net.sf.saxon.tinytree
Class CompressedWhitespace
java.lang.Object
net.sf.saxon.tinytree.CompressedWhitespace
- CharSequence
public class CompressedWhitespace
extends java.lang.Object
implements CharSequence
This class provides a compressed representation of a sequence of whitespace characters. The representation
is a sequence of bytes: in each byte the top two bits indicate which whitespace character is used
(x9, xA, xD, or x20) and the bottom six bits indicate the number of such characters. A zero byte is a filler.
We don't compress the sequence if it would occupy more than 8 bytes, because that's the space we've got available
in the TinyTree arrays.
char | charAt(int index) - Returns the
char value at the specified index.
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static CharSequence | compress(CharSequence in) - Attempt to compress a CharSequence
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boolean | equals(Object obj) - Indicates whether some other object is "equal to" this one.
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long | getCompressedValue()
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int | hashCode() - Returns a hash code value for the object.
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int | length()
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CharSequence | subSequence(int start, int end) - Returns a new
CharSequence that is a subsequence of this sequence.
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String | toString() - Returns a string representation of the object.
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static void | uncompress(long value, FastStringBuffer buffer)
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FastStringBuffer | uncompress(FastStringBuffer buffer) - Uncompress the whitespace to a FastStringBuffer
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void | write(Writer writer) - Write the value to a Writer
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void | writeEscape(boolean[] specialChars, Writer writer) - Write the value to a Writer with escaping of special characters
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CompressedWhitespace
public CompressedWhitespace(long compressedValue)
charAt
public char charAt(int index)
Returns the
char
value at the specified index. An index ranges from zero
to
length() - 1. The first
char
value of the sequence is at
index zero, the next at index one, and so on, as for array
indexing.
If the
char
value specified by the index is a
surrogate, the surrogate
value is returned.
index
- the index of the char
value to be returned
compress
public static CharSequence compress(CharSequence in)
Attempt to compress a CharSequence
in
- the CharSequence to be compressed
- the compressed sequence if it can be compressed; or the original CharSequence otherwise
equals
public boolean equals(Object obj)
Indicates whether some other object is "equal to" this one.
getCompressedValue
public long getCompressedValue()
hashCode
public int hashCode()
Returns a hash code value for the object.
length
public int length()
subSequence
public CharSequence subSequence(int start,
int end)
Returns a new CharSequence
that is a subsequence of this sequence.
The subsequence starts with the char
value at the specified index and
ends with the char
value at index end - 1. The length
(in char
s) of the
returned sequence is end - start, so if start == end
then an empty sequence is returned.
start
- the start index, inclusiveend
- the end index, exclusive
- the specified subsequence
toString
public String toString()
Returns a string representation of the object.
uncompress
public FastStringBuffer uncompress(FastStringBuffer buffer)
Uncompress the whitespace to a FastStringBuffer
buffer
- the buffer to which the whitespace is to be appended. The parameter may be
null, in which case a new buffer is created.
- the FastStringBuffer to which the whitespace has been appended. If a buffer was
supplied in the argument, this will be the same buffer.
write
public void write(Writer writer)
throws java.io.IOException
Write the value to a Writer
writeEscape
public void writeEscape(boolean[] specialChars,
Writer writer)
throws java.io.IOException
Write the value to a Writer with escaping of special characters