xmlinfohandler.java

Jive 是一个系统工程

/*
 *  XMLInfoHandler.java
 *  11/05/00
 *  CoolServlets.com
 */

package com.coolservlets.forum.xml;

import java.text.*;
import java.util.*;

import org.xml.sax.*;
import org.xml.sax.helpers.*;

public class XMLInfoHandler implements ContentHandler, ErrorHandler {

    private static SimpleDateFormat formatter =
		new SimpleDateFormat("yyyy/MM/dd HH:mm:ss.SS z");
    private Locator locator;
    private XMLInfo xmlinfo;
    private boolean inJiveBlock = false;
    private boolean inPropertyListBlock = false;
    private boolean inUserListBlock = false;
    private boolean inUserBlock = false;
    private boolean inUsernameBlock = false;
    private boolean inForumListBlock = false;
    private boolean inForumBlock = false;
    private boolean inForumnameBlock = false;
    private boolean inFilterBlock = false;

    public XMLInfoHandler( XMLInfo xmlinfo ) {
        this.xmlinfo = xmlinfo;
    }

    public void setDocumentLocator(Locator locator) {
        this.locator = locator;
    }

    public void startDocument() throws SAXException {
        System.err.println( "Starting parse ..." );
    }

    public void endDocument() throws SAXException {
        System.err.println( "... parse done." );
    }

    public void processingInstruction(String target, String data)
            throws SAXException
    {
    }

    public void startPrefixMapping(String prefix, String uri) {
    }

    public void endPrefixMapping(String prefix) {
    }

    public void startElement(String namespaceURI, String localName,
                             String rawName, Attributes atts)
            throws SAXException
    {
        if( inJiveBlock && localName.equals("PropertyList") ) {
            inPropertyListBlock = true;
        }
        else if( inPropertyListBlock && localName.equals("Property") ) {
            // get all attributes of this property, store in xmlinfo object
            int length = atts.getLength();
            String propName = null;
            String propValue = null;
            for( int i=0; i<length; i++ ) {
                String attName = atts.getLocalName(i);
                String value = null;
                if( attName.equalsIgnoreCase("name") ) {
                    propName = atts.getValue(i);
                }
                else if( attName.equalsIgnoreCase("value") ) {
                    propValue = atts.getValue(i);
                }
            }
            if( propName != null ) {
                xmlinfo.addProperty(propName,propValue);
            }
        }
        else if( inJiveBlock && localName.equals("UserList") ) {
            inUserListBlock = true;
            inJiveBlock = false;
        }
        else if( inUserListBlock && localName.equals("User") ) {
            inUserBlock = true;
        }
        else if( inUserBlock && localName.equals("Username") ) {
            inUsernameBlock = true;
        }
        else if( inJiveBlock && localName.equalsIgnoreCase("ForumList") ) {
            inForumListBlock = true;
            inJiveBlock = false;
        }
        else if( inForumListBlock && localName.equals("Forum") ) {
            inForumBlock = true;
        }
        else if( inForumBlock && localName.equals("Filter") ) {
            inFilterBlock = true;
        }
        else if( inForumBlock && !inFilterBlock && inForumListBlock && localName.equals("Name") ) {
            inForumnameBlock = true;
        }
        else if( localName.equals("GroupList")
                 || localName.equals("UserPermissionList")
                 || localName.equals("GroupPermissionList") )
        {
            inJiveBlock = false;
        }
        // Get the Jive XML version
        else if( localName.equals("Jive") ) {
            inJiveBlock = true;
            String version = "";
            String exportDate = "";
            int length = atts.getLength();
            for( int i=0; i<length; i++ ) {
                if( atts.getLocalName(i).equals("version") ) {
                    version = atts.getValue(i);
                }
                else if( atts.getLocalName(i).equals("exportDate") ) {
                    exportDate = atts.getValue(i);
                }
            }
            xmlinfo.setJiveXMLVersion( version );
            // parse the date
            try {
                Date date = formatter.parse(exportDate);
                xmlinfo.setExportDate(date);
            } catch( ParseException e ) {
                xmlinfo.setExportDate( new Date() );
            }
        }
    }

    public void endElement(String namespaceURI, String localName, String rawName)
            throws SAXException
    {
        if( inPropertyListBlock && !(inUserListBlock||inUserBlock||inUsernameBlock||inForumListBlock||inForumBlock||inForumnameBlock) && localName.equals("PropertyList") ) {
            inPropertyListBlock = false;
        }
        else if( (inUserListBlock||inJiveBlock) && localName.equals("UserList") ) {
            inUserListBlock = false;
            inJiveBlock = true;
        }
        else if( inUserBlock && !(inForumListBlock||inForumBlock) && localName.equals("User") ) {
            inUserBlock = false;
        }
        else if( inUsernameBlock && !(inForumListBlock||inForumBlock||inForumnameBlock) && localName.equals("Username") ) {
            inUsernameBlock = false;
        }
        else if( (inForumListBlock||!inJiveBlock) && !(inUserListBlock||inUserBlock||inUsernameBlock) && localName.equals("ForumList") ) {
            inForumListBlock = false;
            inJiveBlock = true;
        }
        else if( inForumBlock && localName.equals("Forum") ) {
            inForumBlock = false;
        }
        else if( inFilterBlock && localName.equals("Filter") ) {
            inFilterBlock = false;
        }
        else if( inForumnameBlock && localName.equals("Name") ) {
            inForumnameBlock = false;
        }
        else if( inJiveBlock && localName.equals("Jive") ) {
            inJiveBlock = false;
        }
        else if( !inJiveBlock &&
                 (localName.equals("GroupList")
                 || localName.equals("UserPermissionList")
                 || localName.equals("GroupPermissionList")))
        {
            inJiveBlock = true;
        }
    }

    public void characters(char[] ch, int start, int end)
            throws SAXException
    {
        if( inUsernameBlock ) {
            String username = new String( ch, start, end );
            xmlinfo.addUsername(username);
        }
        else if( inForumnameBlock && !inFilterBlock ) {
            String forumname = new String( ch, start, end );
            xmlinfo.addForumName(forumname);
        }
    }

    public void ignorableWhitespace(char[] ch, int start, int end)
            throws SAXException
    {
    }

    public void skippedEntity(String name) throws SAXException
    {
    }

    public void warning( SAXParseException e ) {
        System.err.println( "SAX parse warning: " + e );
        System.err.println( "At XML file line: " + locator.getLineNumber()
            + ":" + locator.getColumnNumber() );
    }

    public void error( SAXParseException e ) {
        fatalError(e);
    }

    public void fatalError( SAXParseException e ) {
        System.err.println( "SAX parse exception: " + e );
        System.err.println( "At XML file line: " + locator.getLineNumber()
            + ":" + locator.getColumnNumber() );
    }
}