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java.lang.Objectjavax.imageio.stream.ImageInputStreamImpl
, DataOutput , ImageInputStream , ImageOutputStream , FileImageOutputStream , MemoryCacheImageOutputStream public abstract class ImageOutputStreamImpl
An abstract class implementing the ImageOutputStream interface.
This class is designed to reduce the number of methods that must
be implemented by subclasses.
| Field Summary |
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| Fields inherited from class javax.imageio.stream.ImageInputStreamImpl |
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bitOffset |
| Constructor Summary | |
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ImageOutputStreamImpl
Constructs an ImageOutputStreamImpl. |
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| Method Summary | |
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protected void |
flushBits
If the bit offset is non-zero, forces the remaining bits in the current byte to 0 and advances the stream position by one. |
void |
write
Writes to the output stream all the bytes in array b. |
abstract void |
write
Writes len bytes from array
b, in order, to
the output stream. |
abstract void |
write
Writes to the output stream the eight low-order bits of the argument b. |
void |
writeBit
Writes a single bit, given by the least significant bit of the argument, to the stream at the current bit offset within the current byte position. |
void |
writeBits
Writes a sequence of bits, given by the numBits
least significant bits of the bits argument in
left-to-right order, to the stream at the current bit offset
within the current byte position. |
void |
writeBoolean
Writes a boolean value to this output stream. |
void |
writeByte
Writes to the output stream the eight low- order bits of the argument v. |
void |
writeBytes
Writes a string to the output stream. |
void |
writeChar
Writes a char value, which
is comprised of two bytes, to the
output stream. |
void |
writeChars
Writes a sequence of chars to the stream at the current position. |
void |
writeChars
Writes every character in the string s,
to the output stream, in order,
two bytes per character. |
void |
writeDouble
Writes a double value,
which is comprised of eight bytes, to the output stream. |
void |
writeDoubles
Writes a sequence of doubles to the stream at the current position. |
void |
writeFloat
Writes a float value,
which is comprised of four bytes, to the output stream. |
void |
writeFloats
Writes a sequence of floats to the stream at the current position. |
void |
writeInt
Writes an int value, which is
comprised of four bytes, to the output stream. |
void |
writeInts
Writes a sequence of ints to the stream at the current position. |
void |
writeLong
Writes a long value, which is
comprised of eight bytes, to the output stream. |
void |
writeLongs
Writes a sequence of longs to the stream at the current position. |
void |
writeShort
Writes two bytes to the output stream to represent the value of the argument. |
void |
writeShorts
Writes a sequence of shorts to the stream at the current position. |
void |
writeUTF
Writes two bytes of length information to the output stream, followed by the modified UTF-8 representation of every character in the string s. |
| Methods inherited from class javax.imageio.stream.ImageInputStreamImpl |
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checkClosed |
| Methods inherited from class java.lang.Object |
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clone |
| Methods inherited from interface javax.imageio.stream.ImageOutputStream |
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flushBefore |
| Methods inherited from interface javax.imageio.stream.ImageInputStream |
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close |
| Constructor Detail |
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public ImageOutputStreamImpl()
ImageOutputStreamImpl.
| Method Detail |
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public abstract void write(int b)
throws IOException
DataOutput b.
The 24 high-order bits of b
are ignored.
write in interface DataOutput write in interface ImageOutputStream b - the byte to be written.
IOException - if an I/O error occurs.
public void write(byte[] b)
throws IOException
DataOutput b.
If b is null,
a NullPointerException is thrown.
If b.length is zero, then
no bytes are written. Otherwise, the byte
b[0] is written first, then
b[1], and so on; the last byte
written is b[b.length-1].
write in interface DataOutput write in interface ImageOutputStream b - the data.
IOException - if an I/O error occurs.
public abstract void write(byte[] b,
int off,
int len)
throws IOException
DataOutput len bytes from array
b, in order, to
the output stream. 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 written. Otherwise, the
byte b[off] is written first,
then b[off+1], and so on; the
last byte written is b[off+len-1].
write in interface DataOutput write in interface ImageOutputStream b - the data.off - the start offset in the data.len - the number of bytes to write.
IOException - if an I/O error occurs.
public void writeBoolean(boolean v)
throws IOException
DataOutput boolean value to this output stream.
If the argument v
is true, the value (byte)1
is written; if v is false,
the value (byte)0 is written.
The byte written by this method may
be read by the readBoolean
method of interface DataInput,
which will then return a boolean
equal to v.
writeBoolean in interface DataOutput writeBoolean in interface ImageOutputStream v - the boolean to be written.
IOException - if an I/O error occurs.
public void writeByte(int v)
throws IOException
DataOutput v.
The 24 high-order bits of v
are ignored. (This means that writeByte
does exactly the same thing as write
for an integer argument.) The byte written
by this method may be read by the readByte
method of interface DataInput,
which will then return a byte
equal to (byte)v.
writeByte in interface DataOutput writeByte in interface ImageOutputStream v - the byte value to be written.
