классов здесь кажется немного странной. Это уместно?

Нужна ли какая-либо из этих других типов, таких как readUTF() или readLine(), версия с прямым порядком байтов? Или это субъективно для конкретных программ?

Как Java хранит логические типы? Это также субъективно для порядка следования байтов?

Спасибо, что удовлетворили мое любопытство :)

import java.io.*;

/**
 * Replacement for a DataInputStream that provides both little and big endian reading capabilities for convenience without need to implement a ByteBuffer
 * @author Bill ([email protected])
 */
public class EndianInputStream extends InputStream implements DataInput {
    private DataInputStream dataInStream;
    private InputStream inStream;
    private byte byteBuffer[];

    /**
     * Constructor to wrap InputStream for little and big endian data
     * @param refInStream Inputstream to wrap
     */
    public EndianInputStream(InputStream refInStream) {
        inStream = refInStream;
        dataInStream = new DataInputStream(inStream);
        byteBuffer = new byte[8]; // Largest data type is 64-bits (8 bytes)
    }

    @Override
    public int available() throws IOException {
        return dataInStream.available();
    }

    @Override
    public final int read(byte refBuffer[], int offset, int readLen) throws IOException {
        return inStream.read(refBuffer, offset, readLen);
    }

    @Override
    public int read() throws IOException {
        return inStream.read();
    }

    @Override
    public final int readUnsignedByte() throws IOException {
        return dataInStream.readUnsignedByte();
    }

    @Deprecated
    @Override
    public final String readLine() throws IOException {
        return dataInStream.readLine();
    }

    @Override
    public final String readUTF() throws IOException {
        return dataInStream.readUTF();
    }

    @Override
    public final void close() throws IOException {
        dataInStream.close();
    }

    @Override
    public final void readFully(byte refBuffer[]) throws IOException {
        dataInStream.readFully(refBuffer, 0, refBuffer.length);
    }

    @Override
    public final void readFully(byte refBuffer[], int offset, int readLen) throws IOException {
        dataInStream.readFully(refBuffer, offset, readLen);
    }

    @Override
    public final int skipBytes(int n) throws IOException {
        return dataInStream.skipBytes(n);
    }

    @Override
    public final boolean readBoolean() throws IOException {
        return dataInStream.readBoolean();
    }

    @Override
    public final byte readByte() throws IOException {
        return dataInStream.readByte();
    }

    @Override
    public final float readFloat() throws IOException {
        return Float.intBitsToFloat(readInt());
    }

    @Override
    public final double readDouble() throws IOException {
        return Double.longBitsToDouble(readLong());
    }

    @Override
    public final short readShort() throws IOException {
        return dataInStream.readShort();
    }

    @Override
    public final int readUnsignedShort() throws IOException {
        return dataInStream.readUnsignedShort();
    }

    @Override
    public final long readLong() throws IOException {
        return dataInStream.readLong();
    }

    @Override
    public final char readChar() throws IOException {
        return dataInStream.readChar();
    }

    @Override
    public final int readInt() throws IOException {
        return dataInStream.readInt();
    }

    /**
     * Reads floating point type stored in little endian (see readFloat() for big endian)
     * @return float value translated from little endian
     * @throws IOException if an IO error occurs
     */
    public final float readLittleFloat() throws IOException {
        return Float.intBitsToFloat(readLittleInt());
    }    

    /**
     * Reads double precision floating point type stored in little endian (see readDouble() for big endian)
     * @return double precision float value translated from little endian
     * @throws IOException if an IO error occurs
     */    
    public final double readLittleDouble() throws IOException {
        return Double.longBitsToDouble(readLittleLong());
    }

    /**
     * Reads short type stored in little endian (see readShort() for big endian)
     * @return short value translated from little endian
     * @throws IOException if an IO error occurs
     */    
    public final short readLittleShort() throws IOException {
    dataInStream.readFully(byteBuffer, 0, 2);
    return (short)((byteBuffer[1] & 0xff) << 8 | (byteBuffer[0] & 0xff));
    }

    /**
     * Reads char (16-bits) type stored in little endian (see readChar() for big endian)
     * @return char value translated from little endian
     * @throws IOException if an IO error occurs
     */    
    public final char readLittleChar() throws IOException {
        dataInStream.readFully(byteBuffer, 0, 2);
        return (char)((byteBuffer[1] & 0xff) << 8 | (byteBuffer[0] & 0xff));
    }    

    /**
     * Reads integer type stored in little endian (see readInt() for big endian)
     * @return integer value translated from little endian
     * @throws IOException if an IO error occurs
     */        
    public final int readLittleInt() throws IOException {
        dataInStream.readFully(byteBuffer, 0, 4);
        return (byteBuffer[3]) << 24 | (byteBuffer[2] & 0xff) << 16 |
            (byteBuffer[1] & 0xff) << 8 | (byteBuffer[0] & 0xff);
    }

    /**
     * Reads long type stored in little endian (see readLong() for big endian)
     * @return long value translated from little endian
     * @throws IOException if an IO error occurs
     */        
    public final long readLittleLong() throws IOException {
        dataInStream.readFully(byteBuffer, 0, 8);
        return (long)(byteBuffer[7]) << 56 | (long)(byteBuffer[6]&0xff) << 48 |
            (long)(byteBuffer[5] & 0xff) << 40 | (long)(byteBuffer[4] & 0xff) << 32 |
            (long)(byteBuffer[3] & 0xff) << 24 | (long)(byteBuffer[2] & 0xff) << 16 |
            (long)(byteBuffer[1] & 0xff) <<  8 | (long)(byteBuffer[0] & 0xff);
    }

    /**
     * Reads unsigned short type stored in little endian (see readUnsignedShort() for big endian)
     * @return integer value representing unsigned short value translated from little endian
     * @throws IOException if an IO error occurs
     */        
    public final int readLittleUnsignedShort() throws IOException {
        dataInStream.readFully(byteBuffer, 0, 2);
        return ((byteBuffer[1] & 0xff) << 8 | (byteBuffer[0] & 0xff));
    }
}