- com
- softwareag
- um
- modules
- io
- PrimitiveTypeInputStream
This class implements DataInput functions. More...
Inherits DataInput.
Public Member Functions | |
| int | available () throws IOException |
| Returns the number of bytes available in the underlying Streams. More... | |
| void | close () throws IOException |
| Closes the underlying stream and makes it unavailable for any further functions. More... | |
| PrimitiveTypeInputStream (InputStream is) throws IOException | |
| Creates an instance of the class using the supplied InputStream. More... | |
| boolean | readBoolean () throws IOException |
Reads one input byte and returns true if that byte is nonzero, false if that byte is zero. More... | |
| byte | readByte () throws IOException |
| Reads and returns one input byte. More... | |
| char | readChar () throws IOException |
Reads two input bytes and returns a char value. More... | |
| double | readDouble () throws IOException |
Reads eight input bytes and returns a double value. More... | |
| float | readFloat () throws IOException |
Reads four input bytes and returns a float value. More... | |
| void | readFully (byte[] buffer) throws IOException |
Reads some bytes from an input stream and stores them into the buffer array b. More... | |
| void | readFully (byte[] buffer, int offset, int length) throws IOException |
Reads len bytes from an input stream. More... | |
| int | readInt () throws IOException |
Reads four input bytes and returns an int value. More... | |
| String | readLine () throws IOException |
| This is not supported. More... | |
| long | readLong () throws IOException |
Reads eight input bytes and returns a long value. More... | |
| short | readShort () throws IOException |
Reads two input bytes and returns a short value. More... | |
| int | readUnsignedByte () throws IOException |
Reads one input byte, zero-extends it to type int, and returns the result, which is therefore in the range 0 through 255. More... | |
| int | readUnsignedShort () throws IOException |
Reads two input bytes and returns an int value in the range 0 through 65535. More... | |
| String | readUTF () throws IOException |
| Reads a UTF-8 encoded string from the input stream. More... | |
| int | skipBytes (int skip) throws IOException |
Makes an attempt to skip over n bytes of data from the input stream, discarding the skipped bytes. More... | |
This class implements DataInput functions.
| com.softwareag.um.modules.io.PrimitiveTypeInputStream.PrimitiveTypeInputStream | ( | InputStream | is | ) | throws IOException |
Creates an instance of the class using the supplied InputStream.
| IOException | if unable to construct the object due to the Input Stream being closed |
| int com.softwareag.um.modules.io.PrimitiveTypeInputStream.available | ( | ) | throws IOException |
Returns the number of bytes available in the underlying Streams.
| void com.softwareag.um.modules.io.PrimitiveTypeInputStream.close | ( | ) | throws IOException |
Closes the underlying stream and makes it unavailable for any further functions.
| IOException | if the stream is already closed |
| boolean com.softwareag.um.modules.io.PrimitiveTypeInputStream.readBoolean | ( | ) | throws IOException |
Reads one input byte and returns true if that byte is nonzero, false if that byte is zero.
This method is suitable for reading the byte written by the writeBoolean method of interface DataOutput.
boolean value read. | IOException | if an I/O error occurs. |
| byte com.softwareag.um.modules.io.PrimitiveTypeInputStream.readByte | ( | ) | throws IOException |
Reads and returns one input byte.
The byte is treated as a signed value in the range -128 through 127, inclusive. This method is suitable for reading the byte written by the writeByte method of interface DataOutput.
| IOException | if an I/O error occurs. |
| char com.softwareag.um.modules.io.PrimitiveTypeInputStream.readChar | ( | ) | throws IOException |
Reads two input bytes and returns a char value.
Let a be the first byte read and b be the second byte. The value returned is:
(char)((a << 8) | (b & 0xff))
This method is suitable for reading bytes written by the writeChar method of interface DataOutput.
char value read. | IOException | if an I/O error occurs. |
| double com.softwareag.um.modules.io.PrimitiveTypeInputStream.readDouble | ( | ) | throws IOException |
Reads eight input bytes and returns a double value.
It does this by first constructing a long value in exactly the manner of the readlong method, then converting this long value to a double in exactly the manner of the method Double.longBitsToDouble. This method is suitable for reading bytes written by the writeDouble method of interface DataOutput.
double value read. | IOException | if an I/O error occurs. |
| float com.softwareag.um.modules.io.PrimitiveTypeInputStream.readFloat | ( | ) | throws IOException |
Reads four input bytes and returns a float value.
It does this by first constructing an int value in exactly the manner of the readInt method, then converting this int value to a float in exactly the manner of the method Float.intBitsToFloat. This method is suitable for reading bytes written by the writeFloat method of interface DataOutput.
float value read. | IOException | if an I/O error occurs. |
| void com.softwareag.um.modules.io.PrimitiveTypeInputStream.readFully | ( | byte[] | buffer | ) | throws IOException |
Reads some bytes from an input stream and stores them into the buffer array b.
