org.apache.xalan.xsltc.dom

## Class BitArray

- java.lang.Object
- - org.apache.xalan.xsltc.dom.BitArray

- All Implemented Interfaces:
    java.io.Externalizable, java.io.Serializable

      public class BitArray
      extends java.lang.Object
      implements java.io.Externalizable

  Author:
    Morten Jorgensen
  See Also:
    Serialized Form

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `BitArray()` Constructor.
    `BitArray(int size)`
    `BitArray(int size, int[] bits)`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `BitArray` | `cloneArray()`
    `int[]` | `data()` Returns the integer array in which the bit array is contained
    `boolean` | `getBit(int bit)` Returns true if the given bit is set
    `int` | `getBitNumber(int pos)`
    `int` | `getMask()` See setMask()
    `int` | `getNextBit(int startBit)` Returns the next set bit from a given position
    `BitArray` | `merge(BitArray other)` Merge two bit arrays.
    `void` | `readExternal(java.io.ObjectInput in)` Read the whole tree from a file (serialized)
    `void` | `resize(int newSize)` Resizes the bit array - try to avoid using this method!!!
    `void` | `setBit(int bit)` Sets a given bit
    `void` | `setMask(int mask)` Set the mask for this bit array.
    `int` | `size()` Returns the size of this bit array (in bits).
    `void` | `writeExternal(java.io.ObjectOutput out)`

    - ### Methods inherited from class java.lang.Object

      `equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### BitArray

          public BitArray()

      Constructor. Defines the initial size of the bit array (in bits).

    - #### BitArray

          public BitArray(int size)

    - #### BitArray

          public BitArray(int size,
                  int[] bits)

  - ### Method Detail

    - #### setMask

          public void setMask(int mask)

      Set the mask for this bit array. The upper 8 bits of this mask indicate the DOM in which the nodes in this array belong.

    - #### getMask

          public int getMask()

      See setMask()

    - #### size

          public final int size()

      Returns the size of this bit array (in bits).

    - #### getBit

          public final boolean getBit(int bit)

      Returns true if the given bit is set

    - #### getNextBit

          public final int getNextBit(int startBit)

      Returns the next set bit from a given position

    - #### getBitNumber

          public final int getBitNumber(int pos)

    - #### data

          public final int[] data()

      Returns the integer array in which the bit array is contained

    - #### setBit

          public final void setBit(int bit)

      Sets a given bit

    - #### merge

          public final BitArray merge(BitArray other)

      Merge two bit arrays. This currently only works for nodes from a single DOM (because there is only one _mask per array).

    - #### resize

          public final void resize(int newSize)

      Resizes the bit array - try to avoid using this method!!!

    - #### cloneArray

          public BitArray cloneArray()

    - #### writeExternal

          public void writeExternal(java.io.ObjectOutput out)
                             throws java.io.IOException

      Specified by:
        `writeExternal` in interface `java.io.Externalizable`
      Throws:
        `java.io.IOException`

    - #### readExternal

          public void readExternal(java.io.ObjectInput in)
                            throws java.io.IOException,
                                   java.lang.ClassNotFoundException

      Read the whole tree from a file (serialized)
      Specified by:
        `readExternal` in interface `java.io.Externalizable`
      Throws:
        `java.io.IOException`
        `java.lang.ClassNotFoundException`

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