filteredbase.java

java pos,你可以直接编译运行,

/*
 * Copyright (c) 2000 jPOS.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:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. 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.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *    "This product includes software developed by the jPOS project 
 *    (http://www.jpos.org/)". Alternately, this acknowledgment may 
 *    appear in the software itself, if and wherever such third-party 
 *    acknowledgments normally appear.
 *
 * 4. The names "jPOS" and "jPOS.org" must not be used to endorse 
 *    or promote products derived from this software without prior 
 *    written permission. For written permission, please contact 
 *    [e-mail].
 *
 * 5. Products derived from this software may not be called "jPOS",
 *    nor may "jPOS" appear in their name, without prior written
 *    permission of the jPOS project.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 JPOS PROJECT OR ITS 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the jPOS Project.  For more
 * information please see <http://www.jpos.org/>.
 */

package org.jpos.iso;

import java.util.Collection;
import java.util.Iterator;
import java.util.Observable;
import java.util.Vector;

import org.jpos.iso.ISOFilter.VetoException;
import org.jpos.util.LogEvent;

/**
 * Filtered Channel Base
 * 
 * @author <a href="mailto:[e-mail]">Alejandro P. Revilla</a>
 * @version $Revision: 1.6 $ $Date: 2003/10/13 10:34:14 $
 * @see FilteredChannel
 */

public abstract class FilteredBase extends Observable 
    implements FilteredChannel
{
    protected Vector incomingFilters, outgoingFilters;

    public FilteredBase () {
        super();
        incomingFilters = new Vector();
        outgoingFilters = new Vector();
    }

    /**
     * @param filter filter to add
     * @param direction ISOMsg.INCOMING, ISOMsg.OUTGOING, 0 for both
     */
    private void addFilter (ISOFilter filter, int direction) {
        switch (direction) {
            case ISOMsg.INCOMING :
                incomingFilters.add (filter);
                break;
            case ISOMsg.OUTGOING :
                outgoingFilters.add (filter);
                break;
            case 0 :
                incomingFilters.add (filter);
                outgoingFilters.add (filter);
                break;
        }
    }
    /**
     * @param filter incoming filter to add
     */
    public void addIncomingFilter (ISOFilter filter) {
        addFilter (filter, ISOMsg.INCOMING);
    }
    /**
     * @param filter outgoing filter to add
     */
    public void addOutgoingFilter (ISOFilter filter) {
        addFilter (filter, ISOMsg.OUTGOING);
    }

    /**
     * @param filter filter to add (both directions, incoming/outgoing)
     */
    public void addFilter (ISOFilter filter) {
        addFilter (filter, 0);
    }
    /**
     * @param filter filter to remove
     * @param direction ISOMsg.INCOMING, ISOMsg.OUTGOING, 0 for both
     */
    private void removeFilter (ISOFilter filter, int direction) {
        switch (direction) {
            case ISOMsg.INCOMING :
                incomingFilters.remove (filter);
                break;
            case ISOMsg.OUTGOING :
                outgoingFilters.remove (filter);
                break;
            case 0 :
                incomingFilters.remove (filter);
                outgoingFilters.remove (filter);
                break;
        }
    }
    /**
     * @param filter filter to remove (both directions)
     */
    public void removeFilter (ISOFilter filter) {
        removeFilter (filter, 0);
    }
    /**
     * @param filter incoming filter to remove
     */
    public void removeIncomingFilter (ISOFilter filter) {
        removeFilter (filter, ISOMsg.INCOMING);
    }
    /**
     * @param filter outgoing filter to remove
     */
    public void removeOutgoingFilter (ISOFilter filter) {
        removeFilter (filter, ISOMsg.OUTGOING);
    }
    protected ISOMsg applyOutgoingFilters (ISOMsg m, LogEvent evt) 
        throws VetoException
    {
        Iterator iter  = outgoingFilters.iterator();
        while (iter.hasNext()) {
            m.setDirection(ISOMsg.OUTGOING);
            m = ((ISOFilter) iter.next()).filter (this, m, evt);
        }
        m.setDirection(ISOMsg.OUTGOING);
        setChanged ();
        notifyObservers (m);
        return m;
    }
    protected ISOMsg applyIncomingFilters (ISOMsg m, LogEvent evt) 
        throws VetoException
    {
        Iterator iter  = incomingFilters.iterator();
        while (iter.hasNext()) {
            m.setDirection(ISOMsg.INCOMING);
            m = ((ISOFilter) iter.next()).filter (this, m, evt);
        }
        m.setDirection(ISOMsg.INCOMING);
        setChanged ();
        notifyObservers (m);
        return m;
    }
    public Collection getIncomingFilters() {
        return incomingFilters;
    }
    public Collection getOutgoingFilters() {
        return outgoingFilters;
    }
    public void setIncomingFilters (Collection filters) {
        incomingFilters = new Vector (filters);
    }
    public void setOutgoingFilters (Collection filters) {
        outgoingFilters = new Vector (filters);
    }
}