IOException - if an I/O error occurs.
public void writeShort(int v)
throws IOException
DataOutput
(byte)(0xff & (v >> 8))
(byte)(0xff & v)
The bytes written by this method may be
read by the readShort method
of interface DataInput , which
will then return a short equal
to (short)v.
writeShort in interface DataOutput writeShort in interface ImageOutputStream v - the short value to be written.
IOException - if an I/O error occurs.
public void writeChar(int v)
throws IOException
DataOutput char value, which
is comprised of two bytes, to the
output stream.
The byte values to be written, in the order
shown, are:
(byte)(0xff & (v >> 8))
(byte)(0xff & v)
The bytes written by this method may be
read by the readChar method
of interface DataInput , which
will then return a char equal
to (char)v.
writeChar in interface DataOutput writeChar in interface ImageOutputStream v - the char value to be written.
IOException - if an I/O error occurs.ImageOutputStream.writeShort(int)
public void writeInt(int v)
throws IOException
DataOutput int value, which is
comprised of four bytes, to the output stream.
The byte values to be written, in the order
shown, are:
(byte)(0xff & (v >> 24))
(byte)(0xff & (v >> 16))
(byte)(0xff & (v >> 8))
(byte)(0xff & v)
The bytes written by this method may be read
by the readInt method of interface
DataInput , which will then
return an int equal to v.
writeInt in interface DataOutput writeInt in interface ImageOutputStream v - the int value to be written.
IOException - if an I/O error occurs.
public void writeLong(long v)
throws IOException
DataOutput long value, which is
comprised of eight bytes, to the output stream.
The byte values to be written, in the order
shown, are:
(byte)(0xff & (v >> 56))
(byte)(0xff & (v >> 48))
(byte)(0xff & (v >> 40))
(byte)(0xff & (v >> 32))
(byte)(0xff & (v >> 24))
(byte)(0xff & (v >> 16))
(byte)(0xff & (v >> 8))
(byte)(0xff & v)
The bytes written by this method may be
read by the readLong method
of interface DataInput , which
will then return a long equal
to v.
writeLong in interface DataOutput writeLong in interface ImageOutputStream v - the long value to be written.
IOException - if an I/O error occurs.
public void writeFloat(float v)
throws IOException
DataOutput float value,
which is comprised of four bytes, to the output stream.
It does this as if it first converts this
float value to an int
in exactly the manner of the Float.floatToIntBits
method and then writes the int
value in exactly the manner of the writeInt
method. The bytes written by this method
may be read by the readFloat
method of interface DataInput,
which will then return a float
equal to v.
writeFloat in interface DataOutput writeFloat in interface ImageOutputStream v - the float value to be written.
IOException - if an I/O error occurs.
public void writeDouble(double v)
throws IOException
DataOutput double value,
which is comprised of eight bytes, to the output stream.
It does this as if it first converts this
double value to a long
in exactly the manner of the Double.doubleToLongBits
method and then writes the long
value in exactly the manner of the writeLong
method. The bytes written by this method
may be read by the readDouble
method of interface DataInput,
which will then return a double
equal to v.
writeDouble in interface DataOutput writeDouble in interface ImageOutputStream v - the double value to be written.
IOException - if an I/O error occurs. public void writeBytes(String
DataOutput s, taken in order, one byte
is written to the output stream. If
s is null, a NullPointerException
is thrown. If s.length
is zero, then no bytes are written. Otherwise,
the character s[0] is written
first, then s[1], and so on;
the last character written is s[s.length-1].
For each character, one byte is written,
the low-order byte, in exactly the manner
of the writeByte method . The
high-order eight bits of each character
in the string are ignored.
writeBytes in interface DataOutput writeBytes in interface ImageOutputStream s - the string of bytes to be written.
IOException - if an I/O error occurs. public void writeChars(String
DataOutput s,
to the output stream, in order,
two bytes per character. If s
is null, a NullPointerException
is thrown. If s.length
is zero, then no characters are written.
Otherwise, the character s[0]
is written first, then s[1],
and so on; the last character written is
s[s.length-1]. For each character,
two bytes are actually written, high-order
byte first, in exactly the manner of the
writeChar method.
writeChars in interface DataOutput writeChars in interface ImageOutputStream s - the string value to be written.
IOException - if an I/O error occurs. public void writeUTF(String
DataOutput s.
If s is null,
a NullPointerException is thrown.
Each character in the string s
is converted to a group of one, two, or
three bytes, depending on the value of the
character.
