/*
* Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
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/*
* (C) Copyright Taligent, Inc. 1996 - All Rights Reserved
* (C) Copyright IBM Corp. 1996 - All Rights Reserved
*
* The original version of this source code and documentation is copyrighted
* and owned by Taligent, Inc., a wholly-owned subsidiary of IBM. These
* materials are provided under terms of a License Agreement between Taligent
* and Sun. This technology is protected by multiple US and International
* patents. This notice and attribution to Taligent may not be removed.
* Taligent is a registered trademark of Taligent, Inc.
*
*/
package java.text;
/**
* A RuleBasedCollationKey is a concrete implementation of CollationKey class.
* The RuleBasedCollationKey class is used by the RuleBasedCollator class.
*/
final class
RuleBasedCollationKey extends
CollationKey {
/**
* Compare this RuleBasedCollationKey to target. The collation rules of the
* Collator object which created these keys are applied. <strong>Note:</strong>
* RuleBasedCollationKeys created by different Collators can not be compared.
* @param target target RuleBasedCollationKey
* @return Returns an integer value. Value is less than zero if this is less
* than target, value is zero if this and target are equal and value is greater than
* zero if this is greater than target.
* @see java.text.Collator#compare
*/
public int
compareTo(
CollationKey target)
{
int
result =
key.
compareTo(((
RuleBasedCollationKey)(
target)).
key);
if (
result <=
Collator.
LESS)
return
Collator.
LESS;
else if (
result >=
Collator.
GREATER)
return
Collator.
GREATER;
return
Collator.
EQUAL;
}
/**
* Compare this RuleBasedCollationKey and the target for equality.
* The collation rules of the Collator object which created these keys are applied.
* <strong>Note:</strong> RuleBasedCollationKeys created by different Collators can not be
* compared.
* @param target the RuleBasedCollationKey to compare to.
* @return Returns true if two objects are equal, false otherwise.
*/
public boolean
equals(
Object target) {
if (this ==
target) return true;
if (
target == null || !
getClass().
equals(
target.
getClass())) {
return false;
}
RuleBasedCollationKey other = (
RuleBasedCollationKey)
target;
return
key.
equals(
other.
key);
}
/**
* Creates a hash code for this RuleBasedCollationKey. The hash value is calculated on the
* key itself, not the String from which the key was created. Thus
* if x and y are RuleBasedCollationKeys, then x.hashCode(x) == y.hashCode() if
* x.equals(y) is true. This allows language-sensitive comparison in a hash table.
* See the CollatinKey class description for an example.
* @return the hash value based on the string's collation order.
*/
public int
hashCode() {
return (
key.
hashCode());
}
/**
* Converts the RuleBasedCollationKey to a sequence of bits. If two RuleBasedCollationKeys
* could be legitimately compared, then one could compare the byte arrays
* for each of those keys to obtain the same result. Byte arrays are
* organized most significant byte first.
*/
public byte[]
toByteArray() {
char[]
src =
key.
toCharArray();
byte[]
dest = new byte[ 2*
src.length ];
int
j = 0;
for( int
i=0;
i<
src.length;
i++ ) {
dest[
j++] = (byte)(
src[
i] >>> 8);
dest[
j++] = (byte)(
src[
i] & 0x00ff);
}
return
dest;
}
/**
* A RuleBasedCollationKey can only be generated by Collator objects.
*/
RuleBasedCollationKey(
String source,
String key) {
super(
source);
this.
key =
key;
}
private
String key = null;
}