idset.java

一个工作流设计及定义的系统,可以直接与数据库结合进行系统工作流程的定义及应用.

/*
 * Copyright (c) 2005, John Mettraux, OpenWFE.org
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met:
 * 
 * . Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.  
 * 
 * . Redistributions in binary form must reproduce the above copyright notice, 
 *   this list of conditions and the following disclaimer in the documentation 
 *   and/or other materials provided with the distribution.
 * 
 * . Neither the name of the "OpenWFE" nor the names of its contributors may be
 *   used to endorse or promote products derived from this software without
 *   specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * $Id: IdSet.java,v 1.9 2005/05/17 16:41:06 jmettraux Exp $
 */

//
// IdSet.java
//
// [e-mail]
//
// generated with 
// jtmpl 1.1.00 16.08.2003 John Mettraux ([e-mail])
//

package openwfe.org.xdbc.query;

/**
 * A set of documentIds, may be set to negative to indicate "every documentIds
 * but not these here".
 *
 * <p><font size=2>CVS Info :
 * <br>$Author: jmettraux $
 * <br>$Id: IdSet.java,v 1.9 2005/05/17 16:41:06 jmettraux Exp $ </font>
 *
 * @author [e-mail]
 */
public class IdSet

    implements Cloneable

{

    /*
    private final static org.apache.log4j.Logger log = org.apache.log4j.Logger
        .getLogger(IdSet.class.getName());
    */

    //
    // CONSTANTS & co

    //
    // FIELDS

    protected boolean negative = false;
    protected java.util.Set set = new java.util.HashSet();
    protected java.util.Map clientIds = new java.util.HashMap();

    //
    // CONSTRUCTORS

    //
    // METHODS

    public java.util.Set getSet ()
    {
        return this.set;
    }

    public int size ()
    {
        return this.set.size();
    }

    public String getClientId (long docId)
    {
        return getClientId(new Long(docId));
    }

    public String getClientId (Long docId)
    {
        return (String)this.clientIds.get(docId);
    }

    public void setNegative (boolean negative)
    {
        this.negative = negative;
    }

    public boolean isNegative ()
    {
        return this.negative;
    }

    public boolean isPositive ()
    {
        return ! this.negative;
    }

    public void add (long l, String clientId)
    {
        add(new Long(l), clientId);
    }

    public void add (Long l, String clientId)
    {
        this.set.add(l);
        this.clientIds.put(l, clientId);
    }

    public Object clone ()
    {
        IdSet result = new IdSet();

        result.negative = this.negative;

        java.util.Iterator it = this.set.iterator();
        while (it.hasNext())
        {
            Long docId = (Long)it.next();
            String clientId = (String)this.clientIds.get(docId);
            result.add(docId, clientId);
        }

        return result;
    }

    //
    // STATIC METHODS

    public static IdSet doNot (IdSet set)
    {
        IdSet result = (IdSet)set.clone();
        result.setNegative( ! result.isNegative());
        return result;
    }

    public static IdSet doUnion (IdSet set1, IdSet set2)
    {
        if (set1.isNegative() && set2.isNegative())
        {
            return doNot(doIntersection(doNot(set1), doNot(set2)));
        }

        if (set1.isPositive() && set2.isPositive())
        {
            IdSet result = (IdSet)set1.clone();

            java.util.Iterator it = set2.set.iterator();
            while (it.hasNext())
            {
                Long docId = (Long)it.next();
                String clientId = set2.getClientId(docId);
                result.add(docId, clientId);
            }

            return result;
        }

        if (set1.isNegative())
        {
            IdSet tmpSet = set1;
            set1 = set2;
            set2 = tmpSet;
        }

        IdSet result = (IdSet)set1.clone();

        java.util.Iterator it = set2.set.iterator();
        while(it.hasNext())
        {
            Long docId = (Long)it.next();
            result.set.remove(docId);
            result.clientIds.remove(docId);
        }

        return result;
    }

    public static IdSet doIntersection (IdSet set1, IdSet set2)
    {
        if (set1.isNegative() && set2.isNegative())
        {
            return doNot(doUnion(doNot(set1), doNot(set2)));
        }

        if (set1.isPositive() && set2.isPositive())
        {
            IdSet result = new IdSet();

            java.util.Iterator it = set1.set.iterator();
            while (it.hasNext())
            {
                Long l = (Long)it.next();

                if (set2.set.contains(l))
                {
                    String clientId = set2.getClientId(l);
                    result.add(l, clientId);
                }
            }

            return result;
        }

        if (set1.isNegative())
        {
            IdSet tmpSet = set1;
            set1 = (IdSet)set2.clone();
            set2 = tmpSet;
        }

        java.util.Iterator it = set2.set.iterator();
        while (it.hasNext())
        {
            Long l = (Long)it.next();

            if (set1.set.contains(l)) 
            {
                set1.set.remove(l);
                set1.clientIds.remove(l);
            }
        }

        return set1;
    }

    public static IdSet extractDocumentIds (final java.sql.ResultSet rs)
        throws java.sql.SQLException
    {
        final IdSet result = new IdSet();

        while (rs.next()) 
            result.add(rs.getLong(1), rs.getString(2));

        return result;
    }

}