If a character c
is in the range \u0001 through
\u007f, it is represented
by one byte:
(byte)c
If a character c is \u0000
or is in the range \u0080
through \u07ff, then it is
represented by two bytes, to be written
in the order shown:
(byte)(0xc0 | (0x1f & (c >> 6)))
(byte)(0x80 | (0x3f & c))
If a character
c is in the range \u0800
through uffff, then it is
represented by three bytes, to be written
in the order shown:
(byte)(0xe0 | (0x0f & (c >> 12)))
(byte)(0x80 | (0x3f & (c >> 6)))
(byte)(0x80 | (0x3f & c))
First,
the total number of bytes needed to represent
all the characters of s is
calculated. If this number is larger than
65535, then a UTFDataFormatException
is thrown. Otherwise, this length is written
to the output stream in exactly the manner
of the writeShort method;
after this, the one-, two-, or three-byte
representation of each character in the
string s is written.
The
bytes written by this method may be read
by the readUTF method of interface
DataInput , which will then
return a String equal to s.
writeUTF in interface DataOutput writeUTF in interface ImageOutputStream s - the string value to be written.
IOException - if an I/O error occurs.
public void writeShorts(short[] s,
int off,
int len)
throws IOException
ImageOutputStream len is 0, nothing is written.
The short s[off] is written first, then the short
s[off + 1], and so on. The byte order of the
stream is used to determine the order in which the individual
bytes are written.
If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.
writeShorts in interface ImageOutputStream s - an array of shorts to be written.off - the start offset in the data.len - the number of shorts to write.
IOException - if an I/O error occurs.
public void writeChars(char[] c,
int off,
int len)
throws IOException
ImageOutputStream len is 0, nothing is written.
The char c[off] is written first, then the char
c[off + 1], and so on. The byte order of the
stream is used to determine the order in which the individual
bytes are written.
If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.
writeChars in interface ImageOutputStream c - an array of chars to be written.off - the start offset in the data.len - the number of chars to write.
IOException - if an I/O error occurs.
public void writeInts(int[] i,
int off,
int len)
throws IOException
ImageOutputStream len is 0, nothing is written.
The int i[off] is written first, then the int
i[off + 1], and so on. The byte order of the
stream is used to determine the order in which the individual
bytes are written.
If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.
writeInts in interface ImageOutputStream i - an array of ints to be written.off - the start offset in the data.len - the number of ints to write.
IOException - if an I/O error occurs.
public void writeLongs(long[] l,
int off,
int len)
throws IOException
ImageOutputStream len is 0, nothing is written.
The long l[off] is written first, then the long
l[off + 1], and so on. The byte order of the
stream is used to determine the order in which the individual
bytes are written.
If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.
writeLongs in interface ImageOutputStream l - an array of longs to be written.off - the start offset in the data.len - the number of longs to write.
IOException - if an I/O error occurs.
public void writeFloats(float[] f,
int off,
int len)
throws IOException
ImageOutputStream len is 0, nothing is written.
The float f[off] is written first, then the float
f[off + 1], and so on. The byte order of the
stream is used to determine the order in which the individual
bytes are written.
If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.
writeFloats in interface ImageOutputStream f - an array of floats to be written.off - the start offset in the data.len - the number of floats to write.
IOException - if an I/O error occurs.
public void writeDoubles(double[] d,
int off,
int len)
throws IOException
ImageOutputStream len is 0, nothing is written.
The double d[off] is written first, then the double
d[off + 1], and so on. The byte order of the
stream is used to determine the order in which the individual
bytes are written.
If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.
writeDoubles in interface ImageOutputStream d - an array of doubless to be written.off - the start offset in the data.len - the number of doubles to write.
IOException - if an I/O error occurs.
public void writeBit(int bit)
throws IOException
ImageOutputStream If any bits of a particular byte have never been set at the time the byte is flushed to the destination, those bits will be set to 0 automatically.
writeBit in interface ImageOutputStream bit - an int whose least significant bit
is to be written to the stream.
IOException - if an I/O error occurs.
public void writeBits(long bits,
int numBits)
throws IOException
ImageOutputStream numBits
least significant bits of the bits argument in
left-to-right order, to the stream at the current bit offset
within the current byte position. The upper 64 -
numBits bits of the argument are ignored. The bit
offset is advanced by numBits and reduced modulo
8. Note that a bit offset of 0 always indicates the
most-significant bit of the byte, and bytes of bits are written
out in sequence as they are encountered. Thus bit writes are
always effectively in network byte order. The actual stream
byte order setting is ignored.
Bit data may be accumulated in memory indefinitely, until
flushBefore is called. At that time, all bit data
prior to the flushed position will be written.
If any bits of a particular byte have never been set at the time the byte is flushed to the destination, those bits will be set to 0 automatically.
writeBits in interface ImageOutputStream bits - a long containing the bits to be
written, starting with the bit in position numBits -
1 down to the least significant bit.numBits - an int between 0 and 64, inclusive.
IOException - if an I/O error occurs.
protected final void flushBits()
throws IOException
write(int) and
write(byte[], int, int) methods.
IOException - if an I/O error occurs.
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