Java ByteBuffer.getUnsignedInt方法代码示例

import org.apache.mina.common.ByteBuffer; //导入方法依赖的package包/类
public static String readLongString(ByteBuffer buffer)
{
    long length = buffer.getUnsignedInt();
    if (length == 0)
    {
        return "";
    }
    else
    {
        // this may seem rather odd to declare two array but testing has shown
        // that constructing a string from a byte array is 5 (five) times slower
        // than constructing one from a char array.
        // this approach here is valid since we know that all the chars are
        // ASCII (0-127)
        byte[] stringBytes = new byte[(int) length];
        buffer.get(stringBytes, 0, (int) length);
        char[] stringChars = new char[(int) length];
        for (int i = 0; i < stringChars.length; i++)
        {
            stringChars[i] = (char) stringBytes[i];
        }

        return new String(stringChars);
    }
}
 

import org.apache.mina.common.ByteBuffer; //导入方法依赖的package包/类
public static FieldTable readFieldTable(ByteBuffer buffer) throws AMQFrameDecodingException
{
    long length = buffer.getUnsignedInt();
    if (length == 0)
    {
        return null;
    }
    else
    {
        return FieldTableFactory.newFieldTable(buffer, length);
    }
}
 

import org.apache.mina.common.ByteBuffer; //导入方法依赖的package包/类
public static byte[] readLongstr(ByteBuffer buffer)
{
    long length = buffer.getUnsignedInt();
    if (length == 0)
    {
        return null;
    }
    else
    {
        byte[] result = new byte[(int) length];
        buffer.get(result);

        return result;
    }
}
 

import org.apache.mina.common.ByteBuffer; //导入方法依赖的package包/类
public static byte[] readBytes(ByteBuffer buffer)
{
    long length = buffer.getUnsignedInt();
    if (length == 0)
    {
        return null;
    }
    else
    {
        byte[] dataBytes = new byte[(int)length];
        buffer.get(dataBytes, 0, (int)length);

        return dataBytes;
    }
}
 

import org.apache.mina.common.ByteBuffer; //导入方法依赖的package包/类
public void testwriteBuffer()
{
    byte[] bytes = { 99, 98, 97, 96, 95 };

    FieldTable table = new FieldTable();
    table.setBoolean("bool", true);
    table.setByte("byte", Byte.MAX_VALUE);

    table.setBytes("bytes", bytes);
    table.setChar("char", 'c');
    table.setDouble("double", Double.MAX_VALUE);
    table.setFloat("float", Float.MAX_VALUE);
    table.setInteger("int", Integer.MAX_VALUE);
    table.setLong("long", Long.MAX_VALUE);
    table.setShort("short", Short.MAX_VALUE);
    table.setString("string", "hello");
    table.setString("null-string", null);

    final ByteBuffer buffer = ByteBuffer.allocate((int) table.getEncodedSize() + 4); // FIXME XXX: Is cast a problem?

    table.writeToBuffer(buffer);

    buffer.flip();

    long length = buffer.getUnsignedInt();

    FieldTable table2 = new FieldTable(buffer, length);

    Assert.assertEquals((Boolean) true, table2.getBoolean("bool"));
    Assert.assertEquals((Byte) Byte.MAX_VALUE, table2.getByte("byte"));
    assertBytesEqual(bytes, table2.getBytes("bytes"));
    Assert.assertEquals((Character) 'c', table2.getCharacter("char"));
    Assert.assertEquals(Double.MAX_VALUE, table2.getDouble("double"));
    Assert.assertEquals(Float.MAX_VALUE, table2.getFloat("float"));
    Assert.assertEquals((Integer) Integer.MAX_VALUE, table2.getInteger("int"));
    Assert.assertEquals((Long) Long.MAX_VALUE, table2.getLong("long"));
    Assert.assertEquals((Short) Short.MAX_VALUE, table2.getShort("short"));
    Assert.assertEquals("hello", table2.getString("string"));
    Assert.assertEquals(null, table2.getString("null-string"));
}
 

import org.apache.mina.common.ByteBuffer; //导入方法依赖的package包/类
protected long readUnsignedInteger(ByteBuffer buffer)
{
    return buffer.getUnsignedInt();
}
 

import org.apache.mina.common.ByteBuffer; //导入方法依赖的package包/类
public AMQFrame createAndPopulateFrame(AMQMethodBodyFactory methodBodyFactory, ByteBuffer in)
    throws AMQFrameDecodingException, AMQProtocolVersionException
{
    final byte type = in.get();

    BodyFactory bodyFactory;
    if (type == AMQMethodBody.TYPE)
    {
        bodyFactory = methodBodyFactory;
    }
    else
    {
        bodyFactory = _bodiesSupported[type];
    }

    if (bodyFactory == null)
    {
        throw new AMQFrameDecodingException(null, "Unsupported frame type: " + type, null);
    }

    final int channel = in.getUnsignedShort();
    final long bodySize = in.getUnsignedInt();

    // bodySize can be zero
    if ((channel < 0) || (bodySize < 0))
    {
        throw new AMQFrameDecodingException(null, "Undecodable frame: type = " + type + " channel = " + channel
            + " bodySize = " + bodySize, null);
    }

    AMQFrame frame = new AMQFrame(in, channel, bodySize, bodyFactory);

    byte marker = in.get();
    if ((marker & 0xFF) != 0xCE)
    {
        throw new AMQFrameDecodingException(null, "End of frame marker not found. Read " + marker + " length=" + bodySize
            + " type=" + type, null);
    }

    return frame;
}