File	Doc	Category	Size	Date	Package
CollationKey.java	API Doc	Android 1.5 API	4856	Wed May 06 22:41:04 BST 2009	com.ibm.icu4jni.text

CollationKey

• java.lang.Object

Fields Summary
private byte[]	m_bytes_
private static final int	UNSIGNED_BYTE_MASK_ Mask value to retrieve a single unsigned byte
private int	m_hash_ Cached hash value

Constructors Summary
CollationKey() Default constructor, for use by the Collator and its subclasses. m_hash_ = 0;
CollationKey(byte[] bytes) Constructor, for use only by the Collator and its subclasses. m_bytes_ = bytes; m_hash_ = 0;

Methods Summary
public int	compareTo(com.ibm.icu4jni.text.CollationKey target) Bitwise comparison for the collation keys param target CollationKey to be compared return comparison result from Collator, RESULT_LESS, RESULT_EQUAL, RESULT_GREATER stable ICU 2.4 byte tgtbytes[] = target.m_bytes_; if (m_bytes_ == null || m_bytes_.length == 0) { if (tgtbytes == null || tgtbytes.length == 0) { return Collator.RESULT_EQUAL; } return Collator.RESULT_LESS; } else { if (tgtbytes == null || tgtbytes.length == 0) { return Collator.RESULT_GREATER; } } int count = m_bytes_.length; if (tgtbytes.length < count) { count = tgtbytes.length; } int s, t; for (int i = 0; i < count; i ++) { // unable to use Arrays.equals s = m_bytes_[i] & UNSIGNED_BYTE_MASK_; t = tgtbytes[i] & UNSIGNED_BYTE_MASK_; if (s < t) { return Collator.RESULT_LESS; } if (s > t) { return Collator.RESULT_GREATER; } } if (m_bytes_.length < target.m_bytes_.length) { return Collator.RESULT_LESS; } if (m_bytes_.length > target.m_bytes_.length) { return Collator.RESULT_GREATER; } return Collator.RESULT_EQUAL;
public int	compareTo(java.lang.Object target) Bitwise comparison for the collation keys. Argument is casted to CollationKey param target CollationKey to be compared return comparison result from Collator, RESULT_LESS, RESULT_EQUAL, RESULT_GREATER stable ICU 2.4 return compareTo((CollationKey)target);
public boolean	equals(java.lang.Object target) Checks if target object is equal to this object. Target is first casted to CollationKey and bitwise compared. param target comparison object return true if both objects are equal, false otherwise stable ICU 2.4 if (this == target) { return true; } // checks getClass here since CollationKey is final not subclassable if (target == null || target.getClass() != getClass()) { return false; } return compareTo((CollationKey)target) == Collator.RESULT_EQUAL;
public int	hashCode() Creates a hash code for this CollationKey. Compute the hash by iterating sparsely over about 32 (up to 63) bytes spaced evenly through the string. For each byte, multiply the previous hash value by a prime number and add the new byte in, like a linear congruential random number generator, producing a pseudorandom deterministic value well distributed over the output range. return hash value of collation key. Hash value is never 0. stable ICU 2.4 if (m_hash_ == 0) { if (m_bytes_ != null || m_bytes_.length != 0) { int len = m_bytes_.length; int inc = ((len - 32) / 32) + 1; for (int i = 0; i < len;) { m_hash_ = (m_hash_ * 37) + m_bytes_[i]; i += inc; } } if (m_hash_ == 0) m_hash_ = 1; } return m_hash_;
public byte[]	toByteArray() Create the value of the Collation key in term of bytes return value of Collation key in bytes stable ICU 2.4 if (m_bytes_ == null || m_bytes_.length == 0) return null; return (byte[])m_bytes_.clone();