net.sf.saxon.tinytree
Class LargeStringBuffer
public final
class
LargeStringBuffer
extends Object
implements CharSequence, Serializable
This is an implementation of the JDK 1.4 CharSequence interface: it implements
a CharSequence as a list of arrays of characters (the individual arrays are known
as segments). When characters are appended, a new segment is started if the previous
array would otherwise overflow a threshold size (the maxAllocation size).
This is more efficient than a buffer backed by a contiguous array of characters
in cases where the size is likely to grow very large, and where substring operations
are rare. As used within the TinyTree, the value of each text node is contiguous within
one segment, so extraction of the value of a text node is efficient.
Method Summary |
void | append(CharSequence data)
Append a CharSequence to this LargeStringBuffer |
char | charAt(int index)
Returns the character at the specified index. |
boolean | equals(Object other)
Compare equality |
int | hashCode()
Generate a hash code |
int | length()
Returns the length of this character sequence. |
String | substring(int start, int end)
Returns a new character sequence that is a subsequence of this sequence.
|
CharSequence | subSequence(int start, int end)
Returns a new character sequence that is a subsequence of this sequence.
|
String | toString()
Convert to a string |
void | write(Writer writer)
Write the value to a writer |
public LargeStringBuffer()
Create an empty LargeStringBuffer with default space allocation
public LargeStringBuffer(int minAllocation, int maxAllocation)
Create an empty LargeStringBuffer
Parameters: minAllocation initial allocation size for each segment (including the first) maxAllocation maximum allocation size for each segment. When a segment reaches this
size, a new segment is created rather than appending more characters to the existing segment.
public void append(CharSequence data)
Append a CharSequence to this LargeStringBuffer
public char charAt(int index)
Returns the character at the specified index. An index ranges from zero
to
length() - 1. The first character of the sequence is at
index zero, the next at index one, and so on, as for array
indexing.
Parameters: index the index of the character to be returned
Returns: the specified character
Throws: IndexOutOfBoundsException
if the index argument is negative or not less than
length()
public boolean equals(Object other)
Compare equality
public int hashCode()
Generate a hash code
public int length()
Returns the length of this character sequence. The length is the number
of 16-bit UTF-16 characters in the sequence.
Returns: the number of characters in this sequence
public String substring(int start, int end)
Returns a new character sequence that is a subsequence of this sequence.
Unlike subSequence, this is guaranteed to return a String.
public CharSequence subSequence(int start, int end)
Returns a new character sequence that is a subsequence of this sequence.
The subsequence starts with the character at the specified index and
ends with the character at index
end - 1. The length of the
returned sequence is
end - start, so if
start == end
then an empty sequence is returned.
Parameters: start the start index, inclusive end the end index, exclusive
Returns: the specified subsequence
Throws: IndexOutOfBoundsException
if start or end are negative,
if end is greater than length(),
or if start is greater than end
public String toString()
Convert to a string
public void write(Writer writer)
Write the value to a writer