package com.hwlcn.ldap.ldap.matchingrules;
import com.hwlcn.ldap.asn1.ASN1OctetString;
import com.hwlcn.core.annotation.ThreadSafety;
import com.hwlcn.ldap.util.ThreadSafetyLevel;
import static com.hwlcn.ldap.util.StaticUtils.*;
@ThreadSafety(level=ThreadSafetyLevel.COMPLETELY_THREADSAFE)
public final class CaseIgnoreStringMatchingRule
extends AcceptAllSimpleMatchingRule
{
private static final CaseIgnoreStringMatchingRule INSTANCE =
new CaseIgnoreStringMatchingRule();
public static final String EQUALITY_RULE_NAME = "caseIgnoreMatch";
static final String LOWER_EQUALITY_RULE_NAME =
toLowerCase(EQUALITY_RULE_NAME);
public static final String EQUALITY_RULE_OID = "2.5.13.2";
public static final String ORDERING_RULE_NAME = "caseIgnoreOrderingMatch";
static final String LOWER_ORDERING_RULE_NAME =
toLowerCase(ORDERING_RULE_NAME);
public static final String ORDERING_RULE_OID = "2.5.13.3";
public static final String SUBSTRING_RULE_NAME = "caseIgnoreSubstringsMatch";
static final String LOWER_SUBSTRING_RULE_NAME =
toLowerCase(SUBSTRING_RULE_NAME);
public static final String SUBSTRING_RULE_OID = "2.5.13.4";
private static final long serialVersionUID = -1293370922676445525L;
public CaseIgnoreStringMatchingRule()
{
}
public static CaseIgnoreStringMatchingRule getInstance()
{
return INSTANCE;
}
@Override()
public String getEqualityMatchingRuleName()
{
return EQUALITY_RULE_NAME;
}
@Override()
public String getEqualityMatchingRuleOID()
{
return EQUALITY_RULE_OID;
}
@Override()
public String getOrderingMatchingRuleName()
{
return ORDERING_RULE_NAME;
}
@Override()
public String getOrderingMatchingRuleOID()
{
return ORDERING_RULE_OID;
}
@Override()
public String getSubstringMatchingRuleName()
{
return SUBSTRING_RULE_NAME;
}
@Override()
public String getSubstringMatchingRuleOID()
{
return SUBSTRING_RULE_OID;
}
@Override()
public boolean valuesMatch(final ASN1OctetString value1,
final ASN1OctetString value2)
{
final byte[] value1Bytes = value1.getValue();
final byte[] value2Bytes = value2.getValue();
if (value1Bytes.length == value2Bytes.length)
{
for (int i=0; i< value1Bytes.length; i++)
{
final byte b1 = value1Bytes[i];
final byte b2 = value2Bytes[i];
if (((b1 & 0x7F) != (b1 & 0xFF)) ||
((b2 & 0x7F) != (b2 & 0xFF)))
{
return normalize(value1).equals(normalize(value2));
}
else if (b1 != b2)
{
if ((b1 == ' ') || (b2 == ' '))
{
return normalize(value1).equals(normalize(value2));
}
else if (Character.isUpperCase((char) b1))
{
final char c = Character.toLowerCase((char) b1);
if (c != ((char) b2))
{
return false;
}
}
else if (Character.isUpperCase((char) b2))
{
final char c = Character.toLowerCase((char) b2);
if (c != ((char) b1))
{
return false;
}
}
else
{
return false;
}
}
}
return true;
}
else
{
return normalizeInternal(value1, false, (byte) 0x00).equals(
normalizeInternal(value2, false, (byte) 0x00));
}
}
@Override()
public ASN1OctetString normalize(final ASN1OctetString value)
{
return normalizeInternal(value, false, (byte) 0x00);
}
@Override()
public ASN1OctetString normalizeSubstring(final ASN1OctetString value,
final byte substringType)
{
return normalizeInternal(value, true, substringType);
}
private static ASN1OctetString normalizeInternal(final ASN1OctetString value,
final boolean isSubstring,
final byte substringType)
{
final byte[] valueBytes = value.getValue();
if (valueBytes.length == 0)
{
return value;
}
final boolean trimInitial;
final boolean trimFinal;
if (isSubstring)
{
switch (substringType)
{
case SUBSTRING_TYPE_SUBINITIAL:
trimInitial = true;
trimFinal = false;
break;
case SUBSTRING_TYPE_SUBFINAL:
trimInitial = false;
trimFinal = true;
break;
default:
trimInitial = false;
trimFinal = false;
break;
}
}
else
{
trimInitial = true;
trimFinal = true;
}
