Package com.itextpdf.text.pdf.qrcode
Class BitArray
- java.lang.Object
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- com.itextpdf.text.pdf.qrcode.BitArray
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public final class BitArray extends java.lang.Object
A simple, fast array of bits, represented compactly by an array of ints internally.
- Since:
- 5.0.2
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Constructor Summary
Constructors Constructor Description BitArray(int size)
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description void
clear()
Clears all bits (sets to false).void
flip(int i)
Flips bit i.boolean
get(int i)
int[]
getBitArray()
int
getSize()
boolean
isRange(int start, int end, boolean value)
Efficient method to check if a range of bits is set, or not set.private static int[]
makeArray(int size)
void
reverse()
Reverses all bits in the array.void
set(int i)
Sets bit i.void
setBulk(int i, int newBits)
Sets a block of 32 bits, starting at bit i.java.lang.String
toString()
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Method Detail
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getSize
public int getSize()
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get
public boolean get(int i)
- Parameters:
i
- bit to get- Returns:
- true iff bit i is set
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set
public void set(int i)
Sets bit i.- Parameters:
i
- bit to set
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flip
public void flip(int i)
Flips bit i.- Parameters:
i
- bit to set
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setBulk
public void setBulk(int i, int newBits)
Sets a block of 32 bits, starting at bit i.- Parameters:
i
- first bit to setnewBits
- the new value of the next 32 bits. Note again that the least-significant bit corresponds to bit i, the next-least-significant to i+1, and so on.
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clear
public void clear()
Clears all bits (sets to false).
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isRange
public boolean isRange(int start, int end, boolean value)
Efficient method to check if a range of bits is set, or not set.- Parameters:
start
- start of range, inclusive.end
- end of range, exclusivevalue
- if true, checks that bits in range are set, otherwise checks that they are not set- Returns:
- true iff all bits are set or not set in range, according to value argument
- Throws:
java.lang.IllegalArgumentException
- if end is less than or equal to start
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getBitArray
public int[] getBitArray()
- Returns:
- underlying array of ints. The first element holds the first 32 bits, and the least significant bit is bit 0.
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reverse
public void reverse()
Reverses all bits in the array.
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makeArray
private static int[] makeArray(int size)
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toString
public java.lang.String toString()
- Overrides:
toString
in classjava.lang.Object
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