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/* Copyright (C) 2003 Vladimir Roubtsov. All rights reserved.
*
* This program and the accompanying materials are made available under
* the terms of the Common Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/cpl-v10.html
*
* $Id: IInclExclFilter.java,v 1.1.1.1 2004/05/09 16:57:33 vlad_r Exp $
*/
package com.vladium.emma.filter;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.StringTokenizer;
import com.vladium.util.WCMatcher;
// ----------------------------------------------------------------------------
/**
* @author Vlad Roubtsov, 2003
*/
public
interface IInclExclFilter
{
// public: ................................................................
// TODO: move this into util pkg
char INCLUSION_PREFIX = '+';
String INCLUSION_PREFIX_STRING = "+";
char EXCLUSION_PREFIX = '-';
String EXCLUSION_PREFIX_STRING = "-";
boolean included (final String s);
abstract class Factory
{
public static IInclExclFilter create (final String specs1, final String separators, final String [] specs2)
{
if ((specs1 == null) || (specs1.trim ().length () == 0))
return create (specs2);
else
{
final List /* String */ _specs = new ArrayList ();
if (specs2 != null)
{
for (int s = 0; s < specs2.length; ++ s)
{
_specs.add (specs2 [s]);
}
}
for (StringTokenizer tokenizer = new StringTokenizer (specs1, separators);
tokenizer.hasMoreTokens (); )
{
_specs.add (tokenizer.nextToken ());
}
final String [] specs = new String [_specs.size ()];
_specs.toArray (specs);
return create (specs);
}
}
public static IInclExclFilter create (final String [] specs)
{
if ((specs == null) || (specs.length == 0))
return new WCInclExclFilter ((String []) null, (String []) null);
final List inclusions = new ArrayList ();
final List exclusions = new ArrayList ();
for (int i = 0, iLimit = specs.length; i < iLimit; ++ i)
{
final String spec = specs [i];
if (spec.length () > 0)
{
if (spec.charAt (0) == EXCLUSION_PREFIX)
exclusions.add (spec.substring (1));
else
{
// [inclusion prefix is optional]
if (spec.charAt (0) == INCLUSION_PREFIX)
inclusions.add (spec.substring (1));
else
inclusions.add (spec);
}
}
}
return new WCInclExclFilter (inclusions, exclusions);
}
public static IInclExclFilter create (final String [] inclusions,
final String [] exclusions)
{
return new WCInclExclFilter (inclusions, exclusions);
}
public static IInclExclFilter create (final List /* String */ inclusions,
final List /* String */ exclusions)
{
return new WCInclExclFilter (inclusions, exclusions);
}
private static final class WCInclExclFilter implements IInclExclFilter
{
public boolean included (final String s)
{
if (s == null) return false;
final char [] chars = s.toCharArray ();
// included set is (inclusions - exclusions), where null inclusions
// mean 'everything' and null exclusions mean 'nothing':
final WCMatcher [] inclusions = m_inclusions;
final WCMatcher [] exclusions = m_exclusions;
if (inclusions != null)
{
boolean included = false;
for (int i = 0, iLimit = inclusions.length; i < iLimit; ++ i)
{
if (inclusions [i].matches (chars))
{
included = true;
break;
}
}
if (! included) return false;
}
if (exclusions != null)
{
for (int x = 0, xLimit = exclusions.length; x < xLimit; ++ x)
{
if (exclusions [x].matches (chars)) return false;
}
}
return true;
}
WCInclExclFilter (final String [] inclusions,
final String [] exclusions)
{
if ((inclusions == null) || (inclusions.length == 0))
m_inclusions = null;
else
{
m_inclusions = new WCMatcher [inclusions.length];
for (int i = 0; i < inclusions.length; ++ i)
{
m_inclusions [i] = WCMatcher.compile (inclusions [i]);
}
}
if ((exclusions == null) || (exclusions.length == 0))
m_exclusions = null;
else
{
m_exclusions = new WCMatcher [exclusions.length];
for (int i = 0; i < exclusions.length; ++ i)
{
m_exclusions [i] = WCMatcher.compile (exclusions [i]);
}
}
}
WCInclExclFilter (final List /* String */ inclusions,
final List /* String */ exclusions)
{
if ((inclusions == null) || inclusions.isEmpty ())
m_inclusions = null;
else
{
m_inclusions = new WCMatcher [inclusions.size ()];
int ii = 0;
for (Iterator i = inclusions.iterator (); i.hasNext (); ++ ii)
{
final String pattern = (String) i.next ();
m_inclusions [ii] = WCMatcher.compile (pattern);
}
}
if ((exclusions == null) || exclusions.isEmpty ())
m_exclusions = null;
else
{
m_exclusions = new WCMatcher [exclusions.size ()];
int ii = 0;
for (Iterator i = exclusions.iterator (); i.hasNext (); ++ ii)
{
final String pattern = (String) i.next ();
m_exclusions [ii] = WCMatcher.compile (pattern);
}
}
}
private final WCMatcher [] m_inclusions, m_exclusions;
} // end of nested class
} // end of nested class
} // end of interface
// ----------------------------------------------------------------------------
|
