Package net.sf.saxon.tinytree
Class LargeStringBuffer
java.lang.Object
net.sf.saxon.tinytree.LargeStringBuffer
- All Implemented Interfaces:
Serializable
,CharSequence
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.
- See Also:
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Constructor Summary
ConstructorsConstructorDescriptionCreate an empty LargeStringBuffer with default space allocationLargeStringBuffer
(int minAllocation, int maxAllocation) Create an empty LargeStringBuffer -
Method Summary
Modifier and TypeMethodDescriptionvoid
append
(CharSequence data) Append a CharSequence to this LargeStringBufferchar
charAt
(int index) Returns the character at the specified index.boolean
Compare equalityint
hashCode()
Generate a hash codeint
length()
Returns the length of this character sequence.subSequence
(int start, int end) Returns a new character sequence that is a subsequence of this sequence.substring
(int start, int end) Returns a new character sequence that is a subsequence of this sequence.toString()
Convert to a stringvoid
Write the value to a writerMethods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
Methods inherited from interface java.lang.CharSequence
chars, codePoints, isEmpty
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Constructor Details
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LargeStringBuffer
public LargeStringBuffer()Create an empty LargeStringBuffer with default space allocation -
LargeStringBuffer
public LargeStringBuffer(int minAllocation, int maxAllocation) Create an empty LargeStringBuffer- Parameters:
minAllocation
- initial allocation size for each segment (including the first). If minAllocation exceeds maxAllocation, it is rounded down to the value of maxAllocationmaxAllocation
- 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.
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Method Details
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append
Append a CharSequence to this LargeStringBuffer -
length
public int length()Returns the length of this character sequence. The length is the number of 16-bit UTF-16 characters in the sequence.- Specified by:
length
in interfaceCharSequence
- Returns:
- the number of characters in this sequence
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charAt
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.- Specified by:
charAt
in interfaceCharSequence
- 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()
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subSequence
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.- Specified by:
subSequence
in interfaceCharSequence
- Parameters:
start
- the start index, inclusiveend
- 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
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toString
Convert to a string- Specified by:
toString
in interfaceCharSequence
- Overrides:
toString
in classObject
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equals
Compare equality -
hashCode
public int hashCode()Generate a hash code -
substring
Returns a new character sequence that is a subsequence of this sequence. Unlike subSequence, this is guaranteed to return a String. -
write
Write the value to a writer- Throws:
IOException
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