boolean containsNonSpace = false;
boolean lastWasSpace = trimInitial;
int numDuplicates = 0;
for (final byte b : valueBytes)
{
if ((b & 0x7F) != (b & 0xFF))
{
return normalizeNonASCII(value, trimInitial, trimFinal);
}
if (b == ' ')
{
if (lastWasSpace)
{
numDuplicates++;
}
else
{
lastWasSpace = true;
}
}
else
{
containsNonSpace = true;
lastWasSpace = false;
}
}
if (! containsNonSpace)
{
return new ASN1OctetString(" ");
}
if (lastWasSpace && trimFinal)
{
numDuplicates++;
}
lastWasSpace = trimInitial;
int targetPos = 0;
final byte[] normalizedBytes = new byte[valueBytes.length - numDuplicates];
for (int i=0; i < valueBytes.length; i++)
{
switch (valueBytes[i])
{
case ' ':
if (lastWasSpace || (trimFinal && (i == (valueBytes.length - 1))))
{
}
else
{
if (targetPos < normalizedBytes.length)
{
normalizedBytes[targetPos++] = ' ';
lastWasSpace = true;
}
}
break;
case 'A':
normalizedBytes[targetPos++] = 'a';
lastWasSpace = false;
break;
case 'B':
normalizedBytes[targetPos++] = 'b';
lastWasSpace = false;
break;
case 'C':
normalizedBytes[targetPos++] = 'c';
lastWasSpace = false;
break;
case 'D':
normalizedBytes[targetPos++] = 'd';
lastWasSpace = false;
break;
case 'E':
normalizedBytes[targetPos++] = 'e';
lastWasSpace = false;
break;
case 'F':
normalizedBytes[targetPos++] = 'f';
lastWasSpace = false;
break;
case 'G':
normalizedBytes[targetPos++] = 'g';
lastWasSpace = false;
break;
case 'H':
normalizedBytes[targetPos++] = 'h';
lastWasSpace = false;
break;
case 'I':
normalizedBytes[targetPos++] = 'i';
lastWasSpace = false;
break;
case 'J':
normalizedBytes[targetPos++] = 'j';
lastWasSpace = false;
break;
case 'K':
normalizedBytes[targetPos++] = 'k';
lastWasSpace = false;
break;
case 'L':
normalizedBytes[targetPos++] = 'l';
lastWasSpace = false;
break;
case 'M':
normalizedBytes[targetPos++] = 'm';
lastWasSpace = false;
break;
case 'N':
normalizedBytes[targetPos++] = 'n';
lastWasSpace = false;
break;
case 'O':
normalizedBytes[targetPos++] = 'o';
lastWasSpace = false;
break;
case 'P':
normalizedBytes[targetPos++] = 'p';
lastWasSpace = false;
break;
case 'Q':
normalizedBytes[targetPos++] = 'q';
lastWasSpace = false;
break;
case 'R':
normalizedBytes[targetPos++] = 'r';
lastWasSpace = false;
break;
case 'S':
normalizedBytes[targetPos++] = 's';
lastWasSpace = false;
break;
case 'T':
normalizedBytes[targetPos++] = 't';
lastWasSpace = false;
break;
case 'U':
normalizedBytes[targetPos++] = 'u';
lastWasSpace = false;
break;
case 'V':
normalizedBytes[targetPos++] = 'v';
lastWasSpace = false;
break;
case 'W':
normalizedBytes[targetPos++] = 'w';
lastWasSpace = false;
break;
case 'X':
normalizedBytes[targetPos++] = 'x';
lastWasSpace = false;
break;
case 'Y':
normalizedBytes[targetPos++] = 'y';
lastWasSpace = false;
break;
case 'Z':
normalizedBytes[targetPos++] = 'z';
lastWasSpace = false;
break;
default:
normalizedBytes[targetPos++] = valueBytes[i];
lastWasSpace = false;
break;
}
}
return new ASN1OctetString(normalizedBytes);
}
private static ASN1OctetString normalizeNonASCII(final ASN1OctetString value,
final boolean trimInitial,
final boolean trimFinal)
{
final StringBuilder buffer = new StringBuilder(value.stringValue());
int pos = 0;
boolean lastWasSpace = trimInitial;
while (pos < buffer.length())
{
final char c = buffer.charAt(pos++);
if (c == ' ')
{
if (lastWasSpace || (trimFinal && (pos >= buffer.length())))
{
buffer.deleteCharAt(--pos);
}
else
{
lastWasSpace = true;
}
}
else
{
if (Character.isUpperCase(c))
{
buffer.setCharAt((pos-1), Character.toLowerCase(c));
}
lastWasSpace = false;
}
}
if (trimFinal && (buffer.length() > 0) &&
(buffer.charAt(buffer.length() - 1) == ' '))
{
buffer.deleteCharAt(buffer.length() - 1);
}
return new ASN1OctetString(buffer.toString());
}
}