The number of bytes read is equal to the length of b.
This method blocks until one of the following conditions occurs:
b.length bytes of input data are available, in which case a normal return is made. EOFException is thrown. IOException other than EOFException is thrown. If b is null, a NullPointerException is thrown. If b.length is zero, then no bytes are read. Otherwise, the first byte read is stored into element b[0], the next one into b[1], and so on. If an exception is thrown from this method, then it may be that some but not all bytes of b have been updated with data from the input stream.
| buffer | the buffer into which the data is read. |
| IOException | if an I/O error occurs. |
| void com.softwareag.um.modules.io.PrimitiveTypeInputStream.readFully | ( | byte[] | buffer, |
| int | offset, | ||
| int | length | ||
| ) | throws IOException |
Reads len bytes from an input stream.
This method blocks until one of the following conditions occurs:
len bytes of input data are available, in which case a normal return is made. EOFException is thrown. IOException other than EOFException is thrown. If b is null, a NullPointerException is thrown. If off is negative, or len is negative, or off+len is greater than the length of the array b, then an IndexOutOfBoundsException is thrown. If len is zero, then no bytes are read. Otherwise, the first byte read is stored into element b[off], the next one into b[off+1], and so on. The number of bytes read is, at most, equal to len.
| buffer | the buffer into which the data is read. |
| offset | an int specifying the offset into the data. |
| length | an int specifying the number of bytes to read. |
| IOException | if an I/O error occurs. |
| int com.softwareag.um.modules.io.PrimitiveTypeInputStream.readInt | ( | ) | throws IOException |
Reads four input bytes and returns an int value.
Let a-d be the first through fourth bytes read. The value returned is:
(((a & 0xff) << 24) | ((b & 0xff) << 16) |
 ((c & 0xff) << 8) | (d & 0xff))
This method is suitable for reading bytes written by the writeInt method of interface DataOutput.
int value read. | IOException | if an I/O error occurs. |
| String com.softwareag.um.modules.io.PrimitiveTypeInputStream.readLine | ( | ) | throws IOException |
This is not supported.
| long com.softwareag.um.modules.io.PrimitiveTypeInputStream.readLong | ( | ) | throws IOException |
Reads eight input bytes and returns a long value.
Let a-h be the first through eighth bytes read. The value returned is:
(((long)(a & 0xff) << 56) |
((long)(b & 0xff) << 48) |
((long)(c & 0xff) << 40) |
((long)(d & 0xff) << 32) |
((long)(e & 0xff) << 24) |
((long)(f & 0xff) << 16) |
((long)(g & 0xff) << 8) |
((long)(h & 0xff)))
This method is suitable for reading bytes written by the writeLong method of interface DataOutput.
long value read. | IOException | if an I/O error occurs. |
| short com.softwareag.um.modules.io.PrimitiveTypeInputStream.readShort | ( | ) | throws IOException |
Reads two input bytes and returns a short value.
Let a be the first byte read and b be the second byte. The value returned is:
(short)((a << 8) | (b & 0xff))
This method is suitable for reading the bytes written by the writeShort method of interface DataOutput.
| IOException | if an I/O error occurs. |
| int com.softwareag.um.modules.io.PrimitiveTypeInputStream.readUnsignedByte | ( | ) | throws IOException |
Reads one input byte, zero-extends it to type int, and returns the result, which is therefore in the range 0 through 255.
This method is suitable for reading the byte written by the writeByte method of interface DataOutput if the argument to writeByte was intended to be a value in the range 0 through 255.
| IOException | if an I/O error occurs. |
| int com.softwareag.um.modules.io.PrimitiveTypeInputStream.readUnsignedShort | ( | ) | throws IOException |
Reads two input bytes and returns an int value in the range 0 through 65535.
Let a be the first byte read and b be the second byte. The value returned is:
(((a & 0xff) << 8) | (b & 0xff))
This method is suitable for reading the bytes written by the writeShort method of interface DataOutput if the argument to writeShort was intended to be a value in the range 0 through 65535.
| IOException | if an I/O error occurs. |
| String com.softwareag.um.modules.io.PrimitiveTypeInputStream.readUTF | ( | ) | throws IOException |
Reads a UTF-8 encoded string from the input stream.
The string must have been written using the writeUTF() method
| IOException | if I/O error has occurred |
| int com.softwareag.um.modules.io.PrimitiveTypeInputStream.skipBytes | ( | int | skip | ) | throws IOException |
Makes an attempt to skip over n bytes of data from the input stream, discarding the skipped bytes.
However, it may skip over some smaller number of bytes, possibly zero. This may result from any of a number of conditions; reaching end of file before n bytes have been skipped is only one possibility. This method never throws an EOFException. The actual number of bytes skipped is returned.
| skip | the number of bytes to be skipped. |
| IOException | if an I/O error occurs. |