pagedavitem.java

wiki建站资源 java编写的 很好用

/*
 * (C) Janne Jalkanen 2005
 * 
 */
package com.ecyrd.jspwiki.dav.items;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Collection;

import org.apache.commons.lang.time.DateFormatUtils;
import org.jdom.Element;
import org.jdom.Namespace;

import com.ecyrd.jspwiki.WikiContext;
import com.ecyrd.jspwiki.WikiEngine;
import com.ecyrd.jspwiki.WikiPage;
import com.ecyrd.jspwiki.dav.DavPath;
import com.ecyrd.jspwiki.dav.DavProvider;
import com.ecyrd.jspwiki.dav.WikiDavProvider;

/**
 *  @author jalkanen
 *
 *  @since 
 */
public class PageDavItem extends DavItem
{
    protected WikiPage  m_page;
    protected Namespace m_dcns = Namespace.getNamespace( "dc", "http://purl.org/dc/elements/1.1/" );
    protected Namespace m_davns = Namespace.getNamespace( "DAV:" );
    
    /**
     * 
     */
    public PageDavItem( DavProvider provider, WikiPage page )
    {
        super( provider, new DavPath(page.getName()) );
        m_page = page;
    }

    protected Collection getCommonProperties()
    {
        ArrayList set = new ArrayList();
        
        set.add( new Element("resourcetype",m_davns) );
        set.add( new Element("creator",m_dcns).setText(m_page.getAuthor()) );
        set.add( new Element("getlastmodified",m_davns).setText(DateFormatUtils.ISO_DATETIME_TIME_ZONE_FORMAT.format(m_page.getLastModified())));
        set.add( new Element("displayname",m_davns).setText(m_page.getName()) );
        
        return set;
        
    }
    
    /* (non-Javadoc)
     * @see com.ecyrd.jspwiki.dav.DavItem#getPropertySet(int)
     */
    public Collection getPropertySet()
    {
        Collection set = getCommonProperties();
        
        set.add( new Element("getcontentlength",m_davns).setText( Long.toString(getLength())) );
        set.add( new Element("getcontenttype",m_davns).setText("text/plain; charset=\"UTF-8\""));

        return set;
    }

    public String getHref()
    {
        return m_provider.getURL( "dav/raw/"+m_page.getName()+".txt" );
    }

    /* (non-Javadoc)
     * @see com.ecyrd.jspwiki.dav.items.DavItem#getContentType()
     */
    public String getContentType()
    {
        // TODO Auto-generated method stub
        return "text/plain; charset=UTF-8";
    }

    /* (non-Javadoc)
     * @see com.ecyrd.jspwiki.dav.items.DavItem#getInputStream()
     */
    public InputStream getInputStream()
    {
        String text = ((WikiDavProvider)m_provider).getEngine().getPureText( m_page );
        
        try
        {
            ByteArrayInputStream in = new ByteArrayInputStream( text.getBytes("UTF-8") );
            
            return in;
        }
        catch( UnsupportedEncodingException e ) {}
        
        return null;
    }

    public long getLength()
    {
        // FIXME: Use getBytes()
        String text = ((WikiDavProvider)m_provider).getEngine().getPureText( m_page );
        return (long)text.length();
    }
}